Buick Envision 2021-present 2.0L Engine Bolt Torque Specifications & Fastener Values
Buick Envision 2021-present

Buick Envision 2021-present 2.0L Engine Bolt Torque Specifications

Comprehensive torque specifications for the 2.0L engine bolts in the 2021-Present Buick Envision, including cylinder head, crankshaft, connecting rod, and other critical fasteners.

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

Specifications for components related to the cylinder head, camshafts, and valve train.

1

Cylinder Head Bolts

M12 x 1.75
Important Notes
Use a new set of bolts. Follow the manufacturer's specified torque sequence. Torque to the specified value, then turn an additional 90 degrees using an angle gauge.
2

Cylinder Head Cover Bolts/Studs

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Tighten in a cross pattern from the center out to ensure even gasket compression. Do not overtighten to avoid damaging the cover.
3

Valve Cover Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten in a criss-cross pattern from the center out to ensure even gasket compression.
4

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Ensure the bolts are properly seated before tightening. Confirm torque applied is to the rocker arm fasteners, not any other hardware.
5

Camshaft Sprocket Bolt

M10 x 1.5
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Use new bolts if specified by the manufacturer. Secure the sprocket before applying final torque. May require a special tool to hold the camshaft.
6

Variable Valve Timing (VVT) Solenoid Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Do not overtighten to avoid damaging the solenoid. Tighten evenly.

Engine Block

Specifications for components mounted to or within the engine block, including the crankshaft, pistons, and related systems.

1

Main Bearing Bolts

M12 x 1.75
Important Notes
Use new bolts if specified. Follow a specific torque sequence, usually from the center outwards. Torque to the specified value, then turn an additional 60 degrees using an angle gauge.
2

Connecting Rod Nuts

M9 x 1.25
Important Notes
Use new nuts. Follow the specified torque sequence. Torque to the specified value, then turn an additional 45 degrees using an angle gauge.
3

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Important Notes
Use a new bolt. Torque to the specified value, then turn an additional 90 degrees using an angle gauge. May require a special tool to hold the crankshaft.
4

Oil Pan Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Tighten in a cross pattern from the center out to ensure even gasket compression. Avoid over-tightening.
5

Oil Filter Housing Bolt

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the filter housing is properly seated before applying final torque. Check the O-ring for damage before installation.
6

Oil Drain Plug Bolt

M14 x 1.5
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Use a new crush washer to ensure a good seal. Do not overtighten to avoid damaging the oil pan threads.

Intake Exhaust

Specifications for components of the intake and exhaust systems, including manifolds, throttle body, and EGR valve.

1

Intake Manifold Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Follow the manufacturer's specified torque sequence. Tighten bolts gradually in a criss-cross pattern from the center out.
2

Throttle Body Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Do not overtighten the bolts to avoid damaging the throttle body. Make sure the throttle body gasket is installed correctly.
3

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Tighten bolts from the center out in a cross pattern to avoid distortion. Use new gaskets if required.
4

EGR Valve Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure that the EGR valve is properly aligned before final tightening. Check the gasket before installation.

Fuel System

Specifications for components of the fuel system, including the fuel rail, injectors, and related parts.

1

Fuel Rail Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Do not overtighten to avoid damage to fuel rail or intake manifold. Ensure the fuel rail is properly seated.
2

Fuel Injector Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Ensure the injectors are properly seated and the O-rings are in good condition.

Cooling System

Specifications for components of the cooling system, including the water pump, thermostat housing, and related parts.

1

Water Pump Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the water pump is properly seated and use a new gasket. Tighten bolts evenly.
2

Water Pump Pulley Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Tighten the bolts evenly to avoid putting the pulley off center.
3

Thermostat Housing Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the thermostat is installed correctly, and use a new gasket. Tighten the bolts evenly.
4

Coolant Temperature Sensor

M12 x 1.5
Torque Value
8 ft-lbs (11 N·m)
Important Notes
This is a hand-tighten plus 1/4 turn or a low specified torque value. Do not overtighten. Estimated value.

