Subaru Subaru Crosstrek 2018-present Drivetrain Bolt Torque Specifications & Fastener Values
Subaru Subaru Crosstrek 2018-present

Subaru Subaru Crosstrek 2018-present Drivetrain Bolt Torque Specifications

Detailed drivetrain bolt torque specifications for the 2018-Present Subaru Crosstrek, including transmission, transfer case, and driveshaft 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 Assembly

Components that make up the engine assembly, including the crankshaft, bearings, and flywheel.

1

Main Bearing Bolts

M10 x 1.25
Torque Value
54 ft-lbs (73 N·m)
Important Notes
Torque sequence is critical for proper bearing alignment.
2

Flywheel Bolts

M10 x 1.25
Torque Value
54 ft-lbs (73 N·m)
Important Notes
Ensure flywheel is properly aligned before tightening.
3

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Value
116 ft-lbs (157 N·m)
Important Notes
Ensure pulley is properly seated before tightening.
4

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Value
32 ft-lbs (43 N·m)
Important Notes
Ensure tensioner is properly adjusted before tightening.

Transmission Assembly

Components that make up the transmission assembly, including mounting points and oil pan.

1

Transmission Mounting Bolts

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

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
4.7 ft-lbs (6.4 N·m)
Important Notes
Use a crisscross pattern to ensure even sealing.

Driveline Components

Components that transfer power from the transmission to the wheels, including drive axles, CV joints, and propeller shafts.

1

Drive Axle/Half Shaft Bolts

M10 x 1.25
Torque Value
54 ft-lbs (73 N·m)
Important Notes
Ensure axle is properly seated before tightening.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Value
145 ft-lbs (196 N·m)
Important Notes
Ensure CV joint is properly seated before tightening.
3

Propeller/Drive Shaft Bolts

M10 x 1.25
Torque Value
48 ft-lbs (65 N·m)
Important Notes
Ensure drive shaft is properly aligned before tightening.

Differential Assembly

Components that make up the differential assembly, including drain and fill plugs.

1

Differential Drain/Fill Plug

M12 x 1.5
Torque Value
32 ft-lbs (43 N·m)
Important Notes
Ensure plug threads are clean and undamaged before installation.

Additional Components

Additional critical components that support the drivetrain system.

1

Engine Block to Crankshaft Bolts

M12 x 1.25
Torque Value
70 ft-lbs (95 N·m)
Important Notes
Estimated value based on similar components. Ensure crankshaft is properly aligned before tightening.
2

Transmission Crossmember Bolts

M10 x 1.25
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on similar components. Ensure crossmember is properly aligned before tightening.

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 recommended torque specification for the drivetrain bolts on a 2018-Present Subaru Crosstrek?

The recommended torque specification for the drivetrain bolts on a 2018-Present Subaru Crosstrek varies depending on the specific bolt and location. However, here are some general torque specifications: Front differential mounting bolts: 43 ft-lbs, Rear differential mounting bolts: 43 ft-lbs, Transmission mounting bolts: 32 ft-lbs, and Transfer case mounting bolts: 32 ft-lbs. It's essential to consult the owner's manual or a repair manual for specific torque specifications.

Q2

Why is it important to follow the recommended torque specifications for drivetrain bolts?

Following the recommended torque specifications for drivetrain bolts is crucial to ensure the longevity and reliability of the drivetrain system. Over-torquing can damage the bolts, while under-torquing can lead to loose connections, causing vibrations, noise, and potentially catastrophic failure. Proper torque specifications also help maintain the correct preload on bearings and other components.

Q3

How often should I check and maintain the drivetrain bolts on my Subaru Crosstrek?

It's recommended to check the drivetrain bolts every 12,000 to 15,000 miles, or as specified in the owner's manual. Additionally, if you notice any unusual vibrations, noises, or leaks, inspect the drivetrain bolts immediately. Regular maintenance, such as cleaning and lubricating the bolts, can help prevent corrosion and ensure smooth operation.

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 torque wrench for applying accurate torque values

  • Range: 10-100 ft-lbs
  • Accuracy: ±2%
Learn more

Socket Set

A set of sockets for drivetrain bolts

  • Sizes: 10mm, 12mm, 14mm
  • Drive type: 3/8" and 1/2"
Learn more

Breaker Bar

A long-handled breaker bar for applying high torque values

  • Length: 24"
  • Drive type: 1/2"
Learn more
Service Procedures

Drivetrain Bolt Torque Specification

Procedure for applying correct torque values to drivetrain bolts

  • Locate the drivetrain bolts
  • Clean the bolts and surrounding area
  • Apply the correct torque value using a torque wrench
  • Verify the torque value using a secondary torque wrench
View full procedure

Drivetrain Bolt Replacement

Procedure for replacing drivetrain bolts

  • Remove the old bolt
  • Inspect the bolt hole and surrounding area
  • Install the new bolt
  • Apply the correct torque value using a torque wrench
View full procedure
Technical Service Bulletins

Drivetrain Bolt Torque Specification Update

2020-02-15

Update to the drivetrain bolt torque specification for 2018-2020 model year Crosstrek vehicles

2018-2020 Crosstrek

Resolution: Update the torque specification to 30 ft-lbs for the front differential bolts

Drivetrain Bolt Failure

2019-05-01

Investigation into drivetrain bolt failures on 2018-2019 model year Crosstrek vehicles

2018-2019 Crosstrek

Resolution: Inspect the drivetrain bolts for signs of wear or damage and replace as necessary

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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