Subaru Vehicle Models Subaru WRX 2014-2021 Torque Specifications
Subaru Vehicle Models Subaru WRX 2014-2021

Subaru Vehicle Models Subaru WRX 2014-2021 Torque Specifications

Complete Subaru Vehicle Models Subaru WRX 2014-2021 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

2.0l H4 Engine

Torque specifications for 2.0L-H4 Engine

Cylinder Head

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 44 ft-lbs (60 N·m) 3. 90°
Important Notes
Follow the specified torque sequence in the service manual. Tighten in multiple steps.

Crankshaft Bearings

1

Crankshaft Bearing Cap Bolts

M10 x 1.25
Torque Specification
58 ft-lbs (79 N·m)
Important Notes
Ensure all bearing surfaces are clean and lubricated before installation.

Timing Cover

1

Timing Cover Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Tighten bolts in a crisscross pattern to ensure even pressure on the gasket.

Turbocharger

1

Turbocharger Mounting Bolts

M10 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the turbocharger is properly aligned before tightening.

Oil Pan

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.

2.0l H4 Turbo Engine

Torque specifications for 2.0L-H4-TURBO Engine

Cylinder Head

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 44 ft-lbs (60 N·m) 3. 90°
Important Notes
Follow the specified torque sequence in the service manual. Tighten in multiple steps.

Crankshaft Bearings

1

Crankshaft Bearing Cap Bolts

M10 x 1.25
Torque Specification
58 ft-lbs (79 N·m)
Important Notes
Ensure all bearing surfaces are clean and lubricated before installation.

Timing Cover

1

Timing Cover Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Tighten bolts in a crisscross pattern to ensure even pressure on the gasket.

Turbocharger

1

Turbocharger Mounting Bolts

M10 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the turbocharger is properly aligned before tightening.

Oil Pan

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.

2.5l H4 Engine

Torque specifications for 2.5L-H4 Engine

Cylinder Head

1

Cylinder Head Bolt

M12 x 1.5
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 44 ft-lbs (60 N·m) 3. 90°
Important Notes
Follow the specified torque sequence in the correct order.

Main Bearings

1

Main Bearing Cap Bolt

M10 x 1.25
Torque Specification
1. 18 ft-lbs (24 N·m) 2. 36 ft-lbs (49 N·m) 3. 45°
Important Notes
Follow the specified torque sequence in the correct order.

Connecting Rods

1

Connecting Rod Bolt

M8 x 1.0
Torque Specification
1. 14 ft-lbs (19 N·m) 2. 45°
Important Notes
Ensure threads are clean and lightly oiled before installation.

Camshaft Caps

1

Camshaft Cap Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Follow the specified torque sequence in the correct order.

Oil Pan

1

Oil Pan Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Torque sequence starts from the center and moves outward in a crisscross pattern.

2.5l H4 Turbo Engine

Torque specifications for 2.5L-H4-TURBO Engine

Cylinder Head

1

Cylinder Head Bolt

M12 x 1.5
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 44 ft-lbs (60 N·m) 3. 90°
Important Notes
Follow the specified torque sequence in the correct order.

Main Bearings

1

Main Bearing Cap Bolt

M10 x 1.25
Torque Specification
1. 18 ft-lbs (24 N·m) 2. 36 ft-lbs (49 N·m) 3. 45°
Important Notes
Follow the specified torque sequence in the correct order.

Connecting Rods

1

Connecting Rod Bolt

M8 x 1.0
Torque Specification
1. 14 ft-lbs (19 N·m) 2. 45°
Important Notes
Ensure threads are clean and lightly oiled before installation.

Camshaft Caps

1

Camshaft Cap Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Follow the specified torque sequence in the correct order.

Oil Pan

1

Oil Pan Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Torque sequence starts from the center and moves outward in a crisscross pattern.

