Buick Encore 2020-present 1.3L Engine Bolt Torque Specifications & Fastener Values
Buick Encore 2020-present

Buick Encore 2020-present 1.3L Engine Bolt Torque Specifications

Detailed torque specifications for all major bolts on the 1.3L engine of the 2020-Present Buick Encore. This includes cylinder head bolts, connecting rod bolts, main bearing cap bolts, and more.

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

Cylinder Head

Fasteners related to securing the cylinder head to the engine block, maintaining proper compression and combustion seal.

1

Cylinder Head Bolts

M10 x 1.5
Important Notes
Tighten bolts in a specific sequence. Refer to the service manual for the correct tightening sequence. Angle tightening is typically required after the initial torque but is not included here.

Crankshaft And Rotating Assembly

Fasteners related to the crankshaft, connecting rods, and flywheel, critical components of the engine's rotating assembly.

1

Main Bearing Bolts

M10 x 1.25
Torque Value
61 ft-lbs (83 N·m)
Important Notes
Tighten main bearing bolts in a specific sequence. Refer to the service manual for the correct tightening sequence.
2

Connecting Rod Nuts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Tighten connecting rod nuts evenly. Check for free rotation of the connecting rod after tightening. Usually requires an angular tightening step not shown.
3

Flywheel Bolts

M8 x 1.25
Torque Value
55 ft-lbs (75 N·m)
Important Notes
Tighten flywheel bolts in a star pattern to ensure even pressure.
4

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Hold the crankshaft while tightening to prevent rotation. Usually requires an angle-based tightening after initial torque.

Engine Block And Oil System

Fasteners related to the engine block's structure, oil pan, and oil filtration components.

1

Oil Pan Bolts

M6 x 1.0
Torque Value
8.8 ft-lbs (12 N·m)
Important Notes
Tighten oil pan bolts in a crisscross pattern to ensure even seal pressure.
2

Oil Filter Cap

M20 x 1.5 (estimated)
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Tighten with new o-ring. Torque value estimated based on similar sized components.
3

Oil Filter Housing Bolt

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Tighten evenly to prevent leaks. Torque is appropriate for this size of bolt.
4

Oil Drain Plug Bolt

M14 x 1.5
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Always use a new crush washer on the oil drain plug.

Valve Train

Fasteners associated with the valve cover, camshaft, and rocker arm components.

1

Valve Cover Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Tighten valve cover bolts in a crisscross pattern. Inch-lbs converted to foot-lbs.
2

Camshaft Sprocket Bolt

M10 x 1.25
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Hold the camshaft while tightening to prevent rotation. Ensure proper alignment of timing marks before tightening.
3

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Tighten rocker arm bolts evenly.

Timing System

Fasteners associated with timing chain or belt and the tensioning components.

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Value
21 ft-lbs (28 N·m)
Important Notes
Ensure correct timing tensioner position before tightening.

Intake And Exhaust System

Fasteners related to the intake manifold, throttle body, exhaust manifold, and EGR valve.

1

Throttle Body Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Tighten throttle body bolts evenly to ensure a proper seal. Inch-lbs converted to foot-lbs.
2

Intake Manifold Bolts

M8 x 1.25
Torque Value
8.8 ft-lbs (12 N·m)
Important Notes
Tighten intake manifold bolts in a crisscross pattern. Inch-lbs converted to foot-lbs.
3

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Value
26 ft-lbs (35 N·m)
Important Notes
Tighten exhaust manifold bolts evenly. Use new gasket.
4

EGR Valve Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Tighten EGR valve bolts evenly to ensure proper sealing.

Fuel System

Fasteners related to the fuel rail, injectors, and associated components.

1

Fuel Rail Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Tighten fuel rail bolts evenly. Inch-lbs converted to foot-lbs.
2

Fuel Injector Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Tighten fuel injector bolts evenly. Inch-lbs converted to foot-lbs.

Ignition System

Fasteners related to spark plugs and ignition coils.

1

Spark Plugs

M14 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure spark plugs are properly threaded by hand before tightening. Use a torque wrench to ensure proper compression.
2

Ignition Coil Bolt

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Tighten ignition coil bolt evenly. Inch-lbs converted to foot-lbs.

Cooling System

Fasteners associated with the water pump, thermostat housing, and related cooling system components.

