Buick Vehicle Models Enclave 2018-present Torque Specifications
Buick Vehicle Models Enclave 2018-present

Buick Vehicle Models Enclave 2018-present Torque Specifications

Complete Buick Vehicle Models Enclave 2018-present 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

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

Star Pattern torque pattern diagram showing proper bolt tightening sequence
Cross Pattern

Used for gaskets and cover plates

Cross Pattern torque pattern diagram showing proper bolt tightening sequence
Sequential Pattern

Used for head bolts and other critical components

Sequential Pattern torque pattern diagram showing proper bolt tightening sequence

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

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

Search Specifications

Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

3.6l Engine

Torque specifications for 3.6L Engine

Cylinder Head

1

Cylinder Head Bolts

M12 x 1.75
Torque Specification
1. 26 ft-lbs (35 N·m) 2. 90° 3. 90°
Important Notes
Cylinder head bolts are torque-to-yield. Use a new set of bolts every time. Follow a specific torque sequence and angle-tightening process. Refer to factory service manual for exact sequence.
2

Camshaft Bearing Cap Bolts

M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Tighten in sequence to evenly clamp the camshaft journals. Do not overtighten.
3

Valve Cover Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Ensure valve cover is properly seated to prevent leaks.
4

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper alignment of rocker arms during installation.
5

Ignition Coil Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Ensure proper coil seating.

Engine Block

1

Main Bearing Bolts

M12 x 1.5
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Tighten in specified sequence to ensure proper crankshaft alignment. Check main bearing journal diameters for consistency.
2

Connecting Rod Nuts

M9 x 1.0
Torque Specification
1. 20 ft-lbs (27 N·m) 2. 60°
Important Notes
Connecting rod bolts/nuts are typically torque-to-yield. Use new bolts and follow specified sequence. Always verify connecting rod end play.
3

Oil Pan Bolts

M6 x 1.0
Torque Specification
8.8 ft-lbs (12 N·m)
Important Notes
Use new oil pan gasket and evenly tighten to prevent leaks.
4

Timing Cover Bolts

M6 x 1.0
Torque Specification
8.8 ft-lbs (12 N·m)
Important Notes
Use new timing cover gasket or sealant. Tighten evenly in a criss-cross pattern.
5

Oil Drain Plug

M14 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use new crush washer each time to prevent oil leaks. Do not overtighten.
6

Knock Sensor Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure sensor is properly seated. Do not overtighten.
7

Crankshaft Position Sensor Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Ensure proper sensor seating against the engine block.

Intake Exhaust

1

Intake Manifold Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Use new intake manifold gaskets, tighten in a criss-cross pattern to prevent leaks.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Use new exhaust manifold gaskets. Tighten evenly to prevent leaks.
3

Throttle Body Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure throttle body is properly aligned and seated to prevent vacuum leaks.
4

EGR Valve Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure EGR valve is properly seated with a new gasket. Prevents exhaust leaks.
5

Fuel Rail Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure fuel rail is properly seated. Prevents fuel leaks.
6

Fuel Injector Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure fuel injectors are properly seated.

Rotating Assembly

1

Flywheel Bolts

M10 x 1.5
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Ensure flywheel or flexplate is properly aligned before tightening.
2

Camshaft Sprocket Bolt

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure proper alignment of camshaft timing marks.
3

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure crankshaft pulley is properly seated against crankshaft.
4

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Ensure proper alignment of timing marks before tightening.

Cooling System

1

Water Pump Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use new water pump gasket or sealant. Tighten evenly in a criss-cross pattern.
2

Water Pump Pulley Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure pulley is properly seated on the pump.
3

Thermostat Housing Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use new thermostat housing gasket or sealant. Tighten evenly to prevent leaks.

Electrical System

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure starter motor is properly aligned before tightening.
2

Alternator Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure alternator is properly aligned before tightening.
3

Camshaft Position Sensor Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Ensure proper seating of the sensor to the engine.

