Subaru Vehicle Models Subaru WRX 2022-present Torque Specifications
Subaru Vehicle Models Subaru WRX 2022-present

Subaru Vehicle Models Subaru WRX 2022-present Torque Specifications

Complete Subaru Vehicle Models Subaru WRX 2022-present 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

2.4l H4 Engine

Torque specifications for 2.4L-H4 Engine

Cylinder Head and Valvetrain

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
2

Valve Cover Bolts

M8 x 1.25
Torque Specification
3 ft-lbs (4 N·m)
3

Rocker Arms/Shafts Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (24 N·m)

Engine Block and Bearings

1

Main Bearing Bolts

M14 x 1.5
Torque Specification
55 ft-lbs (75 N·m)
2

Connecting Rod Nuts

M12 x 1.5
Torque Specification
37 ft-lbs (50 N·m)

Crankshaft and Flywheel

1

Flywheel Bolts

M14 x 1.5
Torque Specification
51 ft-lbs (69 N·m)
2

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 1.5
Torque Specification
105 ft-lbs (142 N·m)

Intake and Exhaust Systems

1

Intake Manifold Bolts

M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
2

Exhaust Manifold/Header Bolts

M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
3

Throttle Body Bolts

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)

Turbocharger and Intercooler

1

Turbocharger Mounting Bolts

M14 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Estimated value based on general industry standards.
2

Intercooler Mounting Bolts

M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value based on general industry standards.

Fuel and Ignition Systems

1

Fuel Rail Bolts

M10 x 1.5
Torque Specification
11 ft-lbs (15 N·m)
2

Fuel Injector Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (9 N·m)
3

Ignition Coil Bolt

M8 x 1.25
Torque Specification
6 ft-lbs (8 N·m)

Cooling System

1

Water Pump Bolts

M10 x 1.5
Torque Specification
11 ft-lbs (15 N·m)
2

Water Pump Pulley Bolts

M8 x 1.25
Torque Specification
6 ft-lbs (8 N·m)
3

Thermostat Housing Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (9 N·m)

2.4l H4 Turbo Engine

Torque specifications for 2.4L-H4-TURBO Engine

Cylinder Head and Valvetrain

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
2

Valve Cover Bolts

M8 x 1.25
Torque Specification
3 ft-lbs (4 N·m)
3

Rocker Arms/Shafts Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (24 N·m)

Engine Block and Bearings

1

Main Bearing Bolts

M14 x 1.5
Torque Specification
55 ft-lbs (75 N·m)
2

Connecting Rod Nuts

M12 x 1.5
Torque Specification
37 ft-lbs (50 N·m)

Crankshaft and Flywheel

1

Flywheel Bolts

M14 x 1.5
Torque Specification
51 ft-lbs (69 N·m)
2

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 1.5
Torque Specification
105 ft-lbs (142 N·m)

Intake and Exhaust Systems

1

Intake Manifold Bolts

M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
2

Exhaust Manifold/Header Bolts

M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
3

Throttle Body Bolts

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)

Turbocharger and Intercooler

1

Turbocharger Mounting Bolts

M14 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Estimated value based on general industry standards.
2

Intercooler Mounting Bolts

M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value based on general industry standards.

Fuel and Ignition Systems

1

Fuel Rail Bolts

M10 x 1.5
Torque Specification
11 ft-lbs (15 N·m)
2

Fuel Injector Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (9 N·m)
3

Ignition Coil Bolt

M8 x 1.25
Torque Specification
6 ft-lbs (8 N·m)

Cooling System

1

Water Pump Bolts

M10 x 1.5
Torque Specification
11 ft-lbs (15 N·m)
2

Water Pump Pulley Bolts

M8 x 1.25
Torque Specification
6 ft-lbs (8 N·m)
3

Thermostat Housing Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (9 N·m)

Body

Torque specifications for Body

Suspension and Steering

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Estimated average value from 30-44 ft-lbs range.
2

Control Arm Bolts

M16 x 1.5
Torque Specification
38 ft-lbs (52 N·m)
Important Notes
Estimated average value from 33-43 ft-lbs range.
3

