Acura NSX 1990-2005 Body & Frame Bolt Torque Specifications
Comprehensive torque specifications for body bolts on the 1990-2005 Acura NSX, including various panels, brackets, and structural components. This guide provides the correct torque values for proper assembly and safety.
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
Body Exterior
Torque specifications for exterior body panels and components.
1 Hood Hinge Bolts
M8 x 1.25
Hood Hinge Bolts
M8 x 1.25Torque Value
Important Notes
2 Fender Bolts
M6 x 1.0
Fender Bolts
M6 x 1.0Torque Value
Important Notes
3 Bumper Cover Retainer Bolts/Screws
M6 x 1.0
Bumper Cover Retainer Bolts/Screws
M6 x 1.0Torque Value
Important Notes
4 Headlight Mounting Bolts
M6 x 1.0
Headlight Mounting Bolts
M6 x 1.0Torque Value
Important Notes
5 Tail Light Mounting Bolts
M6 x 1.0
Tail Light Mounting Bolts
M6 x 1.0Torque Value
Important Notes
6 Spoiler Mounting Bolts
M6 x 1.0
Spoiler Mounting Bolts
M6 x 1.0Torque Value
Important Notes
7 Side Mirror Mounting Bolts/Screws
M6 x 1.0
Side Mirror Mounting Bolts/Screws
M6 x 1.0Torque Value
Important Notes
8 License Plate Mounting Screws
M4 x 0.7
License Plate Mounting Screws
M4 x 0.7Torque Value
Important Notes
Body Doors
Torque specifications for door components and related hardware.
1 Door Hinge Bolts
M10 x 1.25
Door Hinge Bolts
M10 x 1.25Torque Value
Important Notes
2 Door Latch Bolts
M8 x 1.25
Door Latch Bolts
M8 x 1.25Torque Value
Important Notes
3 Glass Run Channel Bolts/Screws
M5 x 0.8
Glass Run Channel Bolts/Screws
M5 x 0.8Torque Value
Important Notes
4 Door Glass Regulator Mounting Bolts
M6 x 1.0
Door Glass Regulator Mounting Bolts
M6 x 1.0Torque Value
Important Notes
5 Door Handle Mounting Bolts/Screws
M6 x 1.0
Door Handle Mounting Bolts/Screws
M6 x 1.0Torque Value
Important Notes
Body Interior
Torque specifications for interior components and panels.
1 Seat Mounting Bolts
M10 x 1.25
Seat Mounting Bolts
M10 x 1.25Torque Value
Important Notes
2 Dashboard Mounting Bolts/Screws
M6 x 1.0
Dashboard Mounting Bolts/Screws
M6 x 1.0Torque Value
Important Notes
3 Interior Trim Panel Bolts/Screws
M4 x 0.7
Interior Trim Panel Bolts/Screws
M4 x 0.7Torque Value
Important Notes
4 Windshield Wiper Motor Bolts
M6 x 1.0
Windshield Wiper Motor Bolts
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 a torque wrench when tightening body bolts?
Why is it important to use a torque wrench when tightening body bolts?
Using a torque wrench ensures that body bolts are tightened to the manufacturer's specified torque. Over-tightening can damage the bolt, threads, or the body panel itself, potentially leading to cracks, deformation, or future loosening. Under-tightening can cause panels to shift, squeak, or even detach, jeopardizing safety and structural integrity. A torque wrench provides accurate control and consistent results.
Q2 What happens if I overtighten a body bolt?
What happens if I overtighten a body bolt?
Overtightening body bolts can lead to several issues. It can stretch or weaken the bolt itself, making it prone to failure. The threads in the body panel can be stripped or damaged, requiring costly repairs. Additionally, the panel itself can be warped or cracked due to excessive pressure, leading to alignment problems and potentially affecting the fit of other components. For example, overtightening a fender bolt could crack the mounting tabs.
Q3 Can I reuse body bolts?
Can I reuse body bolts?
While some body bolts can be reused, it's generally recommended to replace bolts that are critical for safety, or have signs of corrosion, damage, or have been previously over-tightened. If you are disassembling and reassembling a major body panel like a door or fender, it's wise to replace those fasteners. If a bolt feels gritty or rough when unthreading, that’s also a good sign it needs to be replaced. Many OEM fasteners on the NSX are coated to resist corrosion; replacing them helps maintain that protection.
