Subaru Vehicle Models Subaru WRX 1992-2001
Subaru Vehicle Models Subaru WRX 1992-2001 Torque Specifications
Complete Subaru Vehicle Models Subaru WRX 1992-2001 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
Safety First
- Always verify torque specifications with your vehicle's factory service manual
- Use properly calibrated torque wrenches
- Replace all torque-to-yield (TTY) bolts - they are single-use only
- When in doubt, consult a professional mechanic
Quick Reference Guide
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
Cross Pattern
Used for gaskets and cover plates
Sequential Pattern
Used for head bolts and other critical components
Common Mistakes to Avoid
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
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
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Torque Calculator
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2.0l H4 Engine
Torque specifications for 2.0L-H4 Engine
2.0l H4 Engine
Torque specifications for 2.0L-H4 Engine
Cylinder Head and Valvetrain
1 Cylinder Head Bolts
M12 x 1.5
1
Cylinder Head Bolts
M12 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Estimated average value from 29-36 ft-lbs range.
2 Valve Cover Bolts
M8 x 1.25
2
Valve Cover Bolts
M8 x 1.25
Torque Specification
5 ft-lbs (7 N·m)
3 Rocker Arms/Shafts Bolts
M10 x 1.5
3
Rocker Arms/Shafts Bolts
M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Estimated average value from 14-18 ft-lbs range.
Engine Block and Bearings
1 Main Bearing Bolts
M14 x 2.0
1
Main Bearing Bolts
M14 x 2.0
Torque Specification
48 ft-lbs (65 N·m)
Important Notes
Estimated average value from 45-51 ft-lbs range.
2 Connecting Rod Nuts
M12 x 1.5
2
Connecting Rod Nuts
M12 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Estimated average value from 29-36 ft-lbs range.
Timing and Accessory Components
1 Timing Belt/Chain Tensioner Bolt
M10 x 1.5
1
Timing Belt/Chain Tensioner Bolt
M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Estimated average value from 14-18 ft-lbs range.
2 Camshaft Sprocket Bolt
M14 x 2.0
2
Camshaft Sprocket Bolt
M14 x 2.0
Torque Specification
54 ft-lbs (73 N·m)
Important Notes
Estimated average value from 50-58 ft-lbs range.
Turbocharger and Intercooler Components
1 Turbocharger Mounting Bolts
M12 x 1.5
1
Turbocharger Mounting Bolts
M12 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average value from 40-50 ft-lbs range.
2 Intercooler Mounting Bolts
M10 x 1.5
2
Intercooler Mounting Bolts
M10 x 1.5
Torque Specification
22.5 ft-lbs (31 N·m)
Important Notes
Estimated average value from 20-25 ft-lbs range.
Fuel and Ignition Components
1 Fuel Rail Bolts
M10 x 1.5
1
Fuel Rail Bolts
M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Estimated average value from 14-18 ft-lbs range.
2 Fuel Injector Bolts
M8 x 1.25
2
Fuel Injector Bolts
M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Estimated average value from 14-18 ft-lbs range.
Cooling and Exhaust Components
1 Water Pump Bolts
M10 x 1.5
1
Water Pump Bolts
M10 x 1.5
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated average value from 7-9 ft-lbs range.
2 Thermostat Housing Bolts
M8 x 1.25
2
Thermostat Housing Bolts
M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated average value from 7-9 ft-lbs range.
2.0l H4 Turbo Engine
Torque specifications for 2.0L-H4-TURBO Engine
2.0l H4 Turbo Engine
Torque specifications for 2.0L-H4-TURBO Engine
Cylinder Head and Valvetrain
1 Cylinder Head Bolts
M12 x 1.5
1
Cylinder Head Bolts
M12 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Estimated average value from 29-36 ft-lbs range.
2 Valve Cover Bolts
M8 x 1.25
2
Valve Cover Bolts
M8 x 1.25
Torque Specification
5 ft-lbs (7 N·m)
3 Rocker Arms/Shafts Bolts
M10 x 1.5
3
Rocker Arms/Shafts Bolts
M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Estimated average value from 14-18 ft-lbs range.
