Buick Enclave 2018-present Suspension Bolt Torque Specifications & Fastener Values
Buick Enclave 2018-present

Buick Enclave 2018-present Suspension Bolt Torque Specifications

Detailed torque specifications for all suspension bolts on the 2018-Present Buick Enclave. Includes front and rear suspension components.

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 the vehicle, including struts, control arms, and steering linkage.

1

Strut Top Mounting Bolts

M10 x 1.5
Torque Value
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 Value
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 Value
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 Value
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 Value
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 Value
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 Value
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 Value
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 Value
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

Torque specifications for the rear suspension components, similar to the front with rear-specific components.

1

Rear Strut Top Mounting Bolts

M10 x 1.5
Torque Value
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 Value
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 Value
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 Value
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 Value
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 Value
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 Value
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

Torque specification for mounting bolts for wheel speed sensors. These are low torque and require specific attention to prevent damage.

1

Wheel Speed Sensor Mounting Bolts

M6 x 1.0
Torque Value
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

Why is it important to use the correct torque specifications for suspension bolts?

Using the correct torque specifications is crucial for the safe and proper functioning of your Buick Enclave's suspension system. Under-tightening bolts can lead to components loosening, causing instability, excessive wear, and potential failure. Over-tightening can stretch or break bolts, damage threads, and compromise the integrity of suspension parts, resulting in dangerous situations. Torque specifications are designed to ensure the bolt provides the correct clamping force while remaining safe from breakage.

Q2

Can I use a standard wrench instead of a torque wrench?

While a standard wrench can tighten bolts, it's highly discouraged for suspension components. A torque wrench allows you to apply a precisely measured amount of force, ensuring the bolt is tightened to the correct specification. Using a standard wrench relies on guesswork, which can lead to under- or over-tightening, risking safety and component failure. Always use a calibrated torque wrench for suspension work.

Q3

What happens if I over-tighten a suspension bolt?

Over-tightening a suspension bolt can cause several problems. Firstly, it can stretch the bolt beyond its yield point, weakening it and potentially causing it to snap under stress. Secondly, it can damage the threads in the bolt or the component it's threaded into, making it difficult or impossible to remove. Thirdly, it can distort or damage the suspension component itself, leading to premature wear or failure. Always adhere strictly to the specified torque values.

Q4

How often should I check the torque of my suspension bolts?

It's generally recommended to check the torque of suspension bolts after performing any work on the suspension system, like replacing a component. After this initial check, a follow-up check is advisable after around 50-100 miles of driving. This allows bolts to settle and ensures they maintain their specified tightness. Additionally, during routine maintenance, periodic visual checks for loose or damaged bolts are a good practice. If you experience unusual noises or handling issues, a thorough torque check is necessary. Heavy loads, aggressive driving, or off-road driving may warrant more frequent checks.

Q5

Do I need to replace bolts after removing them, even if they look okay?

While it is not always required, it's good practice to replace bolts, especially critical ones like those used on suspension components, particularly when they are torque-to-yield bolts. Torque-to-yield bolts are designed to stretch when tightened and are intended for single-use. Reusing these bolts can lead to them failing prematurely. Even if a standard bolt looks fine, the stretching of the thread or material degradation may have occurred that is not easily detectable, so following service guidelines for bolt replacement is highly advised. Always refer to your Enclave's service manual for recommended bolt replacement guidelines.

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 to accurately tighten fasteners to specified torque values.

  • Accurate torque measurement
  • Click-type or digital display
  • Wide torque range (typically 20-150 ft-lbs)
Learn more

Torque Wrench (3/8" Drive)

A calibrated torque wrench to accurately tighten fasteners to specified torque values.

  • Accurate torque measurement
  • Click-type or digital display
  • Torque range (typically 5-80 ft-lbs)
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets to fit various suspension fasteners.

  • Various sizes for different bolts and nuts
  • 6-point or 12-point design
  • Durable construction
Learn more

Wrench Set (Metric)

A comprehensive set of metric wrenches to fit various suspension fasteners.