Q4 Should I use thread locker on body bolts?
Should I use thread locker on body bolts?
Generally, thread locker (like Loctite) is not required for most body bolts on the NSX unless specifically indicated by the service manual. In cases where a bolt is exposed to vibration or is particularly critical, a thread-locking compound may be recommended. However, you should always refer to the NSX service manual to verify the specific requirements for your vehicle.
Q5 Are all body bolts the same torque specification?
Are all body bolts the same torque specification?
No, not all body bolts on the NSX have the same torque specification. Different sizes and materials require different torque values. Body panel bolts are typically in the range of 8-25 ft-lbs (11-34 Nm) but vary by location. Always consult the specific torque specifications for each bolt as detailed in the service manual. For example, the bolts holding the front bumper cover will have a different specification than the bolts attaching the door.
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 body bolts to the manufacturer's specifications. A 1/2" drive is typically sufficient for most NSX body bolts.
- Click-type mechanism for accurate torque application
- Wide torque range to cover various bolt sizes
Torque Wrench (3/8" Drive)
A 3/8" drive torque wrench is useful for smaller, less critical body bolts.
- Smaller form factor for access in tight spaces
- Lower torque range for smaller bolts
Socket Set (Metric)
A comprehensive set of metric sockets in various sizes is necessary to fit the diverse range of body bolts on the NSX.
- Chrome Vanadium steel construction
- Shallow and deep sockets included
Extension Bars
Extension bars are important to reach bolts in hard-to-access locations.
- Various lengths to accommodate different reach needs
- Durable steel construction
Universal Joint
A universal joint allows torque to be applied at an angle when obstructions are present
- Allows flexibility in tight spaces
- Strong build quality
Service Procedures
General Body Bolt Torque Procedure
This procedure outlines the general steps for torquing body bolts on an Acura NSX. Always consult the specific torque specifications for each bolt before proceeding. Refer to the Acura service manual for detailed bolt locations and torque values. Always clean threads before installing.
- Identify the bolt and its corresponding torque specification from the service manual.
- Select the appropriate socket for the bolt.
- Attach the socket to the torque wrench and select the correct torque setting.
- Apply a small amount of anti-seize compound on the bolt threads, if desired (especially for aluminum body panels).
- Tighten the bolt until the torque wrench clicks, indicating the desired torque has been reached.
- If the bolts are in an pattern, torque in a criss-cross pattern to ensure even pressure.
- Double-check the torque settings on all bolts once the procedure is complete.
- Retorque after some time if specified in the service manual.
Front Bumper Cover Installation
This procedure covers the installation and torque of bolts related to the front bumper cover. Clean surfaces and check alignment before tightening.
- Align the front bumper cover to the mounting locations.
- Install all bolts by hand until snug.
- Using a torque wrench, torque bolts to 11 Nm in a criss-cross pattern.
- Recheck the torque of all bolts once completed.
Rear Bumper Cover Installation
This procedure covers the installation and torque of bolts related to the rear bumper cover. Check the alignment of body panels before fully tightening bolts.
- Align rear bumper cover to the mounting location.
- Install all bolts by hand until snug.
- Using a torque wrench, torque all bolts to 11 Nm.
- Recheck torque to ensure fasteners are correctly torqued.
Side Skirt Installation
This procedure outlines how to properly install side skirts on the NSX. Be mindful of the body panel alignment before tightening.
- Align the side skirts to the mounting locations.
- Install all bolts by hand until snug.
- Using a torque wrench, torque the bolts to 9.8 Nm.
- Recheck the torque on all the bolts once completed
Technical Service Bulletins
Corrosion Issues on Aluminum Body Panels
2001-07-15Some early NSX models exhibited corrosion issues around body panel attachment points due to galvanic corrosion. This is caused by the steel bolts interacting with the aluminum body panels.
Resolution: When removing and reinstalling body panels, ensure to use anti-seize lubricant on all fasteners and body interfaces. Check and repair any existing corrosion, particularly around mounting points. Additionally, torque all fasteners to the specified value.
Loose Body Bolts
2003-04-10Instances of body bolts loosening over time have been reported in high-mileage vehicles. This can lead to rattling and misaligned body panels.
Resolution: Regularly inspect body bolts for looseness, especially after driving in demanding conditions. Refer to the service manual for correct torque specifications and retighten any loose fasteners. Use an anti-seize lubricant where applicable.
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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.