Subaru Vehicle Models Subaru Legacy 2004-2008 Torque Specifications
Subaru Vehicle Models Subaru Legacy 2004-2008

Subaru Vehicle Models Subaru Legacy 2004-2008 Torque Specifications

Complete Subaru Vehicle Models Subaru Legacy 2004-2008 torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.

Updated

Important Information

Safety guidelines and reference information for proper torque application

Quick Reference Guide
ft-lbs → Nm
× 1.356
ft-lbs → kg-m
× 0.138
Nm → ft-lbs
× 0.738
in-lbs → ft-lbs
× 0.083

Common Torque Patterns

Star Pattern

Used for wheels and other circular bolt patterns

Star Pattern torque pattern diagram showing proper bolt tightening sequence
Cross Pattern

Used for gaskets and cover plates

Cross Pattern torque pattern diagram showing proper bolt tightening sequence
Sequential Pattern

Used for head bolts and other critical components

Sequential Pattern torque pattern diagram showing proper bolt tightening sequence

Common Mistakes to Avoid

Over-tightening

Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.

Prevention:

Always use a calibrated torque wrench and follow specifications exactly.

Incorrect Torque Sequence

Tightening bolts in the wrong order can cause uneven pressure distribution and potential leaks or damage.

Prevention:

Follow the manufacturer's specified torque sequence pattern.

Dirty Threads

Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.

Prevention:

Clean and inspect all threads before assembly. Use new thread locker if specified.

Reusing TTY Bolts

Torque-to-yield bolts are designed to stretch and must not be reused.

Prevention:

Always replace TTY bolts with new ones. They are single-use only.

Dry vs. Lubricated

Not accounting for whether torque specs are for dry or lubricated fasteners can lead to incorrect tension.

Prevention:

Check if specs are for dry or lubricated threads. Use specified lubricant when required.

Recommended Tools

Torque Wrench (1/4" Drive)

Range: 2-25 ft-lbs
Small fasteners, delicate components

Torque Wrench (3/8" Drive)

Range: 10-100 ft-lbs
Most common automotive fasteners

Torque Wrench (1/2" Drive)

Range: 30-250 ft-lbs
Large fasteners, wheels

Angle Gauge

Torque-to-yield (TTY) bolts

Torque Wrench Care

  • Calibrate annually or after 5,000 clicks
  • Store at lowest setting
  • Keep clean and lubricated

Search Specifications

Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

2.5l H4 Engine

Torque specifications for 2.5L-H4 Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.25
Torque Specification
1. 15 ft-lbs (20 N·m) 2. 22 ft-lbs (30 N·m)
Important Notes
Follow the manufacturer's torque sequence to ensure even clamping force.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
4 ft-lbs (5.4 N·m)
Important Notes
Use a crisscross pattern to tighten bolts evenly.

Crankshaft And Bearings

1

Main Bearing Bolts

M10 x 1.25
Torque Specification
54.5 ft-lbs (74 N·m)
Important Notes
Torque values are estimated based on similar engine configurations.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
32 ft-lbs (43.5 N·m)
Important Notes
Ensure proper alignment of connecting rods before tightening.

Timing System

1

Camshaft Sprocket Bolt

M12 x 1.25
Torque Specification
61.5 ft-lbs (83.5 N·m)
Important Notes
Ensure the timing marks are aligned before tightening.
2

Timing Belt Tensioner Bolt

M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure proper belt tension after tightening.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Use a crisscross pattern to tighten bolts evenly.
2

Exhaust Manifold Bolts

M8 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure proper alignment of the exhaust manifold before tightening.

Oil System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Use a crisscross pattern to tighten bolts evenly.
2

Oil Drain Plug

M14 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Replace the crush washer to prevent leaks.

3.0l H6 Engine

Torque specifications for 3.0L-H6 Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.25
Torque Specification
1. 15 ft-lbs (20 N·m) 2. 22 ft-lbs (30 N·m)
Important Notes
Follow a specific torque sequence as per the service manual.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
4 ft-lbs (5.4 N·m)
Important Notes
Over-tightening can damage the valve cover gasket.