Timing System

Specifications for components related to the timing system, including the timing chain tensioner.

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the tensioner is properly aligned before applying final torque.

Accessory Drive

Specifications for components of the accessory drive system, including the belt tensioner and idler pulley.

1

Serpentine/Accessory Drive Belt Tensioner Bolt

M10 x 1.5
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Make sure the tensioner is aligned properly before applying torque.
2

Drive Belt Idler Pulley Bolt

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Ensure that the idler pulley is properly seated before tightening the bolt.

Sensors

Specifications for mounting bolts for various engine sensors.

1

Camshaft Position Sensor Bolt

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Do not overtighten the bolt to avoid damage to the sensor. Ensure the sensor is properly seated.
2

Knock Sensor Bolt

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the sensor is properly seated to the engine block or cylinder head for correct function. Estimated Value.
3

Crankshaft Position Sensor Bolt

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Do not overtighten to avoid damage to the sensor. Ensure the sensor is properly seated.
4

Oil Pressure Sensor

M10 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
This is a hand-tighten plus 1/4 turn or a low specified torque value. Do not overtighten. Estimated value.

Ignition

Specifications for components of the ignition system, including spark plugs and ignition coils.

1

Spark Plugs

M14 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Do not overtighten to avoid damaging the cylinder head threads. Make sure the spark plugs are properly threaded by hand before using the torque wrench.
2

Ignition Coil Bolt

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Do not overtighten to avoid damaging the coil. Make sure it's seated properly before tightening.

Power Steering

Specifications for mounting bolts for the power steering pump.

1

Power Steering Pump Mounting Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure the pump is properly seated on the bracket before tightening.

Forced Induction

Specifications for components related to a forced induction system, including the turbocharger mounting, oil lines, and related bolts.

1

Turbocharger/Supercharger Mounting Bolts

M10 x 1.5
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Estimated Value. Tighten bolts in a cross pattern for even torque distribution.
2

Turbocharger Oil Feed Line and Drain Line Bolt/Fitting

M8 x 1.0
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure new sealing washers are used. Do not overtighten. Estimated value.

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 so important when working on the 2.0L engine?

Torque specifications ensure that fasteners are tightened correctly, providing optimal clamping force and preventing loosening due to vibrations or thermal expansion. Improper torque can lead to component failure, leaks, or even engine damage. For example, overtightening cylinder head bolts can warp the head, leading to coolant or oil leaks and potential engine failure. Undertightening can cause head gasket failure and loss of compression.

Q2

What type of tool should I use to tighten bolts to the specified torque?

A calibrated torque wrench is essential. Using an impact gun or standard wrench to tighten to a 'feel' is highly discouraged. A click-type torque wrench is commonly used, but a digital torque wrench provides more precision and is advisable for critical components like engine internals. Always double check your calibration on your torque wrench yearly.

Q3

Are the torque specs different if I'm replacing a part vs just re-tightening a loosened bolt?

Yes, generally. For many components, new fasteners should be used as they may have been stretched and are not suitable for reuse. When replacing, use the 'new fastener' torque specification and always follow the manufacturers tightening sequence. For components that are removed and re-used you generally follow a tightening procedure outlined in the service manual as this can be different than a new fastener.

Q4

Where can I find the specific torque specifications for my 2021-Present Buick Envision 2.0L engine?

The most reliable source is the official Buick service manual or a reputable online database for your specific vehicle year. These resources will provide detailed information about torque values, bolt tightening sequences, and any other relevant information. Generic manuals are useful for general guidance but do not replace your exact vehicle manual.

Q5

Do I need to replace torque-to-yield (TTY) bolts when working on the 2.0L engine?

Yes, absolutely. Torque-to-yield (TTY) bolts are designed to stretch when tightened, providing clamping force. These bolts should never be reused. Once stretched, they can't provide the required clamping force and often fail if reused. This can be for major components such as cylinder head or main bearing bolts.

