Subaru Subaru Forester 2019-present Drivetrain Bolt Torque Specifications & Fastener Values
Subaru Subaru Forester 2019-present

Subaru Subaru Forester 2019-present Drivetrain Bolt Torque Specifications

Detailed drivetrain bolt torque specifications for the 2019-Present Subaru Forester, including transmission, transfer case, 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 and transmission mounting

Components that secure the engine and transmission to the vehicle frame or engine block.

1

Transmission Mounting Bolts

M14 x 1.5
Torque Value
36 ft-lbs (48.9 N·m)
2

Engine Block to Transmission Bolts

M12 x 1.25
Torque Value
30 ft-lbs (40.7 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.

Flywheel and crankshaft

Components that secure the flywheel to the crankshaft.

1

Flywheel Bolts

M16 x 1.5
Torque Value
51 ft-lbs (69.3 N·m)

Transmission and drive axle

Components that secure the transmission to the drive axle.

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Value
44 ft-lbs (59.7 N·m)
2

Drive Axle/Half Shaft Nut

M20 x 1.5
Torque Value
70 ft-lbs (94.9 N·m)

Cv joint and axle

Components that secure the CV joint to the axle.

1

CV Joint/Axle Nut

M24 x 1.5
Torque Value
150 ft-lbs (203 N·m)

Differential and transfer case

Components that secure the differential and transfer case.

1

Differential Drain/Fill Plug

M12 x 1.25
Torque Value
36 ft-lbs (48.9 N·m)
2

Transfer Case Drain/Fill Plug

M12 x 1.25
Torque Value
36 ft-lbs (48.9 N·m)

Sensors and electronics

Components that secure sensors and electronics to the engine block or transmission.

1

Crankshaft Position Sensor Bolt

M8 x 1.25
Torque Value
10 ft-lbs (13.6 N·m)
Important Notes
Estimated value based on industry standards.
2

Camshaft Position Sensor Bolt

M8 x 1.25
Torque Value
10 ft-lbs (13.6 N·m)
Important Notes
Estimated value based on industry standards.

Cooling system

Components that secure the transmission cooler lines to the transmission and radiator.

1

Transmission Cooler Line Fittings

M10 x 1.25
Torque Value
15 ft-lbs (20.3 N·m)
Important Notes
Estimated value based on industry standards.

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 importance of proper torque specs for drivetrain bolts?

Proper torque specs ensure the drivetrain components are securely fastened, preventing damage, wear, and potential failure. Incorrect torque can lead to loose or over-tightened bolts, causing vibrations, noise, and reduced performance.

Q2

How often should I check and maintain the drivetrain bolts?

It's recommended to check the drivetrain bolts every 12,000 to 15,000 miles or as specified in your owner's manual. Regular maintenance includes inspecting for signs of wear, corrosion, or damage, and re-torquing the bolts as needed.

Q3

Can I use a torque wrench with a socket extension to tighten drivetrain bolts?

Yes, but ensure the extension is securely attached to the torque wrench and the socket is properly seated on the bolt head. This will help prevent damage to the bolt or surrounding components.

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 for applying accurate torque values

  • Digital display
  • Adjustable torque range
Learn more

Socket Set

A set of sockets for various bolt sizes

  • Metric and SAE sizes
  • Chrome vanadium steel construction
Learn more

Breaker Bar

A long, flexible bar for applying extra torque

  • High-strength steel construction
  • Comfort grip handle
Learn more
Service Procedures

Drivetrain Bolt Torque Specification

A step-by-step guide to applying the correct torque values to drivetrain bolts

  • Locate the drivetrain bolts and ensure they are clean and free of debris
  • Apply the recommended torque value using a torque wrench
  • Double-check the torque value to ensure accuracy
View full procedure

Drivetrain System Inspection

A step-by-step guide to inspecting the drivetrain system for damage or wear

  • Visually inspect the drivetrain components for signs of damage or wear
  • Check the drivetrain fluid levels and condition
  • Test the drivetrain system for proper function
View full procedure
Technical Service Bulletins

Drivetrain Bolt Torque Specification Update

2020-02-15

An update to the drivetrain bolt torque specification for 2019-Present Subaru Forester models

2019-2022 Subaru Forester

Resolution: Update the torque specification to 30 ft-lbs for all drivetrain bolts

Drivetrain System Noise

2021-08-01

A technical bulletin addressing drivetrain system noise on 2019-Present Subaru Forester models

2019-2022 Subaru Forester

Resolution: Inspect and replace the drivetrain system components as necessary

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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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.
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