Acura RLX 2014-2020 Suspension Bolt Torque Specifications & Fastener Values
Acura RLX 2014-2020

Acura RLX 2014-2020 Suspension Bolt Torque Specifications

Detailed torque specifications for all suspension bolts on the 2014-2020 Acura RLX, including front and rear suspension components. This includes control arms, knuckles, sway bar links and mounting hardware.

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 1.75
Torque Value
43 ft-lbs (58 N·m)
Important Notes
Secures the strut/shock absorber to the chassis and/or steering knuckle.
2

Upper Strut Mount Nut

M10 x 1.5
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Secures the top of the strut assembly to the vehicle's chassis. Estimated value based on common nut size.
3

Control Arm Bolts

M14 x 2.0
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Attaches the control arms to the vehicle's frame/subframe.
4

Front Lower Control Arm to Ball Joint Pinch Bolt

M10 x 1.5
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Clamps the ball joint stud to the lower control arm. Estimated value based on common bolt size.
5

Ball Joint Nut

M12 x 1.75
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Secures the ball joint stud to the steering knuckle or control arm.
6

Tie Rod End Nut

M12 x 1.5
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Secures the tie rod end to the steering knuckle.
7

Sway Bar Link Nut

M10 x 1.5
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Attaches the sway bar links to the sway bar and strut or control arm.
8

Sway Bar Mounting Bracket Bolts

M8 x 1.25
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Secures the sway bar mounting brackets to the chassis. Estimated value based on common bolt size.

Rear Suspension

Torque specifications for rear suspension components.

1

Rear Upper Control Arm Bolts/Nuts

M12 x 1.75
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Secures the rear upper control arm to the body/subframe. Estimated value based on common bolt size.
2

Rear Lower Control Arm Bolts/Nuts

M14 x 2.0
Torque Value
60 ft-lbs (81 N·m)
Important Notes
Secures the rear lower control arm to the body/subframe. Estimated value based on common bolt size.
3

Trailing Arm Bolts/Nuts

M14 x 2.0
Torque Value
60 ft-lbs (81 N·m)
Important Notes
Secures the trailing arm to the body/subframe. Estimated value based on common bolt size.

Subframe

Torque specifications for subframe mounting bolts.

1

Subframe Mounting Bolts

M14 x 2.0
Important Notes
Secures the front and rear subframes to the vehicle's chassis. Angle tightening procedure must be followed.

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 proper torque specifications so important for suspension bolts?

Proper torque ensures that bolts are tight enough to securely hold components together but not so tight that they stretch or break. Over-tightening can damage bolts, threads, and components, leading to premature failure. Under-tightening can cause components to loosen, leading to instability, noise, and potential loss of control. Correct torque values maintain the integrity of the suspension system and ensure optimal performance and safety. For example, overtightening a lower control arm bolt could cause it to fail prematurely, leading to a catastrophic suspension failure.

Q2

What tools are recommended for torquing suspension bolts?

A calibrated torque wrench is essential for accurately tightening suspension bolts. Using a wrench that is not calibrated or relying on 'feel' can lead to improper torque values. We recommend using a beam type or click type torque wrench for increased accuracy. Ensure the torque wrench is in good condition and within its calibration period. Also, use the proper size socket for the bolt, and ensure it is in good condition to avoid stripping or rounding the bolt head. Avoid using impact guns unless otherwise specified by the manufacturer.

Q3

Should I use new bolts when reassembling suspension components?

It is generally recommended to use new bolts, especially torque-to-yield (TTY) bolts, when reassembling suspension components. TTY bolts are designed to stretch when torqued, and reusing them can lead to incorrect clamping force and failure. Many manufacturers specify using new bolts for critical suspension points. When in doubt, always replace the bolts. Additionally, consider replacing any bolts that show signs of corrosion or damage, even if they aren't specifically designated as TTY.

Q4

Do I need to lubricate the bolts before tightening?