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 (1/2" Drive)

A calibrated torque wrench for applying precise torque settings to fasteners.

  • Wide torque range (e.g., 20-150 ft-lbs)
  • Click-type or digital display
  • Accuracy of +/- 3%
Learn more

Torque Wrench (3/8" Drive)

A calibrated torque wrench for applying precise torque settings to smaller fasteners.

  • Torque range (e.g., 5-80 ft-lbs)
  • Click-type or digital display
  • Accuracy of +/- 3%
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets to fit various bolt and nut sizes on the 2.0L engine.

  • Various sizes from 8mm to 19mm
  • 6-point and 12-point options
  • Deep and standard socket depths
Learn more

Extension Bars

Extension bars to reach bolts in recessed or difficult-to-access areas.

  • Various lengths (e.g., 3", 6", 10")
  • 1/2" and 3/8" drive options
  • Made of hardened steel
Learn more

Universal Joint (Swivel)

A universal joint adapter to apply torque at an angle when needed.

  • 1/2" or 3/8" drive options
  • Allows for angled torque application
  • Durable construction
Learn more
Service Procedures

Cylinder Head Bolt Torque Procedure (2.0L Turbo)

Detailed steps for correctly tightening cylinder head bolts on the 2.0L engine.

  • Clean all bolt threads and contact surfaces.
  • Apply a light coat of engine oil to bolt threads.
  • Install all cylinder head bolts and tighten to the first specified torque value using a proper torque sequence.
  • Tighten all bolts again to the second specified torque value following the same sequence.
  • Finally, apply the specified angle tightening sequence if required.
View full procedure

Intake Manifold Bolt Torque Procedure (2.0L Turbo)

Steps for tightening the bolts that attach the intake manifold to the cylinder head on a 2.0L engine

  • Clean all bolt threads and contact surfaces.
  • Install all intake manifold bolts and tighten to the first specified torque value using a proper torque sequence.
  • Tighten all bolts again to the second specified torque value following the same sequence.
View full procedure

Exhaust Manifold Bolt Torque Procedure (2.0L Turbo)

Steps for tightening the bolts that attach the exhaust manifold to the cylinder head on a 2.0L engine

  • Clean all bolt threads and contact surfaces.
  • Install all exhaust manifold bolts and tighten to the first specified torque value using a proper torque sequence.
  • Tighten all bolts again to the second specified torque value following the same sequence.
View full procedure

Engine Mount Bolt Torque Procedure (2.0L Turbo)

Steps for tightening the bolts that attach the engine mounts to the chassis and engine on a 2.0L engine

  • Clean all bolt threads and contact surfaces.
  • Install all engine mount bolts and tighten to the specified torque value using a proper torque sequence.
View full procedure
Technical Service Bulletins

Cylinder Head Bolt Re-Torque Advisory (2.0L Turbo)

2022-05-15

Advisory regarding potential re-torque requirements for cylinder head bolts on 2.0L turbocharged engines due to manufacturing tolerances

2021-2022 Buick Envision

Resolution: Inspect and re-torque cylinder head bolts to the specified value following the recommended sequence during the next scheduled maintenance.

Intake Manifold Gasket Leak Diagnostic Procedure (2.0L Turbo)

2023-01-20

A diagnostic procedure for checking intake manifold gasket leaks, which may require specific torque settings.

2021-2023 Buick Envision

Resolution: Follow the specified diagnostic steps to detect a gasket leak and re-torque manifold bolts to the specified value following the recommended sequence or replace the gasket as necessary.

Updated Engine Mount Bolt Torque Specs (2.0L Turbo)

2024-02-28

Updated torque specifications for engine mount bolts due to reported issues with vibration and movement.

2021-Present Buick Envision

Resolution: Follow the updated engine mount torque specifications to properly secure the engine.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

Automotive Technical Specialist

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