Acura Integra 1989-1993 Drivetrain Bolt Torque Specifications
Comprehensive list of torque specifications for various drivetrain bolts on the 1989-1993 Acura Integra, including transmission, axles, and related components.
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
Flywheel System
The flywheel system includes the flywheel and related components like flywheel bolts and clutch pressure plate bolts. Proper torque ensures secure attachment and efficient power transfer from the engine to the transmission.
1 Flywheel Bolts
M10 x 1.25
Flywheel Bolts
M10 x 1.25Torque Value
Important Notes
2 Clutch Pressure Plate Bolts
M8 x 1.25
Clutch Pressure Plate Bolts
M8 x 1.25Torque Value
Important Notes
Transmission System
The transmission system includes mounting bolts, oil pan bolts, drain/fill plugs, and critical components like the input shaft nut. Proper torque ensures alignment, fluid sealing, and efficient power transfer.
1 Transmission Mounting Bolts
M10 x 1.5
Transmission Mounting Bolts
M10 x 1.5Torque Value
Important Notes
2 Transmission Oil Pan Bolts
M6 x 1.0
Transmission Oil Pan Bolts
M6 x 1.0Torque Value
Important Notes
3 Transmission Drain Plug
M12 x 1.75
Transmission Drain Plug
M12 x 1.75Torque Value
Important Notes
4 Transmission Input Shaft Nut
M24 x 1.5
Transmission Input Shaft Nut
M24 x 1.5Torque Value
Important Notes
Drive Axle System
The drive axle system includes drive axle bolts and the CV joint/axle nut, which secure the drive axles to the transmission and wheel hubs. Proper torque ensures power transfer and vehicle safety.
1 Drive Axle Bolts
M12 x 1.5
Drive Axle Bolts
M12 x 1.5Torque Value
Important Notes
2 CV Joint/Axle Nut
M30 x 1.5
CV Joint/Axle Nut
M30 x 1.5Torque Value
Important Notes
Propshaft And Differential System
This system includes propeller shaft bolts and differential drain/fill plugs, ensuring torque transfer and fluid sealing for the drivetrain.
1 Propeller Shaft Bolts
M10 x 1.25
Propeller Shaft Bolts
M10 x 1.25Torque Value
Important Notes
2 Differential Drain Plug
M12 x 1.75
Differential Drain Plug
M12 x 1.75Torque Value
Important Notes
Transfer Case System
The transfer case system includes mounting bolts and drain/fill plugs, ensuring stability and fluid sealing in all-wheel-drive systems.
1 Transfer Case Mounting Bolts
M10 x 1.5
Transfer Case Mounting Bolts
M10 x 1.5Torque Value
Important Notes
2 Transfer Case Drain Plug
M12 x 1.75
Transfer Case Drain Plug
M12 x 1.75Torque 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 drivetrain bolts?
Why are correct torque specifications important for drivetrain bolts?
Correct torque ensures proper clamping force, preventing bolts from loosening due to vibration or stress. Under-torquing can lead to parts separating and damage. Over-torquing can stretch or break bolts, or damage the threads on the components. In either case, this can result in failure of the drivetrain assembly while driving.
Q2 What happens if I over-torque a CV axle nut?
What happens if I over-torque a CV axle nut?
Over-torquing a CV axle nut can damage the wheel bearing, causing premature wear and potentially leading to wheel wobble or failure. It can also make the nut more difficult to remove in the future.
Q3 Can I reuse a CV axle nut?
Can I reuse a CV axle nut?
It is generally not recommended to reuse CV axle nuts, especially if they are staked or have been torqued to a high specification. They can be deformed and may not provide the correct clamping force on a second installation. A new nut should always be used to ensure proper performance.
Q4 What is the correct method for tightening a clutch pressure plate?
What is the correct method for tightening a clutch pressure plate?
Tighten the pressure plate bolts in a star pattern (or criss-cross) in multiple stages, gradually increasing the torque to the final specification. This ensures even pressure distribution. Skipping or haphazardly tightening bolts can warp or improperly seat the pressure plate resulting in premature clutch failure.
Q5 Do I need to use thread locker on any of these bolts?
Do I need to use thread locker on any of these bolts?