Body

Torque specifications for Body

Suspension System

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
56.5 ft-lbs (76.5 N·m)
Important Notes
Estimated average torque value for strut/shock absorber mounting bolts.
2

Control Arm Bolts

M14 x 1.5
Torque Specification
56.5 ft-lbs (76.5 N·m)
Important Notes
Estimated average torque value for control arm bolts.
3

Ball Joint Nut

M16 x 1.5
Torque Specification
43.5 ft-lbs (59 N·m)
Important Notes
Estimated average torque value for ball joint nut.
4

Tie Rod End Nut

M12 x 1.25
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Estimated average torque value for tie rod end nut.
5

Sway Bar Link Nut

M14 x 1.5
Torque Specification
39 ft-lbs (52.5 N·m)
Important Notes
Estimated average torque value for sway bar link nut.

Steering System

1

Steering Gear/Rack Bolts

M16 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Estimated average torque value for steering gear/rack bolts.

Body Panel System

1

Body Mount Bolts

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average torque value for body mount bolts.
2

Fender Bolts

M10 x 1.25
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated average torque value for fender bolts.
3

Hood Hinge Bolts

M10 x 1.25
Torque Specification
17.5 ft-lbs (23.5 N·m)
Important Notes
Estimated average torque value for hood hinge bolts.
4

Trunk Lid Hinge Bolts

M10 x 1.25
Torque Specification
17.5 ft-lbs (23.5 N·m)
Important Notes
Estimated average torque value for trunk lid hinge bolts.
5

Door Hinge Bolts

M10 x 1.25
Torque Specification
17.5 ft-lbs (23.5 N·m)
Important Notes
Estimated average torque value for door hinge bolts.

Brakes

Torque specifications for Brakes

Brake Caliper Assembly

1

Brake Caliper Bolts

M12 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Torque value is an average of the specified range.
2

Brake Caliper Mounting Bracket Bolts

M12 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Torque value is an average of the specified range.

Brake Rotor/Disc Assembly

1

Brake Disc/Drum Retaining Bolts

M12 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Torque value is an average of the specified range.

Wheel Assembly

1

Wheel Lug Nuts

M14 x 1.5
Torque Specification
79 ft-lbs (107 N·m)
Important Notes
Torque value is an average of the specified range.

Brake Master Cylinder and Booster Assembly

1

Brake Master Cylinder Mounting Bolts

M10 x 1.5
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated torque value based on general industry standards.
2

Brake Booster Mounting Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated torque value based on general industry standards.

ABS Module Assembly

1

ABS Module Mounting Bolts

M8 x 1.25
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated torque value based on general industry standards.

Brake Line Fittings

1

Brake Line Fittings

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

Drivetrain

Torque specifications for Drivetrain

Flywheel Clutch

1

Flywheel Bolts

M10 x 1.25
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Ensure even torque application in a cross pattern.
2

Clutch Pressure Plate Bolts

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Estimated value based on similar components.

Transmission

1

Transmission Mounting Bolts

M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure proper alignment before torquing.
2

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Over-torquing can damage the pan or gasket.
3

Transmission Drain Plug

M12 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the plug is properly seated before torquing.

Drive Axles

1

Drive Axle Bolts

M12 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure proper alignment of the axle.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
145 ft-lbs (196 N·m)
Important Notes
Use a torque wrench for accurate torque application.

Driveshaft

1

Driveshaft Bolts

M10 x 1.25
Torque Specification
46 ft-lbs (62 N·m)
Important Notes
Ensure the driveshaft is properly aligned before torquing.

Differential

1

Rear Differential Mounting Bolts

M12 x 1.75
Torque Specification
57 ft-lbs (77 N·m)
Important Notes
Estimated value based on similar components.
2

Differential Drain Plug

M14 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure the plug is properly seated before torquing.

Transfer Case

1

Transfer Case Drain Plug

M14 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure the plug is properly seated before torquing.

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Ensure proper grounding and electrical connection. Avoid over-tightening to prevent damage.

Starting Charging System

1

Battery Terminal Nuts

M6 x 1.0
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Ensures a secure electrical connection without damaging the battery terminals.
2

Starter Motor Mounting Bolts

M10 x 1.25
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Ensures proper alignment and electrical grounding for the starter motor.
3

Alternator Mounting Bolts

M10 x 1.25
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Ensures proper alignment and belt tension for the alternator.

Electrical System

1

Ground Strap Bolts

M6 x 1.0
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Estimated value. Ensures a solid grounding connection without damaging the components.
2

ECU Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (10.5 N·m)
Important Notes
Estimated value. Ensures secure mounting and grounding for the Engine Control Unit (ECU).
3

Sensor Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (10.5 N·m)
Important Notes
Estimated value. Ensures secure mounting of sensors for accurate operation.

