Acura NSX 1990-2005 Brake System Bolt Torque Specifications
Detailed torque specifications for various brake components on the 1990-2005 Acura NSX, including calipers, rotors, and related hardware.
Important Information
Safety guidelines and reference information for proper torque application
Safety First
- Always verify torque specifications with your vehicle's factory service manual
- Use properly calibrated torque wrenches
- Replace all torque-to-yield (TTY) bolts - they are single-use only
- When in doubt, consult a professional mechanic
Quick Reference Guide
Quick Reference Guide
Common Torque Patterns
Star Pattern
Used for wheels and other circular bolt patterns
Cross Pattern
Used for gaskets and cover plates
Sequential Pattern
Used for head bolts and other critical components
Common Mistakes to Avoid
Common Mistakes to Avoid
Over-tightening
Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.
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.
Follow the manufacturer's specified torque sequence pattern.
Dirty Threads
Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.
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.
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.
Check if specs are for dry or lubricated threads. Use specified lubricant when required.
Recommended Tools
Recommended Tools
Torque Wrench (1/4" Drive)
Torque Wrench (3/8" Drive)
Torque Wrench (1/2" Drive)
Angle Gauge
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 Calipers
Torque specifications for brake calipers and related components.
1 Brake Caliper Mounting Bolts
M12 x 1.25
Brake Caliper Mounting Bolts
M12 x 1.25Torque Value
Important Notes
2 Brake Caliper Bleeder Valve
M10 x 1.0
Brake Caliper Bleeder Valve
M10 x 1.0Torque Value
Important Notes
3 Brake Line Banjo Bolts
M10 x 1.0
Brake Line Banjo Bolts
M10 x 1.0Torque Value
Important Notes
Brake Mounting Brackets
Torque specifications for brake caliper mounting brackets.
1 Brake Caliper Mounting Bracket Bolts
M14 x 1.5
Brake Caliper Mounting Bracket Bolts
M14 x 1.5Torque Value
Important Notes
Brake Rotors
Torque specifications for brake rotors/discs and related components.
1 Brake Disc/Drum Retaining Bolts
M6 x 1.0
Brake Disc/Drum Retaining Bolts
M6 x 1.0Torque Value
Important Notes
Wheel Mounting
Torque specifications for wheel mounting.
1 Wheel Lug Nuts
M12 x 1.5
Wheel Lug Nuts
M12 x 1.5Torque Value
Important Notes
Master Cylinder
Torque specifications for the brake master cylinder and related components.
1 Brake Master Cylinder Mounting Bolts
M8 x 1.25
Brake Master Cylinder Mounting Bolts
M8 x 1.25Torque Value
Important Notes
Brake Booster
Torque specifications for the brake booster and related components.
1 Brake Booster Mounting Bolts
M10 x 1.25
Brake Booster Mounting Bolts
M10 x 1.25Torque Value
Important Notes
Brake Pedal
Torque specifications for the brake pedal and related components.
1 Brake Pedal Pivot Bolt/Nut
M10 x 1.5
Brake Pedal Pivot Bolt/Nut
M10 x 1.5Torque Value
Important Notes
Abs System
Torque specifications for the ABS sensors and related components.
1 ABS sensor mounting bolt
M6 x 1.0
ABS sensor mounting bolt
M6 x 1.0Torque Value
Important Notes
Troubleshooting Guide
Common issues, diagnostic steps, and prevention guidelines
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
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
Diagnostic Steps
Visual inspection, torque verification, thread assessment
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
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
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
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 it important to use the correct torque specifications for brake bolts?
Why is it important to use the correct torque specifications for brake bolts?
Using the correct torque specifications is crucial for brake safety and performance. Under-tightening can cause bolts to loosen, potentially leading to brake failure. Over-tightening can strip threads, warp components, or cause bolts to shear, also resulting in a dangerous situation. Accurate torque ensures the brake components are securely and evenly clamped together, enabling reliable braking.
Q2 Can I use a standard torque wrench, or do I need a specialized one?
Can I use a standard torque wrench, or do I need a specialized one?
A standard, calibrated torque wrench capable of measuring within the specified range for each bolt is sufficient. For example, the caliper mounting bolts require higher torque than the bleeder screw, so a wrench that handles both ranges is ideal. Ensure your torque wrench is regularly calibrated for accurate readings. A clicker type is a common and suitable choice.
Q3 What happens if I don't have a torque wrench? Can I 'eyeball' it?
What happens if I don't have a torque wrench? Can I 'eyeball' it?
Never attempt to 'eyeball' brake bolt torque. This is extremely dangerous and can lead to brake failure. The correct torque is a precise measurement; estimating or using guesswork is unacceptable. Always use a calibrated torque wrench. If you don't have one, borrow or rent one from an auto parts store or mechanic.
Q4 Do I need to use threadlocker on brake bolts?