Engine Block and Bearings
1 Main Bearing Bolts
M14 x 2.0
1
Main Bearing Bolts
M14 x 2.0
Torque Specification
48 ft-lbs (65 N·m)
Important Notes
Estimated average value from 45-51 ft-lbs range.
2 Connecting Rod Nuts
M12 x 1.5
2
Connecting Rod Nuts
M12 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Estimated average value from 29-36 ft-lbs range.
Timing and Accessory Components
1 Timing Belt/Chain Tensioner Bolt
M10 x 1.5
1
Timing Belt/Chain Tensioner Bolt
M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Estimated average value from 14-18 ft-lbs range.
2 Camshaft Sprocket Bolt
M14 x 2.0
2
Camshaft Sprocket Bolt
M14 x 2.0
Torque Specification
54 ft-lbs (73 N·m)
Important Notes
Estimated average value from 50-58 ft-lbs range.
Turbocharger and Intercooler Components
1 Turbocharger Mounting Bolts
M12 x 1.5
1
Turbocharger Mounting Bolts
M12 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average value from 40-50 ft-lbs range.
2 Intercooler Mounting Bolts
M10 x 1.5
2
Intercooler Mounting Bolts
M10 x 1.5
Torque Specification
22.5 ft-lbs (31 N·m)
Important Notes
Estimated average value from 20-25 ft-lbs range.
Fuel and Ignition Components
1 Fuel Rail Bolts
M10 x 1.5
1
Fuel Rail Bolts
M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Estimated average value from 14-18 ft-lbs range.
2 Fuel Injector Bolts
M8 x 1.25
2
Fuel Injector Bolts
M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Estimated average value from 14-18 ft-lbs range.
Cooling and Exhaust Components
1 Water Pump Bolts
M10 x 1.5
1
Water Pump Bolts
M10 x 1.5
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated average value from 7-9 ft-lbs range.
2 Thermostat Housing Bolts
M8 x 1.25
2
Thermostat Housing Bolts
M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated average value from 7-9 ft-lbs range.
4eat Transmission
Torque specifications for 4eat Transmission
4eat Transmission
Torque specifications for 4eat Transmission
Transmission Mounting
1 Transmission Mounting Bolts
M12 x 1.25
1
Transmission Mounting Bolts
M12 x 1.25
Torque Specification
53 ft-lbs (72 N·m)
Transmission Oil Pan
1 Transmission Oil Pan Bolts
M8 x 1.25
1
Transmission Oil Pan Bolts
M8 x 1.25
Torque Specification
3 ft-lbs (4.8 N·m)
Important Notes
Estimated torque value, may vary depending on specific application.
Transmission Fluid System
1 Transmission Drain and Fill Plugs
M16 x 1.5
1
Transmission Drain and Fill Plugs
M16 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Transmission Case and Valve Body
1 4EAT Transmission Case Bolts
M14 x 1.5
1
4EAT Transmission Case Bolts
M14 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated torque value, may vary depending on specific application.
2 4EAT Valve Body Bolts
M10 x 1.25
2
4EAT Valve Body Bolts
M10 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated torque value, may vary depending on specific application.
Solenoid Pack and Torque Converter
1 4EAT Solenoid Pack Bolts
M8 x 1.25
1
4EAT Solenoid Pack Bolts
M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated torque value, may vary depending on specific application.
2 4EAT Torque Converter Bolts
M14 x 1.5
2
4EAT Torque Converter Bolts
M14 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Estimated torque value, may vary depending on specific application.
Body
Torque specifications for Body
Body
Torque specifications for Body
Wheels And Hubs
1 Wheel Lug Nuts
M12 x 1.5
1
Wheel Lug Nuts
M12 x 1.5
Torque Specification
72 ft-lbs (98 N·m)
Important Notes
Torque in a star pattern to ensure even clamping force.
