Buick Vehicle Models LaCrosse 2005-2009
Buick Vehicle Models LaCrosse 2005-2009 Torque Specifications
Complete Buick Vehicle Models LaCrosse 2005-2009 torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.
Updated
Important Information
Safety guidelines and reference information for proper torque application
Safety First
- Always verify torque specifications with your vehicle's factory service manual
- Use properly calibrated torque wrenches
- Replace all torque-to-yield (TTY) bolts - they are single-use only
- When in doubt, consult a professional mechanic
Quick Reference Guide
Quick Reference Guide
ft-lbs → Nm
× 1.356
ft-lbs → kg-m
× 0.138
Nm → ft-lbs
× 0.738
in-lbs → ft-lbs
× 0.083
Common Torque Patterns
Star Pattern
Used for wheels and other circular bolt patterns
Cross Pattern
Used for gaskets and cover plates
Sequential Pattern
Used for head bolts and other critical components
Common Mistakes to Avoid
Common Mistakes to Avoid
Over-tightening
Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.
Prevention:
Always use a calibrated torque wrench and follow specifications exactly.
Incorrect Torque Sequence
Tightening bolts in the wrong order can cause uneven pressure distribution and potential leaks or damage.
Prevention:
Follow the manufacturer's specified torque sequence pattern.
Dirty Threads
Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.
Prevention:
Clean and inspect all threads before assembly. Use new thread locker if specified.
Reusing TTY Bolts
Torque-to-yield bolts are designed to stretch and must not be reused.
Prevention:
Always replace TTY bolts with new ones. They are single-use only.
Dry vs. Lubricated
Not accounting for whether torque specs are for dry or lubricated fasteners can lead to incorrect tension.
Prevention:
Check if specs are for dry or lubricated threads. Use specified lubricant when required.
Recommended Tools
Recommended Tools
Torque Wrench (1/4" Drive)
Range: 2-25 ft-lbs
Small fasteners, delicate components
Torque Wrench (3/8" Drive)
Range: 10-100 ft-lbs
Most common automotive fasteners
Torque Wrench (1/2" Drive)
Range: 30-250 ft-lbs
Large fasteners, wheels
Angle Gauge
Torque-to-yield (TTY) bolts
Torque Wrench Care
- Calibrate annually or after 5,000 clicks
- Store at lowest setting
- Keep clean and lubricated
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Torque Calculator
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3.6l Engine
Torque specifications for 3.6L Engine
3.6l Engine
Torque specifications for 3.6L Engine
Cylinder Head
1 Cylinder Head Bolts
M11 x 1.5
1
Cylinder Head Bolts
M11 x 1.5
Torque Specification
1. 18 ft-lbs (25 N·m)
2. 90°
3. 70°
Important Notes
Tighten cylinder head bolts in the specified sequence. Initial torque is followed by two angle-tightening steps. Refer to service manual for the exact tightening sequence.
2 Camshaft Bearing Cap Bolts
M8 x 1.25
2
Camshaft Bearing Cap Bolts
M8 x 1.25
Torque Specification
1. 7.5 ft-lbs (10 N·m)
2. 30°
Important Notes
Tighten camshaft bearing cap bolts in the specified sequence. Torque to 7.5 ft-lbs (10 Nm), followed by a 30-degree angle turn. Refer to the service manual for the exact tightening sequence.
3 Rocker Arms/Shafts Bolts
M8 x 1.25
3
Rocker Arms/Shafts Bolts
M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
These bolts secure the rocker arm shafts to the cylinder head. Tighten evenly.
Engine Block
1 Main Bearing Bolts
M12 x 1.75
1
Main Bearing Bolts
M12 x 1.75
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
These bolts secure the main bearing caps to the engine block. Tighten in the specified sequence, using the proper torque procedure.
2 Connecting Rod Nuts
M9 x 1.25
2
Connecting Rod Nuts
M9 x 1.25
Torque Specification
1. 30 ft-lbs (40 N·m)
2. 60°
Important Notes
These nuts secure the connecting rod caps. Tighten to 30 ft-lbs (40 Nm), then an additional 60-degree angle turn. Refer to service manual for specific sequence.
3 Oil Pan Bolts
M6 x 1.0
3
Oil Pan Bolts
M6 x 1.0
Torque Specification
8.8 ft-lbs (12 N·m)
Important Notes
These bolts secure the oil pan to the engine block. Tighten in a criss-cross pattern.
4 Oil Filter Housing Bolt
M8 x 1.25
4
Oil Filter Housing Bolt
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These bolts secure the oil filter housing to the engine block. Tighten evenly.
5 Oil Drain Plug Bolt
M14 x 1.5
5
Oil Drain Plug Bolt
M14 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
This bolt seals the oil drain hole in the oil pan. Do not overtighten to avoid damage to threads and leaks.
6 Crankshaft Sensor Mounting Bolt
M6 x 1.0
6
Crankshaft Sensor Mounting Bolt
M6 x 1.0
Torque Specification
5.9 ft-lbs (8 N·m)
Important Notes
Secures the crankshaft sensor to the engine block. Do not overtighten.
7 Camshaft Sensor Mounting Bolt
M6 x 1.0
7
Camshaft Sensor Mounting Bolt
M6 x 1.0
Torque Specification
5.9 ft-lbs (8 N·m)
Important Notes
Secures the camshaft sensor to the engine block. Do not overtighten.
8 Knock Sensor Mounting Bolt
M8 x 1.25
8
Knock Sensor Mounting Bolt
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Secures the knock sensor to the engine block. Do not overtighten.
Valvetrain
1 Valve Cover Bolts
M6 x 1.0
1
Valve Cover Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
These bolts secure the valve covers to the cylinder heads. Tighten in a criss-cross pattern.
2 Timing Belt/Chain Tensioner Bolt
M8 x 1.25
2
Timing Belt/Chain Tensioner Bolt
M8 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Secures the timing chain tensioner. Proper tension is vital for accurate valve timing.
3 Camshaft Sprocket Bolt
M10 x 1.5
3
Camshaft Sprocket Bolt
M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
These bolts attach the camshaft sprockets to the camshafts. Ensure proper alignment during installation.
Intake Exhaust
1 Intake Manifold Bolts
M8 x 1.25
1
Intake Manifold Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These bolts secure the intake manifold to the cylinder heads. Tighten in a criss-cross pattern.
2 Throttle Body Bolts
M6 x 1.0
2
Throttle Body Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
These bolts attach the throttle body to the intake manifold. Tighten evenly.
3 Exhaust Manifold/Headers Bolts
M8 x 1.25
3
Exhaust Manifold/Headers Bolts
M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
These bolts attach the exhaust manifolds/headers to the cylinder heads. Tighten evenly, starting from the center.
4 EGR Valve Bolts
M6 x 1.0
4
EGR Valve Bolts
M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
These bolts attach the EGR valve to the intake/exhaust manifold. Tighten evenly.
5 PCV Valve Mounting Bolt
M6 x 1.0
5
PCV Valve Mounting Bolt
M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Secures the PCV valve to the intake manifold. Do not overtighten.