Accessory Drive

1

Serpentine/Accessory Drive Belt Tensioner Bolt

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure tensioner is aligned and seated correctly.
2

Drive Belt Idler Pulley Bolt

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure idler pulley is properly seated.

Power Steering

1

Power Steering Pump Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure power steering pump is correctly aligned before tightening.

9t65 Transmission

Torque specifications for 9t65 Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.75
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure bolts are properly engaged before tightening. Tighten evenly.

Transmission Case

1

Transmission Case Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even clamping pressure. Consult specific diagrams for exact torque values, estimated value.
2

Bellhousing Bolts

M12 x 1.75
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
These bolts attach the transmission housing to the engine bellhousing.

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
8.83 ft-lbs (12 N·m)
Important Notes
Tighten bolts in a criss-cross pattern. Use a new gasket when installing to ensure proper sealing.

Transmission Plugs

1

Transmission Drain/Fill Plugs

M18 x 1.5
Torque Specification
8.83 ft-lbs (12 N·m)
Important Notes
Use a new sealing washer when installing. Do not over tighten.

Drivetrain

1

Drive Axle/Half Shaft Bolts

M10 x 1.5
Torque Specification
118 ft-lbs (160 N·m)
Important Notes
Ensure proper seating of the axle before tightening. Tighten bolts evenly.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
177 ft-lbs (240 N·m)
Important Notes
This nut secures the axle shaft to the wheel hub. Use a new nut when installing.

Transmission Control Module

1

TCM Mounting Bolts

M5 x 0.8
Torque Specification
7.42 ft-lbs (10 N·m)
Important Notes
Ensure the TCM is correctly positioned before tightening. Do not over-tighten these small bolts.

Transmission Internal Components

1

Valve Body and Solenoid Mounting Bolts

M5 x 0.8
Torque Specification
7.42 ft-lbs (10 N·m)
Important Notes
These bolts require low torque due to small size and precise seating requirements. Torque values may vary depending on the component, estimated value.

Transmission Cooler Lines

1

Transmission Cooler Line Fittings

M16 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use new sealing washers/O-rings to prevent leaks. Do not over-tighten.

Torque Converter

1

Torque Converter Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the torque converter is correctly positioned before tightening. Tighten bolts evenly.

Shift Cable Bracket

1

Shift Cable Bracket Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the bracket is correctly aligned before tightening. Tighten bolts evenly.

Body

Torque specifications for Body

Wheel And Tire

1

Wheel Lug Nuts

M14 x 1.5
Torque Specification
1. 140 ft-lbs (190 N·m)
Important Notes
Tighten lug nuts in a star pattern to ensure even pressure on the wheel.

Fuel System

1

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure proper alignment of tank straps before tightening bolts.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Use care not to overtighten these bolts. This specification is based on manufacturer torque for similar sized bolts and materials, please verify vehicle service manual before tightening.

Body Panels

1

Door Hinge Bolts (Body Side)

M10 x 1.5
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Estimated torque based on similar components. Verify bolt size on the vehicle. Ensure proper door alignment after tightening.
2

Hood Hinge Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated torque based on similar components. Verify bolt size on the vehicle. Ensure proper hood alignment after tightening.
3

Fender Mounting Bolts

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated torque based on similar components. Verify bolt size on the vehicle. Ensure proper panel alignment after tightening.
4

Bumper Cover Mounting Bolts

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Estimated torque based on similar components. Verify bolt size on the vehicle. Ensure proper panel alignment after tightening.
5

Tailgate/Liftgate Hinge Bolts

M10 x 1.5
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Estimated torque based on similar components. Verify bolt size on the vehicle. Ensure proper alignment and smooth operation after tightening.

