Buick Enclave 2008-2017 Suspension Bolt Torque Specifications & Fastener Values
Buick Enclave 2008-2017

Buick Enclave 2008-2017 Suspension Bolt Torque Specifications

Detailed torque specifications for all suspension bolts on the 2008-2017 Buick Enclave, including front and rear suspension components. Provides crucial information for proper installation and safety.

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

Front Suspension

Torque specifications for the front suspension components of a 2008-2017 Buick Enclave, including struts, control arms, and related hardware.

1

Upper Strut Mounting Bolts

M10 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Torque bolts evenly, ensuring the strut is seated correctly in the strut tower.
2

Lower Strut to Knuckle Bolts

M14 x 1.5
Torque Value
85 ft-lbs (115 N·m)
Important Notes
These bolts are critical for suspension and steering integrity. Ensure proper alignment before tightening.
3

Control Arm to Frame/Subframe Bolts

M14 x 2.0
Torque Value
70 ft-lbs (95 N·m)
Important Notes
Tighten these bolts with the vehicle at ride height to prevent binding of bushings.
4

Ball Joint Nut

M12 x 1.75
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Ensure the ball joint stud is properly seated before tightening.
5

Tie Rod End Nut

M12 x 1.5
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Tighten to proper torque to secure the tie rod end to the steering knuckle.
6

Sway Bar Link Nut (to Sway Bar)

M10 x 1.5
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Torque the nut to secure the sway bar link to the sway bar.
7

Stabilizer Bar Link to Strut/Control Arm Bolts

M12 x 1.75
Torque Value
65 ft-lbs (88 N·m)
Important Notes
These bolts connect the sway bar link to the strut or control arm. Ensure proper alignment before tightening.

Sway Bar

Torque specifications for sway bar mounting hardware.

1

Sway Bar Bracket Bolts

M10 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Ensure the sway bar is centered and the bushings are seated properly before tightening.

Rear Suspension

Torque specifications for rear suspension components, including the rear axle beam or trailing arms.

1

Rear Axle Beam/Trailing Arm Mounting Bolts

M14 x 2.0
Torque Value
85 ft-lbs (115 N·m)
Important Notes
Tighten with the vehicle at ride height. These bolts are critical for rear suspension integrity.

Steering Knuckle

Torque specifications for bolts securing the steering knuckle, if applicable.

1

Steering Knuckle/Spindle Mounting Bolts (estimated)

M14 x 2.0
Torque Value
110 ft-lbs (150 N·m)
Important Notes
This is an estimated value based on the size and application of similar bolts. Always refer to the official service manual for the exact value. This is assuming that the knuckle bolts to a strut or other suspension part. If it bolts to a control arm, this torque may be lower.

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 is using the correct torque specifications important?

Using the correct torque specifications is crucial for the safety and performance of your vehicle's suspension system. Over-tightening bolts can lead to thread damage, bolt stretching, and component failure, while under-tightening can cause loosening, rattling, and instability, potentially leading to accidents. Properly torqued bolts ensure components are clamped together with the designed force, maintaining structural integrity.

Q2

What type of wrench should I use for tightening suspension bolts?

A calibrated torque wrench is essential for accurately tightening suspension bolts. Using a regular wrench can result in inaccurate torque values, leading to either over or under-tightening. Use a suitable socket that fits the bolt heads snugly, avoiding slippage and damage. A click-type torque wrench is recommended for its ease of use and clear indication of reaching the set torque.

Q3

Should I use new bolts when replacing suspension components?

It's highly recommended to use new bolts when replacing suspension components, especially critical components like control arms, struts, and steering knuckles. Many suspension bolts are torque-to-yield (TTY), which means they stretch slightly during tightening and should not be reused. Reusing these bolts can lead to them failing prematurely. Also, new bolts usually come with fresh thread-locking compounds, aiding in securing them.

Q4

What if I don't have a torque wrench?

While it is strongly advised to have a torque wrench for this work, if you don't have access to one, you can try to tighten the bolts as snug as possible, then take the vehicle to a professional shop as soon as possible for correct torquing. Under torquing is not as severe as over-torquing, therefore if you err, err on the side of under-torquing. **DO NOT DRIVE IF YOU SUSPECT THE BOLTS ARE SERIOUSLY UNDER-TORQUED** It’s more important to make sure the components are securely fastened for safety reasons and to reduce further wear, even if they aren’t at their peak torqued state.

