Acura RDX 2013-2018 Suspension Bolt Torque Specifications & Fastener Values
Acura RDX 2013-2018

Acura RDX 2013-2018 Suspension Bolt Torque Specifications

This page provides a comprehensive list of torque specifications for suspension bolts on the 2013-2018 Acura RDX. 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 front suspension components.

1

Strut/Shock Absorber Lower Mounting Bolts

M12 x 1.25
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Secures the strut/shock absorber to the suspension knuckle.
2

Front Strut Top Mount Nuts (Body Side)

M8 x 1.25
Torque Value
33 ft-lbs (45 N·m)
Important Notes
Secures the top of the strut assembly to the vehicle's body. Estimated bolt size.
3

Front Suspension Knuckle To Strut Bolts

M14 x 1.5
Torque Value
76 ft-lbs (103 N·m)
Important Notes
Secures the knuckle to the lower portion of the strut. Estimated bolt size.
4

Front Lower Control Arm Ball Joint Pinch Bolt

M10 x 1.25
Torque Value
50 ft-lbs (68 N·m)
Important Notes
Secures the ball joint to the lower control arm. Estimated bolt size.
5

Control Arm Mounting Bolts

M12 x 1.5
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Secures control arms (upper and lower) to the frame/subframe. Estimated bolt size.
6

Ball Joint Nut

M12 x 1.25
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Secures the ball joint stud to the knuckle or control arm. Estimated bolt size.
7

Tie Rod End Nut

M10 x 1.25
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Secures the tie rod end to the steering knuckle. Estimated bolt size.
8

Sway Bar Link Nut

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Secures the sway bar links to the sway bar and strut/control arm. Estimated bolt size.

Rear Suspension

Torque specifications for rear suspension components.

1

Rear Shock Upper Mounting Bolts (Body Side)

M8 x 1.25
Torque Value
30 ft-lbs (41 N·m)
Important Notes
Secures the top of the rear shock to the body or frame. Estimated bolt size.
2

Rear Shock Lower Mounting Bolts (Control Arm or Knuckle)

M12 x 1.5
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Secures the lower part of the rear shock to the control arm or knuckle. Estimated bolt size.
3

Rear Suspension Knuckle To Strut Bolts

M12 x 1.5
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Secures the knuckle to the lower portion of the strut. Estimated bolt size.

Sway Bar

Torque specifications for sway bar components.

1

Sway Bar Bushing Bracket Bolts

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Secures sway bar bushing brackets to the frame. Estimated bolt size.

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 specification is crucial for ensuring the safe and proper function of your suspension. Under-torquing can lead to bolts loosening, causing noise, instability, and potentially dangerous component failure. Over-torquing can stretch or break bolts, damage threads, and compromise the integrity of the suspension system, leading to costly repairs and safety risks. Imagine a wheel hub bolt that's not tightened enough - it could cause the wheel to wobble or even detach while driving.

Q2

Do I need to use a torque wrench, or can I just tighten them by hand?

A torque wrench is essential for achieving the correct torque specification. Tightening bolts by hand or 'feel' is unreliable and can lead to under or over-torquing. A torque wrench measures the force you apply, ensuring the bolt is tightened to the precise level required. Think of it like following a recipe - you wouldn't randomly add ingredients, would you? The same applies to car repairs. For example, an improperly tightened control arm bolt could alter your vehicle's handling and alignment significantly.

Q3

Should I use new bolts when replacing suspension components?

Yes, it is highly recommended to use new bolts whenever you are replacing suspension components. Most bolts, especially those that are torque-to-yield, are designed to stretch slightly upon being tightened. Reusing old bolts can compromise their integrity and lead to failure. This is especially true for parts under high stress, like the strut bolts or lower control arm bolts. Reusing these can lead to premature failure and potentially cause a loss of control while driving, especially at high speeds.

Q4

What if I don't have the exact torque specifications? What is the risk of guessing?

Never guess torque specifications. Always refer to the Acura service manual for your specific year and model RDX. Guessing can lead to improper tightening as noted before and potentially cause catastrophic failure. Generic torque specs are not reliable and can be dangerous. A scenario where you used a general torque specification could result in a sway bar end link breaking at a high speed, losing control during a sharp turn.

Q5

What does torque-to-yield mean, and does it apply to my RDX's suspension?