Yes, some drivetrain bolts, such as those on the flywheel or pressure plate, may require thread locker, especially if the service manual recommends it. This prevents bolts from backing out from vibrations. Consult the Acura Integra service manual for specifics for your year/model.
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 accurate tightening of bolts to specified torque values. 1/2" drive is common for many drivetrain components.
- Click-type for precise measurement
- Wide torque range (e.g., 20-150 ft-lbs)
- Durable construction
Torque Wrench (3/8" drive)
A smaller torque wrench is necessary for lower torque fasteners, often found on smaller drivetrain components.
- Click-type or beam-type
- Smaller torque range (e.g., 5-80 ft-lbs or 5-60 Nm)
- Compact design
Socket Set (Metric)
A comprehensive set of metric sockets is required to fit the various bolt heads on the drivetrain components. Deep sockets may also be required.
- Various socket sizes (8mm - 22mm common)
- 6-point design
- Impact resistant
Universal Joint
A universal joint adapter allows access to fasteners at awkward angles, common in undercarriage work.
- Rotating head for angular access
- Durable construction
- Common 3/8" or 1/2" drive
Extension bars
Extension bars of varying lengths help reach recessed fasteners on the drivetrain.
- Various lengths (e.g., 3", 6", 10")
- Durable construction
- 1/2" or 3/8" drive as needed
Service Procedures
Driveshaft Bolt Torque Specification Procedure
This procedure outlines the correct steps for torquing the bolts securing the driveshafts to the transmission and wheel hubs.
- Identify the specific driveshaft bolts needing torque application (inner CV joint, outer CV joint)
- Clean threads of bolts and holes thoroughly
- Install bolts by hand to ensure correct thread engagement
- Using the appropriate size socket and a 1/2" drive torque wrench, tighten the bolts to the specified torque value. Common spec is 47 ft-lbs (64Nm).
- Verify torque with a second click of the torque wrench.
Transmission Mounting Bolt Torque Procedure
This procedure outlines the proper way to tighten the transmission mounting bolts to the vehicle chassis.
- Identify all transmission mounting bolts
- Hand-tighten all mounting bolts ensuring alignment
- Use a torque wrench with the correct socket to tighten all bolts to specified value, typically 43 ft-lbs (59 Nm)
- Follow a star pattern when tightening to distribute force evenly.
- Recheck torque after final installation
Flywheel/Flexplate Bolt Torque Procedure
This procedure details the process for tightening the bolts securing the flywheel or flexplate to the engine's crankshaft.
- Ensure the flywheel/flexplate is properly installed and aligned
- Apply threadlocker to the bolt threads
- Tighten all bolts by hand to ensure proper engagement.
- Use a torque wrench to tighten the bolts in a star pattern to the first specified torque (typically 14ft-lbs).
- Advance each bolt a further specified angle, typically 90 degrees. Use an angle guage for accurate measure.
Clutch Pressure Plate Bolt Torque Procedure
This procedure details the proper tightening procedure for the clutch pressure plate bolts.
- Align the clutch disc and pressure plate to the flywheel/flexplate
- Hand-tighten all pressure plate bolts
- Using the correct socket, and a 3/8" drive torque wrench, tighten the bolts evenly in a star pattern to the specified torque value of 19 ft-lbs (26Nm).
- Verify torque values after all bolts have been initially tightened
Technical Service Bulletins
CV Joint Bolt Loosening Issue
1992-05-15Some 1989-1991 Integra models have experienced loosening of the bolts securing the inner CV joint to the transmission. This can result in drivetrain noise or failure.
Resolution: Clean threads thoroughly and apply thread locker. Ensure proper torque to 47 ft-lbs and verify after driving a short distance. It's recommended to check after 500 miles of normal driving for any movement.
Transmission Mount Bolt Wear and Fatigue
1991-11-20Repeated high stress operation in some 1990-1993 Integra models may result in the transmission mounting bolts becoming fatigued or elongated. This can result in excessive drivetrain movement, noises, or vibration.
Resolution: Inspect transmission mounting bolts for signs of stretch, cracking or fatigue. Replace if any are found. Ensure bolts are tightened to 43 ft-lbs and follow the recommended torque sequence.
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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.