Fuel System
1 Fuel Rail Bolts
M6 x 1.0
1
Fuel Rail Bolts
M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These bolts secure the fuel rail to the intake manifold. Tighten evenly.
2 Fuel Injector Bolts
M6 x 1.0
2
Fuel Injector Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
These bolts secure fuel injectors to the intake manifold or cylinder head. Tighten evenly.
Cooling System
1 Water Pump Bolts
M8 x 1.25
1
Water Pump Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These bolts attach the water pump to the engine block. Tighten evenly.
2 Water Pump Pulley Bolts
M6 x 1.0
2
Water Pump Pulley Bolts
M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These bolts secure the water pump pulley to the water pump. Tighten evenly.
3 Thermostat Housing Bolts
M8 x 1.25
3
Thermostat Housing Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These bolts secure the thermostat housing to the engine. Tighten evenly.
4 Coolant Temperature Sensor Bolt
M6 x 1.0
4
Coolant Temperature Sensor Bolt
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Secures the coolant temperature sensor into the engine block. Do not overtighten.
Ignition System
1 Spark Plugs
M14 x 1.25
1
Spark Plugs
M14 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper seating of spark plugs before tightening. Do not overtighten.
2 Ignition Coil Bolt
M6 x 1.0
2
Ignition Coil Bolt
M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
These bolts secure the ignition coils to the valve covers. Do not overtighten.
Accessory Drive
1 Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
1
Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Secures the crankshaft pulley/harmonic balancer to the crankshaft. Proper torque is critical for operation.
2 Serpentine/Accessory Drive Belt Tensioner Bolt
M10 x 1.5
2
Serpentine/Accessory Drive Belt Tensioner Bolt
M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Secures the tensioner. Proper torque is crucial for correct belt tension.
3 Drive Belt Idler Pulley Bolt
M8 x 1.25
3
Drive Belt Idler Pulley Bolt
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secures the idler pulley to the engine. Tighten evenly.
Other
1 Flywheel Bolts
M10 x 1.5
1
Flywheel Bolts
M10 x 1.5
Torque Specification
75 ft-lbs (100 N·m)
Important Notes
These bolts attach the flywheel to the crankshaft. Ensure proper alignment during installation.
2 Power Steering Pump Mounting Bolts
M8 x 1.25
2
Power Steering Pump Mounting Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These bolts secure the power steering pump to the engine. Tighten evenly.
3 Engine Mount Bolts to Engine Block/Cylinder Head
M12 x 1.75
3
Engine Mount Bolts to Engine Block/Cylinder Head
M12 x 1.75
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Estimated value. Torque specification varies depending on location and type of engine mount. Consult service manual for each individual mount.
4 Oil Pressure Sensor Mounting Bolt
M6 x 1.0
4
Oil Pressure Sensor Mounting Bolt
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Secures the oil pressure sensor into the engine. Do not overtighten.
3.8l Engine
Torque specifications for 3.8L Engine
3.8l Engine
Torque specifications for 3.8L Engine
Cylinder Head
1 Cylinder Head Bolts
M10 x 1.5
1
Cylinder Head Bolts
M10 x 1.5
Torque Specification
1. 18 ft-lbs (25 N·m)
Important Notes
Follow specific torque sequence (usually an inside-out pattern) to ensure even clamping pressure. Tighten in stages.
2 Exhaust Manifold/Headers to Cylinder Head Bolts
M8 x 1.25
2
Exhaust Manifold/Headers to Cylinder Head Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Torque bolts evenly to prevent exhaust leaks.
3 Rocker Arms/Shafts Bolts
M8 x 1.25
3
Rocker Arms/Shafts Bolts
M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten evenly to ensure proper valve operation.
Engine Block
1 Main Bearing Bolts
M12 x 1.75
1
Main Bearing Bolts
M12 x 1.75
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Tighten in a specific sequence for proper bearing cap alignment. Lubricate bolt threads with engine oil.
2 Oil Pan Bolts
M6 x 1.0
2
Oil Pan Bolts
M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Tighten bolts in a criss-cross pattern to ensure even clamping and prevent leaks. Value converted from 106 in-lbs.
3 Camshaft Retainer Plate Bolts
M6 x 1.0
3
Camshaft Retainer Plate Bolts
M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensures proper camshaft endplay, preventing damage. Value converted from 106 in-lbs.
4 Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
4
Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Ensures proper accessory drive and dampens crankshaft vibrations. Apply engine oil to bolt threads.
5 Oil Drain Plug Bolt
M14 x 1.5
5
Oil Drain Plug Bolt
M14 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use a new crush washer for proper seal.
6 Engine Mount Bolts to Engine Block
M12 x 1.75
6
Engine Mount Bolts to Engine Block
M12 x 1.75
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Ensures proper engine mounting and vibration reduction.
Connecting Rod
1 Connecting Rod Nuts
M9 x 1.25
1
Connecting Rod Nuts
M9 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Apply engine oil to the threads before tightening. Tighten evenly.
Flywheel
1 Flywheel Bolts
M10 x 1.5
1
Flywheel Bolts
M10 x 1.5
Torque Specification
75 ft-lbs (100 N·m)
Important Notes
Apply thread locker to bolts before installing.
Valve Train
1 Valve Cover Bolts
M6 x 1.0
1
Valve Cover Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten evenly to prevent oil leaks.
2 Camshaft Sprocket Bolt
M10 x 1.5
2
Camshaft Sprocket Bolt
M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure proper camshaft timing.
Timing System
1 Timing Belt/Chain Tensioner Bolt
M8 x 1.25
1
Timing Belt/Chain Tensioner Bolt
M8 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensures proper timing and prevents engine damage.
Intake System
1 Intake Manifold Bolts
M8 x 1.25
1
Intake Manifold Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten bolts using a specified sequence to avoid vacuum leaks.
2 Throttle Body Bolts
M6 x 1.0
2
Throttle Body Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensures proper seal to prevent vacuum leaks.
3 EGR Valve Bolts
M8 x 1.25
3
EGR Valve Bolts
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper seal to prevent exhaust leaks.
Fuel System
1 Fuel Rail Bolts
M8 x 1.25
1
Fuel Rail Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensures leak-free connection for fuel delivery.
2 Fuel Injector Bolts
M6 x 1.0
2
Fuel Injector Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Secures injectors for proper fuel delivery.
Ignition System
1 Spark Plugs
M14 x 1.25
1
Spark Plugs
M14 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Proper torque is critical for heat transfer and prevents cylinder head damage. Apply anti-seize to threads.
2 Ignition Coil Bolt
M6 x 1.0
2
Ignition Coil Bolt
M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Value converted from 89 in-lbs. Ensures proper connection.
3 Crankshaft Position Sensor (CKP) Bolt
M6 x 1.0
3
Crankshaft Position Sensor (CKP) Bolt
M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Value converted from 89 in-lbs. Critical for ignition and fuel injection timing.
