Buick Regal 2011-2017 Suspension Bolt Torque Specifications & Fastener Values
Buick Regal 2011-2017

Buick Regal 2011-2017 Suspension Bolt Torque Specifications

Comprehensive torque specifications for all suspension bolts on the 2011-2017 Buick Regal, including 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 various components of the front suspension system, including struts, control arms, and steering components.

1

Strut to Steering Knuckle Bolts

M14 x 2.0
Torque Value
81 ft-lbs (110 N·m)
Important Notes
Critical for connecting the strut to the steering knuckle. Ensure proper alignment before tightening.
2

Strut Mount to Body Bolts

M10 x 1.5
Important Notes
Secures the strut assembly to the body. Use a torque wrench for initial torque and then an angle gauge for final tightening.
3

Sway Bar Link to Strut Bolt/Nut

M10 x 1.5
Torque Value
46 ft-lbs (62 N·m)
Important Notes
Connects the sway bar link to the strut. Ensure correct alignment before tightening.
4

Sway Bar Link to Sway Bar Bolt/Nut

M10 x 1.5
Torque Value
46 ft-lbs (62 N·m)
Important Notes
Connects the link to the sway bar. Ensure correct alignment before tightening.
5

Lower Control Arm Ball Joint Nut

M14 x 1.5
Torque Value
70 ft-lbs (95 N·m)
Important Notes
Secures the ball joint to the steering knuckle. Ensure the joint is properly seated before tightening.
6

Lower Control Arm Front Bushing Bolt

M14 x 2.0
Important Notes
Secures the front of the lower control arm to the vehicle frame. Final tightening is done via an angle specification.
7

Lower Control Arm Rear Bushing Bolt

M14 x 2.0
Important Notes
Secures the rear of the lower control arm to the vehicle frame. Final tightening is done via an angle specification.
8

Tie Rod End Nut

M12 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Secures the tie rod end to the steering knuckle. Ensure correct alignment and tighten carefully.
9

Front Caliper Mounting Bolts

M12 x 1.75
Torque Value
110 ft-lbs (150 N·m)
Important Notes
Secures the caliper to the steering knuckle. Tighten evenly to ensure proper alignment.
10

Front Brake Disc Retaining Bolt

M6 x 1.0
Torque Value
10 ft-lbs (14 N·m)
Important Notes
Secures the brake disc to the hub. This bolt is not essential for braking force. Estimated Value.

Rear Suspension

Torque specifications for various components of the rear suspension system, including shocks, control arms, and sway bar components.

1

Shock Absorber Upper Mount Bolt/Nut

M10 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Secures the shock absorber to the vehicle's body. Ensure proper alignment before tightening.
2

Shock Absorber Lower Mount Bolt/Nut

M12 x 1.75
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Secures the lower end of the shock absorber to the rear suspension knuckle or arm. Ensure proper alignment before tightening.
3

Rear Lower Control Arm (Lateral) Inner Bolt/Nut

M12 x 1.75
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Connects the lower lateral arm to the vehicle's frame. Ensure proper alignment before tightening.
4

Rear Lower Control Arm (Lateral) Outer Bolt/Nut

M12 x 1.75
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Connects the lower lateral arm to the rear wheel carrier. Ensure proper alignment before tightening.
5

Rear Lower Control Arm (Trailing) Front Bolt/Nut

M12 x 1.75
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Secures the trailing arm to the body or subframe. Ensure proper alignment before tightening.
6

Rear Lower Control Arm (Trailing) Rear Bolt/Nut

M12 x 1.75
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Secures the trailing arm to the wheel carrier. Ensure proper alignment before tightening.
7

Rear Upper Control Arm Bolt/Nut

M12 x 1.75
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Connects the upper control arm to the frame and rear knuckle. Ensure proper alignment before tightening.
8

Sway Bar Link to Body Bolt/Nut

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Secures the sway bar link to the vehicle body or subframe. Ensure proper alignment before tightening.
9

Sway Bar Link to Sway Bar Bolt/Nut

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Secures the link to the sway bar itself. Ensure proper alignment before tightening.
10

Rear Brake Caliper Mounting Bolts

M12 x 1.75
Torque Value
110 ft-lbs (150 N·m)
Important Notes
Secures the caliper to the rear suspension. Tighten evenly to ensure proper alignment.
Page 1 of 2

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 important for suspension bolts?

Using the correct torque is critical for suspension safety and performance. Over-tightening can stretch or break bolts, leading to component failure. Under-tightening can cause bolts to loosen, resulting in instability, excessive wear, and potential accidents. Correct torque ensures proper clamping force, maintaining joint integrity and preventing premature wear.

Q2

What happens if I over-tighten a suspension bolt?

Over-tightening can cause several issues. It can stretch the bolt beyond its yield point, permanently weakening it. This can lead to bolt failure, often resulting in sudden and dangerous suspension problems. Over-torquing can also damage the threads in the mating component or cause the material to deform, making it harder to remove or reuse the bolt in the future.

