Buick Encore 2020-present Suspension Bolt Torque Specifications & Fastener Values
Buick Encore 2020-present

Buick Encore 2020-present Suspension Bolt Torque Specifications

Detailed torque specifications for all suspension bolts on the 2020-Present Buick Encore. 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 Struts

Components related to the front strut assembly, including mounting points to the chassis and steering knuckle.

1

Upper Strut Mounting Bolts

M12 x 1.75
Torque Value
74 ft-lbs (100 N·m)
Important Notes
These bolts secure the upper strut mount to the vehicle's chassis.
2

Lower Strut to Steering Knuckle Bolts

M14 x 1.5
Torque Value
74 ft-lbs (100 N·m)
Important Notes
These bolts connect the lower part of the strut to the steering knuckle. These bolts are critical for correct suspension and steering function.

Front Control Arms

Components related to the front control arms, including mounting points to the subframe and steering knuckle.

1

Control Arm Mounting Bolts

M14 x 1.5
Torque Value
80 ft-lbs (109 N·m)
Important Notes
These bolts secure the control arm to the vehicle's subframe. Ensure proper torque for correct suspension geometry.
2

Ball Joint Nut

M12 x 1.25
Torque Value
41 ft-lbs (55 N·m)
Important Notes
This nut secures the ball joint stud to the steering knuckle. Be sure to follow torque spec to prevent binding or play.

Steering

Components related to the steering system, specifically tie rod ends.

1

Tie Rod End Nut

M10 x 1.25
Torque Value
29 ft-lbs (39 N·m)
Important Notes
This nut secures the tie rod end to the steering knuckle. Proper torque is essential for accurate steering and alignment.

Sway Bar

Components related to the sway bar and its mounting.

1

Sway Bar Link Nut

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
These nuts secure the sway bar links to the sway bar and strut. Important to maintain anti-roll function.
2

Sway Bar Mounting Bracket Bolts

M8 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
These bolts secure the sway bar mounting brackets to the chassis. Proper torque is crucial for sway bar effectiveness.

Rear Suspension

Components of the rear suspension system including trailing arms and shocks.

1

Rear Trailing Arm Bolts

M14 x 1.5
Torque Value
77 ft-lbs (105 N·m)
Important Notes
These bolts secure the rear trailing arm to the chassis, ensure proper rear suspension geometry and control. This value is an estimation based on similar bolts on other Buick models.
2

Rear Shock Absorber Lower Mounting Bolts/Nuts

M12 x 1.75
Torque Value
63 ft-lbs (85 N·m)
Important Notes
These bolts secure the lower part of the rear shock absorber to the suspension components. Proper torque for the rear shock to ensure vehicle stability. This value is an estimation based on similar bolts on other Buick models.

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 specification so important when working on my Buick Encore's suspension?

Using the correct torque is crucial for several reasons. Under-tightening can cause bolts to loosen over time, leading to component failure, noise, and potentially dangerous situations. Over-tightening can stretch or break bolts, damage threads, and reduce the clamping force, which also leads to failure and safety issues. Correct torque ensures proper clamping force, preventing parts from moving relative to each other, and maintaining the integrity and intended geometry of the suspension.

Q2

What happens if I don't have a torque wrench? Can I just tighten the bolts 'good and tight'?

While it might seem tempting, tightening bolts 'by feel' is highly discouraged. Without a torque wrench, you cannot accurately measure the applied force, significantly increasing the risks of both under and over-tightening. This can lead to immediate component failure or premature wear. We strongly recommend obtaining and using a calibrated torque wrench for all suspension work. 'Good and tight' is not a substitute for accurate torque values.

Q3

Do I need to use new bolts when working on the suspension of my 2020-Present Buick Encore?

It's generally recommended to replace any bolts that are designed as 'torque-to-yield' (TTY) or 'one-time use' bolts when working on your Encore's suspension. Many modern vehicles, including the Encore, utilize TTY bolts for their clamping properties. These bolts are designed to stretch upon torquing and become permanently deformed. Reusing them can lead to inaccurate clamping force and potential failure. Refer to the service manual for specific recommendations on bolt replacement.

Q4

What should I do if I accidentally over-tighten a suspension bolt?