Cooling System
1 Water Pump Bolts
M8 x 1.25
1
Water Pump Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensures proper water pump operation and prevents coolant leaks.
2 Water Pump Pulley Bolts
M8 x 1.25
2
Water Pump Pulley Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensures proper pulley function and belt alignment.
3 Thermostat Housing Bolts
M8 x 1.25
3
Thermostat Housing Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Prevents coolant leaks.
4 Coolant Temperature Sensor
M12 x 1.5
4
Coolant Temperature Sensor
M12 x 1.5
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
Ensures proper seal and sensor function, prevents coolant leaks.
Lubrication System
1 Oil Filter Housing Bolt
M8 x 1.25
1
Oil Filter Housing Bolt
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secures oil filter housing and prevents oil leaks.
Accessory Drive
1 Power Steering Pump Mounting Bolts
M8 x 1.25
1
Power Steering Pump Mounting Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensures proper alignment and tension on the accessory drive belt.
Sensors
1 Knock Sensor
M8 x 1.25
1
Knock Sensor
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Proper torque allows for accurate sensor readings.
4t65 Transmission
Torque specifications for 4t65 Transmission
4t65 Transmission
Torque specifications for 4t65 Transmission
Transmission Mounting
1 Transmission Mounting Bolts
M12 x 1.75
1
Transmission Mounting Bolts
M12 x 1.75
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Use a criss-cross pattern when tightening to ensure even clamping force.
Transmission Case
1 Transmission Case Bolts (General)
M8 x 1.25
1
Transmission Case Bolts (General)
M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten in a criss-cross pattern. Estimated value.
2 Side Cover Bolts
M6 x 1.0
2
Side Cover Bolts
M6 x 1.0
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Estimated value. Use a criss-cross tightening sequence.
Oil Pan
1 Transmission Oil Pan Bolts
M6 x 1.0
1
Transmission Oil Pan Bolts
M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Use a criss-cross tightening pattern to ensure even gasket compression.
Fluid Plugs
1 Transmission Drain and Fill Plugs
M18 x 1.5
1
Transmission Drain and Fill Plugs
M18 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use a new sealing washer.
Valve Body
1 Valve Body Bolts
M6 x 1.0
1
Valve Body Bolts
M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Use a criss-cross tightening pattern to ensure even pressure.
Drivetrain
1 Drive Axle/Half Shaft Bolts
M10 x 1.5
1
Drive Axle/Half Shaft Bolts
M10 x 1.5
Torque Specification
147 ft-lbs (200 N·m)
Important Notes
Ensure the axle flange is fully seated before tightening.
2 Torque Converter Bolts
M10 x 1.5
2
Torque Converter Bolts
M10 x 1.5
Torque Specification
38 ft-lbs (52 N·m)
Important Notes
Tighten in a circular pattern, moving bolt to bolt.
Sensors
1 Input Shaft Sensor Bolt
M6 x 1.0
1
Input Shaft Sensor Bolt
M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Estimated value. Do not overtighten to avoid sensor damage.
2 Output Shaft Sensor Bolt
M6 x 1.0
2
Output Shaft Sensor Bolt
M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Estimated value. Do not overtighten to avoid sensor damage.
5.3l Engine
Torque specifications for 5.3L Engine
5.3l Engine
Torque specifications for 5.3L Engine
Cylinder Head
1 Cylinder Head Bolts
M11 x 1.5
1
Cylinder Head Bolts
M11 x 1.5
Torque Specification
1. 18 ft-lbs (25 N·m)
2. 90°
3. 70°
Important Notes
Torque in sequence. Always follow the manufacturer's service manual for correct sequence and angle torque specification. Angle torque must be performed after the initial torque is achieved.
Engine Block
1 Main Bearing Bolts
M12 x 1.75
1
Main Bearing Bolts
M12 x 1.75
Torque Specification
1. 15 ft-lbs (20 N·m)
2. 51 ft-lbs (69 N·m)
3. 80°
Important Notes
Torque in sequence, ensuring proper crankshaft alignment and bearing function. Final torque is achieved using angle torque. Always follow the manufacturer's service manual for correct sequence and angle torque specification. Angle torque must be performed after the initial torque is achieved.
2 Oil Pan Bolts
M6 x 1.0
2
Oil Pan Bolts
M6 x 1.0
Torque Specification
8.8 ft-lbs (12 N·m)
Important Notes
Torque bolts in a criss-cross pattern to ensure even pressure on the gasket. Avoid overtightening, which may cause damage to the oil pan or create leaks.
3 Oil Filter Housing Bolts
M8 x 1.25
3
Oil Filter Housing Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the gasket is properly aligned before installing. Torque to specification to prevent leaks.
4 Oil Drain Plug
M12 x 1.75
4
Oil Drain Plug
M12 x 1.75
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use a new crush washer each time the drain plug is removed. Proper torque ensures a leak-free seal and prevents stripping the threads.
5 Lifter Guide Bolt(s)
M8 x 1.25
5
Lifter Guide Bolt(s)
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These bolts, often found within the valley of the engine block, are torqued to ensure proper valve train operation.
6 Rear Main Seal Housing Bolts
M6 x 1.0
6
Rear Main Seal Housing Bolts
M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Correct torque is crucial for a proper seal and to prevent oil leaks.
7 Oil Pump Pickup Tube Bolts
M8 x 1.25
7
Oil Pump Pickup Tube Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Correct torque on these bolts is essential to avoid oil leaks and ensure that the pickup tube is securely mounted.
Connecting Rods
1 Connecting Rod Nuts
M9 x 1.0
1
Connecting Rod Nuts
M9 x 1.0
Torque Specification
1. 15 ft-lbs (20 N·m)
2. 70°
Important Notes
Torque in sequence to ensure even clamping pressure on the bearing. Final torque is achieved using angle torque. Always follow the manufacturer's service manual for correct sequence and angle torque specification. Angle torque must be performed after the initial torque is achieved.
Flywheel Flexplate
1 Flywheel/Flexplate Bolts
M11 x 1.5
1
Flywheel/Flexplate Bolts
M11 x 1.5
Torque Specification
75 ft-lbs (100 N·m)
Important Notes
Torque bolts in a star pattern to ensure even clamping pressure. Always use new bolts if specified in the service manual.
Valve Train
1 Valve Cover Bolts
M6 x 1.0
1
Valve Cover Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Torque bolts in a criss-cross pattern to ensure even pressure on the gasket. Avoid overtightening, which may cause damage to the valve cover or create leaks.
2 Rocker Arms/Shafts Bolts
M8 x 1.25
2
Rocker Arms/Shafts Bolts
M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Correct torque is critical for proper valve operation. Some vehicles may have specific sequences, check the service manual for confirmation.
3 Camshaft Sprocket Bolt
M10 x 1.5
3
Camshaft Sprocket Bolt
M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Correct torque is critical to avoid timing issues and potential engine damage. Ensure proper timing before final tightening.