Interior Components

1

Seat Mounting Bolts (to Floor Pan)

M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated torque based on similar components. Verify bolt size on the vehicle. Ensure proper alignment and secure fit of the seat.
2

Seat Belt Anchor Bolts (to Body)

M12 x 1.75
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated torque based on similar components. Verify bolt size on the vehicle. Ensure the anchor is securely mounted to the body.

Exterior Trim

1

Side Mirror Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Estimated torque based on similar components. Verify bolt size on the vehicle. Do not overtighten to prevent damage to the mirror housing.

Brakes

Torque specifications for Brakes

Caliper Mounting

1

Caliper Guide Pin Bolts

M10 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
These bolts secure the brake caliper to the caliper mounting bracket. Ensure proper lubrication of the guide pins during installation. Use a new bolt if they are of the single-use variety.
2

Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
129 ft-lbs (175 N·m)
Important Notes
These bolts secure the caliper mounting bracket to the steering knuckle. It's important to follow a cross-tightening sequence to evenly distribute the clamping force. Ensure all mating surfaces are clean and free from debris.

Rotor Attachment

1

Brake Rotor Retaining Bolts (Lug Bolts)

M14 x 1.5
Torque Specification
133 ft-lbs (180 N·m)
Important Notes
These bolts secure the brake rotor to the hub assembly via the wheel. Ensure the mating surfaces are clean before installation. Typically these bolts are tightened with the wheel installed, but the final torque is for the bolts themselves
2

Brake Rotor Set Screw

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
This small set screw secures the brake rotor to the hub for assembly purposes. Do not overtighten as it is only meant to hold the rotor in place. This value is estimated.

Hydraulic Connections

1

Brake Hose Banjo Bolt

M10 x 1.0
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
These bolts secure the brake hose to the caliper. Always use new crush washers. Torque values may vary based on specific fitting and thread size. This value is estimated.
2

Brake Line Fitting (at caliper)

M10 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
This is the threaded fitting for the hard line connecting to the caliper. Ensure that there are no leaks after tightening. This value is estimated.

Drivetrain

Torque specifications for Drivetrain

Engine To Transmission

1

Flywheel Bolts

M12 x 1.25
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Use a star pattern when tightening these bolts.
2

Transmission Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Tighten bolts evenly, alternating sides to prevent misalignment.

Transmission Housing

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
8.8 ft-lbs (12 N·m)
Important Notes
Tighten in a cross pattern to ensure even gasket compression. Convert 106 inch-lbs to ft-lbs
2

Transmission Drain and Fill Plugs

M18 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Use a new sealing washer or O-ring when installing.
3

Transmission Fluid Drain/Fill Plug

M18 x 1.5
Torque Specification
8.8 ft-lbs (12 N·m)
Important Notes
Use a new sealing washer or O-ring when installing. Convert 106 inch-lbs to ft-lbs

Driveshaft Axles

1

Drive Axle/Half Shaft Bolts

M10 x 1.25
Torque Specification
118 ft-lbs (160 N·m)
Important Notes
Tighten evenly in a star pattern to ensure uniform load. Ensure bolt threads are clean and free from damage.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
177 ft-lbs (240 N·m)
Important Notes
Always use a new nut if replacing. Torque with the vehicle on the ground with wheels locked.
3

Propeller/Drive Shaft Bolts

M10 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Tighten in a cross pattern, Ensure drive shaft is properly aligned before torquing.
4

Drive Shaft Center Support Bearing Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten bolts evenly. Ensure bearing is centered before torquing.

Differential Transfercase

1

Differential Drain/Fill Plug

M18 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Use a new sealing washer or O-ring when installing.
2

Transfer Case Drain/Fill Plug

M18 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Use a new sealing washer or O-ring when installing.
3

Rear Differential Cover Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Tighten evenly in a crisscross pattern, use a new gasket for installation.
4

Transfer Case Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Tighten bolts evenly, alternating sides to prevent misalignment.
5

Differential Mounting Bolts

M12 x 1.75
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Tighten evenly to prevent misalignment. Ensure differential is properly aligned before torquing.