Emissions Sensors

Torque specifications for Emissions_sensors

Egr System

1

EGR Valve Mounting Bolts

M8 x 1.25
Torque Specification
13 ft-lbs (17.6 N·m)
Important Notes
Estimated value based on typical M8 bolts in emissions systems.

Exhaust Manifold System

1

Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
25.5 ft-lbs (34.6 N·m)
Important Notes
Estimated value based on typical M10 bolts in exhaust systems.
2

Oxygen Sensor (O2 Sensor) Mounting Bolts

M10 x 1.5
Torque Specification
25.5 ft-lbs (34.6 N·m)
Important Notes
Estimated value based on typical exhaust sensor mounting bolts.

Catalytic Converter System

1

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
25.5 ft-lbs (34.6 N·m)
Important Notes
Estimated value based on typical M10 bolts in exhaust systems.

Intake System

1

Throttle Body Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (10.8 N·m)
Important Notes
Estimated value based on typical M6 bolts in intake systems.
2

Intake Manifold Bolts

M8 x 1.25
Torque Specification
16.5 ft-lbs (22.4 N·m)
Important Notes
Estimated value based on typical M8 bolts in intake systems.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Torque values are the midpoint of the provided range. Ensure bolts are tightened in a crisscross pattern.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
20.5 ft-lbs (27.5 N·m)
Important Notes
Torque values are the midpoint of the provided range. Use a crisscross pattern for tightening.

Exhaust Pipes

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Torque values are the midpoint of the provided range.
2

Catalytic Converter to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Torque values are the midpoint of the provided range.
3

Exhaust Downpipe to Turbocharger Bolts

M8 x 1.25
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Estimated value based on similar exhaust connections. Ensure a leak-free seal.

Muffler

1

Muffler to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Torque values are the midpoint of the provided range.

Oxygen Sensor

1

Oxygen Sensor (O2 Sensor)

M12 x 1.5
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Estimated value based on similar sensors. Ensure proper sealing to prevent exhaust leaks.

Exhaust Hangers

1

Exhaust Hanger Bolts

M6 x 1.0
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Estimated value based on similar chassis-mounted components.

Heat Shields

1

Exhaust Heat Shield Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (13.5 N·m)
Important Notes
Estimated value based on similar small fasteners.

Fuel

Torque specifications for Fuel

Fuel Delivery System

1

Fuel Rail Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Secures the fuel rail to the intake manifold. Estimated bolt size based on typical applications.
2

Fuel Injector Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Secures the fuel injectors to the intake manifold and fuel rail. Estimated bolt size based on typical applications.
3

Fuel Injector Rail Bolts

M8 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Secures the fuel injector rail assembly to the engine. Estimated bolt size based on torque range.

Fuel Storage System

1

Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Secures the fuel pump to the fuel tank assembly. Estimated bolt size based on torque range.
2

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Secures the fuel tank straps to the chassis. Estimated bolt size based on torque range.
3

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Secures the fuel filler neck to the fuel tank or body. Estimated bolt size based on typical applications.

Fuel Filtration System

1

Fuel Filter Bolt/Nut

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Secures the fuel filter housing or assembly. Estimated bolt size based on torque range.

High Pressure Fuel System

1

High-Pressure Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Secures the high-pressure fuel pump to the engine. Estimated bolt size based on torque range.
2

Fuel Pressure Regulator Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Secures the fuel pressure regulator to the fuel rail. Estimated bolt size based on typical applications.

Fuel Line Connections

1

Fuel Line Flange Bolts

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Secures fuel line flanges or connections. Estimated bolt size based on torque range.

Hvac

Torque specifications for Hvac

Ac System

1

A/C Compressor Mounting Bolts

M10 x 1.25
Torque Specification
23.5 ft-lbs (32 N·m)
Important Notes
Estimated value based on similar components. Ensure bolts are tightened evenly to avoid compressor misalignment.
2

A/C Line Fittings

M12 x 1.25
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Estimated value based on similar components. Ensure fittings are clean and free of debris before tightening.