Timing System
1 Timing Belt/Chain Tensioner Bolt
M8 x 1.25
1
Timing Belt/Chain Tensioner Bolt
M8 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
This bolt secures the timing chain tensioner to the engine block, maintaining proper chain tension for correct valve timing.
Accessory Drive
1 Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 2.0
1
Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 2.0
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Correct torque is crucial to avoid vibrations and ensure proper operation of the accessory drive system. It is critically important to follow all manufacturer specifications.
Intake System
1 Throttle Body Bolts
M6 x 1.0
1
Throttle Body Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Torque bolts evenly to ensure a proper seal. Overtightening can damage the throttle body or create leaks.
2 Intake Manifold Bolts
M8 x 1.25
2
Intake Manifold Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Torque in sequence to prevent vacuum leaks. Check service manual for proper sequence.
3 Intake Manifold Lower Bolts
M8 x 1.25
3
Intake Manifold Lower Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Torque in sequence to prevent vacuum leaks. Check service manual for proper sequence.
Exhaust System
1 Exhaust Manifold/Headers Bolts
M8 x 1.25
1
Exhaust Manifold/Headers Bolts
M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Torque in sequence to ensure a good seal. Check service manual for proper sequence.
2 Exhaust Manifold to Cylinder Head Studs
M8 x 1.25
2
Exhaust Manifold to Cylinder Head Studs
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Some 5.3L engines use studs to connect the exhaust manifolds to the cylinder head. Torqueing these correctly provides a good seal without damaging the stud or the cylinder head. Install studs finger tight prior to applying torque.
3 EGR Valve Bolts
M6 x 1.0
3
EGR Valve Bolts
M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Correct torque ensures a proper seal and prevents exhaust leaks, which can cause issues with engine performance and emissions.
Fuel System
1 Fuel Rail Bolts
M6 x 1.0
1
Fuel Rail Bolts
M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Proper torque ensures proper sealing and operation of the fuel delivery system.
2 Fuel Injector Bolts
M6 x 1.0
2
Fuel Injector Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Correct torque is vital for proper injector function and to prevent fuel leaks.
Ignition System
1 Spark Plugs
M14 x 1.25
1
Spark Plugs
M14 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Correct torque is critical for proper heat transfer, compression, and to prevent stripping the threads in the cylinder head. Always use anti-seize on the threads if required by the manufacturer.
2 Ignition Coil Bolts
M6 x 1.0
2
Ignition Coil Bolts
M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Correct torque ensures proper electrical contact and coil function.
Cooling System
1 Water Pump Bolts
M8 x 1.25
1
Water Pump Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These bolts secure the water pump to the engine block, ensuring proper coolant circulation.
2 Engine Coolant Temperature (ECT) Sensor
NPT 1/8"
2
Engine Coolant Temperature (ECT) Sensor
NPT 1/8"
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Correct torque is needed for the seal to work properly, and overtightening can damage the threads. Apply sealant or teflon tape as required by manufacturer specifications.
Sensors
1 Knock Sensor Bolts
M8 x 1.25
1
Knock Sensor Bolts
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Correct torque of the bolts used to install the knock sensors is important to ensure correct operation. Overtightening can damage the sensor or the mounting point on the block, while under tightening can allow vibrations which can cause the sensor to output faulty readings.
2 Camshaft Position Sensor Bolt
M6 x 1.0
2
Camshaft Position Sensor Bolt
M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Correct torque is important for sensor reliability.
3 Crankshaft Position Sensor Bolt
M6 x 1.0
3
Crankshaft Position Sensor Bolt
M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Correct torque is important for sensor reliability.
Body
Torque specifications for Body
Body
Torque specifications for Body
Fuel System
1 Fuel Tank Strap Bolts
M10 x 1.5
1
Fuel Tank Strap Bolts
M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure straps are correctly positioned before tightening. Check for fuel line interference after installation.
2 Fuel Filler Neck Bolts
M6 x 1.0
2
Fuel Filler Neck Bolts
M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Check for proper alignment with fuel door after installation. Do not overtighten.
Exterior Panels
1 Fender Bolts
M6 x 1.0
1
Fender Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure proper alignment before torquing. Use caution not to damage the paint.
2 Bumper Cover Mounting Bolts
M6 x 1.0
2
Bumper Cover Mounting Bolts
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Do not overtighten, as the bumper cover is plastic. Ensure correct alignment.
3 Grill Mounting Bolts
M5 x 0.8
3
Grill Mounting Bolts
M5 x 0.8
Torque Specification
6 ft-lbs (9 N·m)
Important Notes
Be careful not to crack plastic. Check for secure fit.
Closures
1 Hood Hinge Bolts
M8 x 1.25
1
Hood Hinge Bolts
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper alignment of the hood before torquing. Check operation after installation.
2 Door Hinge Bolts (Body Side)
M10 x 1.5
2
Door Hinge Bolts (Body Side)
M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure door is properly aligned. Check for smooth operation.
3 Door Latch/Striker Bolts
M8 x 1.25
3
Door Latch/Striker Bolts
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Adjust striker for proper latch engagement. Test operation after install.
Lighting
1 Headlight Assembly Mounting Bolts
M5 x 0.8
1
Headlight Assembly Mounting Bolts
M5 x 0.8
Torque Specification
5 ft-lbs (8 N·m)
Important Notes
Do not overtighten the plastic assembly. Check alignment and functionality.
2 Tail Light Assembly Mounting Bolts
M5 x 0.8
2
Tail Light Assembly Mounting Bolts
M5 x 0.8
Torque Specification
5 ft-lbs (8 N·m)
Important Notes
Do not overtighten the plastic assembly. Check alignment and functionality.
Interior Components
1 Seat Mounting Bolts
M10 x 1.5
1
Seat Mounting Bolts
M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure seats are properly positioned before tightening. Check for secure fit.
2 Seat Belt Anchor Bolts
M10 x 1.5
2
Seat Belt Anchor Bolts
M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Safety critical; do not reuse bolts. Ensure proper alignment and function.
Brakes
Torque specifications for Brakes
Brakes
Torque specifications for Brakes
Caliper Assembly
1 Brake Caliper Mounting Bolts
M12 x 1.75
1
Brake Caliper Mounting Bolts
M12 x 1.75
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
These bolts secure the caliper to the mounting bracket. Ensure proper torque to allow the caliper to slide freely.
2 Brake Pad Retaining Pin/Bolt
M6 x 1.0
2
Brake Pad Retaining Pin/Bolt
M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Estimated value. This may vary depending on the specific caliper design. Torque to prevent pad movement/rattling without binding the pads.
3 Brake Line Fitting (Caliper)
M10 x 1.0
3
Brake Line Fitting (Caliper)
M10 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value. Torque to ensure a leak-free seal. Do not over-tighten.
Caliper Bracket
1 Caliper Mounting Bracket Bolts
M14 x 1.5
1
Caliper Mounting Bracket Bolts
M14 x 1.5
Torque Specification
129 ft-lbs (175 N·m)
Important Notes
These bolts are critical for securing the bracket. Use the specified torque and sequence to maintain proper clamping force and alignment.