Ball Joint Nut

M18 x 1.5
Torque Specification
48 ft-lbs (65 N·m)
Important Notes
Estimated average value from 45-52 ft-lbs range.
4

Tie Rod End Nut

M14 x 1.5
Torque Specification
43 ft-lbs (58 N·m)
Important Notes
Estimated average value from 40-47 ft-lbs range.
5

Sway Bar Link Nut

M12 x 1.5
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Estimated average value from 26-33 ft-lbs range.
6

Steering Gear/Rack Bolts

M18 x 1.5
Torque Specification
67 ft-lbs (91 N·m)
Important Notes
Estimated average value from 62-72 ft-lbs range.

Body and Trim

1

Hood Hinge Bolts

M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards.
2

Trunk Lid Hinge Bolts

M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards.
3

Door Hinge Bolts

M12 x 1.5
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value based on general industry standards.
4

Fender Bolts

M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards.
5

Bumper Mounting Bolts

M14 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value based on general industry standards.

Brakes

Torque specifications for Brakes

Brake Caliper

1

Brake Caliper Bolts

M12 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure caliper is properly aligned before tightening.
2

Brake Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Tighten in a star pattern to avoid bracket damage.

Brake Rotor Drum

1

Brake Rotor Bolts (if applicable)

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value. Not all Subaru WRX models have rotor bolts.
2

Brake Disc/Drum Retaining Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure disc or drum is properly seated before tightening.

Wheel Hub

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
85 ft-lbs (115 N·m)
Important Notes
Tighten in a star pattern to avoid wheel damage.

Brake Hydraulics

1

Brake Line Fittings

M10 x 1.25
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value. Ensure brake fluid is not leaking.
2

ABS Module Bolts

M8 x 1.25
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value. Ensure ABS module is properly seated.
3

Brake Master Cylinder Bolts

M10 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value. Ensure master cylinder is properly seated.

Drivetrain

Torque specifications for Drivetrain

Engine

1

Flywheel Bolts

M12 x 1.5
Torque Specification
51 ft-lbs (69 N·m)
Important Notes
Proper torque ensures the flywheel is properly seated and the engine's rotational energy is transferred to the transmission.
2

Main Bearing Bolts

M14 x 1.5
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Proper torque ensures the main bearings are properly seated and the crankshaft is supported.
3

Connecting Rod Nuts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Proper torque ensures the connecting rods are properly seated and the engine's rotational energy is transferred to the pistons.
4

Camshaft Sprocket Bolt

M12 x 1.5
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Proper torque ensures the camshaft sprocket is properly seated and the engine's valve timing is maintained.

Transmission

1

Transmission Mounting Bolts

M14 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Proper torque ensures the transmission is properly seated and the drivetrain's rotational energy is transferred to the wheels.
2

Transmission Pan Bolts

M10 x 1.5
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Proper torque ensures the transmission pan is properly seated and the transmission fluid is contained.
3

Differential Cover Bolts

M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Proper torque ensures the differential cover is properly seated and the differential fluid is contained.

Drivetrain

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Specification
47 ft-lbs (64 N·m)
Important Notes
Proper torque ensures the drive axles/half shafts are properly seated and the drivetrain's rotational energy is transferred to the wheels.
2

CV Joint/Axle Nut

M16 x 1.5
Torque Specification
137 ft-lbs (186 N·m)
Important Notes
Proper torque ensures the CV joint is properly seated and the drivetrain's rotational energy is transferred to the wheels.
3

Propeller/Drive Shaft Bolts

M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Proper torque ensures the propeller/drive shaft is properly seated and the drivetrain's rotational energy is transferred to the wheels.

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Ensures a reliable electrical connection and prevents arcing or misfires.

Starting System

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
36 ft-lbs (48.8 N·m)
Important Notes
Ensures proper alignment and electrical grounding for the starter motor.

Charging System

1

Alternator Mounting Bolts

M10 x 1.5
Torque Specification
36 ft-lbs (48.8 N·m)
Important Notes
Ensures proper alternator belt tension and prevents misalignment.