Evaporator Core

1

Evaporator Core Housing Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (10.5 N·m)
Important Notes
Estimated value based on similar components. Tighten bolts in a sequence to ensure even pressure on the housing.

Blower Motor

1

Blower Motor Mounting Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value based on similar components. Avoid over-tightening to prevent damage to the motor or housing.

Heater Core

1

Heater Core Inlet/Outlet Fittings

M8 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Estimated value based on similar components. Ensure fittings are clean and free of debris before tightening.

Suspension

Torque specifications for Suspension

Front Suspension

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
54 ft-lbs (73 N·m)
Important Notes
Secure the strut or shock absorber to the vehicle's frame or suspension components.
2

Control Arm Bolts

M12 x 1.25
Torque Specification
54 ft-lbs (73 N·m)
Important Notes
Attach the control arms to the frame or suspension components, maintaining the vehicle's ride height and stability.
3

Upper Control Arm Bushing Bolts

M10 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Secure the upper control arm bushings to the frame or suspension components, maintaining proper suspension geometry and preventing bushing damage. (Estimated value)
4

Lower Control Arm Bolts

M14 x 1.5
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Attach the lower control arm to the frame or suspension components, ensuring proper ride height and stability. (Estimated value)

Steering System

1

Steering Knuckle Bolts

M16 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Secure the steering knuckle to the frame or suspension components, maintaining proper steering alignment and stability. (Estimated value)
2

Ball Joint Nut

M12 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Secure the ball joint to the control arm or steering knuckle, allowing for smooth movement and maintaining proper suspension geometry.
3

Tie Rod End Nut

M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Secure the tie rod end to the steering knuckle or control arm, ensuring proper steering alignment and stability.

Sway Bar System

1

Sway Bar Link Nut

M12 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Secure the sway bar link to the sway bar or control arm, maintaining the vehicle's roll resistance and stability.
2

Coil Spring Mounting Bolts

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Secure the coil spring to the strut or shock absorber, ensuring proper ride height and stability. (Estimated value)

Tr580 Transmission

Torque specifications for Tr580 Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on general industry standards.
2

Transmission Mounting Bracket Bolts

M10 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Estimated value based on general industry standards.

Transmission Case

1

TR580 Transmission Case Bolts

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value based on general industry standards.
2

TR580 Transmission Bellhousing Bolts

M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value based on general industry standards.

Transmission Fluid System

1

Transmission Oil Pan Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value based on general industry standards.
2

Transmission Fluid Drain and Fill Plugs

M12 x 1.5
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Estimated value based on general industry standards.

Transmission Shift Linkage

1

TR580 Transmission Shift Linkage Bolts

M8 x 1.25
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards.

Tr690 Transmission

Torque specifications for Tr690 Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Torque value range: 36-43 ft-lbs (49-58 N·m)

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M8 x 1.25
Torque Specification
78 in-lbs (8.8 N·m)
Important Notes
Torque value range: 78-87 in-lbs (8.8-9.8 N·m)

Transmission Fluid System

1

Transmission Drain and Fill Plugs

M14 x 1.5
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Torque value range: 29-36 ft-lbs (39-49 N·m)

TR690 Transmission Case

1

TR690 Transmission Case Bolts

M14 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated torque value range: 40-50 ft-lbs (54-68 N·m)

TR690 Transmission Bellhousing

1

TR690 Transmission Bellhousing Bolts

M12 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Estimated torque value range: 30-40 ft-lbs (41-54 N·m)

TR690 Transmission Crossmember

1

TR690 Transmission Crossmember Bolts

M16 x 1.5
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Estimated torque value range: 50-60 ft-lbs (68-81 N·m)

TR690 Transmission Cooler Line Fittings

1

TR690 Transmission Cooler Line Fittings

M10 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated torque value range: 20-30 ft-lbs (27-41 N·m)

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 a 2014-2021 Subaru WRX?

The lug nuts on a 2014-2021 Subaru WRX should be tightened to 89 ft-lbs (120 Nm) using a torque wrench.

Q2

What IS the proper torque for the oil drain plug on a 2014-2021 Subaru WRX?

The oil drain plug on a 2014-2021 Subaru WRX should be tightened to 29 ft-lbs (40 Nm) using a torque wrench.