Rotor And Hub
1 Brake Disc/Drum Retaining Bolts
M6 x 1.0
1
Brake Disc/Drum Retaining Bolts
M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These bolts only hold the rotor or drum in place during installation. They are not structural components.
2 Brake Rotor Set Screw
M6 x 1.0
2
Brake Rotor Set Screw
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value. Torque to secure the rotor during installation. Not a critical structural component.
Wheel Mounting
1 Wheel Lug Nuts
M12 x 1.5
1
Wheel Lug Nuts
M12 x 1.5
Torque Specification
100 ft-lbs (136 N·m)
Important Notes
Use a star pattern when tightening. Crucial for preventing rotor warpage and wheel detachment.
Master Cylinder
1 Master Cylinder Mounting Bolts
M8 x 1.25
1
Master Cylinder Mounting Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure master cylinder is properly seated before tightening. Tighten evenly to prevent binding.
Brake Booster
1 Brake Booster Mounting Bolts/Nuts
M8 x 1.25
1
Brake Booster Mounting Bolts/Nuts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten evenly to ensure proper alignment and function of the booster.
Drivetrain
Torque specifications for Drivetrain
Drivetrain
Torque specifications for Drivetrain
Engine Flywheel Flexplate
1 Flywheel Bolts
M10 x 1.25
1
Flywheel Bolts
M10 x 1.25
Torque Specification
75 ft-lbs (100 N·m)
Important Notes
Apply thread locker. Torque in a star pattern to ensure even clamping force.
2 Flexplate Bolts
M10 x 1.25
2
Flexplate Bolts
M10 x 1.25
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Apply thread locker. Torque in a star pattern to ensure even clamping force. Value is an estimate, refer to OEM manual for exact spec.
3 Torque Converter Bolts
M8 x 1.25
3
Torque Converter Bolts
M8 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Apply thread locker. Tighten evenly. Value is an estimate, refer to OEM manual for exact spec.
Transmission Mounting
1 Transmission Mounting Bolts
M12 x 1.75
1
Transmission Mounting Bolts
M12 x 1.75
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Tighten evenly, ensure proper alignment before final torque. May require some bolts to be accessed from inside the engine bay.
Transmission Components
1 Transmission Oil Pan Bolts
M6 x 1.0
1
Transmission Oil Pan Bolts
M6 x 1.0
Torque Specification
8.8 in-lbs (12 N·m)
Important Notes
Tighten in a cross pattern to prevent leaks. Do not overtighten.
2 Transmission Drain and Fill Plugs
M18 x 1.5
2
Transmission Drain and Fill Plugs
M18 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use new sealing washers. Do not overtighten.
3 Output Shaft Seal Retainer Bolts
M8 x 1.25
3
Output Shaft Seal Retainer Bolts
M8 x 1.25
Torque Specification
17.5 ft-lbs (24 N·m)
Important Notes
Tighten evenly. Value is an estimate, refer to OEM manual for exact spec.
Driveshaft Propshaft
1 Propeller/Drive Shaft Bolts
M10 x 1.5
1
Propeller/Drive Shaft Bolts
M10 x 1.5
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Tighten in a cross pattern. Inspect all U-joints and check for wear.
2 Center Support Bearing Bolts
M10 x 1.5
2
Center Support Bearing Bolts
M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure correct driveshaft alignment before final torque. Value is an estimate, refer to OEM manual for exact spec.
Drive Axles Cv Joints
1 Drive Axle/Half Shaft Bolts
M10 x 1.5
1
Drive Axle/Half Shaft Bolts
M10 x 1.5
Torque Specification
147 ft-lbs (200 N·m)
Important Notes
Use thread locker. Torque evenly and securely. May have a torque sequence - consult your service manual.
2 CV Joint/Axle Nut
M24 x 1.5
2
CV Joint/Axle Nut
M24 x 1.5
Torque Specification
177 ft-lbs (240 N·m)
Important Notes
Use a new nut if specified. Torque to value and then confirm with angle torque if specified by OEM. Value is an estimate, refer to OEM manual for exact spec.
Differential
1 Differential Mounting Bolts
M12 x 1.75
1
Differential Mounting Bolts
M12 x 1.75
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Tighten evenly. Value is an estimate, refer to OEM manual for exact spec.
2 Differential Drain/Fill Plug
M18 x 1.5
2
Differential Drain/Fill Plug
M18 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Use new sealing washers. Do not overtighten.
Transfer Case
1 Transfer Case Drain/Fill Plug
M18 x 1.5
1
Transfer Case Drain/Fill Plug
M18 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Use new sealing washers. Do not overtighten.
Electrical
Torque specifications for Electrical
Electrical
Torque specifications for Electrical
Ignition System
1 Ignition Coil Mounting Bolt
M6 x 1.0
1
Ignition Coil Mounting Bolt
M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Ensure proper torque to maintain a good electrical connection and prevent coil damage.
Starting System
1 Starter Motor Mounting Bolt
M10 x 1.5
1
Starter Motor Mounting Bolt
M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure bolts are properly torqued to prevent starter misalignment and damage to the flywheel.
Charging System
1 Alternator Mounting Bolt
M8 x 1.25
1
Alternator Mounting Bolt
M8 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Proper torque is critical to maintain the alternator's alignment and prevent vibration.
Battery System
1 Battery Terminal Nut
M6 x 1.0
1
Battery Terminal Nut
M6 x 1.0
Torque Specification
5.9 ft-lbs (8 N·m)
Important Notes
Do not over-tighten as this can damage the battery terminals.
Engine Control System
1 Engine Control Module (ECM/PCM) Mounting Bolt
M6 x 1.0
1
Engine Control Module (ECM/PCM) Mounting Bolt
M6 x 1.0
Torque Specification
5.9 ft-lbs (8 N·m)
Important Notes
Estimated value. Tighten evenly to avoid stressing the module.
Grounding System
1 Ground Strap Mounting Bolt (Small)
M6 x 1.0
1
Ground Strap Mounting Bolt (Small)
M6 x 1.0
Torque Specification
8.8 ft-lbs (12 N·m)
Important Notes
Ensure contact surfaces are clean and free of corrosion. This is an estimated value for smaller ground strap bolts.
2 Ground Strap Mounting Bolt (Large)
M10 x 1.5
2
Ground Strap Mounting Bolt (Large)
M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure contact surfaces are clean and free of corrosion. This is an estimated value for larger ground strap bolts.
Body Control System
1 Body Control Module (BCM) Mounting Bolt
M6 x 1.0
1
Body Control Module (BCM) Mounting Bolt
M6 x 1.0
Torque Specification
5.9 ft-lbs (8 N·m)
Important Notes
Estimated value. Tighten evenly to avoid stressing the module.
Wiring Harness System
1 Wiring Harness Connector Retaining Screw/Bolt
M4 x 0.7
1
Wiring Harness Connector Retaining Screw/Bolt
M4 x 0.7
Torque Specification
3 ft-lbs (4 N·m)
Important Notes
Estimated value. Do not over tighten as these screws are small and can easily strip.