Crankshaft And Bearings

1

Main Bearing Bolts

M11 x 1.5
Torque Specification
55 ft-lbs (74.6 N·m)
Important Notes
Ensure proper alignment of bearing caps before tightening.
2

Connecting Rod Nuts

M9 x 1.25
Torque Specification
32 ft-lbs (43.4 N·m)
Important Notes
Ensure proper alignment of connecting rods before tightening.

Timing System

1

Timing Belt Tensioner Bolt

M8 x 1.25
Torque Specification
26 ft-lbs (35.2 N·m)
Important Notes
Ensure proper tension of the timing belt before tightening.
2

Camshaft Sprocket Bolt

M12 x 1.5
Torque Specification
62 ft-lbs (84.1 N·m)
Important Notes
Use a holding tool to prevent camshaft rotation during tightening.

Engine Accessories

1

Alternator Mounting Bolts

M8 x 1.25
Torque Specification
19 ft-lbs (25.8 N·m)
Important Notes
Ensure proper belt tension after tightening.
2

A/C Compressor Mounting Bolts

M8 x 1.25
Torque Specification
19 ft-lbs (25.8 N·m)
Important Notes
Ensure proper belt tension after tightening.

4eat Transmission

Torque specifications for 4eat Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M10 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure proper alignment of the transmission before tightening. Torque in a crisscross pattern.
2

Transmission Crossmember Bolts

M10 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure the crossmember is properly aligned before tightening.

Oil Pan And Plugs

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Over-tightening can warp the oil pan. Torque in a crisscross pattern.
2

Transmission Drain Plug

M14 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Use a new crush washer to prevent leaks.
3

Transmission Fill Plug

M14 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure the fill plug is securely seated to prevent leaks.

Drivetrain Connections

1

Drive Axle/Half Shaft Bolts

M12 x 1.25
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure the axle is fully seated before tightening.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
166 ft-lbs (225 N·m)
Important Notes
Use a new cotter pin after tightening.
3

Propeller/Drive Shaft Bolts

M10 x 1.25
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure the drive shaft is properly aligned before tightening.

Starter And Bellhousing

1

Starter Motor Mounting Bolts

M8 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure the starter motor is properly aligned before tightening.
2

Transmission Bellhousing Bolts

M10 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure proper alignment of the transmission with the engine block.

Shift And Cooling

1

Transmission Shift Linkage Bolts

M6 x 1.0
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure the shift linkage is properly aligned before tightening.
2

Transmission Cooler Line Fittings

M12 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Use new O-rings to prevent leaks.

5eat Transmission

Torque specifications for 5eat Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute load.

Oil Pan

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Over-tightening can warp the oil pan or damage the gasket.
2

Transmission Drain Plug

M14 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure the drain plug is replaced with a new washer to prevent leaks.
3

Transmission Fill Plug

M14 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure the fill plug is replaced with a new washer to prevent leaks.

Driveline Connections

1

Drive Axle/Half Shaft Bolts

M12 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure bolts are tightened evenly to prevent misalignment.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
166 ft-lbs (225 N·m)
Important Notes
Ensure the axle is fully seated before torquing the nut.
3

Propeller/Drive Shaft Bolts

M12 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure bolts are tightened evenly to prevent driveline vibrations.

Starter Motor

1

Starter Motor Mounting Bolts

M8 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure the starter motor is properly aligned with the flywheel.

Bellhousing

1

Transmission Bellhousing Bolts

M10 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute load.

Torque Converter

1

Torque Converter Bolts

M8 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure the torque converter is fully seated before tightening bolts.

Shift Linkage

1

Transmission Shift Linkage Bolts

M6 x 1.0
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Ensure the shift linkage is properly aligned before tightening bolts.

Cooler Lines

1

Transmission Cooler Line Fittings

M10 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Ensure fittings are properly aligned and sealed to prevent leaks.