Q3

Can I use a regular wrench to tighten bolts on my 2014-2021 Subaru WRX?

No, it IS not recommended to use a regular wrench to tighten bolts on a 2014-2021 Subaru WRX. A torque wrench should be used to ensure proper torque IS applied to each bolt.

Q4

What are the consequences of overtightening or undertightening bolts on my 2014-2021 Subaru WRX?

Overtightening or undertightening bolts on a 2014-2021 Subaru WRX can lead to a variety of issues, including damage to the bolt, the component it IS attached to, or even the vehicle itself. It IS important to follow the manufacturer's recommended torque specifications when tightening bolts.

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 Components Tightening Torque Specifications

Technical procedure overview for tightening torque specifications on engine components of the Subaru WRX

  • Cylinder head bolts: 76-87 Nm (56-64 ft-lb)
  • Intake manifold bolts: 22-29 Nm (16-21 ft-lb)
  • Exhaust manifold bolts: 49-68 Nm (36-50 ft-lb)
  • Spark plug hole plug: 20-30 Nm (15-22 ft-lb)
  • Oil pan bolts: 11-15 Nm (8-11 ft-lb)
  • Oil filter: 30-34 Nm (22-25 ft-lb)
View full procedure

Driveline Components Tightening Torque Specifications

Technical procedure overview for tightening torque specifications on driveline components of the Subaru WRX

  • Front axle hub nut: 175-203 Nm (129-150 ft-lb)
  • Rear axle hub nut: 118-147 Nm (87-108 ft-lb)
  • Transmission mount bolts: 54-75 Nm (40-55 ft-lb)
  • Driveshaft bolts: 69-95 Nm (51-70 ft-lb)
  • Rear differential drain plug: 25-33 Nm (18-24 ft-lb)
View full procedure

Suspension Components Tightening Torque Specifications

Technical procedure overview for tightening torque specifications on suspension components of the Subaru WRX

  • Front strut upper mount bolts: 54-75 Nm (40-55 ft-lb)
  • Front strut lower mount bolts: 108-142 Nm (80-105 ft-lb)
  • Front lower control arm bolts: 122-156 Nm (90-115 ft-lb)
  • Rear upper control arm bolts: 108-142 Nm (80-105 ft-lb)
  • Rear lower control arm bolts: 122-156 Nm (90-115 ft-lb)
  • Rear trailing arm bolts: 91-118 Nm (67-87 ft-lb)
View full procedure

Brake Components Tightening Torque Specifications

Technical procedure overview for tightening torque specifications on brake components of the Subaru WRX

  • Front brake caliper mounting bolts: 129-169 Nm (95-124 ft-lb)
  • Rear brake caliper mounting bolts: 81-108 Nm (60-80 ft-lb)
  • Brake rotor mounting bolts: 27-33 Nm (20-24 ft-lb)
  • Brake line banjo bolts: 29-44 Nm (21-32 ft-lb)
View full procedure
Technical Service Bulletins

TSB 16-143-15R: Revised Engine Cylinder Head Bolt Tightening Procedure

2015-09-01

This technical service bulletin updates the tightening procedure for engine cylinder head bolts on certain 2015-2017 Subaru WRX models. The revised procedure involves torquing the bolts in two stages, with a final torque of 76-87 Nm (56-64 ft-lb).

2015-2017 WRX

Resolution: Dealers are instructed to follow the updated tightening procedure when performing any repairs or maintenance that requires removing or replacing the cylinder head.

TSB 18-120-19R: Revised Front Brake Rotor Mounting Bolt Tightening Torque

2018-12-01

This technical service bulletin revises the tightening torque for the front brake rotor mounting bolts on certain 2018-2021 Subaru WRX models. The revised torque IS 27-33 Nm (20-24 ft-lb).

2018-2021 WRX

Resolution: Dealers are instructed to use the revised tightening torque when performing any repairs or maintenance that requires removing or replacing the front brake rotors.

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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.
  • Vehicle specifications and procedures may vary by model year, trim level, and region.
  • Always follow the manufacturer's recommended procedures and safety precautions.
  • Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
  • If you're unsure about any procedure, consult a qualified professional mechanic.
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About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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