Acura MDX 2007-2013 Suspension Bolt Torque Specifications & Fastener Values
Acura MDX 2007-2013

Acura MDX 2007-2013 Suspension Bolt Torque Specifications

Detailed torque specifications for all suspension bolts on the 2007-2013 Acura MDX, 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 the front suspension components.

1

Front Lower Control Arm to Frame Bolts

M14 x 1.5
Torque Value
75 ft-lbs (102 N·m)
Important Notes
Ensure bolts are properly aligned before tightening.
2

Front Lower Control Arm Ball Joint Nut

M14 x 1.5
Torque Value
43 ft-lbs (58 N·m)
Important Notes
Ensure ball joint is properly seated before tightening.
3

Front Stabilizer Bar Link Nut

M10 x 1.25
Torque Value
28 ft-lbs (38 N·m)
Important Notes
Ensure the stabilizer bar link is correctly positioned.
4

Front Stabilizer Bar Bracket Bolts

M8 x 1.25
Torque Value
17 ft-lbs (23 N·m)
Important Notes
Tighten bolts evenly to prevent bracket distortion.
5

Front Damper Fork Bolts

M14 x 1.5
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Ensure correct orientation of damper fork before tightening.
6

Front Strut Upper Mount Nuts

M8 x 1.25
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Tighten nuts evenly to avoid stressing the mount.
7

Front Drive Shaft to Wheel Hub Nut

M22 x 1.5
Torque Value
181 ft-lbs (245 N·m)
Important Notes
This nut is critical. Use a new nut and torque in a single continuous motion.
8

Front Tie Rod End to Knuckle Nut

M12 x 1.25
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Ensure the tie rod end is properly seated in the knuckle.

Rear Suspension

Torque specifications for the rear suspension components.

1

Rear Lower Control Arm to Frame Bolts

M14 x 1.5
Torque Value
75 ft-lbs (102 N·m)
Important Notes
Ensure bolts are properly aligned before tightening.
2

Rear Lower Control Arm Shock Mount Bolt

M12 x 1.25
Torque Value
54 ft-lbs (73 N·m)
Important Notes
Ensure the shock absorber is correctly aligned with the control arm.
3

Rear Upper Control Arm Inner Bolts

M12 x 1.25
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Ensure the upper control arm is correctly positioned.
4

Rear Upper Control Arm Outer Bolt

M12 x 1.25
Torque Value
54 ft-lbs (73 N·m)
Important Notes
Ensure the upper control arm is correctly positioned to the knuckle.
5

Rear Damper Lower Bolts

M12 x 1.25
Torque Value
54 ft-lbs (73 N·m)
Important Notes
Ensure damper is properly seated on the lower control arm.
6

Rear Damper Upper Mounting Nuts

M10 x 1.25
Torque Value
33 ft-lbs (45 N·m)
Important Notes
Tighten nuts evenly to prevent bracket distortion.
7

Rear Stabilizer Bar Link Nut

M10 x 1.25
Torque Value
28 ft-lbs (38 N·m)
Important Notes
Ensure the stabilizer bar link is correctly positioned.
8

Rear Stabilizer Bar Bracket Bolts

M8 x 1.25
Torque Value
17 ft-lbs (23 N·m)
Important Notes
Tighten bolts evenly to prevent bracket distortion.
9

Rear Knuckle to Upper Control Arm Bolt/Nut

M12 x 1.25
Torque Value
54 ft-lbs (73 N·m)
Important Notes
Ensure correct alignment of knuckle and control arm.
10

Rear Knuckle to Lower Control Arm Bolt/Nut

M14 x 1.5
Torque Value
80 ft-lbs (108 N·m)
Important Notes
Ensure correct alignment of knuckle and control arm.
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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 when working on my Acura MDX's suspension?

Using the correct torque specification is crucial for the safe and proper functioning of your suspension. Over-tightening can stretch or break bolts, damage components, and lead to premature failure. Under-tightening can cause bolts to loosen, leading to instability, noise, and potentially catastrophic suspension failure. Proper torque ensures the correct clamping force, preventing movement and maintaining structural integrity.

Q2

What happens if I over-torque a suspension bolt?

Over-torquing a suspension bolt can cause several issues. The bolt itself can yield or stretch, weakening its structural integrity and making it prone to failure. Over-torquing can also distort the mating surfaces, potentially causing damage to the suspension components. Additionally, it can make the bolt extremely difficult to remove later, sometimes requiring specialized tools or causing further damage during removal.

Q3

What happens if I under-torque a suspension bolt?