1

Water Pump Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Tighten water pump bolts evenly.
2

Water Pump Pulley Bolts

M6 x 1.0
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Tighten water pump pulley bolts evenly.
3

Thermostat Housing Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Tighten thermostat housing bolts evenly. Inch-lbs converted to foot-lbs.

Sensors And Electronics

Fasteners related to the various engine sensors and electronic components.

1

Knock Sensor Bolt

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Tighten knock sensor bolt carefully. Do not overtighten.
2

Camshaft Position Sensor Bolt

M6 x 1.0
Torque Value
5.9 ft-lbs (8 N·m)
Important Notes
Tighten camshaft position sensor bolt carefully. Inch-lbs converted to foot-lbs.
3

Crankshaft Position Sensor Bolt

M6 x 1.0
Torque Value
5.9 ft-lbs (8 N·m)
Important Notes
Tighten crankshaft position sensor bolt carefully. Inch-lbs converted to foot-lbs.
4

Coolant Temperature Sensor Bolt

M6 x 1.0
Torque Value
8.8 ft-lbs (12 N·m)
Important Notes
Tighten coolant temperature sensor carefully. Inch-lbs converted to foot-lbs.
5

Variable Valve Timing (VVT) Solenoid Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Tighten the VVT solenoid bolts evenly. Inch-lbs converted to foot-lbs.

Engine Mounts

Fasteners related to the engine mounts that secure the engine to the chassis.

1

Engine Mount Bolts (to engine block)

M12 x 1.75
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Ensure proper alignment of the engine mount before tightening. Torque is appropriate for this bolt size.

Turbocharger

Fasteners related to the turbocharger unit, oil feed, and drain lines. Only included if applicable.

1

Turbocharger Mounting Bolts

M10 x 1.5
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Tighten turbocharger mounting bolts in a crisscross pattern. Torque is appropriate for this bolt size.
2

Turbocharger Oil Feed Line Bolts (Banjo Bolt)

M12 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Always use new copper washers on both sides of the banjo fitting. Torque is appropriate for this size of bolt.
3

Turbocharger Oil Drain Line Bolts (Flange bolts)

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Tighten evenly using a crisscross pattern. Torque is appropriate for this bolt size.

Accessory Drive

Fasteners related to the accessory drive system, including the belt tensioner and idler pulley.

1

Serpentine/Accessory Drive Belt Tensioner Bolt

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure correct tensioner position before tightening.
2

Drive Belt Idler Pulley Bolt

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Tighten idler pulley bolt evenly.

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

Why are torque specifications important?

Correct torque specifications are crucial to ensure proper clamping force between components. Over-tightening can damage bolts, threads, and gaskets, potentially leading to leaks or component failure. Under-tightening can result in joint loosening, leading to vibrations, leaks, and eventual failure. For example, over-tightening the cylinder head bolts on the 1.3L engine could damage the head gasket, causing compression loss and engine damage.

Q2

What type of torque wrench should I use?

It's best to use a calibrated torque wrench, either click-type or digital. Click-type torque wrenches provide an audible and tactile indication when the set torque is reached. Digital torque wrenches offer more precise readings and some even have data logging capabilities. For most fasteners on the 1.3L engine, a 3/8" or 1/2" drive torque wrench is suitable. Never use an impact wrench to tighten to final torque specifications.

Q3

Do torque specs change when using new fasteners?

Generally, torque specifications remain the same regardless of whether the fasteners are new or old unless specifically stated otherwise in the service manual. However, it's always advisable to use new fasteners, especially for critical components like cylinder head bolts, as they can stretch or fatigue over time. For example, using a new set of connecting rod bolts with the 1.3L engine is recommended when performing engine service, and you should follow the specific tightening sequence, even if the torque specs are technically the same.

Q4

How do I handle torque-to-yield (TTY) bolts?

Torque-to-yield (TTY) bolts are designed to stretch during tightening and are typically only intended for one-time use. They need to be replaced when they are removed, and they are typically tightened in stages, with the final tightening angle or turn. For example, many of the 1.3L engine cylinder head bolts and some connecting rod bolts will be TTY, and using the old ones will be bad news.

Q5

What happens if I strip a bolt?

If you strip a bolt thread, it is necessary to repair it using a thread repair kit (e.g. Helicoil) or in some instances replace the component entirely. Attempting to retighten a stripped bolt will not provide proper clamping force and could lead to further issues. For example, if you strip an intake manifold bolt on the 1.3L, it will need to be repaired before being able to reinstall the intake manifold.

