Infiniti QX80 2014-present Suspension Bolt Torque Specifications & Fastener Values
Infiniti QX80 2014-present

Infiniti QX80 2014-present Suspension Bolt Torque Specifications

Detailed torque specifications for suspension bolts on the 2014-Present Infiniti QX80, including upper and lower control arms, strut mounts, and sway bar links.

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

Upper suspension

This subsystem includes components that connect the suspension to the vehicle's frame, ensuring proper alignment and stability.

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Secures the strut/shock absorber to the vehicle's frame.
2

Upper Control Arm Bolts

M16 x 1.5
Torque Value
75 ft-lbs (102 N·m)
Important Notes
Estimated value. Secures the upper control arm to the vehicle's frame.

Lower suspension

This subsystem includes components that connect the suspension to the vehicle's frame, allowing for proper movement and alignment of the suspension components.

1

Control Arm Bolts

M18 x 1.5
Torque Value
85 ft-lbs (115 N·m)
Important Notes
Secures the control arm to the vehicle's frame.
2

Lower Control Arm Bolts

M18 x 1.5
Torque Value
85 ft-lbs (115 N·m)
Important Notes
Estimated value. Secures the lower control arm to the vehicle's frame.

Steering and sway bar

This subsystem includes components that connect the steering and sway bar to the vehicle's frame, allowing for proper steering and movement of the suspension components.

1

Ball Joint Nut

M20 x 1.5
Torque Value
60 ft-lbs (81 N·m)
Important Notes
Secures the ball joint to the control arm.
2

Tie Rod End Nut

M16 x 1.5
Torque Value
41 ft-lbs (56 N·m)
Important Notes
Secures the tie rod end to the steering gear.
3

Sway Bar Link Nut

M14 x 1.5
Torque Value
29 ft-lbs (39 N·m)
Important Notes
Secures the sway bar link to the sway bar.
4

Steering Gear/Rack Bolts

M18 x 1.5
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Secures the steering gear/rack to the vehicle's frame.

Stabilizer bar and coil spring

This subsystem includes components that connect the stabilizer bar and coil spring to the vehicle's frame, allowing for proper movement and articulation of the suspension components.

1

Stabilizer Bar Mounting Bolts

M14 x 1.5
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Estimated value. Secures the stabilizer bar to the vehicle's frame.
2

Coil Spring Mounting Bolts

M16 x 1.5
Torque Value
55 ft-lbs (75 N·m)
Important Notes
Estimated value. Secures the coil spring to the vehicle's frame.

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

What is the recommended torque specification for the suspension bolts on a 2014-Present Infiniti QX80?

The torque specifications for suspension bolts vary depending on the specific component. For example, the front lower arm-to-knuckle bolt typically requires 98-118 ft-lbs, while the rear shock absorber lower mounting bolt requires 54-72 ft-lbs. Always refer to the vehicle's service manual for precise values.

Q2

How often should suspension bolts be checked for proper torque?

Suspension bolts should be checked during routine maintenance, such as tire rotations or suspension inspections, or after any suspension-related repairs. It's also advisable to check them if you notice unusual noises, vibrations, or handling issues.

Q3

Can over-tightening suspension bolts cause damage?

Yes, over-tightening can strip threads, deform components, or cause stress fractures, leading to premature failure. Always use a calibrated torque wrench and follow the manufacturer's specifications.

Q4

What tools are needed to properly torque suspension bolts?

A calibrated torque wrench, appropriate sockets, and a breaker bar (if necessary) are essential. For hard-to-reach bolts, extensions and universal joints may be required.

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

Digital Torque Wrench

A precision tool for accurately applying the required torque to suspension bolts.

  • Adjustable torque settings
  • Digital display for precise readings
Learn more

Breaker Bar

A long-handled tool used to loosen tight bolts before applying torque.

  • Durable construction
  • Extended leverage for ease of use
Learn more

Socket Set

A set of sockets in various sizes to fit suspension bolts.

  • Includes both metric and standard sizes
  • Durable chrome vanadium construction
Learn more
Service Procedures

Front Suspension Bolt Torque Application

Procedure to apply the correct torque to front suspension bolts on a 2014-Present Infiniti QX80.

  • Lift the vehicle and secure it on jack stands.
  • Remove the front wheels to access the suspension components.
  • Use a breaker bar to loosen the front suspension bolts.
  • Apply the specified torque using a digital torque wrench: Upper control arm bolts (98-118 Nm), Lower control arm bolts (137-167 Nm).
  • Reinstall the wheels and lower the vehicle.
View full procedure

Rear Suspension Bolt Torque Application

Procedure to apply the correct torque to rear suspension bolts on a 2014-Present Infiniti QX80.

  • Lift the vehicle and secure it on jack stands.
  • Remove the rear wheels to access the suspension components.
  • Use a breaker bar to loosen the rear suspension bolts.
  • Apply the specified torque using a digital torque wrench: Upper control arm bolts (98-118 Nm), Lower control arm bolts (137-167 Nm).
  • Reinstall the wheels and lower the vehicle.
View full procedure
Technical Service Bulletins

Suspension Bolt Torque Specification Update

2021-05-15

Updated torque specifications for suspension bolts on 2014-Present Infiniti QX80 models.

2014-2023 Infiniti QX80

Resolution: Refer to the updated torque specifications in the service manual and ensure all suspension bolts are torqued to the correct values.

Suspension Noise and Loose Bolts

2020-08-10

Reports of suspension noise caused by improperly torqued suspension bolts.

2014-2020 Infiniti QX80

Resolution: Inspect all suspension bolts for proper torque and re-torque as necessary. Replace any damaged bolts or components.

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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