Valve Body

1

Transmission Valve Body Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Over-tightening can damage the valve body or cause internal leaks.

Body

Torque specifications for Body

Suspension And Steering

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
81.5 ft-lbs (110.5 N·m)
Important Notes
Torque value is the midpoint of the provided range (74-89 ft-lbs / 100-121 Nm). Always use a crisscross pattern when tightening lug nuts.
2

Strut/Shock Absorber Mounting Bolts

M10 x 1.25
Torque Specification
19.5 ft-lbs (26.5 N·m)
Important Notes
Torque value is the midpoint of the provided range (17-22 ft-lbs / 23-29 Nm). Ensure the suspension is at ride height before tightening.
3

Control Arm Bolts

M12 x 1.75
Torque Specification
39.5 ft-lbs (53.5 N·m)
Important Notes
Torque value is the midpoint of the provided range (36-43 ft-lbs / 49-58 Nm). Ensure the suspension is at ride height before tightening.
4

Ball Joint Nut

M12 x 1.75
Torque Specification
39.5 ft-lbs (53.5 N·m)
Important Notes
Torque value is the midpoint of the provided range (36-43 ft-lbs / 49-58 Nm).
5

Tie Rod End Nut

M12 x 1.75
Torque Specification
39.5 ft-lbs (53.5 N·m)
Important Notes
Torque value is the midpoint of the provided range (36-43 ft-lbs / 49-58 Nm).
6

Sway Bar Link Nut

M10 x 1.25
Torque Specification
36 ft-lbs (48.5 N·m)
Important Notes
Torque value is the midpoint of the provided range (29-43 ft-lbs / 39-58 Nm).
7

Steering Gear/Rack Bolts

M14 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Torque value is the midpoint of the provided range (58-72 ft-lbs / 79-98 Nm). Tighten bolts in a crisscross pattern.

Fuel System

1

Fuel Tank Strap Bolts

M8 x 1.25
Torque Specification
19.5 ft-lbs (26.5 N·m)
Important Notes
Torque value is the midpoint of the provided range (16-23 ft-lbs / 21-31 Nm).
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Torque value is the midpoint of the provided range (6-10 ft-lbs / 8-14 Nm).

Electrical System

1

Battery Terminal Nuts

M6 x 1.0
Torque Specification
6 ft-lbs (8.5 N·m)
Important Notes
Torque value is the midpoint of the provided range (5-7 ft-lbs / 7-10 Nm).

Body Structure

1

Body Mount Bolts

M10 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque value is the midpoint of the provided range (18-22 ft-lbs / 24-30 Nm).
2

Door Hinge Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque value is the midpoint of the provided range (18-22 ft-lbs / 24-30 Nm).
3

Hood Hinge Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque value is the midpoint of the provided range (18-22 ft-lbs / 24-30 Nm).
4

Trunk Lid Hinge Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque value is the midpoint of the provided range (18-22 ft-lbs / 24-30 Nm).
5

Bumper Mounting Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque value is the midpoint of the provided range (18-22 ft-lbs / 24-30 Nm).
6

Seat Mounting Bolts

M10 x 1.25
Torque Specification
39.5 ft-lbs (53.5 N·m)
Important Notes
Torque value is the midpoint of the provided range (36-43 ft-lbs / 49-58 Nm). Tighten bolts in a crisscross pattern.
7

Seat Belt Anchor Bolts

M10 x 1.25
Torque Specification
39.5 ft-lbs (53.5 N·m)
Important Notes
Torque value is the midpoint of the provided range (36-43 ft-lbs / 49-58 Nm).

Brakes

Torque specifications for Brakes

Brake Caliper

1

Brake Caliper Bolts

M10 x 1.25
Torque Specification
19.5 ft-lbs (26.5 N·m)
Important Notes
Estimated value based on typical M10 bolt torque for brake calipers.
2

Brake Caliper Mounting Bracket Bolts

M12 x 1.25
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Estimated value based on typical M12 bolt torque for brake brackets.

