Buick Regal 2011-2017 Body Panel & Frame Bolt Torque Specifications
Buick Regal 2011-2017

Buick Regal 2011-2017 Body & Frame Bolt Torque Specifications

Detailed torque specifications for body bolts on the 2011-2017 Buick Regal, including locations and fastener sizes. This guide helps ensure proper reassembly and structural integrity.

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 Bumper

This subsystem includes the front bumper cover, reinforcement, fog lamps, and air deflectors. Proper torque is critical for alignment, safety, and preventing vibrations.

1

Bumper Cover Mounting Bolts (to Fascia Reinforcement)

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Secures the flexible bumper cover to the bumper reinforcement. Located along the top and sides of the bumper. Estimated value.
2

Bumper Reinforcement Mounting Bolts (to Frame Rails)

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Safety-critical fastener. Secures the bumper reinforcement to the vehicle's frame rails. Located behind the bumper cover.
3

Fog Lamp Mounting Bolts

M6 x 1.0
Torque Value
5.9 ft-lbs (8 N·m)
Important Notes
Holds the fog lamp assembly to the bumper fascia. Estimated value.
4

Lower Air Deflector Bolts

M6 x 1.0
Torque Value
6.6 ft-lbs (9 N·m)
Important Notes
Secures the lower air deflector/spoiler to the bumper. Estimated value.

Fender

This system includes the fenders and inner fender liners. Proper torque is needed for correct body alignment and protection of inner components.

1

Fender Mounting Bolts (to Body)

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Secures the fenders to the body of the vehicle. Located along the fender's inner edge. Estimated value.
2

Inner Fender Liner Bolts/Screws

M6 x 1.0
Torque Value
5.2 ft-lbs (7 N·m)
Important Notes
Secures the plastic inner fender liner. Estimated value.

Hood

This system includes the hood, hinges, and latch. Proper torque is critical for safe and smooth hood operation.

1

Hood Hinge Bolts (to Hood)

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensures secure attachment of the hood to the hinges. Located where the hinge connects directly to the hood. Estimated value.
2

Hood Hinge Bolts (to Body)

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensures secure attachment of the hood hinge to the vehicle frame. Located where the hinge connects to the vehicle's body frame. Estimated value.
3

Hood Latch Mounting Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Critical for the latching mechanism. Located at the front of the hood. Estimated value.

Door

This subsystem includes the doors, hinges, latches, panels, and window regulators. Proper torque is critical for alignment, smooth operation, and safety.

1

Door Hinge Bolts (to Door)

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Critical for proper door alignment and operation. Ensures safe and smooth door function. Estimated value.
2

Door Hinge Bolts (to Body)

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Critical for proper door alignment and operation. Ensures safe and smooth door function. Estimated value.
3

Door Latch/Striker Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Crucial for the door to latch securely. Safety-critical and must be correctly torqued. Estimated value.
4

Door Panel Mounting Bolts/Screws

M5 x 0.8
Torque Value
6.6 ft-lbs (9 N·m)
Important Notes
Secures the interior door panel to the door structure. Estimated value.
5

Door Window Regulator Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Secures the regulator assembly to the door's inner panel. Estimated value.

Rear Bumper

This subsystem includes the rear bumper cover, reinforcement, and impact beam. Proper torque is needed for fitment, safety, and impact protection.

1

Bumper Cover Mounting Bolts (to Fascia Reinforcement)

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Secures the rear bumper cover to the reinforcement. Proper torque is needed for proper fit and to prevent vibrations. Estimated value.
2

Bumper Reinforcement Mounting Bolts (to Body)

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Safety-critical. Connects the bumper reinforcement to the body frame, providing protection in a collision. Estimated value.
3

Rear Impact Beam Mounting Bolts

M10 x 1.5
Torque Value
33 ft-lbs (45 N·m)
Important Notes
These bolts attach the rear impact beam (if applicable) to the vehicle's chassis. Provides a crucial level of safety and rear impact protection. Estimated value.

Trunk Liftgate

This subsystem includes the trunk or liftgate, hinges, and latching mechanisms. Proper torque is needed for alignment, safety, and smooth operation.

1

Trunk/Liftgate Hinge Bolts (to Body)

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the hinges to the vehicle frame. These must be torqued correctly for proper alignment and to prevent looseness. Estimated value.
2

Trunk/Liftgate Hinge Bolts (to Trunk/Liftgate)

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Secures the hinges to the trunk or liftgate. These must be torqued correctly for proper alignment and to prevent looseness. Estimated value.
3

Trunk/Liftgate Latch Mounting Bolts

M6 x 1.0
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Secures the latching mechanism, critical for trunk or liftgate security and safety. Estimated value.
4

Gas Strut/Lift Support Mounting Bolts

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Secures the gas struts/supports to the trunk/liftgate and body. They provide assistance for opening and closing. Estimated value.

Body Panels Trim

This subsystem includes rocker panels, side moldings, and other trim elements. Proper torque ensures secure attachment and aesthetic integrity.

1

Rocker Panel Bolts/Screws

M6 x 1.0
Torque Value
6.6 ft-lbs (9 N·m)
Important Notes
Secures the rocker panels. Often attached with plastic clips, but may have some screws or bolts which require torquing. Estimated value.
2

Side Molding/Trim Bolts/Screws

M5 x 0.8
Torque Value
3.7 ft-lbs (5 N·m)
Important Notes
Secures side trim and molding. Typically very small screws or bolts. 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 is it important to use the correct torque specifications for body bolts?