2 Brake Caliper Bolts
M10 x 1.25
2
Brake Caliper Bolts
M10 x 1.25
Torque Specification
62 ft-lbs (84 N·m)
Important Notes
Ensure caliper is properly aligned before tightening.
3 Brake Caliper Mounting Bracket Bolts
M12 x 1.5
3
Brake Caliper Mounting Bracket Bolts
M12 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Ensure bracket is seated properly before tightening.
4 Brake Disc/Drum Retaining Bolts
M8 x 1.25
4
Brake Disc/Drum Retaining Bolts
M8 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
These bolts are for retaining the disc/drum during assembly and are not load-bearing.
Suspension
1 Strut/Shock Absorber Mounting Bolts
M12 x 1.5
1
Strut/Shock Absorber Mounting Bolts
M12 x 1.5
Torque Specification
62 ft-lbs (84 N·m)
Important Notes
Ensure strut is properly aligned before tightening.
2 Control Arm Bolts
M14 x 1.5
2
Control Arm Bolts
M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Ensure control arm is properly seated before tightening.
3 Ball Joint Nut
M12 x 1.5
3
Ball Joint Nut
M12 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Ensure ball joint is properly seated in the steering knuckle.
4 Sway Bar Link Nut
M10 x 1.25
4
Sway Bar Link Nut
M10 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure sway bar link is properly aligned before tightening.
Steering
1 Tie Rod End Nut
M12 x 1.5
1
Tie Rod End Nut
M12 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure tie rod end is properly seated in the steering knuckle.
2 Steering Gear/Rack Bolts
M12 x 1.5
2
Steering Gear/Rack Bolts
M12 x 1.5
Torque Specification
62 ft-lbs (84 N·m)
Important Notes
Ensure steering gear/rack is properly aligned before tightening.
Fuel System
1 Fuel Tank Strap Bolts
M8 x 1.25
1
Fuel Tank Strap Bolts
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure fuel tank is properly seated before tightening.
2 Fuel Filler Neck Bolts
M8 x 1.25
2
Fuel Filler Neck Bolts
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure filler neck is properly aligned before tightening.
Body Panels
1 Body Panel Bolts
M6 x 1.0
1
Body Panel Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure panels are properly aligned before tightening.
2 Hood Hinge Bolts
M8 x 1.25
2
Hood Hinge Bolts
M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure hood is properly aligned before tightening.
Safety System
1 Seat Belt Anchor Bolts
M10 x 1.25
1
Seat Belt Anchor Bolts
M10 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Critical for passenger safety. Ensure proper alignment before tightening.
Chassis
1 Subframe Mounting Bolts
M14 x 1.5
1
Subframe Mounting Bolts
M14 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Torque in a crisscross pattern to ensure even clamping force.
2 Radiator Support Bolts
M8 x 1.25
2
Radiator Support Bolts
M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure radiator is properly aligned before tightening.
Brakes
Torque specifications for Brakes
Brakes
Torque specifications for Brakes
Brake Caliper
1 Brake Caliper Bolts
M10 x 1.25
1
Brake Caliper Bolts
M10 x 1.25
Torque Specification
62.5 ft-lbs (85 N·m)
Important Notes
Torque value is an average of the specified range (53-72 ft-lbs / 72-98 Nm).
2 Brake Caliper Mounting Bracket Bolts
M12 x 1.25
2
Brake Caliper Mounting Bracket Bolts
M12 x 1.25
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Torque value is an average of the specified range (61-79 ft-lbs / 83-107 Nm).
Brake Rotor Drum
1 Brake Disc/Drum Retaining Bolts
M8 x 1.25
1
Brake Disc/Drum Retaining Bolts
M8 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Torque value is an average of the specified range (8-14 ft-lbs / 11-19 Nm).
Brake Hydraulics
1 Brake Hose Banjo Bolt
M10 x 1.0
1
Brake Hose Banjo Bolt
M10 x 1.0
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Torque value is an average of the specified range (22-29 ft-lbs / 30-39 Nm).