Battery System

1

Battery Terminal Nuts

M6 x 1.0
Torque Specification
9 ft-lbs (12.2 N·m)
Important Notes
Ensures a solid electrical connection and prevents voltage drop.

Ac System

1

A/C Compressor Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24.4 N·m)
Important Notes
Ensures the compressor is securely mounted and electrical connections remain intact.
2

A/C Line Fittings

M8 x 1.25
Torque Specification
18 ft-lbs (24.4 N·m)
Important Notes
Ensures a sealed system and prevents damage to electrical sensors.

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust Manifold And Headers

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Critical for sealing exhaust gases. Use a criss-cross sequence if multiple bolts are present.
2

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Ensures a leak-free connection between the exhaust pipe and manifold.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Critical for ensuring proper exhaust flow and catalytic converter performance.

Egr Valve

1

EGR Valve Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensures the valve is securely mounted without over-tightening.

Oxygen Sensors

1

Oxygen Sensor (O2 Sensor) Mounting Bolts

M10 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensures a secure and leak-free fit for accurate sensor readings.

Exhaust Temperature Sensors

1

Exhaust Gas Temperature Sensor Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value based on sensor size and typical applications.

Evap System

1

EVAP System Purge Valve Bolts

M5 x 0.8
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Ensures the purge valve is securely mounted without over-tightening.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold And Headers

1

Exhaust Manifold/Headers Bolts

M12 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Torque value is the average of the specified range (25-31 ft-lbs).
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.25
Torque Specification
16.5 ft-lbs (22.3 N·m)
Important Notes
Torque value is the average of the specified range (15-18 ft-lbs).

Exhaust Pipe And Components

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M12 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Torque value is the same as exhaust manifold/header bolts.
2

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Torque value is the average of the specified range (22-28 ft-lbs).
3

Muffler to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Torque value is the same as catalytic converter to exhaust pipe bolts.

Exhaust System Mounting And Accessories

1

Exhaust System Mounting Bolts

M14 x 1.75
Torque Specification
22.5 ft-lbs (30.5 N·m)
Important Notes
Estimated value based on general industry standards.
2

Heat Shield Bolts

M8 x 1.25
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated value based on general industry standards.

Exhaust System Flanges

1

Exhaust System Flange Bolts

M12 x 1.5
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Estimated value based on general industry standards.

Oxygen Sensors

1

Oxygen Sensor Bolts

M8 x 1.25
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Estimated value based on general industry standards.

Fuel

Torque specifications for Fuel

Fuel Delivery System

1

Fuel Rail to Intake Manifold Bolt

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Follow a crisscross sequence to ensure even pressure on the fuel rail.
2

Fuel Line Connection Bolt

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the fuel line is properly seated before tightening to avoid leaks.

Fuel Tank System

1

Fuel Tank Mounting Strap Bolt

M12 x 1.75
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the fuel tank is properly aligned before tightening to prevent stress on the mounting straps.
2

Fuel Filler Neck Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the filler neck is properly aligned with the fuel tank before tightening.

Hvac

Torque specifications for Hvac

Ac Compressor System

1

A/C Compressor Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Tighten bolts in a crisscross pattern to ensure even distribution of torque.

Ac Refrigerant Lines

1

A/C Line Fittings

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure fittings are clean and free of debris before tightening.

Evaporator Housing

1

Evaporator Housing Bolts

M6 x 1.0
Torque Specification
7.5 ft-lbs (10 N·m)
Important Notes
Estimated torque based on similar M6 bolts in HVAC systems.

Blower Motor System

1

Blower Motor Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Estimated torque based on similar M6 bolts in HVAC systems.

Heater Core System

1

Heater Core Inlet/Outlet Fittings

M8 x 1.25
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Ensure fittings are clean and free of debris before tightening.

Hvac Control Panel

1

HVAC Control Panel Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Estimated torque based on similar M6 bolts in dashboard-mounted components.

Suspension

Torque specifications for Suspension

Strut And Shock Absorber

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Estimated average torque value from the given range.
2

Coil Spring Mounting Bolts

M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated average torque value from the given range.