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure coil is seated correctly before tightening. Over-tightening can damage the coil or threads.

Starting System

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the starter motor is flush against the engine block or transmission before tightening. Check for proper engagement with the flywheel.

Charging System

1

Alternator Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the alternator is correctly seated on the mounting bracket. Verify correct belt alignment after installation.

Battery System

1

Battery Terminal Nuts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Do not over-tighten the terminal nuts to avoid damage to the battery posts. Ensure terminals are clean and free of corrosion before tightening.

Engine Control

1

Engine Control Module (ECM/PCM) Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value. Ensure module is flush with its mounting surface. Do not over-tighten to prevent damage to the module or its mounting points.

Grounding System

1

Ground Strap/Cable Bolts (Chassis/Engine)

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
This is an estimated value. Ensure ground points are clean and free of corrosion before tightening. Proper grounding is critical for reliable electrical system operation.

Sensor Mounting

1

Sensor Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value. Ensure the sensor is seated correctly before tightening. Over-tightening can damage the sensor or threads. Ensure sensor housing is grounded.

Wiring Harness

1

Wiring Harness Connector Bracket Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value. Ensure the bracket is flush against the mounting surface. Over-tightening can damage the bracket or mounting surface.

Relay And Fuse Boxes

1

Relay Box Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the relay box bracket is flush with mounting surface. Verify that all electrical connectors are securely attached after tightening.
2

Fuse Box Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the fuse box bracket is flush with mounting surface. Verify that all electrical connections are secure after tightening.

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust System

1

Exhaust Manifold to Cylinder Head Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure mating surfaces are clean and free of debris. Apply even torque. Use a new gasket if necessary.
2

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure proper alignment of the exhaust pipe. Use new gaskets. Tighten evenly to avoid leaks.
3

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Inspect flanges for damage. Use new gaskets and tighten evenly to ensure a leak-free seal.
4

Muffler to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Check for proper fit and alignment. Use new gaskets if needed. Tighten evenly to prevent leaks.

Egr System

1

EGR Valve Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper alignment of the EGR valve. Use a new gasket for optimal sealing. Apply even torque.

Oxygen Sensors

1

Upstream O2 Sensor

M18 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure the sensor threads are clean and lubricated with anti-seize compound. Do not overtighten. Verify correct sensor type for application. This torque spec is a *generic estimate* for most O2 sensors, and the correct torque spec *must* be verified for the specific sensor used.
2

Downstream O2 Sensor

M18 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure the sensor threads are clean and lubricated with anti-seize compound. Do not overtighten. Verify correct sensor type for application. This torque spec is a *generic estimate* for most O2 sensors, and the correct torque spec *must* be verified for the specific sensor used.

Intake System Sensors

1

Mass Airflow (MAF) Sensor Mounting Screws

M5 x 0.8
Torque Specification
6.67 ft-lbs (9 N·m)
Important Notes
Do not overtighten, as this sensor is often mounted to plastic. This value is a *generic estimate* and the correct torque spec *must* be verified for the specific sensor used. Use a properly calibrated torque wrench.
2

Manifold Absolute Pressure (MAP) Sensor Mounting Bolts

M5 x 0.8
Torque Specification
6.67 ft-lbs (9 N·m)
Important Notes
Do not overtighten, as this sensor is often mounted to plastic. This value is a *generic estimate* and the correct torque spec *must* be verified for the specific sensor used. Use a properly calibrated torque wrench.
3

Intake Air Temperature (IAT) Sensor Mounting

M5 x 0.8
Torque Specification
6.67 ft-lbs (9 N·m)
Important Notes
Do not overtighten, as this sensor is often mounted to plastic. This value is a *generic estimate* and the correct torque spec *must* be verified for the specific sensor used. Use a properly calibrated torque wrench.