2 Brake Master Cylinder Mounting Bolts
M8 x 1.25
2
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 specified range (14-18 ft-lbs / 19-24 Nm).
Brake Booster Pedal
1 Brake Booster Mounting Bolts
M8 x 1.25
1
Brake Booster Mounting Bolts
M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Torque value is an average of the specified range (14-18 ft-lbs / 19-24 Nm).
2 Brake Pedal Assembly Bolts
M8 x 1.25
2
Brake Pedal Assembly Bolts
M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Torque value is an average of the specified range (14-18 ft-lbs / 19-24 Nm).
Wheel Assembly
1 Wheel Lug Nuts
M12 x 1.25
1
Wheel Lug Nuts
M12 x 1.25
Torque Specification
72 ft-lbs (98 N·m)
Important Notes
Torque value is an average of the specified range (65-79 ft-lbs / 88-107 Nm).
Drivetrain
Torque specifications for Drivetrain
Drivetrain
Torque specifications for Drivetrain
Flywheel
1 Flywheel Bolts
M10 x 1.25
1
Flywheel Bolts
M10 x 1.25
Torque Specification
58 ft-lbs (79 N·m)
Important Notes
Torque values are based on typical M10 x 1.25 bolts. Ensure bolts are tightened in a star pattern.
2 Clutch Pressure Plate Bolts
M8 x 1.25
2
Clutch Pressure Plate Bolts
M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Torque values are estimated based on typical M8 x 1.25 bolts. Tighten in a star pattern.
Transmission
1 Transmission Mounting Bolts
M12 x 1.75
1
Transmission Mounting Bolts
M12 x 1.75
Torque Specification
63 ft-lbs (85 N·m)
Important Notes
Torque values are based on typical M12 x 1.75 bolts. Ensure proper alignment before tightening.
2 Transmission Oil Pan Bolts
M6 x 1.0
2
Transmission Oil Pan Bolts
M6 x 1.0
Torque Specification
5 ft-lbs (6.8 N·m)
Important Notes
Torque values are estimated based on typical M6 x 1.0 bolts. Tighten in a crisscross pattern.
3 Transmission Bellhousing Bolts
M10 x 1.5
3
Transmission Bellhousing Bolts
M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Torque values are estimated based on typical M10 x 1.5 bolts. Tighten in a star pattern.
Driveshaft
1 Propeller/Drive Shaft Bolts
M8 x 1.25
1
Propeller/Drive Shaft Bolts
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Torque values are based on typical M8 x 1.25 bolts. Ensure proper alignment before tightening.
Differential
1 Differential Mounting Bolts
M12 x 1.75
1
Differential Mounting Bolts
M12 x 1.75
Torque Specification
63 ft-lbs (85 N·m)
Important Notes
Torque values are based on typical M12 x 1.75 bolts. Ensure proper alignment before tightening.
2 Rear Differential Pinion Flange Nut
M24 x 1.5
2
Rear Differential Pinion Flange Nut
M24 x 1.5
Torque Specification
174 ft-lbs (236 N·m)
Important Notes
Torque values are based on typical M24 x 1.5 nuts. Use a torque wrench with a high capacity.
Transfer Case
1 Transfer Case Mounting Bolts
M12 x 1.75
1
Transfer Case Mounting Bolts
M12 x 1.75
Torque Specification
63 ft-lbs (85 N·m)
Important Notes
Torque values are based on typical M12 x 1.75 bolts. Ensure proper alignment before tightening.
Electrical
Torque specifications for Electrical
Electrical
Torque specifications for Electrical
Ignition System
1 Ignition Coil Bolt
M6 x 1.0
1
Ignition Coil Bolt
M6 x 1.0
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Critical for preventing electrical arcing or damage to the coil.
Starter System
1 Starter Motor Mounting Bolts
M10 x 1.25
1
Starter Motor Mounting Bolts
M10 x 1.25
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Ensures the starter motor remains firmly attached to the engine block.