Torque-to-yield (TTY) bolts are designed to stretch a specific amount during tightening. This stretch is critical for achieving the correct clamping force. Many critical suspension bolts on the 2013-2018 RDX, particularly those securing the subframe, lower control arms, and struts, are TTY bolts and MUST be replaced when removed. If you are not sure consult the workshop manual. Ignoring the need to replace TTY bolts can cause major suspension issues, similar to the ones described earlier. For example, if you reuse the subframe bolts, it could compromise alignment, and if severe, could cause instability.

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

A calibrated tool for applying precise torque to fasteners.

  • Measures torque in ft-lb or Nm
  • Click-type or digital readout
Learn more

Socket Set

A set of sockets to fit the various bolt and nut sizes used in the suspension system.

  • Includes standard and metric sizes
  • 6-point sockets recommended
Learn more

Extension Bars

Used to access recessed or hard-to-reach bolts.

  • Various lengths available
  • Provides leverage
Learn more

Breaker Bar

Provides extra leverage for loosening stubborn fasteners.

  • Long handle for increased torque
  • Heavy-duty construction
Learn more

Jack Stands

Supports the vehicle safely when working underneath.

  • Adjustable height
  • Rated for vehicle weight
Learn more

Vehicle Jack

Lifts the vehicle for service.

  • Hydraulic or scissor type
  • Rated for vehicle weight
Learn more
Service Procedures

Front Strut Assembly Removal and Installation

Detailed steps for removing and installing the front strut assembly, including relevant torque specifications for reassembly.

  • Loosen lug nuts and lift the vehicle using the jack and secure with jack stands.
  • Remove the wheel.
  • Disconnect the ABS sensor wire and brake hose bracket.
  • Loosen the sway bar end link nut from the strut.
  • Remove the lower strut bolts connecting it to the steering knuckle.
  • Remove the upper strut mount nuts.
  • Remove the strut assembly from the vehicle.
  • Install the new strut assembly and hand tighten upper mount nuts.
  • Install the lower strut bolts and torque to specification.
  • Torque the upper mount nuts to specification.
  • Reconnect ABS sensor wire and brake hose bracket.
  • Reconnect the sway bar end link and torque to specification.
  • Install the wheel and torque lug nuts to specification.
  • Lower the vehicle and test drive.
View full procedure

Rear Shock Absorber Removal and Installation

Detailed steps for removing and installing the rear shock absorber, including relevant torque specifications for reassembly.

  • Loosen lug nuts and lift the vehicle using the jack and secure with jack stands.
  • Remove the wheel.
  • Disconnect any electrical connections attached to the shock absorber.
  • Support the lower control arm with a jack or stand.
  • Remove the upper shock absorber bolts/nuts.
  • Remove the lower shock absorber bolt.
  • Remove the shock absorber.
  • Install the new shock absorber and hand tighten bolts/nuts.
  • Torque the lower shock absorber bolt to specification.
  • Torque the upper shock absorber bolts/nuts to specification.
  • Reconnect any electrical connections.
  • Install the wheel and torque lug nuts to specification.
  • Lower the vehicle and test drive.
View full procedure

Sway Bar End Link Replacement

Detailed steps for replacing the sway bar end links, including relevant torque specifications.

  • Loosen lug nuts and lift the vehicle using the jack and secure with jack stands.
  • Remove the wheel.
  • Loosen the nut on both ends of the sway bar end link.
  • Remove the end link.
  • Install the new end link.
  • Torque the nuts to specification.
  • Install the wheel and torque lug nuts to specification.
  • Lower the vehicle and test drive.
View full procedure
Technical Service Bulletins

Front Suspension Clunking Noise

2016-05-12

Reports of a clunking noise from the front suspension during low speed maneuvers. Possible cause is loose strut mount hardware.

2013-2015

Resolution: Inspect and retorque the strut mount nuts to the specified torque.

Rear Suspension Squeaking Noise

2017-11-20

Reports of a squeaking noise from the rear suspension, especially noticeable during cold weather. This may be caused by binding in the suspension components.

2016-2018

Resolution: Inspect rear shock absorber mounts and bushings, lubricate where necessary and retorque all bolts to specification.

Steering Knuckle Bolt Torque Specification Update

2014-08-01

An updated torque specification is necessary for the lower steering knuckle bolts due to reported loosening issues.

2013-2014

Resolution: Replace lower steering knuckle bolts and torque to new specification. Refer to updated service manual.

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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