Mitsubishi Mitsubishi Eclipse 1990-1994 Drivetrain Bolt Torque Specifications & Fastener Values
Mitsubishi Mitsubishi Eclipse 1990-1994

Mitsubishi Mitsubishi Eclipse 1990-1994 Drivetrain Bolt Torque Specifications

Detailed torque specifications for the drivetrain components of the 1990-1994 Mitsubishi Eclipse, including transmission, driveshaft, and differential 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

Engine block and crankshaft

Components that secure the crankshaft to the engine block and support its operation.

1

Flywheel Bolts

M12 x 1.5
Torque Value
68 ft-lbs (92 N·m)
Important Notes
Estimated average torque value from the given range.
2

Main Bearing Bolts

M14 x 1.5
Torque Value
68 ft-lbs (92 N·m)
Important Notes
Estimated average torque value from the given range.

Crankshaft and camshaft

Components that secure the crankshaft and camshaft sprockets.

1

Connecting Rod Nuts

M10 x 1.25
Torque Value
24 ft-lbs (33 N·m)
Important Notes
Estimated average torque value from the given range.
2

Camshaft Sprocket Bolt

M12 x 1.5
Torque Value
68 ft-lbs (92 N·m)
Important Notes
Estimated average torque value from the given range.

Crankshaft pulley and harmonic balancer

Components that secure the crankshaft pulley and harmonic balancer.

1

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 1.5
Torque Value
127 ft-lbs (172 N·m)
Important Notes
Estimated average torque value from the given range.

Transmission and mounting

Components that secure the transmission to the engine block or transmission crossmember.

1

Transmission Mounting Bolts

M12 x 1.5
Torque Value
42 ft-lbs (57 N·m)
Important Notes
Estimated average torque value from the given range.
2

Engine Block to Transmission Bellhousing Bolts

M14 x 1.5
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Estimated average torque value from the given range.
3

Transmission Crossmember Bolts

M12 x 1.5
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Estimated average torque value from the given range.

Drive axle and half shaft

Components that secure the drive axles and half shafts to the transmission or differential.

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Value
65 ft-lbs (88 N·m)
Important Notes
Estimated average torque value from the given range.
2

Drive Axle/Half Shaft Nut

M16 x 1.5
Torque Value
110 ft-lbs (149 N·m)
Important Notes
Estimated average torque value from the given range.

Cv joint and axle

Components that secure the CV joints to the drive axles.

1

CV Joint/Axle Nut

M16 x 1.5
Torque Value
141 ft-lbs (191 N·m)
Important Notes
Estimated average torque value from the given range.

Propeller and drive shaft

Components that secure the propeller/drive shaft to the transmission or differential.

1

Propeller/Drive Shaft Bolts

M10 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Estimated average torque value from the given range.

Transmission oil pan

Components that secure the transmission oil pan to the transmission.

1

Transmission Oil Pan Bolts

M8 x 1.25
Torque Value
88 ft-lbs (12 N·m)
Important Notes
Estimated average torque value from the given range.

Differential

Components that secure the differential cover to the differential.

1

Differential Cover Bolts

M10 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Estimated average torque value from the given range.

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

What is the torque specification for the axle nut on a 1990-1994 Mitsubishi Eclipse?

The axle nut torque specification for the 1990-1994 Mitsubishi Eclipse is typically 145-174 ft-lbs (197-236 Nm). Always refer to the manufacturer's service manual for your specific model and drivetrain configuration.

Q2

How often should I check the torque on drivetrain components?

It is recommended to check the torque on critical drivetrain components, such as axle nuts, driveshaft bolts, and transmission mounts, during routine maintenance or after any drivetrain repair. For example, after replacing a CV axle, recheck the axle nut torque after driving 50-100 miles to ensure it remains secure.

Q3

Can I reuse drivetrain bolts, or should they be replaced?

Some drivetrain bolts, such as axle nuts, are designed for one-time use and should be replaced after removal. Others, like transmission mounting bolts, can often be reused if they are in good condition and not stretched or damaged. Always consult the service manual for specific guidance.

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

A precision tool used to apply a specific torque to a fastener such as a nut or bolt.

  • Adjustable torque settings
  • Durable construction
Learn more

Socket Set

A set of sockets in various sizes to fit different bolts and nuts.

  • Includes both metric and standard sizes
  • Durable chrome vanadium construction
Learn more

Breaker Bar

A long-handled tool used to loosen tight bolts and nuts.

  • High torque application
  • Durable steel construction
Learn more
Service Procedures

Drivetrain Bolt Torque Specifications

Detailed steps to properly torque the drivetrain bolts on a 1990-1994 Mitsubishi Eclipse.

  • Ensure the vehicle is on a flat surface and securely lifted using a jack and jack stands.
  • Locate the drivetrain bolts, including transmission-to-engine bolts, driveshaft bolts, and differential bolts.
  • Clean the bolt threads and apply a small amount of thread locker if specified.
  • Using a torque wrench, tighten the bolts to the manufacturer's specified torque settings. Refer to the torque specifications chart for exact values.
  • Double-check each bolt to ensure proper torque application.
View full procedure
Technical Service Bulletins

Drivetrain Bolt Torque Specification Update

1992-05-15

Updated torque specifications for drivetrain bolts to prevent loosening and ensure proper assembly.

1990-1994 Mitsubishi Eclipse

Resolution: Apply the updated torque specifications as outlined in the bulletin. Ensure all bolts are torqued in the correct sequence.

Driveshaft Bolt Failure Investigation

1993-08-20

Investigation into reports of driveshaft bolt failures due to improper torque application.

1990-1994 Mitsubishi Eclipse

Resolution: Inspect all driveshaft bolts for proper torque and replace any damaged or worn bolts. Follow the updated torque specifications provided in the bulletin.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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