  • Various sizes for different bolts and nuts
  • Open-end and box-end designs
  • Durable construction
Learn more

Pry Bar

Used to leverage and align suspension components during assembly.

  • Various lengths and shapes
  • Durable metal construction
  • Comfort grip handle
Learn more
Service Procedures

Front Strut Assembly Installation

Procedure for installing the front strut assembly including torque specifications for all mounting bolts.

  • Loosen lug nuts and raise vehicle on a lift or jack stands.
  • Remove the wheel and tire assembly.
  • Disconnect any brake lines or sensor wires that are connected to the strut assembly.
  • Remove the sway bar end link from the strut.
  • Remove the lower strut mounting bolts.
  • Remove the upper strut mounting bolts.
  • Remove the strut assembly from the vehicle.
  • Install the new strut assembly in the reverse order, making sure to tighten all bolts and nuts to the correct specifications.
  • Verify correct torque for strut mounting bolts (Refer to Torque Chart Below).
  • Verify correct torque for sway bar end links (Refer to Torque Chart Below).
  • Verify correct torque for any disconnected brake lines or sensor wires (Refer to Torque Chart Below).
  • Reinstall the wheel and tire assembly, and tighten lug nuts to correct torque.
  • Lower the vehicle and torque lug nuts again.
View full procedure

Rear Shock Absorber Installation

Procedure for installing the rear shock absorber including torque specifications for all mounting bolts.

  • Loosen lug nuts and raise vehicle on a lift or jack stands.
  • Remove the wheel and tire assembly.
  • Disconnect any sensor wires that are connected to the shock absorber.
  • Remove the upper shock mounting bolts.
  • Remove the lower shock mounting bolts.
  • Remove the shock absorber from the vehicle.
  • Install the new shock absorber in the reverse order, making sure to tighten all bolts and nuts to the correct specifications.
  • Verify correct torque for shock mounting bolts (Refer to Torque Chart Below).
  • Verify correct torque for any disconnected sensor wires (Refer to Torque Chart Below).
  • Reinstall the wheel and tire assembly, and tighten lug nuts to correct torque.
  • Lower the vehicle and torque lug nuts again.
View full procedure

Sway Bar End Link Replacement

Procedure for replacing the front or rear sway bar end links including torque specifications for all mounting bolts.

  • Loosen lug nuts and raise vehicle on a lift or jack stands.
  • Remove the wheel and tire assembly.
  • Remove the sway bar end link nut or bolt on the sway bar side.
  • Remove the sway bar end link nut or bolt on the strut or knuckle side.
  • Remove the sway bar end link from the vehicle.
  • Install the new sway bar end link in the reverse order, making sure to tighten all bolts and nuts to the correct specifications.
  • Verify correct torque for sway bar end links (Refer to Torque Chart Below).
  • Reinstall the wheel and tire assembly, and tighten lug nuts to correct torque.
  • Lower the vehicle and torque lug nuts again.
View full procedure
Technical Service Bulletins

Suspension Clunking Noise in Front End

2020-05-15

A clunking noise may be heard from the front suspension during low-speed maneuvers. This may be caused by loose or worn strut mount hardware. Verify the upper strut mount is torqued correctly.

2018-2020

Resolution: Inspect and tighten strut mount nuts to 65 Nm. Replace strut mounts if wear is excessive.

Rear Suspension Creaking Noise

2021-11-20

A creaking noise from the rear suspension may be heard during suspension movement. This may be caused by excessive wear or looseness of the rear shock mounting bolts.

2019-2021

Resolution: Inspect and tighten the upper and lower shock mount bolts to 100 Nm. Replace worn hardware if necessary.

Sway Bar End Link Premature Wear

2022-03-10

Reports of premature wear or failure of the sway bar end links. This may be caused by incorrect torque specification or faulty components. Verify that all end links are torqued to 75 Nm.

2020-2022

Resolution: Inspect for damage and replace sway bar end links if necessary. Always ensure the correct torque specification is used (75 Nm).

About the Author

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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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  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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