Acura Integra 1985-1989 MP7 Transmission Transmission Torque Specifications & Bolt Torque Values
Acura Integra 1985-1989

Acura Integra 1985-1989 MP7 Transmission Torque Specifications

Detailed torque specifications for all bolts on the MP7 transmission found in the 1985-1989 Acura Integra, including bellhousing, case, and pan bolts.

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

Flywheel And Clutch

This subsystem includes components that connect the engine to the transmission, such as the flywheel, clutch pressure plate, and related bolts. Proper torque ensures secure attachment and smooth operation.

1

Flywheel Bolts

M10 x 1.25
Torque Value
80 ft-lbs (108 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute load.
2

Clutch Pressure Plate Bolts

M8 x 1.25
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Estimated value based on similar M8 bolts. Tighten in a star pattern.

Transmission Mounting

This subsystem includes bolts that secure the transmission to the chassis and crossmember. Proper torque ensures stability and reduces vibrations.

1

Transmission Mounting Bolts

M10 x 1.5
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Ensure transmission is properly aligned before tightening.
2

Transmission Crossmember Bolts

M10 x 1.5
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Ensure crossmember is properly aligned with the transmission.

Oil Pan And Plugs

This subsystem includes the transmission oil pan and drain/fill plugs. Proper torque ensures a leak-free seal and proper fluid retention.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten bolts in a crisscross pattern to ensure even sealing.
2

Transmission Drain Plug

M14 x 1.5
Torque Value
33 ft-lbs (45 N·m)
Important Notes
Ensure the drain plug is properly sealed with a new washer.
3

Transmission Fill Plug

M14 x 1.5
Torque Value
33 ft-lbs (45 N·m)
Important Notes
Ensure the fill plug is properly sealed with a new washer.

Drive Axles And Cv Joints

This subsystem includes components that connect the transmission to the wheels, such as drive axles and CV joints. Proper torque ensures secure attachment and smooth power transfer.

1

Drive Axle/Half Shaft Bolts

M10 x 1.25
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Ensure the axle is properly seated before tightening.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Value
200 ft-lbs (271 N·m)
Important Notes
Ensure the axle nut is properly seated and staked after tightening.

Starter Motor

This subsystem includes the starter motor and its mounting bolts. Proper torque ensures secure attachment and proper alignment with the flywheel.

1

Starter Motor Mounting Bolts

M8 x 1.25
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Ensure the starter motor is properly aligned with the flywheel.

Shift Linkage

This subsystem includes the shift linkage and its mounting bolts. Proper torque ensures smooth shifting and prevents looseness or misalignment.

1

Shift Linkage Bolts

M6 x 1.0
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Estimated value based on similar M6 bolts. Ensure proper alignment of the shift linkage.

Reverse Light Switch

This subsystem includes the reverse light switch, which is threaded into the transmission housing. Proper torque ensures secure attachment and proper functionality.

1

Reverse Light Switch

M12 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Ensure the switch is properly sealed to prevent leaks.

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 is using the correct torque specification so important for the MP7 transmission bolts?

Using the correct torque specification ensures proper clamping force. Overtightening can stretch or break bolts, damage the transmission case, and lead to leaks or component failure. Undertightening can cause bolts to loosen, resulting in leaks, vibration, and potential damage. For example, overtightening the bell housing bolts can crack the housing, while undertightening them can allow the transmission to shift during operation, causing damage and wear.

Q2

What happens if I don't have a torque wrench?

A torque wrench is essential for accurate bolt tightening. While a 'feel' method can be used in a pinch, it is not recommended for critical components like transmission bolts. Using a wrench without proper torque will significantly increase the risk of incorrect tightening. It's highly advised to borrow or invest in a torque wrench. Incorrect torque can lead to expensive repairs down the line.

Q3

Should I use new bolts every time I work on the MP7 transmission?

While not always mandatory, it's highly recommended to use new bolts, especially for critical components and after multiple uses. Old bolts can stretch and lose their original clamping force, even with proper torque. New bolts ensure optimal performance and safety. For instance, axle flange bolts that have been used multiple times are prone to failing, so replacing them is a good preventative measure.

Q4

Do I need to use threadlocker on the MP7 transmission bolts?

Whether you use threadlocker depends on the specific bolts. Typically, bolts that need to resist vibration and loosening will benefit from a medium-strength threadlocker (like Loctite 242 or similar). Consult your repair manual for guidance. For instance, many bell housing bolts do not require threadlocker but some smaller bolts on covers might. Always refer to the manual.

Q5

Are there specific sequences for tightening MP7 transmission bolts?

Yes, there is often a specific sequence, especially for the bell housing bolts. This helps distribute clamping force evenly and prevent case warping. It is best to tighten these bolts in a criss-cross pattern. Always refer to the service manual for the correct tightening sequence, as neglecting this will lead to uneven pressure and component failures.

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 (1/2" Drive)

A calibrated torque wrench is essential for achieving accurate bolt torque specifications.

  • Measures torque in lb-ft or Nm
  • Click-type or digital
Learn more

14mm Socket (1/2" Drive)

A 14mm socket is required to fit the MP7 transmission bolts.

  • 6-point socket preferred for secure grip
  • Chrome Vanadium Steel
Learn more

17mm Socket (1/2" Drive)

A 17mm socket is required to fit the MP7 transmission bellhousing bolts.

  • 6-point socket preferred for secure grip
  • Chrome Vanadium Steel
Learn more

Extension Bar (1/2" Drive)

An extension bar may be needed to access recessed bolts.

  • Various lengths available
  • Chrome Vanadium Steel
Learn more
Service Procedures

MP7 Transmission Bolt Torque Procedure

This procedure outlines the correct steps for torquing bolts on the MP7 transmission of a 1985-1989 Acura Integra.

  • 1. Ensure all bolt threads are clean and free of debris.
  • 2. Apply a small amount of anti-seize compound to the bolt threads (optional, but recommended).
  • 3. Install all bolts finger-tight initially.
  • 4. Tighten all bellhousing bolts to 33 ft-lb (45 Nm)
  • 5. Tighten all case bolts to 22 ft-lb (30 Nm)
  • 6. Using a criss-cross pattern, tighten bolts in two or three stages to ensure even pressure. Start by torquing to half the final torque specification, then the full value.
  • 7. Verify final torque on all bolts after tightening sequence is complete.
View full procedure

Inspection of Bolt Threads Procedure

This procedure outlines the correct way to inspect transmission bolt threads.

  • 1. Visually inspect all bolt threads for damage, such as stripping or corrosion.
  • 2. Clean any damaged or dirty threads with a wire brush.
  • 3. Check the depth of the threads inside the transmission case. Repair if needed.
  • 4. Replace any damaged bolts with new ones of the same grade and size before installation.
View full procedure
Technical Service Bulletins

Technical Bulletin: Transmission Case Bolt Loosening

1989-05-15

This bulletin addresses reports of transmission case bolts loosening over time, specifically in high-stress applications.

1985-1989 Acura Integra

Resolution: Inspect transmission case bolts for proper torque at regular maintenance intervals. Consider using a thread-locking compound on case bolts if loosening is recurrent.

Technical Bulletin: Bellhousing Bolt Fatigue

1987-02-28

This bulletin warns of potential bellhousing bolt fatigue from high heat cycles.

1985-1989 Acura Integra

Resolution: Replace original bellhousing bolts with new, high strength bolts of the same size. Adhere to recommended torque specifications. Check bolts every 20,000 miles.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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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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