Evap System

1

EVAP Purge Valve Mounting Bolts/Screws

M5 x 0.8
Torque Specification
7.42 ft-lbs (10 N·m)
Important Notes
Do not overtighten, as the valve body can be plastic and easily cracked. This value is a *generic estimate* and the correct torque spec *must* be verified for the specific sensor used. Use a properly calibrated torque wrench.
2

Fuel Tank Pressure Sensor Mounting Bolts/Screws

M5 x 0.8
Torque Specification
7.42 ft-lbs (10 N·m)
Important Notes
Do not overtighten, as the sensor body can be plastic. This value is a *generic estimate* and the correct torque spec *must* be verified for the specific sensor used. Use a properly calibrated torque wrench.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold

1

Exhaust Manifold/Header to Cylinder Head

M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure mating surfaces are clean. Tighten in a star pattern to evenly distribute pressure.

Exhaust Piping

1

Exhaust Pipe to Exhaust Manifold/Header Flange

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure proper alignment of the flanges. Use new gaskets for optimal sealing. Tighten evenly.
2

Catalytic Converter to Exhaust Pipe Flange

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper alignment of the flanges. Use new gaskets for optimal sealing. Tighten evenly.
3

Muffler to Exhaust Pipe Flange

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper alignment of the flanges. Use new gaskets for optimal sealing. Tighten evenly.
4

Exhaust Flange Spring Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value. Torque should allow for some movement at the joint. Do not over tighten, as this will prevent the springs from performing their function. If the springs appear to be coil-bound before desired torque, back off.
5

Exhaust Clamps

M8 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value. Tighten to achieve a proper seal, but do not crush the pipes. Re-torque after a short drive.

Exhaust Hangers

1

Exhaust Hanger Mounting Bolts/Nuts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value. Ensure the hangers are properly aligned and positioned. Do not over-tighten, as this will damage the rubber isolators.
2

Exhaust Hanger Mounting Bolts/Nuts - Rubber Isolator

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value. Ensure the hangers are properly aligned and positioned. Do not over-tighten, as this will damage the rubber isolators.

Oxygen Sensors

1

Oxygen Sensor

M18 x 1.5
Torque Specification
33 ft-lbs (44 N·m)
Important Notes
Typically hand-tighten then 1/4 to 1/2 turn further. Estimated value. Use anti-seize compound on the threads. Do not over tighten, as this will damage the sensor or threads.

Fuel

Torque specifications for Fuel

Fuel Rail

1

Fuel Rail Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Torque these bolts evenly to ensure uniform pressure on the fuel rail.
2

Fuel Injector Retaining Bolts/Screws

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure injector O-rings are properly seated before tightening to avoid leaks. Do not over-tighten.
3

Fuel Pressure Sensor Mounting Bolts/Screws

M5 x 0.8
Torque Specification
5.9 ft-lbs (8 N·m)
Important Notes
Torque sensor bolts to specified value to prevent leaks and sensor failure. This is equivalent to 71 in-lbs.

Fuel Pump

1

Fuel Pump Module Mounting Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the fuel pump module is correctly aligned before tightening bolts. Do not overtighten.
2

Fuel Tank Sending Unit/Module Retaining Ring

Special Threaded Ring
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Use a specialized fuel tank retaining ring tool for tightening. Torque spec is critical for proper sealing.

Fuel Filter

1

Fuel Filter Mounting Bolt/Nut

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure filter bracket is properly aligned before tightening bolts/nuts. Do not overtighten.

Fuel Lines And Connections

1

Fuel Line Clamp Bolts/Screws

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Do not overtighten. Use the proper tool to avoid damaging the clamps. Ensure lines are routed properly before tightening.
2

Steel Fuel Line Fittings (AN/Banjo Bolt)

Varies by fitting size
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
This is an ESTIMATED torque. Always follow the specific torque specifications for the fitting size and material as they vary. Always replace crush washers.
3

Quick Connect Fuel Line Fittings

N/A - Push-to-Connect
Torque Specification
N/A
Important Notes
These fittings do not have a specific torque. They are designed to click into place. Ensure they are fully connected and secure. Inspect for proper engagement.

