Acura RDX 2007-2012 Suspension Bolt Torque Specifications & Fastener Values
Acura RDX 2007-2012

Acura RDX 2007-2012 Suspension Bolt Torque Specifications

Detailed torque specifications for suspension bolts on the first-generation 2007-2012 Acura RDX, 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 front suspension components.

1

Strut/Shock Absorber Mounting Bolts

M12 x 1.25
Torque Value
28 ft-lbs (38 N·m)
Important Notes
These bolts secure the strut/shock absorber assembly to the vehicle's chassis or the knuckle/hub assembly. Ensure proper torque for suspension integrity and alignment.
2

Front Strut Top Mount Nuts

M10 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
These nuts secure the top of the strut assembly to the vehicle's chassis. Estimated value based on typical bolt size, verify with service manual for accuracy.
3

Control Arm Bolts

M14 x 1.5
Torque Value
47 ft-lbs (64 N·m)
Important Notes
These bolts secure the control arms to the vehicle's frame or subframe. Critical for proper suspension geometry.
4

Ball Joint Nut

M12 x 1.25
Torque Value
40 ft-lbs (54 N·m)
Important Notes
This nut secures the ball joint stud. Ensure a secure connection to prevent play.
5

Steering Knuckle to Strut/Shock Bolt

M14 x 1.5
Important Notes
This bolt connects the steering knuckle to the strut/shock assembly. Estimated torque value, verify with service manual for accuracy. This requires torque-to-yield method.
6

Tie Rod End Nut

M12 x 1.25
Torque Value
36 ft-lbs (49 N·m)
Important Notes
This nut secures the tie rod end stud. Critical for steering input and alignment.
7

Sway Bar Link Nut

M10 x 1.25
Torque Value
35 ft-lbs (47 N·m)
Important Notes
These nuts secure the sway bar link. Critical for proper sway bar function.

Rear Suspension

Torque specifications for rear suspension components.

1

Rear Shock Absorber Lower Mounting Bolt

M12 x 1.25
Torque Value
40 ft-lbs (54 N·m)
Important Notes
This bolt connects the lower part of the shock absorber to the lower control arm. Estimated value based on similar bolts, confirm via service manual.
2

Rear Trailing Arm Bolt

M14 x 1.5
Important Notes
This bolt connects the trailing arm to the chassis. Estimated torque value, verify with service manual for accuracy. This requires torque-to-yield method.

Subframe

Torque specifications for subframe components.

1

Subframe Mounting Bolts

M14 x 1.5
Important Notes
These bolts secure the subframe to the vehicle body. Torque to yield application, replace bolts if removed. Estimated torque value, verify with service manual for accuracy.

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 are torque specifications important for suspension bolts?

Correct torque specifications are critical for suspension bolts because they ensure proper clamping force. Under-tightening can lead to components loosening over time, causing instability, noise, and even component failure. Over-tightening can stretch or break bolts and damage components, also causing failure. Following the manufacturer's torque spec helps maintain the intended handling characteristics and prevents accidents.

Q2

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

Using a torque wrench is essential for achieving the correct torque. Guessing or tightening by feel can be inaccurate. Without a torque wrench, you risk over or under-tightening, which can have dangerous consequences on your vehicle's handling and safety, including premature wear of bushings and components.

Q3

Do I need to replace bolts after removing them?

It's generally recommended to replace torque-to-yield (TTY) bolts, often used in suspension systems, after removing them. These bolts are designed to stretch slightly when tightened, and re-using them can compromise their clamping force. Even if bolts aren't TTY, replacing them after multiple removals is best practice.

Q4

What is the best way to apply torque to bolts?

Always use a calibrated torque wrench. Before tightening, clean the bolt and threaded hole. Tighten bolts in a sequence if specified, usually in a star pattern. Apply torque gradually, and do not use power tools. It's a best practice to double-check the torque to avoid mistakes. Example: for a control arm bolt, tightening a little at a time on each of the bolts in a designated order prevents bending and uneven stress.

Q5

Can I reuse a nyloc nut on the suspension components?

Nyloc nuts are designed for one-time use. Reusing them can lead to the nylon insert losing its locking effectiveness. While tempting, it's a good practice to replace them to maintain the locking mechanism. A lose nut can cause components to fail prematurely and may cause a dangerous situation.

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 accurately tightening suspension bolts to the manufacturer's specifications.

  • Click-type mechanism
  • Torque range appropriate for suspension bolts (e.g., 20-150 ft-lbs)
Learn more

Torque Wrench (3/8" drive)

A smaller torque wrench can be used for lower torque specifications in the suspension system.