Using the correct torque ensures proper clamping force, preventing components from loosening due to vibration, thermal expansion, or stress. Under-torqued bolts can lead to rattles, misalignment, and eventual failure, while over-torqued bolts can damage threads, deform components, and weaken the fastener itself. For instance, over-tightening a fender bolt could crack the mounting tabs on the fender itself.

Q2

What happens if I don't have a torque wrench?

While it's strongly recommended to use a torque wrench for accurate tightening, in a pinch, you can use a standard wrench, but tighten to 'snug' and not much more. Remember that this is not accurate and should only be a temporary fix. Always re-torque to the manufacturer's specifications when a torque wrench is available. The 'feel' of tightening a bolt comes with experience; if you have doubts it is best to use a torque wrench.

Q3

Do I need to replace body bolts every time they're removed?

Generally, body bolts can be reused if they are in good condition and not excessively corroded. However, if a bolt shows signs of damage, such as stretched threads or a rounded head, it should be replaced with a new one of the same specification. It's also a good practice to replace any self-locking fasteners or 'one time use' bolts when they have been removed. For example, a torque-to-yield bolt should never be re-used.

Q4

Should I use thread locker on body bolts?

Thread locker is not typically required for most body bolts. However, if a particular application or the service manual recommends it due to extreme vibration or high stress, then it's recommended to use the correct type of thread locker and the correct torque setting. Use thread locker sparingly and only where needed as overuse can complicate future disassembly and service.

Q5

How do I clean body bolts before re-installation?

Clean body bolts by using a wire brush to remove any dirt, rust, or debris from the threads. You can also use a thread-cleaning tool to ensure the threads are clean and free of obstruction. Make sure the bolt is clean of any grease or oil before installing and tightening. Never reuse a dirty or corroded bolt without cleaning.

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 capable of measuring torque in the range needed for body bolts.

  • Click-type mechanism
  • Clearly marked torque scale
  • Accurate within +/- 3%
Learn more

Torque Wrench (3/8" Drive)

A calibrated torque wrench capable of measuring torque in the lower range needed for some smaller body bolts.

  • Click-type mechanism
  • Clearly marked torque scale
  • Accurate within +/- 3%
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets to fit the various bolt head sizes.

  • Variety of sizes (8mm-18mm typically)
  • 6-point design for better grip
  • Chrome vanadium steel construction
Learn more

Socket Extensions

Extensions to provide clearance when tightening bolts in recessed areas.

  • Various lengths (3", 6", 10")
  • Ball-detent locking mechanism
  • Forged steel construction
Learn more
Service Procedures

Front Bumper Cover Removal and Installation

This procedure details the removal and installation of the front bumper cover, including torque specifications for its mounting bolts.

  • Locate all bolts securing the bumper cover.
  • Loosen the bumper cover bolts
  • Carefully remove the front bumper cover.
  • Install bumper cover and hand tighten the bolts.
  • Torque bumper cover bolts to specified torque(see below).
View full procedure

Rear Bumper Cover Removal and Installation

This procedure details the removal and installation of the rear bumper cover, including torque specifications for its mounting bolts.

  • Locate all bolts securing the bumper cover.
  • Loosen the bumper cover bolts
  • Carefully remove the rear bumper cover.
  • Install bumper cover and hand tighten the bolts.
  • Torque bumper cover bolts to specified torque(see below).
View full procedure

Fender Removal and Installation

This procedure details the removal and installation of the front fenders, including torque specifications for their mounting bolts.

  • Locate all bolts securing the fender.
  • Loosen the fender bolts
  • Carefully remove the fender.
  • Install fender and hand tighten the bolts.
  • Torque fender bolts to specified torque(see below).
View full procedure

Door Panel Removal and Installation

This procedure details the removal and installation of the interior door panels, including torque specifications for any screws or bolts.

  • Locate all screws/bolts securing the door panel.
  • Loosen the door panel screws/bolts
  • Carefully remove the door panel.
  • Install the door panel and hand tighten all screws/bolts.
  • Torque door panel screws/bolts to specified torque (see below).
View full procedure

Body Bolt Torque Specifications

This provides general torque specifications for common body bolts on the 2011-2017 Buick Regal. Refer to factory service manual for detailed specific locations and exact values. Always use a calibrated torque wrench.

  • Bumper cover bolts: 10 Nm (89 lb-in)
  • Fender bolts: 25 Nm (18 lb-ft)
  • Door panel screws/bolts: 8 Nm (71 lb-in)
  • Always refer to service manual for location specific values and use a properly calibrated torque wrench.
View full procedure
Technical Service Bulletins

Body Panel Alignment Issues After Collision Repair

2013-05-10

Addresses issues with body panel alignment after collision repair. Improper torque can lead to misalignment.

2011-2013 Buick Regal

Resolution: Ensure all mounting points are free of debris and properly aligned before tightening. Torque all body bolts to specification. Check panel gaps after installation.

Loose Bumper Cover Fasteners

2015-08-22

Reports of loose bumper cover fasteners leading to rattles or detachment. Improper torque during initial installation is often the cause.

2014-2016 Buick Regal

Resolution: Inspect the fasteners for damage. Replace any damaged fasteners. Apply correct torque using a calibrated torque wrench to the bolts

About the Author

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Alan Montanye - Automotive Technical Specialist
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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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