Power Distribution System
1 Fuse Box/Power Distribution Center Mounting Bolt
M6 x 1.0
1
Fuse Box/Power Distribution Center Mounting Bolt
M6 x 1.0
Torque Specification
8.8 ft-lbs (12 N·m)
Important Notes
Proper torque is important for grounding and prevent movement.
Emissions Sensors
Torque specifications for Emissions_sensors
Emissions Sensors
Torque specifications for Emissions_sensors
Exhaust System
1 Exhaust Manifold to Cylinder Head Bolts
M10 x 1.5
1
Exhaust Manifold to Cylinder Head Bolts
M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper sealing to prevent exhaust leaks. Use new gaskets.
2 Exhaust Manifold/Headers Bolts
M8 x 1.25
2
Exhaust Manifold/Headers Bolts
M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure proper sealing to prevent exhaust leaks. Use new gaskets.
3 Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.5
3
Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure proper alignment and use new gaskets to prevent exhaust leaks.
4 Upstream Oxygen Sensor
M18 x 1.5
4
Upstream Oxygen Sensor
M18 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Use anti-seize compound on threads. Do not over-tighten. This is an estimated value.
5 Downstream Oxygen Sensor
M18 x 1.5
5
Downstream Oxygen Sensor
M18 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Use anti-seize compound on threads. Do not over-tighten. This is an estimated value.
Egr System
1 EGR Valve Bolts
M8 x 1.25
1
EGR Valve Bolts
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper sealing to prevent exhaust leaks. Use new gaskets.
Intake System
1 Mass Air Flow (MAF) Sensor Mounting Screws
M5 x 0.8
1
Mass Air Flow (MAF) Sensor Mounting Screws
M5 x 0.8
Torque Specification
7 in-lbs (10 N·m)
Important Notes
Do not over-tighten, as these screws typically go into plastic.
2 Intake Air Temperature (IAT) Sensor
M8 x 1.25
2
Intake Air Temperature (IAT) Sensor
M8 x 1.25
Torque Specification
7 in-lbs (10 N·m)
Important Notes
Do not over-tighten, as this sensor often mounts into plastic.
3 Manifold Absolute Pressure (MAP) Sensor Mounting Bolt/Screw
M6 x 1.0
3
Manifold Absolute Pressure (MAP) Sensor Mounting Bolt/Screw
M6 x 1.0
Torque Specification
7 in-lbs (10 N·m)
Important Notes
Do not over-tighten, as this sensor often mounts to plastic. This is an estimated value.
Evap System
1 EVAP Purge Solenoid Valve Mounting Bolts/Screws
M6 x 1.0
1
EVAP Purge Solenoid Valve Mounting Bolts/Screws
M6 x 1.0
Torque Specification
7 in-lbs (10 N·m)
Important Notes
Ensure proper mounting to prevent vacuum leaks. Do not overtighten these screws as they often go into plastic.
Exhaust
Torque specifications for Exhaust
Exhaust
Torque specifications for Exhaust
Exhaust Manifold
1 Exhaust Manifold to Cylinder Head Bolts
M10 x 1.5
1
Exhaust Manifold to Cylinder Head Bolts
M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper gasket alignment. Tighten bolts in a criss-cross pattern to ensure even pressure.
2 Exhaust Manifold/Header Bolts
M10 x 1.5
2
Exhaust Manifold/Header Bolts
M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
These bolts secure the header pipes to the cylinder head, ensure proper gasket alignment.
3 Exhaust Pipe to Exhaust Manifold/Headers Bolts
M10 x 1.5
3
Exhaust Pipe to Exhaust Manifold/Headers Bolts
M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Use a new gasket. Tighten bolts evenly to ensure no leaks. These bolts are typically located at the flange connecting the exhaust pipe to the exhaust manifold.
Catalytic Converter
1 Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.5
1
Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure proper alignment and use new gaskets. Tighten evenly to avoid leaks. These bolts connect the catalytic converter flange to the adjacent exhaust pipe flange.
2 Exhaust Pipe Flange Bolts to Exhaust Pipe
M10 x 1.5
2
Exhaust Pipe Flange Bolts to Exhaust Pipe
M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Use new gaskets. Tighten bolts evenly for a proper seal. These bolts connect flanges of different sections of the exhaust pipe.
Muffler And Tailpipe
1 Muffler to Exhaust Pipe Bolts
M10 x 1.5
1
Muffler to Exhaust Pipe Bolts
M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Tighten evenly to prevent leaks or rattling. These bolts connect the muffler inlet flange to the adjacent exhaust pipe flange.
Sensors And Mounts
1 Oxygen (O2) Sensor Torque
M18 x 1.5
1
Oxygen (O2) Sensor Torque
M18 x 1.5
Torque Specification
31 ft-lbs (42 N·m)
Important Notes
Overtightening can damage the sensor. Use anti-seize on the threads.
2 Exhaust System Hangers/Bracket Bolts
M8 x 1.25
2
Exhaust System Hangers/Bracket Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure rubber hangers are in good condition. Do not overtighten. These bolts mount the exhaust system hangers to the vehicle's undercarriage.
Fuel
Torque specifications for Fuel
Fuel
Torque specifications for Fuel
Fuel Rail
1 Fuel Rail Mounting Bolts
M8 x 1.25
1
Fuel Rail Mounting Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even clamping force. Over-tightening can damage the rail or cause leaks.
2 Fuel Injector Mounting Bolts
M6 x 1.0
2
Fuel Injector Mounting Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure the injector is properly seated before tightening. Do not over-tighten to prevent damage to the injector or seals.
Fuel Pump
1 Fuel Pump Mounting Bolts
M8 x 1.25
1
Fuel Pump Mounting Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten bolts evenly to ensure a secure and leak-free seal. Torque in a circular pattern. Over-tightening can damage the fuel pump housing or tank.
Fuel Tank
1 Fuel Tank Strap Bolts
M10 x 1.5
1
Fuel Tank Strap Bolts
M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure even torque distribution across all strap bolts. Do not overtighten to avoid deformation of the tank or damage to mounting points.
2 Fuel Filler Neck Bolts
M6 x 1.0
2
Fuel Filler Neck Bolts
M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten evenly to ensure proper alignment and prevent leaks. Over-tightening can damage the filler neck or mounting points.
Fuel Filter
1 Fuel Filter Mounting Bolt/Nut
M8 x 1.25
1
Fuel Filter Mounting Bolt/Nut
M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the filter is properly seated before tightening. Do not over-tighten to prevent damage to the filter housing or connections.
Fuel Line
1 Fuel Line Connection Fittings (General)
Varies - consult specific fitting specs
1
Fuel Line Connection Fittings (General)
Varies - consult specific fitting specs
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated general torque. Specific torque must be verified against the manufacturer's specifications for each unique fitting type and size. Over-tightening can damage fittings and cause leaks. Under-tightening can also cause leaks. Always use the proper fitting wrench.