  • Click-type mechanism
  • Torque range appropriate for smaller bolts (e.g., 5-80 ft-lbs)
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets is required to fit all the different sizes of suspension bolts and nuts.

  • Variety of sizes from 10mm to 22mm
  • Deep and shallow socket options
Learn more

Socket Extensions

Extensions are needed to reach recessed bolts and nuts.

  • Various lengths
  • 1/2" and 3/8" drive options
Learn more
Service Procedures

Front Strut Assembly Installation

Procedure for installing a complete front strut assembly, including torque specifications for all mounting hardware.

  • 1. Loosen the wheel lug nuts. Raise and support the vehicle securely using jack stands.
  • 2. Remove the front wheel.
  • 3. Disconnect the ABS sensor wire bracket from the strut.
  • 4. Remove the brake line bracket from the strut.
  • 5. Remove the sway bar end link from the strut.
  • 6. Support the steering knuckle to prevent it from pulling away when the strut is removed.
  • 7. Remove the two lower strut mounting bolts and nuts.
  • 8. Remove the three upper strut mounting nuts.
  • 9. Carefully remove the old strut assembly.
  • 10. Install the new strut assembly, taking care to align the mounting studs.
  • 11. Install and torque the three upper strut mounting nuts to 36 ft-lbs.
  • 12. Install and torque the two lower strut mounting bolts and nuts to 80 ft-lbs.
  • 13. Reinstall the sway bar end link and torque to 43 ft-lbs.
  • 14. Reconnect the brake line bracket.
  • 15. Reconnect the ABS sensor wire bracket.
  • 16. Reinstall the front wheel. Lower vehicle and torque wheel lug nuts to 80 ft-lbs.
  • 17. Check alignment after installation.
View full procedure

Rear Shock Absorber Replacement

Procedure for replacing the rear shock absorbers including required torque specs.

  • 1. Loosen the wheel lug nuts. Raise and support the vehicle securely using jack stands.
  • 2. Remove the rear wheel.
  • 3. Support the lower control arm to prevent it from dropping when the shock is removed.
  • 4. Remove the upper shock mounting bolt and nut.
  • 5. Remove the lower shock mounting bolt and nut.
  • 6. Remove the old shock absorber.
  • 7. Install the new shock absorber.
  • 8. Install and torque the lower shock mounting bolt and nut to 47 ft-lbs.
  • 9. Install and torque the upper shock mounting bolt and nut to 33 ft-lbs.
  • 10. Reinstall the rear wheel. Lower vehicle and torque wheel lug nuts to 80 ft-lbs.
View full procedure

Front Lower Control Arm Replacement

Procedure for replacing the front lower control arm, including torque specs for all hardware.

  • 1. Loosen the wheel lug nuts. Raise and support the vehicle securely using jack stands.
  • 2. Remove the front wheel.
  • 3. Support the steering knuckle to prevent it from pulling away.
  • 4. Remove the ball joint pinch bolt.
  • 5. Separate the ball joint from the steering knuckle.
  • 6. Remove the front lower control arm front mounting bolt and nut.
  • 7. Remove the rear lower control arm mounting bolt and nut.
  • 8. Remove the old control arm.
  • 9. Install the new lower control arm.
  • 10. Install and torque the rear lower control arm bolt to 80 ft-lbs.
  • 11. Install and torque the front lower control arm bolt to 80 ft-lbs.
  • 12. Reconnect the ball joint to the steering knuckle and tighten to 47 ft-lbs.
  • 13. Reinstall the wheel and torque lug nuts to 80 ft-lbs.
  • 14. Lower the vehicle.
  • 15. Check the alignment.
View full procedure
Technical Service Bulletins

Front Suspension Clunking Noise

2009-07-15

Some 2007-2009 RDX models may experience a clunking noise from the front suspension. This can be caused by loose strut mounting nuts or sway bar end link bolts.

2007-2009

Resolution: Inspect and properly torque all front strut and sway bar end link mounting hardware. Refer to the service manual for correct torque specifications. If the noise persists replace sway bar end links and strut upper mounts.

Rear Suspension Squeaking Noise

2011-03-20

Some 2010-2012 RDX models may experience a squeaking noise from the rear suspension, particularly during cold weather. This noise is often due to the rear shock absorber bushings or mounting hardware.

2010-2012

Resolution: Inspect and lubricate the rear shock absorber bushings. Ensure that the mounting bolts are correctly torqued to specification. If the noise continues, replace the rear shock absorbers and bushings.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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