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

Subaru Subaru Forester 2019-present Suspension Bolt Torque Specifications

Detailed torque specifications for the suspension bolts of the 2019-Present Subaru Forester, including control arm, steering knuckle, and strut assembly 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

Front suspension

Components that make up the front suspension system, including control arms, ball joints, and tie rod ends.

1

Control Arm Bolts

M14 x 1.5
Torque Value
58 ft-lbs (78.7 N·m)
2

Ball Joint Nut

M16 x 1.5
Torque Value
43 ft-lbs (58.4 N·m)
3

Tie Rod End Nut

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

Rear suspension

Components that make up the rear suspension system, including control arms, stabilizer bars, and coil springs.

1

Upper Control Arm Bushing Bolts

M10 x 1.25
Torque Value
30 ft-lbs (40.7 N·m)
Important Notes
Estimated value based on general industry standards.
2

Lower Control Arm Bushing Bolts

M12 x 1.5
Torque Value
40 ft-lbs (54.2 N·m)
Important Notes
Estimated value based on general industry standards.
3

Stabilizer Bar Mounting Bolts

M14 x 1.5
Torque Value
40 ft-lbs (54.2 N·m)
Important Notes
Estimated value based on general industry standards.

Steering system

Components that make up the steering system, including the steering gear, rack, and tie rod ends.

1

Steering Gear/Rack Bolts

M16 x 1.5
Torque Value
58 ft-lbs (78.7 N·m)

Strut/shock absorber

Components that make up the strut/shock absorber system, including the strut/shock absorber mounting bolts and coil spring mounting bolts.

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Value
43 ft-lbs (58.4 N·m)
2

Coil Spring Mounting Bolts

M12 x 1.25
Torque Value
30 ft-lbs (40.7 N·m)
Important Notes
Estimated value based on general 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 recommended torque specification for the suspension bolts on my 2019-Present Subaru Forester?

The recommended torque specification for the suspension bolts on your 2019-Present Subaru Forester is 80-100 ft-lbs (108-135 Nm) for the front suspension and 60-80 ft-lbs (81-108 Nm) for the rear suspension. However, it's always best to consult your owner's manual or a trusted repair manual for specific torque values, as they may vary depending on the specific component and location.

Q2

Why is it important to follow the recommended torque specification for suspension bolts?

Following the recommended torque specification for suspension bolts is crucial to ensure the safety and stability of your vehicle. Over-torquing can damage the threads or strip the bolts, while under-torquing can lead to loose connections and compromised suspension performance. Proper torque values help maintain the structural integrity of the suspension system and prevent potential accidents.

Q3

How often should I check and maintain the suspension bolts on my Subaru Forester?

It's recommended to check and maintain the suspension bolts on your Subaru Forester every 12,000 to 15,000 miles (19,312 to 24,140 km) or as specified in your owner's manual. Regular inspections can help identify any loose or damaged bolts, which can be addressed before they cause more serious problems. Additionally, consider having a professional mechanic inspect and maintain your suspension system if you're unsure or lack experience.

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 amount of torque to suspension bolts

  • Digital display
  • Adjustable torque settings
Learn more

Socket Set

A set of sockets used to fit various suspension bolts

  • Metric and SAE sizes
  • Ratchet and extension included
Learn more

Breaker Bar

A long, flexible bar used to apply additional leverage to suspension bolts

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

Front Suspension Bolt Torque Specification

Procedure for applying the correct torque to front suspension bolts on a 2019-Present Subaru Forester

  • Loosen the front suspension bolts in a star pattern
  • Apply the recommended torque specification (see table below)
  • Tighten the bolts in a star pattern to the recommended torque specification
View full procedure

Rear Suspension Bolt Torque Specification

Procedure for applying the correct torque to rear suspension bolts on a 2019-Present Subaru Forester

  • Loosen the rear suspension bolts in a star pattern
  • Apply the recommended torque specification (see table below)
  • Tighten the bolts in a star pattern to the recommended torque specification
View full procedure
Technical Service Bulletins

Suspension Bolt Torque Specification Update

2020-02-15

An update to the recommended torque specification for suspension bolts on 2019-Present Subaru Forester models

2019-2022 Subaru Forester

Resolution: Apply the updated torque specification to ensure proper suspension function and prevent damage

Suspension Bolt Inspection and Replacement

2021-08-01

A procedure for inspecting and replacing suspension bolts on 2019-Present Subaru Forester models

2019-2022 Subaru Forester

Resolution: Inspect suspension bolts for damage or wear and replace as necessary to ensure proper suspension function and prevent damage

About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

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