Hvac
Torque specifications for Hvac
Hvac
Torque specifications for Hvac
Ac Compressor
1 A/C Compressor Mounting Bolts
M10 x 1.5
1
A/C Compressor Mounting Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure mounting surfaces are clean. Use a calibrated torque wrench.
Ac Lines
1 A/C Line Fittings
varies, typically M8 x 1.25
1
A/C Line Fittings
varies, typically M8 x 1.25
Torque Specification
21 ft-lbs (28 N·m)
Important Notes
Use new O-rings and lubricate with refrigerant oil. Do not overtighten.
Evaporator Core
1 Evaporator Core Housing Bolts/Screws
M5 x 0.8
1
Evaporator Core Housing Bolts/Screws
M5 x 0.8
Torque Specification
4.17 ft-lbs (5.65 N·m)
Important Notes
Estimated value. Be careful not to overtighten and crack plastic housings.
Heater Core
1 Heater Core Inlet/Outlet Pipe Bolts
M6 x 1.0
1
Heater Core Inlet/Outlet Pipe Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (13.5 N·m)
Important Notes
Estimated value. Use new O-rings and lubricate. Do not overtighten.
Blend Door Actuator
1 Blend Door Actuator Mounting Bolts/Screws
M4 x 0.7
1
Blend Door Actuator Mounting Bolts/Screws
M4 x 0.7
Torque Specification
2.5 ft-lbs (3.39 N·m)
Important Notes
Estimated value. Be careful not to overtighten and crack plastic housings.
Mode Door Actuator
1 Mode Door Actuator Mounting Bolts/Screws
M4 x 0.7
1
Mode Door Actuator Mounting Bolts/Screws
M4 x 0.7
Torque Specification
2.5 ft-lbs (3.39 N·m)
Important Notes
Estimated value. Be careful not to overtighten and crack plastic housings.
Recirculation Door Actuator
1 Recirculation Door Actuator Mounting Bolts/Screws
M4 x 0.7
1
Recirculation Door Actuator Mounting Bolts/Screws
M4 x 0.7
Torque Specification
2.5 ft-lbs (3.39 N·m)
Important Notes
Estimated value. Be careful not to overtighten and crack plastic housings.
Blower Motor
1 Blower Motor Mounting Bolts/Screws
M5 x 0.8
1
Blower Motor Mounting Bolts/Screws
M5 x 0.8
Torque Specification
4.17 ft-lbs (5.65 N·m)
Important Notes
Estimated value. Ensure the blower motor is properly seated before tightening.
Blower Motor Resistor
1 Blower Motor Resistor Mounting Bolts/Screws
M4 x 0.7
1
Blower Motor Resistor Mounting Bolts/Screws
M4 x 0.7
Torque Specification
3 ft-lbs (4.06 N·m)
Important Notes
Estimated value. Make sure the resistor is correctly positioned before tightening.
Suspension
Torque specifications for Suspension
Suspension
Torque specifications for Suspension
Front Strut Assembly
1 Strut Upper Mounting Bolts
M10 x 1.5
1
Strut Upper Mounting Bolts
M10 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Secures the upper strut mount to the vehicle's body or frame. Ensure proper alignment before tightening.
2 Steering Knuckle/Hub Carrier to Strut Bolts/Nuts
M14 x 1.5
2
Steering Knuckle/Hub Carrier to Strut Bolts/Nuts
M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
These bolts/nuts connect the steering knuckle or hub carrier to the bottom of the strut assembly. They are crucial for holding the wheel assembly to the suspension, ensuring stable and safe control.
Front Control Arms
1 Control Arm Mounting Bolts (Frame/Subframe)
M14 x 1.5
1
Control Arm Mounting Bolts (Frame/Subframe)
M14 x 1.5
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Connects the control arm to the vehicle's frame or subframe. Torque these at ride height after suspension is loaded.
2 Control Arm to Steering Knuckle Ball Joint Nut
M12 x 1.5
2
Control Arm to Steering Knuckle Ball Joint Nut
M12 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Secures the ball joint to the control arm or steering knuckle. Ensure the ball joint is properly seated before tightening.
Front Steering
1 Tie Rod End Nut
M10 x 1.25
1
Tie Rod End Nut
M10 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Connects the tie rod end to the steering knuckle. Ensure proper alignment for correct steering function.
2 Sway Bar Link Nut
M10 x 1.5
2
Sway Bar Link Nut
M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Attaches the sway bar links to the sway bar and strut assembly. Ensure the sway bar link is properly positioned.
3 Sway Bar Mounting Bracket Bolts
M8 x 1.25
3
Sway Bar Mounting Bracket Bolts
M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Secures the sway bar mounting brackets to the vehicle's frame/subframe. Use care not to over torque.
Rear Suspension
1 Rear Trailing Arm Bolt (Front Mount)
M14 x 1.5
1
Rear Trailing Arm Bolt (Front Mount)
M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Connects the trailing arm to the body or subframe. Torque this bolt at ride height after suspension is loaded.
2 Rear Trailing Arm Bolt (Rear Mount)
M14 x 1.5
2
Rear Trailing Arm Bolt (Rear Mount)
M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Connects the trailing arm to the wheel hub carrier or steering knuckle. Torque this bolt at ride height after suspension is loaded.
3 Rear Upper Control Arm (Camber Arm) Bolts
M12 x 1.5
3
Rear Upper Control Arm (Camber Arm) Bolts
M12 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Secures the upper control arm (camber arm). Torque these bolts at ride height after suspension is loaded.
4 Rear Lower Control Arm (Toe Arm) Bolts
M12 x 1.5
4
Rear Lower Control Arm (Toe Arm) Bolts
M12 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Secures the lower control arm (toe arm). Torque these bolts at ride height after suspension is loaded.
Wheel Hub
1 Wheel Hub/Bearing Assembly Bolts/Nuts
M14 x 1.5
1
Wheel Hub/Bearing Assembly Bolts/Nuts
M14 x 1.5
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Secures the hub and bearing assembly to the steering knuckle. Ensure proper seating of the assembly.
