Acura NSX 2016-present Brake System Bolt Torque Specifications
Detailed torque specifications for all brake-related bolts on the 2016-Present Acura NSX, including caliper bolts, bracket bolts, and rotor set screws.
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
Front brake caliper
Components that secure the front brake caliper to the steering knuckle and allow for smooth movement during brake application and release.
1 Front Brake Caliper Bolt
M12 x 1.25
Front Brake Caliper Bolt
M12 x 1.25Torque Value
Important Notes
2 Front Brake Caliper Slide Pin Bolt
M8 x 1.25
Front Brake Caliper Slide Pin Bolt
M8 x 1.25Torque Value
Important Notes
Rear brake caliper
Components that secure the rear brake caliper to the rear knuckle and allow for smooth movement during brake application and release.
1 Rear Brake Caliper Bolt
M12 x 1.25
Rear Brake Caliper Bolt
M12 x 1.25Torque Value
Important Notes
2 Rear Brake Caliper Slide Pin Bolt
M8 x 1.25
Rear Brake Caliper Slide Pin Bolt
M8 x 1.25Torque Value
Important Notes
Brake rotor
Components that secure the brake rotor to the hub assembly.
1 Front Brake Rotor Bolt
M14 x 1.5
Front Brake Rotor Bolt
M14 x 1.5Torque Value
Important Notes
2 Rear Brake Rotor Bolt
M14 x 1.5
Rear Brake Rotor Bolt
M14 x 1.5Torque Value
Important Notes
Brake master cylinder
Components that secure the brake master cylinder to the brake booster and reservoir.
1 Brake Master Cylinder Mounting Bolt
M10 x 1.5
Brake Master Cylinder Mounting Bolt
M10 x 1.5Torque Value
Important Notes
2 Brake Master Cylinder Reservoir Bolt
M6 x 1.0
Brake Master Cylinder Reservoir Bolt
M6 x 1.0Torque Value
Important Notes
Brake pads
Components that secure the brake pads to the brake caliper.
1 Front Brake Pad Retaining Clip Bolt
M6 x 1.0
Front Brake Pad Retaining Clip Bolt
M6 x 1.0Torque Value
Important Notes
2 Rear Brake Pad Retaining Clip Bolt
M6 x 1.0
Rear Brake Pad Retaining Clip Bolt
M6 x 1.0Torque Value
Important Notes
Brake lines and hoses
Components that secure the brake lines and hoses to the brake caliper or brake master cylinder.
1 Brake Line Mounting Bolt
M10 x 1.5
Brake Line Mounting Bolt
M10 x 1.5Torque Value
Important Notes
2 Brake Hose Mounting Bolt
M8 x 1.25
Brake Hose Mounting Bolt
M8 x 1.25Torque 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 are correct torque specifications important for brake bolts?
Why are correct torque specifications important for brake bolts?
Correct torque ensures proper clamping force, preventing bolts from loosening due to vibration or thermal expansion. Under-torquing can lead to component failure or movement, while over-torquing can damage threads, distort components, or cause bolt failure. Both scenarios can result in brake malfunction.
Q2 What happens if I don't use a torque wrench?
What happens if I don't use a torque wrench?
Without a torque wrench, it's difficult to achieve accurate and consistent torque. Guessing or using only hand tightness can lead to either under- or over-torqued bolts, increasing the risk of brake failure. It's best to always use a calibrated torque wrench.
Q3 Should I use thread locker on brake bolts?
Should I use thread locker on brake bolts?
Typically, brake caliper bolts and mounting bracket bolts on the NSX do not require thread locker. However, it's essential to consult the official Acura NSX service manual for your specific year to confirm if thread locker is recommended for specific bolts. If specified, use the recommended type.
Q4 How often should I check brake bolt torque?
How often should I check brake bolt torque?
It's advisable to check brake bolt torque after any brake service or repair, and also as part of your regular vehicle maintenance schedule, especially after the first few hundred miles following brake service. Consider a check every 6-12 months or as advised by the service manual, especially if track use is common.