Under-torquing a suspension bolt will not provide sufficient clamping force. This can lead to the bolt loosening over time due to vibration and stress, resulting in suspension noise, excessive movement, and accelerated wear. In extreme cases, an under-torqued bolt could completely detach, leading to a dangerous loss of control and potential accident. For example, a loose lower control arm bolt could result in misalignment and erratic handling.

Q4

Should I use new bolts when reassembling my MDX suspension?

It's generally recommended to use new bolts when reassembling suspension components. Many suspension bolts are torque-to-yield (TTY) bolts, meaning they are designed to stretch slightly when properly torqued, and should not be reused. Reusing TTY bolts may result in improper clamping force or bolt failure. Even if bolts are not TTY, they can suffer from corrosion or wear over time, so using new bolts is often the safest and most reliable practice.

Q5

Do I need to use any special lubricants when installing suspension bolts?

Yes, certain bolts may require a specific lubricant to ensure accurate torque readings and prevent seizing. Often, an anti-seize compound is used on parts exposed to the elements to prevent corrosion. Always refer to your Acura MDX service manual for recommendations on specific bolts, as applying the wrong lubricant or none at all can alter the required torque and the bolt's functionality. For example, torque values are typically specified for dry, clean bolts unless otherwise stated in the service manual.

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-inch drive)

A calibrated torque wrench is essential for accurately tightening suspension bolts to the manufacturer's specifications. A 1/2-inch drive is recommended for most suspension components.

  • Accurate torque application
  • Audible click when target torque is reached
Learn more

Torque Wrench (3/8-inch drive)

A 3/8-inch drive torque wrench is useful for smaller suspension fasteners and accessing tighter areas.

  • Good for lower torque settings
  • Smaller size for tighter spaces
Learn more

Socket Set (Metric)

A comprehensive metric socket set, including deep sockets, is necessary to fit the various bolt head sizes on the MDX suspension.

  • Variety of sizes
  • Both standard and deep sockets
Learn more

Wrench Set (Metric)

A set of metric wrenches is needed for holding nuts or providing a secondary point for loosening and tightening fasteners.

  • Variety of sizes
  • Open end and box end options
Learn more

Extension Bars

Extension bars will provide additional reach for bolts in recessed or hard to access locations.

  • Varying lengths
  • Provides added reach
Learn more
Service Procedures

Front Suspension Lower Control Arm Bolt Torque

Procedure for tightening the lower control arm bolts on the front suspension to the correct torque specifications.

  • Locate the lower control arm bolts.
  • Using the correct metric socket, thread the bolts in by hand until snug.
  • Using a 1/2-inch drive torque wrench set to the manufacturer's specified torque, tighten the bolts.
  • Recheck the torque with the torque wrench to confirm proper tightening.
View full procedure

Rear Suspension Lower Control Arm Bolt Torque

Procedure for tightening the lower control arm bolts on the rear suspension to the correct torque specifications.

  • Locate the rear lower control arm bolts.
  • Using the correct metric socket, thread the bolts in by hand until snug.
  • Using a 1/2-inch drive torque wrench set to the manufacturer's specified torque, tighten the bolts.
  • Recheck the torque with the torque wrench to confirm proper tightening.
View full procedure

Front Strut Bolt Torque

Procedure for tightening the strut mounting bolts to the correct torque specifications.

  • Locate the strut mounting bolts (upper and lower).
  • Using the correct metric sockets, thread the bolts in by hand until snug.
  • Using a 1/2-inch or 3/8 inch drive torque wrench set to the manufacturer's specified torque, tighten the bolts in a star pattern.
  • Recheck the torque on all bolts with the torque wrench to confirm proper tightening.
View full procedure

Rear Shock Absorber Bolt Torque

Procedure for tightening the rear shock absorber bolts to the correct torque specifications.

  • Locate the rear shock absorber bolts.
  • Using the correct metric socket, thread the bolts in by hand until snug.
  • Using a 1/2-inch drive torque wrench set to the manufacturer's specified torque, tighten the bolts.
  • Recheck the torque with the torque wrench to confirm proper tightening.
View full procedure
Technical Service Bulletins

Suspension Clicking Noise

2010-07-15

Technical bulletin regarding a clicking noise that may be heard from the suspension. This may be due to improper torque on some suspension bolts.

2007-2010 MDX

Resolution: Inspect all suspension bolts, torque to specifications, and replace any damaged components.

Premature Bushing Wear

2012-03-22

Technical bulletin addressing issues of premature bushing wear which may be exacerbated by improperly torqued suspension components.

2010-2013 MDX

Resolution: Inspect bushing condition, replace as necessary, and ensure correct torque application during reassembly. Check alignment afterward.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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