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

Torque Wrench (1/4" Drive)

A 1/4" drive torque wrench is essential for accurately applying torque to smaller fasteners commonly found on the 1.3L engine.

  • Accurate torque measurement
  • Small size for tight spaces
Learn more

Torque Wrench (3/8" Drive)

A 3/8" drive torque wrench is needed for applying torque to larger fasteners used in various locations on the engine.

  • Wider torque range
  • Durable construction
Learn more

Socket Set (1/4" Drive, Metric)

A comprehensive 1/4" drive metric socket set is required to fit the various bolt head sizes.

  • Multiple sizes for various fasteners
  • Durable construction
Learn more

Socket Set (3/8" Drive, Metric)

A comprehensive 3/8" drive metric socket set is required to fit the various larger bolt head sizes.

  • Multiple sizes for various fasteners
  • Durable construction
Learn more

Extension Bars

Extension bars help reach recessed fasteners.

  • Various lengths for hard to reach areas
  • Durable construction
Learn more

Universal Joint

A universal joint allows for socket access at an angle.

  • Allows socket access at various angles
  • Durable construction
Learn more
Service Procedures

Cylinder Head Bolt Torque Procedure (1.3L Engine)

This procedure outlines the steps to properly torque the cylinder head bolts on the 1.3L engine.

  • Clean all bolt threads and the cylinder head mating surface.
  • Install new cylinder head bolts.
  • Torque all bolts to 25 Nm (18 lb ft) in the proper sequence.
  • Using an angle meter, torque all bolts an additional 60 degrees in the proper sequence.
  • Using an angle meter, torque all bolts an additional 40 degrees in the proper sequence.
View full procedure

Intake Manifold Bolt Torque Procedure (1.3L Engine)

This procedure outlines the steps to properly torque the intake manifold bolts on the 1.3L engine.

  • Clean all bolt threads and the intake manifold mating surface.
  • Install intake manifold and hand tighten all bolts.
  • Torque all bolts to 10 Nm (89 lb in) in the proper sequence.
View full procedure

Exhaust Manifold Bolt Torque Procedure (1.3L Engine)

This procedure outlines the steps to properly torque the exhaust manifold bolts on the 1.3L engine.

  • Clean all bolt threads and the exhaust manifold mating surface.
  • Install exhaust manifold and hand tighten all bolts.
  • Torque all bolts to 20 Nm (15 lb ft) in the proper sequence.
View full procedure

Engine Oil Pan Bolt Torque Procedure (1.3L Engine)

This procedure outlines the steps to properly torque the engine oil pan bolts on the 1.3L engine.

  • Clean all bolt threads and the oil pan mating surface.
  • Install the oil pan and hand tighten all bolts.
  • Torque all bolts to 10 Nm (89 lb in) in the proper sequence.
View full procedure

Camshaft Bearing Cap Bolt Torque Procedure (1.3L Engine)

This procedure outlines the steps to properly torque the camshaft bearing cap bolts on the 1.3L engine.

  • Clean all bolt threads and the bearing cap mating surface.
  • Install the camshaft bearing caps and hand tighten all bolts.
  • Torque all bolts to 10 Nm (89 lb in) in the proper sequence.
View full procedure
Technical Service Bulletins

Engine Oil Leak from Oil Pan Area

2021-05-15

Some 2020-2021 models may experience oil leaks from the oil pan area due to inadequate bolt torque during assembly.

2020-2021 Buick Encore

Resolution: Verify all oil pan bolts are torqued to 10 Nm. Reapply threadlocker as needed. If leak persists, replace gasket and torque bolts to spec.

Cylinder Head Bolt Retorque Procedure Update

2022-02-28

Revised cylinder head bolt torque procedure to improve gasket sealing on the 1.3L engine

2020-2022 Buick Encore

Resolution: Follow revised torque procedure for cylinder head bolts: 25 Nm (18 lb ft), 60 degrees, 40 degrees. Replace bolts if reused.

Intake Manifold Gasket Leakage

2023-11-01

Some 2020-2023 1.3L engine models may exhibit intake manifold vacuum leaks due to improper torque of manifold bolts.

2020-2023 Buick Encore

Resolution: Ensure all intake manifold bolts are torqued to 10 Nm (89 lb in). Replace gasket if necessary.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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