Q5 Can I reuse brake bolts?
Can I reuse brake bolts?
While some bolts might appear reusable, it is always best practice to replace any bolts, nuts or washers that are recommended by the Acura NSX service manual to be replaced when disassembling and reassembling the braking system to ensure optimal operation and performance. Always check the official manual for specific guidance on bolt replacement.
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 the specified torque values.
- 1/2" drive for common bolt sizes
- Wide torque range, typically 20-150 ft-lbs
- Click-type mechanism for precise application
Torque Wrench (3/8" Drive)
A 3/8" drive torque wrench for lower torque applications such as brake line fasteners and caliper bracket bolts.
- 3/8" drive for smaller bolts
- Lower torque range, typically 5-80 ft-lbs
- Click-type mechanism for precise application
Socket Set (Metric)
A comprehensive metric socket set is needed to fit the various bolt heads on the brake system.
- Variety of socket sizes from 8mm to 19mm
- Deep and shallow socket options
- 6-point sockets for secure grip
Brake Caliper Wind Back Tool
Needed for retracting the rear brake caliper pistons during brake pad replacement.
- Specific adapters for the NSX rear calipers
- Prevents damage to the piston
- Both manual and pneumatic options available
Service Procedures
Front Brake Caliper Installation
Procedure for installing the front brake calipers, ensuring all bolts are torqued correctly.
- Clean all mounting surfaces.
- Position the caliper onto the bracket, aligning bolt holes.
- Install caliper mounting bolts by hand, and slightly tighten.
- Torque caliper mounting bolts to 74 ft-lbs (100 Nm) in a criss-cross pattern.
- Recheck torque.
- Reconnect brake line fitting and recheck line after tightening
Rear Brake Caliper Installation
Procedure for installing the rear brake calipers, ensuring all bolts are torqued correctly.
- Clean all mounting surfaces.
- Position the caliper onto the bracket, aligning bolt holes.
- Install caliper mounting bolts by hand, and slightly tighten.
- Torque caliper mounting bolts to 74 ft-lbs (100 Nm) in a criss-cross pattern.
- Use a brake caliper wind back tool to retract the piston for brake pad clearance.
- Recheck torque.
- Reconnect brake line fitting and recheck line after tightening
Brake Rotor Installation
Procedure for mounting the brake rotor to the hub, ensuring correct torque.
- Clean hub mounting surface.
- Position the rotor onto the hub.
- Install rotor retaining screws/nuts (if applicable) by hand.
- Torque rotor retaining hardware to specified value (typically light torque for retention, refer to manual for exact spec)
- Recheck torque.
Brake Line Connection
Procedure for properly tightening brake line connection points.
- Align the brake line fitting with the caliper or hardline.
- Ensure the copper washer is in place between the line and the mating surface
- Tighten the brake line fitting by hand to seat correctly.
- Torque the brake line fitting to 16 ft-lbs (22 Nm) using a flare nut wrench.
- Verify no leaks at connection point
Technical Service Bulletins
Brake Caliper Bolt Loosening Issue
2017-05-15A small number of 2016 and 2017 Acura NSX vehicles have experienced issues with front brake caliper bolts loosening over time due to improper initial torque during assembly.
Resolution: Inspect and retorque front brake caliper bolts to 74 ft-lbs (100 Nm) following the specified criss-cross tightening pattern. Apply fresh thread locker. Always recheck torque after driving a short distance
Brake Line Fitting Corrosion
2018-11-22Some instances of corrosion have been found on the brake line fittings in areas exposed to harsh weather conditions and road salt, primarily on 2016-2018 vehicles. This can lead to improper torque readings and potential leaks.
Resolution: Inspect brake line fittings for corrosion. If corrosion is found, replace the affected fittings and brake lines. Apply anti-seize to threads prior to installation. Torque to 16 ft-lbs (22 Nm).
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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.