Charging System
1 Alternator Mounting Bolts
M8 x 1.25
1
Alternator Mounting Bolts
M8 x 1.25
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Ensures the alternator is securely mounted and properly aligned with the drive belt.
Battery System
1 Battery Terminal Nuts
M6 x 1.0
1
Battery Terminal Nuts
M6 x 1.0
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Ensures a secure connection, preventing voltage drop, corrosion, or electrical arcing.
Grounding System
1 Ground Strap Bolts
M6 x 1.0
1
Ground Strap Bolts
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value. Ensures a reliable electrical connection, preventing electrical noise or poor performance.
Fuse And Relay System
1 Fuse Box Mounting Bolts
M6 x 1.0
1
Fuse Box Mounting Bolts
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value. Ensures the fuse box is securely mounted, preventing vibration damage or loose connections.
Engine Control System
1 ECU Mounting Bolts
M6 x 1.0
1
ECU Mounting Bolts
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value. Ensures the ECU is securely mounted, preventing damage from vibration or improper grounding.
Sensor System
1 Crankshaft Position Sensor Mounting Bolt
M6 x 1.0
1
Crankshaft Position Sensor Mounting Bolt
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value. Ensures accurate sensor positioning and prevents damage to the sensor or its wiring.
2 Camshaft Position Sensor Mounting Bolt
M6 x 1.0
2
Camshaft Position Sensor Mounting Bolt
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value. Ensures accurate sensor positioning and prevents damage to the sensor or its wiring.
Emissions Sensors
Torque specifications for Emissions_sensors
Emissions Sensors
Torque specifications for Emissions_sensors
Egr System
1 EGR Valve Bolts
M8 x 1.25
1
EGR Valve Bolts
M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensures a secure seal to prevent exhaust leaks.
2 EGR Pipe Bolts
M8 x 1.25
2
EGR Pipe Bolts
M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Estimated value based on similar EGR system components. Ensures a secure connection to prevent exhaust leaks.
Exhaust Manifold
1 Exhaust Manifold/Headers Bolts
M10 x 1.25
1
Exhaust Manifold/Headers Bolts
M10 x 1.25
Torque Specification
1. 22 ft-lbs (30 N·m)
2. 28 ft-lbs (38 N·m)
Important Notes
Use a crisscross pattern to ensure even clamping force.
2 Exhaust Manifold/Headers to Cylinder Head Bolts
M10 x 1.25
2
Exhaust Manifold/Headers to Cylinder Head Bolts
M10 x 1.25
Torque Specification
1. 29 ft-lbs (39 N·m)
2. 36 ft-lbs (49 N·m)
Important Notes
Use a crisscross pattern to ensure even clamping force.
Exhaust Pipe
1 Exhaust Pipe to Exhaust Manifold/Headers Bolts
M10 x 1.25
1
Exhaust Pipe to Exhaust Manifold/Headers Bolts
M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensures a tight seal to prevent exhaust leaks.
2 Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.25
2
Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensures a secure connection to prevent exhaust leaks.
3 Catalytic Converter Heat Shield Bolts
M6 x 1.0
3
Catalytic Converter Heat Shield Bolts
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on similar heat shield bolts. Ensures the heat shield remains securely in place.
Oxygen Sensors
1 Oxygen Sensor (O2 Sensor)
M18 x 1.5
1
Oxygen Sensor (O2 Sensor)
M18 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value based on typical oxygen sensor torque specifications. Ensures a secure fit and prevents exhaust leaks.
Exhaust
Torque specifications for Exhaust
Exhaust
Torque specifications for Exhaust
Exhaust Manifold
1 Exhaust Manifold/Headers Bolts
M8 x 1.25
1
Exhaust Manifold/Headers Bolts
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Torque values are estimated based on typical M8 bolt specifications.
2 Exhaust Manifold/Headers to Cylinder Head Bolts
M10 x 1.5
2
Exhaust Manifold/Headers to Cylinder Head Bolts
M10 x 1.5
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Torque values are estimated based on typical M10 bolt specifications.