Fuel Filler

1

Fuel Filler Neck Mounting Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Tighten bolts evenly to avoid deforming the filler neck. This is equivalent to 89 inch-lbs. Do not overtighten.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure bolts are clean and threads are in good condition. Tighten evenly to prevent compressor misalignment.
2

A/C Line Fittings

Varies by location - Estimated M12 x 1.75 for common lines
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use care when tightening A/C line fittings, over-tightening can damage seals and cause leaks. Always replace O-rings if disturbed.
3

Refrigerant Pressure Sensor

Estimated M10 x 1.0
Torque Specification
9.6 ft-lbs (13 N·m)
Important Notes
Use caution to not over tighten. Clean and inspect threads before installation.

Ac Condenser

1

A/C Condenser Mounting Bolts

M6 x 1.0
Torque Specification
8.8 ft-lbs (12 N·m)
Important Notes
These bolts are typically smaller and are in an area that requires care to not over tighten to avoid damage.

Ac Evaporator

1

A/C Evaporator Housing Bolts

M5 x 0.8
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
These are typically smaller bolts that secure a plastic housing, and over-tightening can cause stripping or damage.
2

A/C Expansion Valve Mounting Bolts

M5 x 0.8
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Ensure the expansion valve is seated correctly before tightening. Over tightening can damage the valve and cause leaks.

Ac Blower

1

A/C Blower Motor Mounting Bolts

M5 x 0.8
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
These bolts secure the blower motor to the HVAC case. Ensure the blower motor is seated correctly before tightening.

Hvac Control

1

HVAC Control Module/Actuator Mounting Bolts

M4 x 0.7
Torque Specification
5.9 ft-lbs (8 N·m)
Important Notes
These are small bolts used for securing electronics and actuators. Be very careful with torque to not damage.

Suspension

Torque specifications for Suspension

Front Suspension

1

Strut Top Mounting Bolts

M10 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
These bolts secure the top of the strut assembly to the vehicle's chassis. Ensure proper alignment during installation.
2

Strut-to-Knuckle Bolts

M14 x 1.5
Torque Specification
100 ft-lbs (135 N·m)
Important Notes
These bolts connect the lower portion of the strut to the steering knuckle. These bolts are critical for securing the strut assembly. Estimated value.
3

Upper Control Arm Bolts

M12 x 1.75
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
These bolts secure the upper control arm to the vehicle frame or subframe. Proper torque is essential for maintaining suspension geometry.
4

Lower Control Arm Bolts

M14 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
These bolts secure the lower control arm to the vehicle frame or subframe. Ensure correct orientation during installation.
5

Lower Control Arm Ball Joint to Steering Knuckle Bolt/Nut

M12 x 1.75
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
This bolt and nut secures the ball joint to the steering knuckle. Critical for suspension integrity. Estimated value.
6

Ball Joint Nut

M14 x 1.5
Torque Specification
103 ft-lbs (140 N·m)
Important Notes
This nut secures the ball joint stud to the steering knuckle or control arm. Proper torque is critical for smooth steering and safety.
7

Tie Rod End Nut

M12 x 1.25
Torque Specification
46 ft-lbs (62 N·m)
Important Notes
This nut secures the tie rod end to the steering knuckle. Accurate torque is vital for steering precision.
8

Sway Bar Link Nut

M10 x 1.5
Torque Specification
52 ft-lbs (70 N·m)
Important Notes
These nuts secure the sway bar links to the sway bar and strut/control arm. Proper torque ensures effective sway bar operation.
9

Sway Bar Bracket Bolts

M10 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
These bolts mount the sway bar brackets to the frame/subframe. Do not overtighten, as this can distort the bushings. Estimated value.