Brake Rotor

1

Brake Disc/Drum Retaining Bolts

M8 x 1.25
Torque Specification
39.5 ft-lbs (53.5 N·m)
Important Notes
Estimated value based on typical M8 bolt torque for brake rotors.

Brake Hydraulics

1

Brake Hose Banjo Bolt

M10 x 1.0
Torque Specification
19.5 ft-lbs (26.5 N·m)
Important Notes
Estimated value based on typical M10 banjo bolt torque for brake hoses.
2

Brake Master Cylinder Mounting Bolts

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value based on typical M8 bolt torque for master cylinders.
3

Brake Booster Mounting Bolts

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value based on typical M8 bolt torque for brake boosters.

Brake Pedal

1

Brake Pedal Assembly Bolts

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value based on typical M8 bolt torque for pedal assemblies.

Wheel Assembly

1

Wheel Lug Nuts

M12 x 1.25
Torque Specification
81.5 ft-lbs (110.5 N·m)
Important Notes
Estimated value based on typical M12 lug nut torque for passenger vehicles.

Drivetrain

Torque specifications for Drivetrain

Flywheel And Crankshaft

1

Flywheel Bolts

M10 x 1.25
Torque Specification
62 ft-lbs (84 N·m)
Important Notes
Ensure the flywheel is properly aligned before torquing. Torque in a crisscross pattern.
2

Crankshaft Pulley/Harmonic Balancer Bolt

M12 x 1.5
Torque Specification
112 ft-lbs (152 N·m)
Important Notes
Use a holding tool to prevent the crankshaft from rotating during torquing.

Transmission And Mounting

1

Transmission Mounting Bolts

M10 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure the transmission is properly aligned before torquing.
2

Transmission Bellhousing Bolts

M10 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure proper alignment of the bellhousing to the engine block.

Drive Axles And Cv Joints

1

Drive Axle/Half Shaft Bolts

M12 x 1.25
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure the axle is properly seated before torquing.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
166 ft-lbs (225 N·m)
Important Notes
Use a torque wrench with a deep socket to access the axle nut.

Differential And Transfer Case

1

Differential Mounting Bolts

M12 x 1.25
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure the differential is properly aligned before torquing.
2

Transfer Case Mounting Bolts

M12 x 1.25
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure the transfer case is properly aligned before torquing.

Fluid System Plugs

1

Transmission Drain and Fill Plugs

M14 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure the threads are clean and free of debris before installation.
2

Differential Drain/Fill Plug

M14 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure the threads are clean and free of debris before installation.
3

Transfer Case Drain/Fill Plug

M14 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure the threads are clean and free of debris before installation.

Clutch System

1

Clutch Pressure Plate Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure the pressure plate is properly aligned before torquing.

Rear Axle Hub

1

Rear Axle Hub Nut

M24 x 1.5
Torque Specification
166 ft-lbs (225 N·m)
Important Notes
Use a torque wrench with a deep socket to access the hub nut.

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Bolt

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

Starting System

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure the starter motor is properly aligned with the flywheel before tightening.

Charging System

1

Alternator Mounting Bolts

M8 x 1.25
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Ensure proper belt tension after tightening the alternator bolts.

Battery System

1

Battery Terminal Nuts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Avoid overtightening to prevent damage to the battery terminals.

Fuel System

1

Fuel Injector Bolts

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

Grounding System

1

Ground Strap Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on similar M6 bolts in electrical systems.

Engine Management System

1

ECU Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on similar M6 bolts in electrical systems.

Electrical Distribution System

1

Fuse Box Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on similar M6 bolts in electrical systems.
2

Wiring Harness Clamp Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value based on similar M6 bolts in electrical systems.

Emissions Sensors

Torque specifications for Emissions_sensors

Egr System

1

EGR Valve Bolts

M8 x 1.25
Torque Specification
14.5 ft-lbs (20 N·m)
Important Notes
Estimated value based on typical M8 bolt torque for emissions components.
2

EGR Pipe Bolts

M6 x 1.0
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value based on typical M6 bolt torque for emissions components.