Q5

Should I apply threadlocker to suspension bolts?

While many suspension bolts are pre-coated with a thread-locking compound, it is a good practice to apply a new dab of medium-strength (typically blue) threadlocker during reinstallation, particularly if you used new bolts. This helps prevent them from loosening due to vibration. Do not use permanent (red) threadlocker as you may have to remove the bolts later.

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 inch Drive)

A calibrated torque wrench is essential for accurately tightening suspension bolts to the manufacturer's specified torque. A 1/2 inch drive is common for many suspension components.

  • Click-type mechanism
  • Range of 20-150 ft-lbs or greater
  • Clearly readable scale
Learn more

Torque Wrench (3/8 inch Drive)

A 3/8 inch drive torque wrench may be needed for smaller bolts or bolts in tighter areas.

  • Click-type mechanism
  • Range of 5-80 ft-lbs or greater
  • Clearly readable scale
Learn more

Socket Set (Metric)

A comprehensive metric socket set is necessary for fitting the various bolt head sizes used in the suspension system.

  • Sizes ranging from 10mm to 24mm
  • 6-point sockets for better grip
  • Deep and shallow well options
Learn more

Extension Bars

Extension bars of varying lengths provide additional reach to access difficult to reach bolts.

  • Multiple lengths
  • 3/8 and 1/2 inch drive options
Learn more

Breaker Bar

A breaker bar will aid in loosening stubborn bolts.

  • 1/2 inch drive
  • Long handle for increased leverage
Learn more
Service Procedures

Front Strut/Shock Absorber Bolt Torque Procedure

This procedure outlines the steps to properly torque the bolts for the front strut/shock assembly of the Buick Enclave.

  • 1. Locate and identify the upper strut mounting bolts.
  • 2. Hand tighten the upper strut mounting bolts in a crisscross pattern.
  • 3. Using the proper torque wrench and socket, torque the upper strut mounting bolts to the manufacturer's specification.
  • 4. Locate and identify the lower strut mounting bolts connecting to the steering knuckle.
  • 5. Hand tighten the lower strut mounting bolts.
  • 6. Using the proper torque wrench and socket, torque the lower strut mounting bolts to the manufacturer's specification.
  • 7. Double check torque values with a second pass.
View full procedure

Rear Shock Absorber Bolt Torque Procedure

This procedure outlines the steps to properly torque the bolts for the rear shock absorber assembly of the Buick Enclave.

  • 1. Locate and identify the upper shock absorber mounting bolts.
  • 2. Hand tighten the upper shock absorber mounting bolts.
  • 3. Using the proper torque wrench and socket, torque the upper shock absorber mounting bolts to the manufacturer's specification.
  • 4. Locate and identify the lower shock absorber mounting bolts.
  • 5. Hand tighten the lower shock absorber mounting bolts.
  • 6. Using the proper torque wrench and socket, torque the lower shock absorber mounting bolts to the manufacturer's specification.
  • 7. Double check torque values with a second pass.
View full procedure

Control Arm Bolt Torque Procedure

This procedure outlines the steps to properly torque the control arm bolts of the Buick Enclave.

  • 1. Locate and identify the control arm mounting bolts.
  • 2. Hand tighten the control arm mounting bolts.
  • 3. Using the proper torque wrench and socket, torque the control arm mounting bolts to the manufacturer's specification.
  • 4. Ensure the vehicle is at ride height for final torque if required.
  • 5. Double check torque values with a second pass.
View full procedure
Technical Service Bulletins

Steering Knuckle Bolt Corrosion Issues

2012-05-15

Some 2008-2012 Enclaves have exhibited corrosion around the lower steering knuckle bolts, potentially causing binding or squeaking noises. This bulletin addresses proper inspection and bolt replacement.

2008-2012

Resolution: Inspect knuckle bolts for corrosion, replace with new bolts if necessary, and apply anti-seize compound. Torque to spec.

Rear Suspension Noise Diagnosis

2014-11-20

A clunking or popping sound from the rear suspension may be due to improperly torqued or damaged bolts on the rear control arms. Inspection and re-torquing to specification is recommended.

2008-2014

Resolution: Inspect all rear control arm bolts and torque to specification, replacing any damaged bolts or bushings as needed.

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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