Do I need to use threadlocker on brake bolts?
Generally, threadlocker is not required on the main brake caliper mounting bolts or the rotor retaining screws. These are typically tightened to a specific torque that creates sufficient clamping force. However, some smaller bolts, like those on the ABS sensor brackets, might benefit from a light threadlocker. Always consult the specific NSX repair manual for verification on each bolt.
Q5 Should I replace my brake bolts when replacing rotors or pads?
Should I replace my brake bolts when replacing rotors or pads?
It's not always mandatory to replace brake bolts, however, it is highly advisable to inspect them thoroughly. If they show signs of stretching, rust, or damage, they should absolutely be replaced. For high stress bolts such as caliper mounting bolts, replacing them with new ones is a best practice for peace of mind. Additionally, some components, such as rotor retaining screws, are frequently recommended for replacement each time they are loosened.
Environmental Considerations
Temperature, humidity, and seasonal effects on torque specifications
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
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
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
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" Drive)
A calibrated torque wrench is essential for accurately tightening bolts to specified torque values, preventing damage and ensuring safe operation.
- Measures torque in foot-pounds (ft-lbs) or Newton-meters (Nm)
- Click-type or digital display for accurate readings
- 1/2" drive for standard automotive bolt sizes
Torque Wrench (3/8" Drive)
A smaller torque wrench is necessary for smaller fasteners and spaces.
- Measures torque in inch-pounds (in-lbs) or Newton-meters (Nm)
- Click-type or digital display for accurate readings
- 3/8" drive for smaller bolt sizes
Socket Set (Standard and Metric)
A comprehensive set of sockets is needed to fit the various bolt sizes on the brake system.
- Includes both standard (SAE) and metric socket sizes
- Various drive sizes (1/4", 3/8", 1/2") to match torque wrenches
- 6-point sockets recommended for secure grip
Wrench Set (Standard and Metric)
A wrench set provides access to fasteners where a socket may not fit.
- Includes both standard (SAE) and metric wrench sizes
- Open-end and box-end options for versatility
- Combination wrenches are most useful
Service Procedures
Front Brake Caliper Bolt Torque
Procedure for torquing the bolts that secure the front brake caliper to the hub assembly.
- Clean the threads of all bolts and caliper mounting points.
- Apply a light coating of anti-seize to the bolt threads.
- Hand-tighten all caliper mounting bolts.
- Torque the caliper mounting bolts to 76 ft-lbs (103 Nm) in a cross pattern to ensure even clamping.
- Double check the torque after a few minutes.
Rear Brake Caliper Bolt Torque
Procedure for torquing the bolts that secure the rear brake caliper to the hub assembly.
- Clean the threads of all bolts and caliper mounting points.
- Apply a light coating of anti-seize to the bolt threads.
- Hand-tighten all caliper mounting bolts.
- Torque the caliper mounting bolts to 76 ft-lbs (103 Nm) in a cross pattern to ensure even clamping.
- Double check the torque after a few minutes.
Brake Rotor to Hub Torque
Procedure for torquing the bolts that secure the brake rotor to the hub assembly.
- Clean the mating surfaces of the rotor and hub.
- Apply a light coating of anti-seize to the bolt threads (if applicable).
- Hand-tighten the rotor mounting bolts.
- Torque the rotor mounting bolts to 50 ft-lbs (68 Nm) in a cross pattern to ensure even clamping.
- Double check the torque after a few minutes.
Brake Caliper Bleeder Valve Torque
Procedure for torquing the bleeder valves on the brake calipers.
- Clean the bleeder valve threads and mating surface.
- Install a new copper crush washer.
- Hand-tighten the bleeder valve.
- Torque the bleeder valve to 11 ft-lbs (15 Nm).
- Do not over-tighten, as the bleeder valve can be damaged.
Technical Service Bulletins
Brake Caliper Bolt Corrosion
2002-05-15Reports of corrosion on brake caliper mounting bolts, particularly in areas with heavy salt exposure. This can lead to improper torque readings and compromised braking performance.
Resolution: Inspect caliper bolts for corrosion. Replace corroded bolts. Apply anti-seize to bolt threads during reinstallation. Ensure proper torque is applied.
Brake Rotor Mounting Bolt Stretch
2004-11-20Some instances of rotor mounting bolts stretching or becoming damaged after multiple installations. This can lead to improper clamping and rotor wobble.
Resolution: Always inspect rotor mounting bolts for wear, stretch, or damage. Replace bolts as necessary. Use a torque wrench to tighten bolts to the specified torque. Do not over tighten.
ABS Module Related Torque Specs
2000-02-25The mounting bolts for the ABS module have specific torque specifications that must be followed to avoid compromising the system.
Resolution: Torque the ABS module mounting bolts to 18 ft-lbs (24 Nm). If the ABS module or lines are removed and reinstalled, the braking system must be bleed.
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Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.