Generally, suspension bolts should NOT be lubricated unless the manufacturer specifies otherwise. Clean and dry bolts and threads are essential for achieving accurate torque readings. Using lubricants can alter the friction between the threads and lead to over-torquing, causing damage. Always adhere to the specifications provided in the service manual. If lubrication is required it will be specified, along with a specific lubricant, in the service manual.

Q5

What happens if I don't tighten suspension bolts to the correct torque?

Failing to tighten suspension bolts to the correct torque can result in a range of issues. Under-torqued bolts can loosen over time, resulting in noises, poor handling, and accelerated wear on components. This can ultimately lead to component failure and a loss of vehicle control. Over-torqued bolts can damage the bolt, threads, or the mounting component, potentially causing them to weaken, fracture, or fail. Using the correct torque values ensures the longevity, integrity, and safe operation of the suspension system.

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 torque wrench is essential for accurately tightening suspension bolts to the manufacturer's specifications. Both click-type and digital torque wrenches are suitable.

  • Accurate torque measurement
  • Various torque ranges available
  • Durable construction
Learn more

Socket Set

A set of metric sockets, including deep sockets, is necessary to fit various suspension bolt head sizes.

  • Various sizes for different bolts
  • Chrome vanadium steel construction
  • 6-point or 12-point sockets
Learn more

Extension Bars

Extension bars provide access to hard-to-reach suspension bolts, enabling proper torque application.

  • Varying lengths for flexibility
  • Durable steel construction
  • Secure socket connection
Learn more

Universal Joint

A universal joint allows sockets to be used at an angle, improving access to difficult-to-reach bolts.

  • Ability to rotate at various angles
  • Secure socket connection
  • Durable steel construction
Learn more
Service Procedures

Front Strut Bolt Torque Procedure

This procedure details tightening the bolts for the front strut assembly.

  • 1. Identify the upper and lower strut mounting bolts and nuts.
  • 2. Initially tighten all bolts to a snug fit using a socket and ratchet.
  • 3. Use the torque wrench to tighten the upper strut mounting bolts to 49 N·m (36 lb-ft).
  • 4. Tighten the lower strut mounting bolts to 98 N·m (72 lb-ft).
  • 5. Verify the torque of each bolt with a second pass.
View full procedure

Rear Suspension Arm Bolt Torque Procedure

This procedure details the tightening of the various rear suspension arm bolts and nuts.

  • 1. Identify the control arm, lateral link, and trailing arm bolts.
  • 2. Initially tighten all bolts to a snug fit using a socket and ratchet.
  • 3. Tighten the upper control arm bolt to 64 N·m (47 lb-ft).
  • 4. Tighten the lower control arm bolt to 75 N·m (55 lb-ft).
  • 5. Tighten the lateral link bolts to 88 N·m (65 lb-ft).
  • 6. Tighten the trailing arm bolt to 108 N·m (80 lb-ft).
  • 7. Verify the torque of each bolt with a second pass.
View full procedure

Sway Bar End Link Torque Procedure

This procedure outlines tightening the sway bar end link fasteners.

  • 1. Identify the sway bar end link nuts and bolts.
  • 2. Initially tighten all fasteners to a snug fit using a socket and ratchet.
  • 3. Tighten the sway bar end link nuts to 49 N·m (36 lb-ft).
  • 4. Verify the torque of each fastener with a second pass.
View full procedure
Technical Service Bulletins

Suspension Noise Diagnosis and Torque Check

2017-05-10

This bulletin addresses complaints of suspension noise and outlines a torque check procedure for all suspension fasteners. Insufficient torque on suspension bolts can cause knocking or rattling noises. It is critical to check torque using a calibrated wrench.

2014-2017

Resolution: Inspect and re-torque all suspension fasteners to the specified values, replacing any damaged or corroded hardware.

Updated Torque Values for Rear Lower Control Arm

2018-11-15

This bulletin updates the torque value for the rear lower control arm bolt. The previous torque specification was found to be inadequate. The updated value is critical for proper suspension performance and safety.

2014-2019

Resolution: Replace the existing bolt if reused and tighten the rear lower control arm bolt to the updated torque specification of 75 N·m (55 lb-ft).

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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