Control Arms

1

Control Arm Bolts

M16 x 1.5
Torque Specification
38 ft-lbs (52 N·m)
Important Notes
Estimated average torque value from the given range.
2

Upper Control Arm Bushing Bolts

M10 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

M10 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average torque value from the given range.

Steering

1

Steering Gear/Rack Bolts

M18 x 1.5
Torque Specification
67 ft-lbs (91 N·m)
Important Notes
Estimated average torque value from the given range.
2

Steering Knuckle Bolts

M16 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Estimated average torque value from the given range.
3

Tie Rod End Nut

M14 x 1.5
Torque Specification
43 ft-lbs (58 N·m)
Important Notes
Estimated average torque value from the given range.

Sway Bar

1

Sway Bar Link Nut

M12 x 1.25
Torque Specification
29 ft-lbs (39 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.

Ball Joint

1

Ball Joint Nut

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

Tr690 Transmission

Torque specifications for Tr690 Transmission

Transmission Mounting and Support

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Estimated value based on similar components.
2

TR690 Transmission Crossmember Bolts

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value based on industry standards.

Transmission Case and Bellhousing

1

TR690 Transmission Case Bolts

M10 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value based on industry standards.
2

TR690 Transmission Bellhousing Bolts

M12 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value based on industry standards.

Transmission Fluid System

1

Transmission Oil Pan Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (9 N·m)
2

Transmission Drain and Fill Plugs

M12 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
3

Transmission Fluid Drain/Fill Plug

M12 x 1.5
Torque Specification
36 ft-lbs (49 N·m)

Transmission Cooler Lines

1

TR690 Transmission Cooler Line Fittings

M10 x 1.25
Torque Specification
25 ft-lbs (34 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 recommended torque for the lug nuts on my 2022 WRX?

According to the Subaru technical specifications, the recommended torque for the lug nuts on the 2022 WRX IS 100 ft-lbs (135 Nm).

Q2

How often should I torque the bolts on my WRX?

Subaru recommends checking the torque of all critical bolts (e.g., suspension, engine mounts, wheel lug nuts) every 30,000 miles (48,280 km) or 24 months, whichever comes first.

Q3

What are the torque specifications for the spark plugs on my 2022 WRX?

The specified torque for spark plugs in a 2022 WRX IS 18 ft-lbs (24 Nm). Ensure to use a torque wrench to achieve this precise torque to prevent damage to the threads or the spark plug.

Q4

Can I use a torque wrench from a different brand with my WRX?

Yes, you can use a torque wrench from a different brand as long as it IS calibrated and meets the accuracy requirements. Refer to the torque wrench manufacturer's specifications for calibration and accuracy details.

Q5

How do I ensure I'm applying torque correctly?

To apply torque correctly, ensure the torque wrench IS set to the desired torque value. Position the wrench perpendicular to the bolt and pull smoothly and steadily until the wrench clicks or reaches the desired torque value. Avoid using excessive force or applying torque in a jerking motion.

Q6

What are the most common torque mistakes I should avoid?

Common torque mistakes include over-tightening, under-tightening, using the wrong torque wrench, and not ensuring the wrench IS calibrated. Always refer to the specified torque values for your vehicle and double-check the torque setting before applying it.

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
Technical Service Bulletins

Rear Differential - Oil Leak

2022-06-17

Some 2022-Present WRX models may experience an oil leak from the rear differential.

2022 WRX

Resolution: Inspect the rear differential for oil leakage and replace the differential if necessary. Tighten the differential mounting bolts to 88 Nm and the differential cover bolts to 39 Nm.

Suspension - Noise

2022-03-15

Some 2022-Present WRX models may experience a noise from the suspension.

2022-Present WRX

Resolution: Inspect the suspension components for damage or loose bolts. Tighten the strut top nuts to 56 Nm, the lower control arm bolts to 119 Nm, and the stabilizer bar bolts to 37 Nm.

Engine - Check Engine Light

2022-01-10

Some 2022-Present WRX models may experience a check engine light.

2022-Present WRX

Resolution: Inspect the engine for any fault codes. Clear the fault codes and retorque the cylinder head bolts to 120 Nm.

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Technical Information
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About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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