Q3

What happens if I under-tighten a suspension bolt?

Under-tightening a suspension bolt can be just as problematic as over-tightening. It allows components to move or shift, leading to excessive wear, rattling, and handling issues. Under-torqued bolts can loosen over time, eventually causing part failure or making the suspension very unsafe.

Q4

Should I use new bolts when reassembling my suspension?

It is highly recommended to use new bolts, especially for critical suspension components. Many suspension bolts are torque-to-yield (TTY) bolts, designed for single use. Reusing them can compromise their strength and cause them to fail unexpectedly. TTY bolts are often identified by their design or by markings. Consult a repair manual for clarification.

Q5

Do I need to use a torque wrench for suspension work?

Absolutely. A torque wrench is an essential tool for suspension work. Using it ensures that each bolt is tightened to the manufacturer's specified torque. Hand-tightening or estimating torque can lead to unsafe conditions, potential part failure, and incorrect alignment. Using a torque wrench allows you to ensure that you have proper clamping force on every joint. If you don't have a torque wrench, its better to take it to a mechanic that has the proper tools.

Q6

What should I do if a bolt seems to be seized or stripping?

If a bolt is seized, do not force it. Apply penetrating oil, let it soak, and try again. If it still won't come out, additional techniques may be needed. If a bolt starts stripping during removal or installation, stop immediately. Continuing to strip it will lead to additional damage. Depending on the part, you may have to extract a damaged bolt which often means you need to replace the entire component it was in.

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 achieving proper fastener torque. 1/2" drive is recommended for suspension components.

  • Wide torque range (typically 20-200 ft-lbs)
  • Accurate measurement
  • Durable construction
Learn more

Torque Wrench (3/8" Drive)

A calibrated 3/8" drive torque wrench may be necessary for smaller suspension fasteners.

  • Lower torque range (typically 5-80 ft-lbs)
  • Accurate measurement
  • Compact size
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets, both standard and deep well, is required for accessing various suspension bolts and nuts.

  • Variety of sizes (typically 8mm-24mm)
  • Durable construction
  • 6-point sockets preferred for better grip
Learn more

Wrench Set (Metric)

A set of open-end or combination wrenches is needed for holding fasteners when tightening some components.

  • Variety of sizes (typically 8mm - 24mm)
  • Durable construction
  • Offset angle available
Learn more

Extension Bars

Extension bars are needed to reach recessed fasteners.

  • Various lengths
  • Durable construction
Learn more

Jack and Jack Stands

A reliable jack and jack stands are necessary to safely lift and support the vehicle.

  • Proper weight rating
  • Stable base
  • Adjustable height
Learn more
Service Procedures

Front Strut Bolt Torque Procedure

This procedure outlines how to torque the bolts on the front strut assembly to the correct specification.

  • Raise and safely support the vehicle.
  • Locate the front strut bolts (upper and lower)
  • Using a torque wrench, tighten the upper strut bolts to 44 ft-lbs (60 Nm).
  • Using a torque wrench, tighten the lower strut bolts to 81 ft-lbs (110 Nm) for the mounting bolts.
  • Verify all torques are accurate and recheck after 100 miles.
  • Lower the vehicle.
View full procedure

Rear Suspension Control Arm Bolt Torque Procedure

This procedure outlines how to torque the bolts on the rear control arm assembly to the correct specification.

  • Raise and safely support the vehicle.
  • Locate the rear control arm bolts.
  • Using a torque wrench, tighten the rear control arm to frame bolts to 74 ft-lbs (100 Nm).
  • Using a torque wrench, tighten the rear control arm to knuckle bolts to 111 ft-lbs (150 Nm).
  • Verify all torques are accurate and recheck after 100 miles.
  • Lower the vehicle.
View full procedure

Sway Bar Link Bolt Torque Procedure

This procedure outlines how to torque the sway bar link bolts.

  • Raise and safely support the vehicle.
  • Locate the sway bar link bolts.
  • Using a torque wrench, tighten the sway bar link bolts to 66 ft-lbs (90 Nm).
  • Verify all torques are accurate and recheck after 100 miles.
  • Lower the vehicle.
View full procedure
Technical Service Bulletins

Potential for Loose Front Strut Bolts

2014-03-15

Some vehicles may exhibit a knocking noise from the front suspension due to under-torqued strut bolts. This bulletin advises technicians to carefully inspect and re-torque the strut bolts to the correct specification.

2011-2013

Resolution: Inspect and torque front strut bolts to specification (44 ft-lbs/60 Nm upper; 81 ft-lbs/110 Nm lower). Apply thread locker if necessary.

Rear Control Arm Bolt Inspection and Re-Torque

2016-08-20

Vehicles may experience premature rear suspension wear due to improper rear control arm bolt torques. This bulletin mandates inspection and re-torquing to specified values during routine service.

2014-2017

Resolution: Inspect and torque rear control arm bolts to specification (74 ft-lbs/100 Nm to frame; 111 ft-lbs/150 Nm to knuckle). Replace any damaged bolts.

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