Infiniti QX50 2019-present Brake System Bolt Torque Specifications & Fastener Values
Infiniti QX50 2019-present

Infiniti QX50 2019-present Brake System Bolt Torque Specifications

Detailed torque specifications for brake components on the 2019-Present Infiniti QX50, including caliper bolts, rotor bolts, and brake line fittings.

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

Brake Caliper

This subsystem includes components related to the brake caliper and its mounting, ensuring secure attachment and proper alignment for effective braking.

1

Brake Caliper Bolts

M10 x 1.5
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Ensure bolts are tightened evenly to prevent uneven brake pad wear.
2

Brake Caliper Mounting Bracket Bolts

M12 x 1.5
Torque Value
85 ft-lbs (115 N·m)
Important Notes
Proper torque ensures stable bracket alignment.

Brake Rotor Drum

This subsystem includes components related to the brake rotor or drum, ensuring secure attachment to the hub to prevent vibration or wobbling during braking.

1

Brake Disc/Drum Retaining Bolts

M8 x 1.25
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Ensures the rotor/drum is securely fastened to the hub.

Wheel Lug Nuts

This subsystem includes the wheel lug nuts, which secure the wheel to the hub, indirectly affecting brake performance.

1

Wheel Lug Nuts

M14 x 1.5
Important Notes
Tighten in a star pattern to ensure even distribution of torque.

Brake Hose

This subsystem includes components related to the brake hose, ensuring leak-free connections to maintain hydraulic pressure in the brake system.

1

Brake Hose Banjo Bolt

M6 x 1.0
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Ensures a leak-free connection between the brake hose and caliper.

Brake Master Cylinder

This subsystem includes components related to the brake master cylinder, ensuring secure attachment to maintain proper brake fluid pressure.

1

Brake Master Cylinder Mounting Bolts

M6 x 1.0
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Ensures the master cylinder is securely attached to the brake booster.

Brake Booster

This subsystem includes components related to the brake booster, ensuring secure attachment to the firewall for consistent brake pedal feel and performance.

1

Brake Booster Mounting Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensures the brake booster remains stable.

Brake Pedal

This subsystem includes components related to the brake pedal assembly, ensuring secure attachment for smooth and consistent pedal operation.

1

Brake Pedal Assembly Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensures the brake pedal operates smoothly and consistently.

Abs Sensor

This subsystem includes components related to the ABS sensor, ensuring secure attachment for accurate wheel speed readings.

1

ABS Sensor Mounting Bolts

M5 x 0.8
Torque Value
7 ft-lbs (9 N·m)
Important Notes
Ensures the ABS sensor remains securely attached.

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 are the torque specifications for the brake caliper bolts on a 2019-Present Infiniti QX50?

The brake caliper bolts on a 2019-Present Infiniti QX50 should be torqued to 26-32 ft-lbs (35-43 Nm). Always refer to the vehicle's service manual for the most accurate and up-to-date specifications.

Q2

How often should I check the torque on my brake components?

It is recommended to check the torque on brake components, such as caliper bolts and rotor retaining screws, during routine maintenance or whenever the brakes are serviced. This ensures proper clamping force and prevents issues like uneven wear or brake failure.

Q3

Can I reuse brake caliper bolts after removal?

It is generally not recommended to reuse brake caliper bolts, as they are often torque-to-yield (TTY) bolts designed for one-time use. Reusing them can compromise their integrity and lead to brake system failure. Always replace with new bolts as specified by the manufacturer.

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 precision tool used to apply a specific torque to brake system bolts.

  • Adjustable torque settings
  • Durable construction for automotive use
Learn more

Breaker Bar

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

  • High leverage for tough bolts
  • Compatible with standard sockets
Learn more

Socket Set

A set of sockets in various sizes for brake system bolts.

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

Front Brake Caliper Bolt Torque Application

Procedure to properly torque the front brake caliper bolts on a 2019-Present Infiniti QX50.

  • Lift the vehicle and secure it on jack stands.
  • Remove the front wheels to access the brake caliper.
  • Use a breaker bar to loosen the caliper bolts.
  • Clean the bolt threads and apply a small amount of thread locker.
  • Tighten the caliper bolts to the specified torque using a torque wrench.
  • Reinstall the wheels and lower the vehicle.
View full procedure

Rear Brake Caliper Bolt Torque Application

Procedure to properly torque the rear brake caliper bolts on a 2019-Present Infiniti QX50.

  • Lift the vehicle and secure it on jack stands.
  • Remove the rear wheels to access the brake caliper.
  • Use a breaker bar to loosen the caliper bolts.
  • Clean the bolt threads and apply a small amount of thread locker.
  • Tighten the caliper bolts to the specified torque using a torque wrench.
  • Reinstall the wheels and lower the vehicle.
View full procedure
Technical Service Bulletins

Brake Caliper Bolt Torque Specification Update

2021-05-15

Updated torque specifications for front and rear brake caliper bolts.

2019-2023 Infiniti QX50

Resolution: Refer to the latest service manual for updated torque values and ensure proper application during service.

Brake System Noise Investigation

2020-08-10

Investigation into brake system noise related to improperly torqued caliper bolts.

2019-2022 Infiniti QX50

Resolution: Verify torque specifications and re-torque caliper bolts as necessary. Replace any damaged components.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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