Rear Suspension

1

Rear Strut Top Mounting Bolts

M10 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
These bolts secure the top of the rear strut assembly to the vehicle's chassis. Ensure proper alignment during installation.
2

Rear Strut-to-Knuckle Bolts

M14 x 1.5
Torque Specification
100 ft-lbs (135 N·m)
Important Notes
These bolts connect the lower portion of the rear strut to the steering knuckle. These bolts are critical for securing the strut assembly. Estimated value.
3

Rear Upper Control Arm Bolts

M12 x 1.75
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
These bolts secure the rear upper control arm to the vehicle frame or subframe. Proper torque is essential for maintaining suspension geometry.
4

Rear Lower Control Arm Bolts

M14 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
These bolts secure the rear lower control arm to the vehicle frame or subframe. Ensure correct orientation during installation.
5

Rear Lower Control Arm Ball Joint to Steering Knuckle Bolt/Nut

M12 x 1.75
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
This bolt and nut secures the rear ball joint to the steering knuckle. Critical for suspension integrity. Estimated value.
6

Rear Sway Bar Link Nut

M10 x 1.5
Torque Specification
52 ft-lbs (70 N·m)
Important Notes
These nuts secure the rear sway bar links to the sway bar and strut/control arm. Proper torque ensures effective sway bar operation.
7

Rear Sway Bar Bracket Bolts

M10 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
These bolts mount the sway bar brackets to the frame/subframe. Do not overtighten, as this can distort the bushings. Estimated value.

Wheel Speed Sensors

1

Wheel Speed Sensor Mounting Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (9 N·m)
Important Notes
These bolts mount the wheel speed sensor. It is critical that these bolts not be over tightened as damage to the sensor will occur.

Troubleshooting Guide

Common issues, diagnostic steps, and prevention guidelines

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

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

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 are the recommended torque values for the various components on my 2018-Present Buick Enclave?

Refer to the comprehensive torque specifications table in the vehicle service manual for specific torque values based on component and application. Ensure you use the correct torque wrench and follow Buick's specified tightening procedures for optimal performance and safety.

Q2

Can I use any type of torque wrench for my vehicle?

No, it's crucial to utilize a properly calibrated torque wrench designed for automotive applications, meeting or exceeding industry standards. Using an inaccurate or unsuitable torque wrench can compromise the integrity of the fasteners and potentially lead to safety hazards.

Q3

What are the potential consequences of over-tightening or under-tightening bolts?

Over-tightening bolts can cause thread damage, bolt stretching, and component failure. On the other hand, under-tightening can lead to loose connections, premature wear, and potential safety concerns. Always adhere to the specified torque values and use the correct tools and techniques to ensure proper tightening.

Q4

How often should I check the torque on critical components?

It's generally recommended to follow the maintenance schedule outlined in your vehicle's owner's manual for torque inspections and adjustments. Critical components subjected to high stress or vibration may require more frequent checks, especially after significant repairs or replacements.

Q5

What are some common torque-related mistakes to avoid?

Avoid using impact wrenches or power tools for final tightening, as they can easily over-tighten bolts. Never substitute torque values from a different vehicle or manual. Always refer to the specific torque specifications provided for your Buick Enclave model and consult a qualified mechanic if you have any doubts.

Q6

IS it necessary to use threadlocker or anti-seize compounds when tightening bolts?

In certain applications, threadlocker or anti-seize compounds may be specified to prevent loosening or corrosion. Refer to the service manual for specific guidelines and recommendations on when and where to use these compounds.

Environmental Considerations

Temperature, humidity, and seasonal effects on torque specifications

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

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

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 Enclave.

  • Digital display for accurate readings
  • Audible alarm when target torque IS reached
  • Multiple units (Nm, ft-lb, in-lb)
  • Reversible ratcheting mechanism
Learn more
Service Procedures
Technical Service Bulletins

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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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  • Always follow the manufacturer's recommended procedures and safety precautions.
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About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

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