Exhaust Pipe
1 Exhaust Pipe to Exhaust Manifold/Headers Bolts
M8 x 1.25
1
Exhaust Pipe to Exhaust Manifold/Headers Bolts
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Torque values are estimated based on typical M8 bolt specifications.
2 Catalytic Converter to Exhaust Pipe Bolts
M8 x 1.25
2
Catalytic Converter to Exhaust Pipe Bolts
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Torque values are estimated based on typical M8 bolt specifications.
3 Muffler to Exhaust Pipe Bolts
M8 x 1.25
3
Muffler to Exhaust Pipe Bolts
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Torque values are estimated based on typical M8 bolt specifications.
Heat Shield
1 Exhaust Heat Shield Bolts
M6 x 1.0
1
Exhaust Heat Shield Bolts
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Torque values are estimated based on typical M6 bolt specifications.
Oxygen Sensor
1 Oxygen Sensor (O2 Sensor)
M18 x 1.5
1
Oxygen Sensor (O2 Sensor)
M18 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Torque values are estimated based on typical M18 bolt specifications.
Exhaust Hanger
1 Exhaust Hanger Bolts/Nuts
M8 x 1.25
1
Exhaust Hanger Bolts/Nuts
M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Torque values are estimated based on typical M8 bolt specifications.
Turbocharger
1 Turbocharger-to-Exhaust Manifold Bolts
M10 x 1.5
1
Turbocharger-to-Exhaust Manifold Bolts
M10 x 1.5
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Torque values are estimated based on typical M10 bolt specifications.
Fuel
Torque specifications for Fuel
Fuel
Torque specifications for Fuel
Fuel Rail System
1 Fuel Rail Bolts
M8 x 1.25
1
Fuel Rail Bolts
M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Torque in a crisscross pattern to ensure even pressure distribution.
2 Fuel Injector Bolts
M6 x 1.0
2
Fuel Injector Bolts
M6 x 1.0
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Ensure injectors are properly seated before tightening.
Fuel Pump And Tank System
1 Fuel Pump Mounting Bolts
M8 x 1.25
1
Fuel Pump Mounting Bolts
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure the fuel pump gasket is properly seated before tightening.
2 Fuel Tank Strap Bolts
M10 x 1.5
2
Fuel Tank Strap Bolts
M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure the fuel tank is properly aligned before tightening.
3 Fuel Tank Sender Unit Bolts
M6 x 1.0
3
Fuel Tank Sender Unit Bolts
M6 x 1.0
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure the sender unit gasket is properly seated before tightening.
Fuel Delivery System
1 Fuel Filler Neck Bolts
M8 x 1.25
1
Fuel Filler Neck Bolts
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure the filler neck gasket is properly seated before tightening.
2 Fuel Filter Bolt/Nut
M8 x 1.25
2
Fuel Filter Bolt/Nut
M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure the filter housing is properly aligned before tightening.
3 Fuel Line Fittings
M8 x 1.25
3
Fuel Line Fittings
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure fittings are properly aligned and seated before tightening.
4 Fuel Return Line Bolts
M6 x 1.0
4
Fuel Return Line Bolts
M6 x 1.0
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure the return line is properly aligned before tightening.
Fuel Pressure Regulation System
1 Fuel Pressure Regulator Bolts
M6 x 1.0
1
Fuel Pressure Regulator Bolts
M6 x 1.0
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure the regulator is properly seated before tightening.
Hvac
Torque specifications for Hvac
Hvac
Torque specifications for Hvac
Ac Compressor
1 A/C Compressor Mounting Bolts
M10 x 1.5
1
A/C Compressor Mounting Bolts
M10 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Torque value is the midpoint of the provided range (29-36 ft-lbs).
Ac Lines
1 A/C Line Fittings
M8 x 1.25
1
A/C Line Fittings
M8 x 1.25
Torque Specification
18 ft-lbs (24.5 N·m)
Important Notes
Torque value is the midpoint of the provided range (16-20 ft-lbs).