Troubleshooting Guide
Common issues, diagnostic steps, and prevention guidelines
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
Loose Components
Symptoms:
- Rattling or vibration noises
- Visible movement in components
- Uneven panel gaps
Solutions:
- Clean threads and mounting surfaces
- Replace damaged fasteners
- Apply proper torque in sequence
- Use thread locker if specified
Stripped Fasteners
Symptoms:
- Unable to achieve proper torque
- Fastener spins freely
- Visible thread damage
Solutions:
- Use thread repair kit if appropriate
- Install thread insert (HeliCoil)
- Replace component if threaded hole is damaged
- Upgrade to higher grade fastener if recommended
Overtightened Components
Symptoms:
- Cracked or deformed parts
- Broken fasteners
- Compressed gaskets or seals
Solutions:
- Replace damaged components
- Use new fasteners
- Follow proper torque sequence
- Verify correct torque specifications
Diagnostic Steps
Visual inspection, torque verification, thread assessment
Diagnostic Steps
Visual inspection, torque verification, thread assessment
1
Visual Inspection
Inspect the affected area for any visible signs of damage or wear
- Check for cracks or deformation
- Look for signs of excessive wear
- Verify proper fastener installation
2
Torque Verification
Verify the torque applied to the fasteners
- Check the torque wrench calibration
- Verify the torque specification
- Compare the applied torque to the specification
3
Thread Assessment
Assess the condition of the threads
- Check for signs of thread damage
- Verify the thread type and size
- Check for proper thread engagement
Prevention Guidelines
Best practices, maintenance tips, tool care
Prevention Guidelines
Best practices, maintenance tips, tool care
Best Practices
- Always follow the recommended torque specification
- Use the correct type and size of fasteners
- Verify the torque wrench calibration regularly
Maintenance Tips
- Regularly inspect the affected area for signs of wear or damage
- Replace damaged or worn-out components promptly
- Keep the work area clean and organized
Tool Care
- Regularly clean and maintain the torque wrench
- Store the torque wrench in a dry and secure location
- Verify the torque wrench calibration before each use
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What IS the recommended torque value for the lug nuts on a 2007 Buick Lacrosse?
Q1
What IS the recommended torque value for the lug nuts on a 2007 Buick Lacrosse?
The recommended torque for the lug nuts on a 2007 Buick Lacrosse IS 100 ft-lbs.
Q2 Can I use a hand-held torque wrench to tighten the spark plugs on a 2005 Buick Lacrosse?
Q2
Can I use a hand-held torque wrench to tighten the spark plugs on a 2005 Buick Lacrosse?
Yes, you can use a hand-held torque wrench to tighten the spark plugs on a 2005 Buick Lacrosse. The recommended torque for the spark plugs IS 18 ft-lbs.
Q3 What IS the proper torque sequence for the cylinder head bolts on a 2009 Buick Lacrosse?
Q3
What IS the proper torque sequence for the cylinder head bolts on a 2009 Buick Lacrosse?
The proper torque sequence for the cylinder head bolts on a 2009 Buick Lacrosse IS as follows: first pass: 22 ft-lbs, second pass: 44 ft-lbs, final pass: 66 ft-lbs.
Q4 What IS the recommended torque for the intake manifold bolts on a 2006 Buick Lacrosse?
Q4
What IS the recommended torque for the intake manifold bolts on a 2006 Buick Lacrosse?
The recommended torque for the intake manifold bolts on a 2006 Buick Lacrosse IS 11 ft-lbs.
Q5 Can I use a torque multiplier to tighten the crankshaft pulley bolt on a 2008 Buick Lacrosse?
Q5
Can I use a torque multiplier to tighten the crankshaft pulley bolt on a 2008 Buick Lacrosse?
Yes, you can use a torque multiplier to tighten the crankshaft pulley bolt on a 2008 Buick Lacrosse. The recommended torque for the crankshaft pulley bolt IS 150 ft-lbs.
Environmental Considerations
Temperature, humidity, and seasonal effects on torque specifications
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
Temperature can significantly impact torque values and fastener behavior
Cold Weather
Effects:
- Increased material brittleness
- Higher torque required due to thread contraction
- Reduced thread lubricant effectiveness
Recommendations:
- Allow components to warm to room temperature when possible
- Consider using winter-grade thread lubricants
- Check torque values more frequently during winter months
Hot Weather
Effects:
- Thermal expansion of components
- Decreased friction in threads
- Accelerated lubricant breakdown
Recommendations:
- Check torque when components are at normal operating temperature
- Use temperature-resistant thread lockers
- Consider re-torquing after heat cycles
Humidity and Corrosion
Covers: Rust Prevention, Salt Exposure, Moisture Control
Humidity and Corrosion
Covers: Rust Prevention, Salt Exposure, Moisture Control
Moisture and corrosion can affect fastener integrity and torque values
High Humidity
Effects:
- Accelerated corrosion formation
- Reduced friction coefficient
- Potential thread seizing
Prevention:
- Use corrosion-resistant fasteners
- Apply appropriate anti-seize compounds
- Maintain proper protective coatings
Salt Exposure
Effects:
- Rapid corrosion development
- Thread damage
- Seized fasteners
Prevention:
- Regular underbody washing
- Use of sacrificial anodes where appropriate
- Application of protective coatings
Seasonal Maintenance
Spring, Summer, Fall, and Winter maintenance schedules
Seasonal Maintenance
Spring, Summer, Fall, and Winter maintenance schedules
Spring
- Inspect for winter damage
- Clean and protect exposed fasteners
- Check torque on critical components
Summer
- Monitor heat-affected components
- Check expansion-related loosening
- Inspect cooling system mounts
Fall
- Prepare for winter conditions
- Apply corrosion protection
- Verify all fasteners are properly torqued
Winter
- More frequent inspection of critical fasteners
- Check for salt damage
- Monitor suspension component torque
Related Resources
Tools, service procedures, and technical bulletins
Recommended Tools
Digital Torque Wrench (10-100 Nm)
Essential for tightening fasteners to precise torque specifications, preventing damage and ensuring proper assembly. This range IS suitable for many applications on the Lacrosse.
- Digital display for accurate readings
- Audible alarm when target torque IS reached
- Multiple units (Nm, ft-lb, in-lb)
- Reversible ratcheting mechanism
Service Procedures
Cylinder Head Bolt Tightening Procedure
Step-by-step guide for proper tightening of cylinder head bolts on the Buick Lacrosse 2005-2009.
- Clean all mating surfaces and apply a thin coat of engine oil to the threads and washers.
- Install the bolts and tighten them in the following sequence:
- center bolts to 30 Nm (22.1 ft-lb)
- outer bolts to 40 Nm (29.5 ft-lb)
- final torque of 60 Nm (44.3 ft-lb) in a crisscross pattern
- Safety considerations: Ensure the engine IS cold and the key IS not in the ignition.
- Specific instructions: Use a new cylinder head gasket and torque wrench for accurate tightening.
Suspension Component Torque Specifications
Overview of torque values for various suspension components on the Buick Lacrosse 2005-2009.
- Ball joints: 45-55 Nm (33-41 ft-lb)
- Control arms: 65-80 Nm (48-59 ft-lb)
- Sway bar end links: 25-35 Nm (18-26 ft-lb)
- Strut bolts: 55-70 Nm (41-52 ft-lb)
- Hub bolts: 115-140 Nm (85-103 ft-lb)
- Safety considerations: Elevate the vehicle safely and use proper jack stands.
- Specific instructions: Refer to vehicle service manual for specific torque values based on component and year.
Technical Service Bulletins
TSB 05-08-51-008: Revised Torque Specifications for Engine Mounts
2005-06-21Provides updated torque specifications for engine mounts on the 2005-2009 Buick Lacrosse.
2005-2009 Lacrosse
Resolution: Replaces previous torque specification for engine mount nuts to 55-70 Nm (41-52 ft-lb). Refer to TSB for detailed instructions and safety precautions.
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Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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