Exhaust Manifold

1

Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
1. 29 ft-lbs (39 N·m) 2. 43 ft-lbs (58 N·m)
Important Notes
Torque sequence must be followed to ensure even clamping force.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
18.5 ft-lbs (25 N·m)
Important Notes
Estimated value based on typical M8 bolt torque for exhaust components.

Exhaust Pipe

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Estimated value based on typical M10 bolt torque for exhaust components.
2

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Estimated value based on typical M10 bolt torque for exhaust components.
3

Catalytic Converter Heat Shield Bolts

M6 x 1.0
Torque Specification
8.5 ft-lbs (12 N·m)
Important Notes
Estimated value based on typical M6 bolt torque for heat shields.

Oxygen Sensors

1

Oxygen Sensor (O2 Sensor) Mounting

M18 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value based on typical M18 bolt torque for oxygen sensors.

Air Injection System

1

Air Injection System (AIS) Bolts

M6 x 1.0
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value based on typical M6 bolt torque for emissions components.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold Headers

1

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Torque value is an average estimate based on typical M10 bolts in exhaust applications.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Torque value is an average estimate based on typical M8 bolts in exhaust applications.

Exhaust Pipe Connections

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Torque value is an average estimate based on typical M10 bolts in exhaust applications.
2

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Torque value is an average estimate based on typical M10 bolts in exhaust applications.
3

Muffler to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque value is an average estimate based on typical M8 bolts in exhaust applications.

Exhaust Accessories

1

Exhaust Heat Shield Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Torque value is an average estimate based on typical M6 bolts in exhaust applications.
2

Exhaust Hanger Bolts

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Torque value is an average estimate based on typical M8 bolts in exhaust applications.
3

Oxygen Sensor (O2 Sensor)

M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Torque value is an average estimate based on typical M12 bolts in exhaust applications.
4

Exhaust Flange Bolts (Mid-Pipe to Rear Pipe)

M10 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Torque value is an average estimate based on typical M10 bolts in exhaust applications.

Fuel

Torque specifications for Fuel

Fuel Rail System

1

Fuel Rail Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Torque values are based on typical M8 bolt specifications. Ensure bolts are tightened in a crisscross pattern.
2

Fuel Injector Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Torque values are based on typical M6 bolt specifications. Avoid over-tightening to prevent damage to the injector seals.
3

Fuel Pressure Regulator Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Torque values are estimated based on similar M6 bolt applications. Ensure regulator is properly seated before tightening.

Fuel Tank System

1

Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque values are based on typical M8 bolt specifications. Ensure pump is properly aligned before tightening.
2

Fuel Tank Strap Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque values are based on typical M8 bolt specifications. Ensure straps are evenly tightened to prevent tank movement.
3

Fuel Tank Sender Unit Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Torque values are estimated based on similar M6 bolt applications. Ensure sender unit gasket is properly seated.
4

Fuel Tank Drain Plug

M12 x 1.5
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Torque values are based on typical M12 bolt specifications. Ensure plug is properly sealed to prevent leaks.

Fuel Delivery System

1

Fuel Filter Bolt/Nut

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Torque values are based on typical M8 bolt specifications. Ensure filter is properly aligned before tightening.
2

Fuel Line Flare Nut Fittings

M12 x 1.5
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Torque values are based on typical M12 flare nut specifications. Avoid over-tightening to prevent damage to the flare.

Fuel Filler System

1

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Torque values are estimated based on similar M6 bolt applications. Ensure filler neck is properly aligned before tightening.

Hvac

Torque specifications for Hvac

Air Conditioning System

1

A/C Compressor Mounting Bolts

M10 x 1.5
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Estimated average value from specified range (17-21 ft-lbs).
2

A/C Line Fittings

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated average value from specified range (14-20 ft-lbs).
3

A/C Condenser Mounting Bolts

M8 x 1.25
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on industry standards.
4

A/C Evaporator Mounting Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value based on industry standards.
5

A/C Refrigerant Line Bracket Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value based on industry standards.
6

A/C Compressor Clutch Pulley Bolt

M12 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated average value from specified range (20-25 ft-lbs).

