Cadillac XT4 2019-present Brake System Bolt Torque Specifications & Fastener Values
Cadillac XT4 2019-present

Cadillac XT4 2019-present Brake System Bolt Torque Specifications

Detailed torque specifications for all brake system bolts on the 2019-Present Cadillac XT4, including caliper bolts, bracket bolts, and rotor retaining screws.

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

Caliper Mounting

Torque specifications for the components involved in mounting the brake caliper to the vehicle.

1

Brake Caliper Bolts

M12 x 1.75
Torque Value
26 ft-lbs (35.3 N·m)
Important Notes
Secures the caliper to the mounting bracket. Ensure threads are clean and in good condition. Torque evenly.
2

Brake Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Value
79 ft-lbs (107 N·m)
Important Notes
Secures the mounting bracket to the steering knuckle or hub carrier. This is a critical connection for the brake system's integrity. Ensure the bracket is flush with the knuckle before tightening.

Rotor Attachment

Torque specifications for the hardware that holds the brake rotor to the hub.

1

Brake Disc/Drum Retaining Bolts

M6 x 1.0
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
These bolts secure the rotor or drum to the hub during assembly only. Do not overtighten. Estimated value.
2

Brake Rotor Retaining Screw

M5 x 0.8
Torque Value
7.5 ft-lbs (10.2 N·m)
Important Notes
Secures the brake rotor to the hub during assembly. Use a proper screwdriver, do not overtighten. Estimated value.

Hydraulic Connections

Torque specifications for the various bolts that connect the hydraulic brake lines.

1

Brake Line Fitting/Banjo Bolt

M10 x 1.0
Torque Value
13 ft-lbs (17.6 N·m)
Important Notes
Connects hydraulic lines to the brake caliper and master cylinder. Always use new crush washers. Estimated value, may vary slightly depending on type and material.
2

Brake Caliper Bleeder Screw

M7 x 1.0
Torque Value
9 ft-lbs (12.2 N·m)
Important Notes
Used for bleeding air from the brake system. Do not overtighten. Estimated value.

Pad Retention

Torque specifications for bolts and pins that secure the brake pads.

1

Brake Pad Guide Pin Bolts

M8 x 1.25
Torque Value
14 ft-lbs (19 N·m)
Important Notes
Secures the guide pins that hold the brake pads. Ensure the pins are properly aligned and lubricated. Estimated value, varies by pin type and design.

Wheel Attachment

Torque specifications for securing the wheel to the hub, critical for safe brake operation.

1

Wheel Lug Nuts

M12 x 1.5
Torque Value
100 ft-lbs (136 N·m)
Important Notes
Secures the wheel to the hub. Always use a cross-tightening pattern. Ensure that lug nuts are clean and in good condition, and that they are compatible with the wheel. This value is common, but check your vehicle's service manual for exact values.

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 correct torque specifications important for brake bolts?

Correct torque is crucial for brake safety and performance. Under-torqued bolts can loosen, leading to component failure, while over-torqued bolts can stretch or break, compromising the clamping force and potentially damaging threads. Either scenario can cause brake malfunction and increased accident risk. Improper torque can also lead to uneven rotor wear and premature component failure. For instance, if a caliper mounting bolt is too loose, the caliper can shift, causing uneven pad wear and brake pulsation.

Q2

What happens if I overtighten a brake bolt?

Overtightening brake bolts can cause several problems. Firstly, it can stretch or deform the bolt, weakening its clamping force and leading to eventual failure. Secondly, excessive torque can damage threads in the caliper or hub, making it difficult to achieve the proper torque in the future. This may require costly repairs like thread inserts or component replacement. For example, overtightening a caliper guide pin bolt can cause the pin to bind, affecting brake release and causing premature brake pad wear and overheating.

Q3

Should I use new bolts when servicing my brakes?