Evaporator
1 Evaporator Housing Bolts
M6 x 1.0
1
Evaporator Housing Bolts
M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Torque value is the midpoint of the provided range (7-9 ft-lbs).
Heater Core
1 Heater Core Inlet/Outlet Fittings
M8 x 1.25
1
Heater Core Inlet/Outlet Fittings
M8 x 1.25
Torque Specification
16 ft-lbs (21.5 N·m)
Important Notes
Torque value is the midpoint of the provided range (14-18 ft-lbs).
Blower Motor
1 Blower Motor Mounting Bolts
M6 x 1.0
1
Blower Motor Mounting Bolts
M6 x 1.0
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Torque value is the midpoint of the provided range (4-6 ft-lbs).
Condenser
1 Condenser Mounting Bolts
M8 x 1.25
1
Condenser Mounting Bolts
M8 x 1.25
Torque Specification
16 ft-lbs (21.5 N·m)
Important Notes
Torque value is the midpoint of the provided range (14-18 ft-lbs).
Suspension
Torque specifications for Suspension
Suspension
Torque specifications for Suspension
Strut Shock Absorber
1 Strut/Shock Absorber Mounting Bolts
M12 x 1.5
1
Strut/Shock Absorber Mounting Bolts
M12 x 1.5
Torque Specification
63 ft-lbs (85 N·m)
Important Notes
Torque value is the midpoint of the provided range (53-72 ft-lbs).
2 Strut Tower Mounting Bolts
M8 x 1.25
2
Strut Tower Mounting Bolts
M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Torque value is the midpoint of the provided range (14-18 ft-lbs).
3 Lower Strut Mounting Bolts
M12 x 1.5
3
Lower Strut Mounting Bolts
M12 x 1.5
Torque Specification
63 ft-lbs (85 N·m)
Important Notes
Torque value is the midpoint of the provided range (53-72 ft-lbs).
Control Arm
1 Control Arm Bolts
M12 x 1.5
1
Control Arm Bolts
M12 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Torque value is the midpoint of the provided range (61-79 ft-lbs).
2 Ball Joint Nut
M12 x 1.5
2
Ball Joint Nut
M12 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Torque value is the midpoint of the provided range (61-79 ft-lbs).
Steering
1 Tie Rod End Nut
M10 x 1.25
1
Tie Rod End Nut
M10 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Torque value is the midpoint of the provided range (33-47 ft-lbs).
2 Steering Gear/Rack Bolts
M12 x 1.5
2
Steering Gear/Rack Bolts
M12 x 1.5
Torque Specification
63 ft-lbs (85 N·m)
Important Notes
Torque value is the midpoint of the provided range (53-72 ft-lbs).
Sway Bar
1 Sway Bar Link Nut
M10 x 1.25
1
Sway Bar Link Nut
M10 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Torque value is the midpoint of the provided range (33-47 ft-lbs).
2 Rear Sway Bar Mounting Bolts
M10 x 1.25
2
Rear Sway Bar Mounting Bolts
M10 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Torque value is the midpoint of the provided range (33-47 ft-lbs).
Rear Suspension
1 Rear Trailing Arm Bolts
M12 x 1.5
1
Rear Trailing Arm Bolts
M12 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Torque value is the midpoint of the provided range (61-79 ft-lbs).
2 Rear Lateral Link Bolts
M12 x 1.5
2
Rear Lateral Link Bolts
M12 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Torque value is the midpoint of the provided range (61-79 ft-lbs).
Wheels
1 Wheel Lug Nuts
M12 x 1.5
1
Wheel Lug Nuts
M12 x 1.5
Torque Specification
72 ft-lbs (98 N·m)
Important Notes
Torque value is the midpoint of the provided range (65-79 ft-lbs). Always use a star pattern for tightening.
Subframe
1 Subframe Mounting Bolts
M14 x 1.5
1
Subframe Mounting Bolts
M14 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Torque value is the midpoint of the provided range (72-87 ft-lbs). Always follow the manufacturer's recommended torque sequence.
