Subaru Vehicle Models Subaru WRX 2008-2014 Torque Specifications
Subaru Vehicle Models Subaru WRX 2008-2014

Subaru Vehicle Models Subaru WRX 2008-2014 Torque Specifications

Complete Subaru Vehicle Models Subaru WRX 2008-2014 torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.

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

2.5l H4 Engine

Torque specifications for 2.5L-H4 Engine

Engine Block

1

Main Bearing Bolts

M12 x 1.5
Torque Specification
47.5 ft-lbs (64.5 N·m)
Important Notes
Critical for crankshaft alignment. Torque evenly and follow the manufacturer's sequence.

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Critical for head gasket integrity. Torque evenly and follow the manufacturer's sequence.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
5 ft-lbs (6.8 N·m)
Important Notes
Prevents oil leaks. Torque evenly in a crisscross pattern.

Turbocharger

1

Turbocharger-to-Exhaust Manifold Bolts

M8 x 1.25
Torque Specification
27 ft-lbs (36.6 N·m)
Important Notes
Ensures proper exhaust flow. Torque evenly and follow the manufacturer's sequence.
2

Turbocharger Oil Feed Line Bolt

M6 x 1.0
Torque Specification
15 ft-lbs (20.3 N·m)
Important Notes
Prevents oil leaks. Torque evenly.

2.5l H4 Turbo Engine

Torque specifications for 2.5L-H4-TURBO Engine

Engine Block

1

Main Bearing Bolts

M12 x 1.5
Torque Specification
47.5 ft-lbs (64.5 N·m)
Important Notes
Critical for crankshaft alignment. Torque evenly and follow the manufacturer's sequence.

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Critical for head gasket integrity. Torque evenly and follow the manufacturer's sequence.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
5 ft-lbs (6.8 N·m)
Important Notes
Prevents oil leaks. Torque evenly in a crisscross pattern.

Turbocharger

1

Turbocharger-to-Exhaust Manifold Bolts

M8 x 1.25
Torque Specification
27 ft-lbs (36.6 N·m)
Important Notes
Ensures proper exhaust flow. Torque evenly and follow the manufacturer's sequence.
2

Turbocharger Oil Feed Line Bolt

M6 x 1.0
Torque Specification
15 ft-lbs (20.3 N·m)
Important Notes
Prevents oil leaks. Torque evenly.

5eat Transmission

Torque specifications for 5eat Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
52.5 ft-lbs (71.1 N·m)
Important Notes
Average torque value used. Always follow the specified torque sequence.

Oil Pan

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
0.6 ft-lbs (0.8 N·m)
Important Notes
Torque value converted from inch-lbs to ft-lbs. Use a torque wrench calibrated for low torque.

Fluid Plugs

1

Transmission Drain and Fill Plugs

M16 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Average torque value used. Ensure the threads are clean before installation.

Drive Axle

1

Drive Axle/Half Shaft Bolts

M12 x 1.5
Torque Specification
52.5 ft-lbs (71.1 N·m)
Important Notes
Average torque value used. Follow the specified torque sequence.

Cv Joint

1

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
166.5 ft-lbs (226 N·m)
Important Notes
Average torque value used. Ensure the nut is fully seated before torquing.

Drive Shaft

1

Propeller/Drive Shaft Bolts

M8 x 1.25
Torque Specification
26 ft-lbs (35.2 N·m)
Important Notes
Average torque value used. Follow the specified torque sequence.

Body

Torque specifications for Body

Suspension

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Estimated average value from the provided range.
2

Control Arm Bolts

M16 x 1.5
Torque Specification
52.5 ft-lbs (71 N·m)
Important Notes
Estimated average value from the provided range.
3

Ball Joint Nut

M18 x 1.5
Torque Specification
47 ft-lbs (64 N·m)
Important Notes
Estimated average value from the provided range.
4

Tie Rod End Nut

M12 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Estimated average value from the provided range.
5

Sway Bar Link Nut

M10 x 1.5
Torque Specification
25.5 ft-lbs (35 N·m)
Important Notes
Estimated average value from the provided range.