It's generally recommended to use new bolts, especially for critical components like caliper brackets and rotor retention screws. Brake bolts can stretch and weaken over time due to thermal cycling and constant stress. Reusing old bolts increases the risk of failure. New bolts provide the correct clamping force and prevent future issues. While some guide pin bolts may be reusable, carefully inspect the bolts for stretching and deformation and replace them if any damage is visible, and always check for vehicle manufacturer recommendations.

Q4

What should I do if I suspect a brake bolt is loose?

If you suspect a brake bolt is loose, immediately stop driving and do not operate the vehicle. A loose brake bolt can lead to catastrophic failure of the braking system. You should inspect all brake components, identify the loose bolt(s), and if the bolt is not damaged, re-torque to the correct specification using a calibrated torque wrench. If you are not comfortable with this, have the vehicle towed to a professional mechanic for inspection and repair. Driving a vehicle with suspected loose brake hardware is dangerous. For example, a loose caliper bolt can cause the caliper to move, resulting in a loss of braking efficiency or a complete brake failure.

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 (10-100 ft-lbs)

A calibrated torque wrench to apply accurate torque to brake bolts.

  • Measures torque in ft-lbs or Nm
  • Audible click when set torque is achieved
  • 3/8" or 1/2" drive
Learn more

Torx Socket Set

Set of Torx sockets to fit various brake caliper bolts.

  • Includes various sizes (e.g., T40, T45, T50)
  • Durable construction
  • Sockets made from high-strength steel
Learn more

Socket Set (Metric)

Standard metric sockets for other brake hardware.

  • Includes common sizes like 10mm, 13mm, 15mm, 17mm
  • Durable construction
  • 3/8" or 1/2" drive
Learn more
Service Procedures

Front Brake Caliper Bolt Torque Procedure

Procedure to properly torque the front brake caliper bolts.

  • Locate the front brake caliper bolts.
  • Using the appropriate Torx socket, snug the bolts down.
  • Set the torque wrench to the specified torque (28 ft-lbs).
  • Torque each bolt to 28 ft-lbs in a criss-cross pattern to ensure even distribution.
  • Verify all bolts are torqued to specification.
View full procedure

Rear Brake Caliper Bolt Torque Procedure

Procedure to properly torque the rear brake caliper bolts.

  • Locate the rear brake caliper bolts.
  • Using the appropriate Torx socket, snug the bolts down.
  • Set the torque wrench to the specified torque (28 ft-lbs).
  • Torque each bolt to 28 ft-lbs in a criss-cross pattern to ensure even distribution.
  • Verify all bolts are torqued to specification.
View full procedure

Brake Caliper Bracket Bolt Torque Procedure

Procedure to properly torque the brake caliper bracket bolts.

  • Locate the brake caliper bracket bolts.
  • Using the appropriate socket, snug the bolts down.
  • Set the torque wrench to the specified torque (125 ft-lbs).
  • Torque each bolt to 125 ft-lbs in a criss-cross pattern to ensure even distribution.
  • Verify all bolts are torqued to specification.
View full procedure
Technical Service Bulletins

Brake Noise and Vibration Concerns

2021-03-15

This bulletin addresses concerns of brake noise and vibration, and highlights the importance of proper torque application and correct brake component installation during service procedures.

2019-2021

Resolution: Ensure all bolts are torqued to specifications, inspect brake components for excessive wear or damage and follow proper brake service procedures. Check for warped rotors and replace if needed.

Updated Brake Caliper Bolt Torque Specification

2022-05-10

This bulletin informs technicians of a slight adjustment to the recommended torque for the brake caliper bolts.

2019-2022

Resolution: The specified torque for the brake caliper bolts is 28 ft-lbs. Adherence to this specification is critical to ensure proper brake performance.

Brake Component Inspection Recommendations

2023-01-20

This bulletin provides recommendations on regular brake component inspection for optimal performance.

2019-2023

Resolution: Regularly inspect brake rotors, pads and calipers. Ensure hardware is free from damage and bolts are torqued to specifications. Replace any parts that show signs of wear or damage immediately.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

Automotive Technical Specialist

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  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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