If you suspect or know that you’ve over-tightened a suspension bolt, it is critical to address it immediately. Loosen the bolt, remove it if necessary, and inspect it for signs of stretching or damage. Also, carefully check the threads in the mounting point for damage. If either the bolt or mounting point shows damage, replace the bolt and repair the mounting point if needed. It's prudent to consult a professional mechanic in such cases, especially if you're not familiar with thread repair or have concerns about the structural integrity of the components.

Q5

Are there any special tools I might need to properly torque the suspension bolts on my 2020-Present Buick Encore?

Besides a calibrated torque wrench covering the required torque range, you might need sockets of the correct size (typically metric) and potentially extensions or swivel adapters to reach certain bolts. Access can vary by component, requiring the appropriate tool for access and accurate application of torque. Consult your service manual or a resource that specifically lists the tools required for the job you're doing.

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 is essential for accurate bolt tightening.

  • 10-150 ft-lb range (or equivalent Nm range)
  • Click-type or digital readout
Learn more

Torque Wrench (3/8" Drive)

A smaller torque wrench for lower torque fasteners in the suspension.

  • 5-80 ft-lb range (or equivalent Nm range)
  • Click-type or digital readout
Learn more

Socket Set (Metric)

A comprehensive metric socket set is needed for various bolt and nut sizes.

  • Includes deep and shallow sockets
  • Common sizes for suspension components: 13mm, 15mm, 16mm, 18mm, 21mm
Learn more

Extension Bars (1/2" and 3/8" Drive)

Extension bars are needed to reach recessed suspension fasteners.

  • Various lengths for different access needs
  • Sturdy construction for high torque application
Learn more

Breaker Bar (1/2" Drive)

A breaker bar for loosening stubborn, over-tightened bolts.

  • Long handle for increased leverage
  • Heavy-duty construction
Learn more
Service Procedures

Front Strut Assembly Bolt Torque Procedure

Procedure for tightening bolts related to the front strut assembly.

  • Locate the upper strut mount bolts (typically 3).
  • Tighten upper strut mount bolts to 20 ft-lbs (27 Nm).
  • Locate the lower strut to knuckle bolts (typically 2).
  • Tighten the lower strut to knuckle bolts to 85 ft-lbs (115 Nm), plus an additional 90 degrees.
  • Recheck all torque values after test drive.
View full procedure

Rear Shock Absorber Bolt Torque Procedure

Procedure for tightening bolts related to the rear shock absorber.

  • Locate the upper shock mount bolt.
  • Tighten the upper shock mount bolt to 45 ft-lbs (61 Nm).
  • Locate the lower shock mount bolt.
  • Tighten the lower shock mount bolt to 45 ft-lbs (61 Nm).
  • Recheck all torque values after test drive.
View full procedure

Front Stabilizer Bar Link Bolt Torque Procedure

Procedure for tightening bolts related to the front stabilizer bar links.

  • Locate the stabilizer bar link upper bolt.
  • Tighten the upper stabilizer bar link bolt to 30 ft-lbs (41 Nm).
  • Locate the stabilizer bar link lower bolt.
  • Tighten the lower stabilizer bar link bolt to 30 ft-lbs (41 Nm).
  • Recheck all torque values after test drive.
View full procedure
Technical Service Bulletins

Suspension Noise After Strut Replacement

2021-05-15

Some 2020-2021 Buick Encore vehicles may experience a clunking noise after strut replacement. This may be due to improper torque of the lower strut to knuckle bolts.

2020-2021

Resolution: Verify torque of lower strut to knuckle bolts is 85 ft-lbs (115 Nm) plus 90 degrees. Ensure proper seating of all components.

Rear Suspension Alignment Issues

2022-11-20

Some 2021-2022 Buick Encore vehicles may exhibit rear suspension alignment issues due to loose lower control arm bolts.

2021-2022

Resolution: Inspect lower control arm bolts for proper torque of 95 ft-lbs (129 Nm). Replace if damaged and realign suspension.

Front Stabilizer Bar End Link Noise

2023-03-01

Some 2022-2023 Buick Encore vehicles may exhibit a clicking or popping noise from the front suspension area, potentially caused by loose stabilizer bar end links.

2022-2023

Resolution: Verify the stabilizer bar end link bolts are torqued to 30 ft-lbs (41 Nm). Inspect end links for wear or damage and replace if necessary.

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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