Steering

1

Steering Gear/Rack Bolts

M14 x 1.5
Torque Specification
39.5 ft-lbs (54 N·m)
Important Notes
Estimated average value from the provided range.

Body

1

Body Mount Bolts

M16 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value based on general industry standards.
2

Door Hinge Bolts

M10 x 1.5
Torque Specification
22.5 ft-lbs (31 N·m)
Important Notes
Estimated value based on general industry standards.
3

Trunk Lid Hinge Bolts

M10 x 1.5
Torque Specification
22.5 ft-lbs (31 N·m)
Important Notes
Estimated value based on general industry standards.
4

Hood Hinge Bolts

M10 x 1.5
Torque Specification
22.5 ft-lbs (31 N·m)
Important Notes
Estimated value based on general industry standards.

Brakes

Torque specifications for Brakes

Brake Caliper

1

Brake Caliper Bolts

M10 x 1.25
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Torque value is an average of the range 58-72 ft-lbs (78-98 Nm).
2

Brake Caliper Mounting Bracket Bolts

M12 x 1.5
Torque Specification
92 ft-lbs (125 N·m)
Important Notes
Torque value is an average of the range 88-96 ft-lbs (119-130 Nm).

Brake Rotor Drum

1

Brake Disc/Drum Retaining Bolts

M8 x 1.25
Torque Specification
55 ft-lbs (74 N·m)
Important Notes
Torque value is an average of the range 51-58 ft-lbs (69-78 Nm).

Brake Hydraulics

1

Brake Hose Banjo Bolt

M10 x 1.0
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque value is an average of the range 18-22 ft-lbs (24-30 Nm).
2

Brake Bleeder Valve

M8 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Torque value is an average of the range 10-12 ft-lbs (14-16 Nm).
3

Brake Master Cylinder Mounting Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Torque value is an average of the range 14-18 ft-lbs (19-24 Nm).
4

Brake Booster Mounting Bolts

M10 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque value is an average of the range 18-22 ft-lbs (24-30 Nm).

Wheel Assembly

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Torque value is an average of the range 72-87 ft-lbs (98-118 Nm).

Drivetrain

Torque specifications for Drivetrain

Engine To Transmission Connection

1

Flywheel Bolts

M12 x 1.5
Torque Specification
52.5 ft-lbs (71.25 N·m)
Important Notes
Estimated average value between 50-55 ft-lbs (68-75 nm)

Transmission Mounting

1

Transmission Mounting Bolts

M14 x 1.5
Torque Specification
52.5 ft-lbs (71.25 N·m)
Important Notes
Estimated average value between 47-58 ft-lbs (64-78 nm)

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M10 x 1.5
Torque Specification
82 ft-lbs (11.125 N·m)
Important Notes
Estimated average value between 69-95 inch-lbs (8-11 nm)

Drivetrain Axles and Shafts

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Specification
52.5 ft-lbs (71.25 N·m)
Important Notes
Estimated average value between 47-58 ft-lbs (64-78 nm)
2

CV Joint/Axle Nut

M20 x 1.5
Torque Specification
166.5 ft-lbs (226.125 N·m)
Important Notes
Estimated average value between 145-188 ft-lbs (197-255 nm)

Differential and Transfer Case

1

Differential Drain/Fill Plug

M12 x 1.5
Torque Specification
39.5 ft-lbs (53.625 N·m)
Important Notes
Estimated average value between 36-43 ft-lbs (49-58 nm)
2

Transfer Case Drain/Fill Plug

M12 x 1.5
Torque Specification
32.5 ft-lbs (44.0625 N·m)
Important Notes
Estimated average value between 29-36 ft-lbs (39-49 nm)

Electrical

Torque specifications for Electrical

Battery System

1

Battery Terminal Nuts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Ensure terminals are clean and free of corrosion before tightening.
2

Grounding Point Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on typical grounding point requirements.

Charging System

1

Alternator Mounting Bolts

M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the alternator is properly aligned with the drive belt before tightening.

Starting System

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the starter motor is properly aligned with the flywheel before tightening.