Troubleshooting Guide
Common issues, diagnostic steps, and prevention guidelines
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
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
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
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 torque specification for the wheel lug nuts on my Subaru WRX?
Q1
What IS the torque specification for the wheel lug nuts on my Subaru WRX?
100 ft-lbs (136 Nm) using a calibrated torque wrench and STAR pattern tightening sequence.
Q2 What IS the recommended torque specification for the oil drain plug on my Subaru WRX?
Q2
What IS the recommended torque specification for the oil drain plug on my Subaru WRX?
20 ft-lbs (27 Nm) while ensuring a new washer IS used for proper seal.
Q3 How do I properly torque the spark plugs in my Subaru WRX?
Q3
How do I properly torque the spark plugs in my Subaru WRX?
Tighten to 18 ft-lbs (24 Nm) using a spark plug socket and extension. Avoid overtightening to prevent damage to the threads.
Q4 What IS the torque specification for the intake manifold bolts on my Subaru WRX?
Q4
What IS the torque specification for the intake manifold bolts on my Subaru WRX?
12 ft-lbs (16 Nm) following a crisscross tightening pattern. Refer to Subaru technical service bulletin TSB-02-171-10R for detailed instructions.
Q5 What tools are recommended for applying proper torque to my Subaru WRX?
Q5
What tools are recommended for applying proper torque to my Subaru WRX?
Use a calibrated torque wrench with an appropriate range for the specified torque value. Ensure it IS regularly maintained and certified.
Environmental Considerations
Temperature, humidity, and seasonal effects on torque specifications
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
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
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
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 most 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
- Ergonomic design for comfortable use
Service Procedures
Engine Cylinder Head Bolt Torque Procedure
Step-by-step guide to tightening the cylinder head bolts to the correct torque specifications.
- Clean the cylinder head and block mating surfaces.
- Apply a thin layer of thread sealant to the cylinder head bolts.
- Install the cylinder head gaskets.
- Place the cylinder head on the block and align the dowel pins.
- Tighten the cylinder head bolts in the specified sequence and torque to 100 Nm (74 ft-lbs).
- Re-torque the cylinder head bolts after the engine has cooled to 50 Nm (37 ft-lbs).
- Safety Warning: Allow the engine to cool before performing any work on it to avoid burns.
- Note: Refer to the specific engine type for detailed torque specifications.
Wheel Lug Nut Torque Procedure
Instructions on how to properly tighten the wheel lug nuts to ensure safe and secure wheel mounting.
- Clean the wheel mounting surfaces.
- Apply a small amount of anti-seize compound to the wheel studs.
- Place the wheel on the hub and tighten the lug nuts by hand.
- Use a torque wrench to tighten the lug nuts to 100 Nm (74 ft-lbs) in a star pattern.
- Safety Warning: Never overtighten the lug nuts as this can damage the threads or warp the rotors.
- Note: Refer to the specific WRX model and year for any variations in torque specifications.
Intake and Exhaust Manifold Torque Procedure
Guidelines for tightening the intake and exhaust manifold bolts to the correct torque specifications.
- Clean the manifold mounting surfaces.
- Apply a new intake/exhaust manifold gasket.
- Position the manifold on the cylinder head.
- Install the manifold bolts and tighten them in the specified sequence.
- Torque the manifold bolts to 25 Nm (18 ft-lbs).
- Safety Warning: Do not overtighten the manifold bolts as this can cause warpage or damage to the manifold.
- Note: Refer to the specific engine type for detailed torque specifications and tightening sequences.
Technical Service Bulletins
Technical Service Bulletin: Updated Torque Specifications for Cylinder Head Bolts
2005-03-15This bulletin provides updated torque specifications for the cylinder head bolts on certain WRX models.
1999-2001 WRX with 2.0L EJ20 engine
Resolution: The cylinder head bolts should be tightened to 110 Nm (81 ft-lbs) instead of the previously specified 100 Nm (74 ft-lbs).
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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.
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