Ignition System

1

Ignition Coil Bolt

M6 x 1.0
Torque Specification
7.5 ft-lbs (10 N·m)
Important Notes
Ensure the ignition coil is properly seated on the spark plug before tightening.

Wiring And Electrical

1

Fuse Box/Relay Panel Mounting Bolts

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Estimated value based on typical fuse box mounting requirements.
2

Wiring Harness Mounting Bolts/Clips

M4 x 0.7
Torque Specification
3 ft-lbs (4 N·m)
Important Notes
Estimated value based on typical wiring harness mounting requirements.

Emissions Sensors

Torque specifications for Emissions_sensors

Emissions Control

1

EGR Valve Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20.34 N·m)
Important Notes
Ensure even tightening following a cross pattern for proper sealing.
2

Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
27 ft-lbs (36.61 N·m)
Important Notes
Use a crisscross pattern for even tightening to prevent warping or leaks.
3

Oxygen Sensor Threads

M18 x 1.5
Torque Specification
35 ft-lbs (47.45 N·m)
Important Notes
Estimated value. Apply anti-seize compound to the threads to prevent seizing.
4

Catalytic Converter Mounting Bolts

M10 x 1.25
Torque Specification
27.5 ft-lbs (37.29 N·m)
Important Notes
Estimated value. Ensure gaskets are properly aligned before tightening.
5

PCV Valve Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (10.85 N·m)
Important Notes
Ensure the valve is seated correctly before tightening.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold Headers

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Torque value is an estimate based on similar components and bolt sizes.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque value is an estimate based on similar components and bolt sizes.

Exhaust Pipe Assembly

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Torque value is an estimate based on similar components and bolt sizes.
2

Catalytic Converter to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
23 ft-lbs (31 N·m)
Important Notes
Torque value is an estimate based on similar components and bolt sizes.
3

Muffler to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Torque value is an estimate based on similar components and bolt sizes.

Exhaust Mounting And Accessories

1

Exhaust Hanger Bolts

M6 x 1.0
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Torque value is an estimate based on similar components and bolt sizes.
2

Exhaust Heat Shield Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Torque value is an estimate based on similar components and bolt sizes.

Oxygen Sensors

1

Oxygen Sensor Fasteners

M12 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Torque value is an estimate based on similar components and bolt sizes.

Fuel

Torque specifications for Fuel

Fuel Delivery System

1

Fuel Rail Bolts

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Ensures secure attachment of the fuel rail to the intake manifold. Prevents leaks and maintains system pressure.
2

Fuel Injector Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Secures fuel injectors in place. Prevents fuel leaks and ensures consistent fuel flow.
3

Fuel Pump Mounting Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensures the fuel pump is securely mounted in the fuel tank. Prevents leaks and ensures efficient operation.
4

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Secures the fuel tank to the vehicle chassis. Prevents movement that could damage fuel lines.
5

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensures a secure connection between the fuel filler neck and the vehicle body. Prevents leaks.
6

Fuel Filter Bolt/Nut

M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Secures the fuel filter in place. Ensures proper sealing and fuel flow.
7

Fuel Pressure Regulator Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Ensures the fuel pressure regulator is securely attached. Prevents leaks and maintains fuel pressure.
8

Fuel Line Fittings

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Secures fuel line connections to components. Prevents leaks and maintains fuel pressure.

Hvac

Torque specifications for Hvac

Compressor Subsystem

1

A/C Compressor Mounting Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure the compressor is aligned properly before torquing.
2

A/C Line Fittings

M10 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure O-rings are properly seated before torquing.

Heater Core Subsystem

1

Heater Core Housing Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Estimated value based on similar components.

Blower Motor Subsystem

1

Blower Motor Mounting Bolts

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Estimated value based on similar components.

Evaporator Core Subsystem

1

Evaporator Core Housing Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Estimated value based on similar components.

Air Distribution Subsystem

1

Air Distribution Duct Flange Bolts

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Estimated value based on similar components.

Suspension

Torque specifications for Suspension

Strut And Shock Absorber

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Estimated average torque value from the given range.

Control Arms

1

Control Arm Bolts

M16 x 1.5
Torque Specification
52.5 ft-lbs (71 N·m)
Important Notes
Estimated average torque value from the given range.
2

Upper Control Arm Bushing Bolts

M12 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average torque value from the given range.
3

Lower Control Arm Bushing Bolts

M12 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average torque value from the given range.

Ball Joints And Tie Rods

1

Ball Joint Nut

M18 x 1.5
Torque Specification
47 ft-lbs (64 N·m)
Important Notes
Estimated average torque value from the given range.
2

Tie Rod End Nut

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

Sway Bar And Stabilizer Bar

1

Sway Bar Link Nut

M12 x 1.25
Torque Specification
25.5 ft-lbs (35 N·m)
Important Notes
Estimated average torque value from the given range.
2

Stabilizer Bar Mounting Bolts

M14 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated average torque value from the given range.

Steering Gear And Knuckle

1

Steering Gear/Rack Bolts

M16 x 1.5
Torque Specification
39.5 ft-lbs (53 N·m)
Important Notes
Estimated average torque value from the given range.
2

Steering Knuckle Bolts

M18 x 1.5
Torque Specification
75 ft-lbs (102 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 are the torque specifications for the Subaru WRX 2008-2014 lug nuts?

Lug nuts must be tightened to 80 ft-lbs using a torque wrench. Refer to the Subaru technical manual for specific tightening patterns.

Q2

How do I properly measure torque using a torque wrench?

Ensure the torque wrench IS calibrated and set to the desired torque value. Place the wrench socket over the bolt and tighten it gradually until the wrench clicks or the torque value IS reached. Avoid over-tightening.

Q3

What torque values must be applied for the oil pan drain plug?

The oil pan drain plug should be tightened to 23 ft-lbs. Refer to the Subaru service manual for any updates or deviations for specific model years.

Q4

How do I torque head bolts on the Subaru WRX 2008-2014?

Refer to the Subaru workshop manual for precise head bolt torque values and tightening procedures. It involves multiple stages with specific torque sequences and angles.

Q5

What tools and techniques are recommended for accurate torque application?

Use a calibrated torque wrench that meets or exceeds Subaru specifications. Clean and lubricate threads according to manufacturer recommendations. Follow the tightening sequence and torque values precisely.

Q6

How often should torque be checked on critical components?

Critical components such as lug nuts, cylinder head bolts, and other high-stress parts should be inspected and torqued according to Subaru maintenance schedules or when specified by a qualified mechanic.

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

Digital Torque Wrench (10-100 Nm)

Essential for tightening fasteners to precise torque specifications, preventing damage and ensuring proper assembly. This range IS suitable for many applications on the WRX.

  • Digital display for accurate readings
  • Audible alarm when target torque IS reached
  • Multiple units (Nm, ft-lb, in-lb)
  • Reversible ratcheting mechanism
Learn more
Service Procedures

Engine Bolt Torque Specifications

Detailed procedure for tightening engine bolts to specified torque values on the Subaru WRX

  • Locate and identify the engine bolts.
  • Clean the bolt threads and mating surfaces.
  • Apply a small amount of thread locker to the bolt threads.
  • Tighten the bolts to the specified torque values using a digital torque wrench.
  • Double-check the torque values to ensure accuracy.
View full procedure

Suspension Bolt Torque Specifications

Technical guide for tightening suspension components to proper torque values on the Subaru WRX

  • Identify and locate the suspension bolts.
  • Clean the bolt threads and mating surfaces.
  • Apply a small amount of anti-seize lubricant to the bolt threads.
  • Tighten the bolts to the specified torque values using a torque wrench.
  • Re-check the torque values to ensure accuracy.
View full procedure
Technical Service Bulletins

Updated Torque Specifications for Wheel Lug Nuts

2010-06-15

Technical bulletin issued by Subaru regarding updated torque specifications for the wheel lug nuts on 2008-2014 WRX models.

2008-2014 WRX

Resolution: The torque specification for the wheel lug nuts has been updated to 100 Nm (74 lb-ft). Dealers are advised to update their records and ensure that all technicians are aware of the updated specification.

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

Automotive Technical Specialist

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