Suspension

Torque specifications for Suspension

Strut Shock Absorber

1

Strut/Shock Absorber Mounting Bolts

M10 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated bolt size based on typical Subaru designs.
2

Strut Tower Mounting Bolts

M10 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated bolt size based on typical Subaru designs.
3

Lower Strut Mounting Bolts

M12 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated bolt size based on typical Subaru designs.

Control Arm Ball Joint

1

Control Arm Bolts

M12 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated bolt size based on typical Subaru designs.
2

Ball Joint Nut

M12 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated bolt size based on typical Subaru designs.

Steering Components

1

Tie Rod End Nut

M12 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated bolt size based on typical Subaru designs.
2

Steering Knuckle Bolts

M14 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Estimated bolt size based on typical Subaru designs.

Sway Bar

1

Sway Bar Link Nut

M10 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Estimated bolt size based on typical Subaru designs.

Wheels

1

Wheel Lug Nuts

M12 x 1.25
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Torque sequence is critical for even clamping force.

Drivetrain

1

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
166 ft-lbs (225 N·m)
Important Notes
Estimated bolt size based on typical Subaru designs.

Subframe

1

Subframe Mounting Bolts

M14 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Torque sequence is critical for even clamping force.

Rear Suspension

1

Rear Trailing Arm Bolts

M14 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Torque sequence is critical for even clamping force.

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 of my 2006 Subaru Legacy?

The recommended torque for the lug nuts of a 2006 Subaru Legacy IS 85 ft-lbs (115 Nm). Refer to the vehicle's service manual for specific values applicable to different model years and trim levels.

Q2

How do I properly tighten a torque bolt using a torque wrench?

1. Ensure the torque wrench IS properly calibrated. 2. Clean and lubricate the bolt and threads according to Subaru specifications. 3. Align the torque wrench perpendicular to the bolt head. 4. Apply steady, even force until the desired torque value IS reached. 5. Release the torque wrench and verify the tightness of the bolt.

Q3

What happens if a bolt IS torqued too loosely or too tightly?

Torquing a bolt too loosely may compromise the joint's integrity, leading to potential failures or leaks. Conversely, over-torquing can damage the bolt, threads, or surrounding components, increasing the risk of breakage or stripping.

Q4

IS it safe to use a torque multiplier?

Torque multipliers amplify the torque output of a torque wrench, but they should be used with caution. Misuse or improper calibration can result in excessive torque and potential damage to components. Refer to the manufacturer's instructions and Subaru guidelines for safe torque multiplier operation

Q5

Can I use a regular wrench to tighten torque bolts?

No, it IS not recommended to use a regular wrench to tighten torque bolts. Regular wrenches do not provide precise torque control, increasing the risk of over- or under-tightening. Always use a calibrated torque wrench for accurate and safe torque application.

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 Legacy.

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

Socket Set (10mm-24mm)

Includes a range of sockets to accommodate various bolt sizes found on the Legacy, ensuring proper fit and grip.

  • Durable chrome vanadium steel construction
  • Knurled grips for secure handling
  • Organized case for easy storage and transportation
Learn more

Service Manual for 2004-2008 Subaru Legacy

Provides detailed torque specifications for every bolt and fastener on the Legacy, ensuring accurate and safe assembly.

  • Comprehensive coverage of all maintenance and repair procedures
  • Step-by-step instructions with clear illustrations
  • Factory-recommended torque values for all components
Learn more
Service Procedures

Tightening Engine Head Bolts

Outlines the proper tightening sequence and torque values for the engine head bolts, critical for maintaining engine integrity and preventing leaks.

  • Clean all bolt threads and surfaces thoroughly.
  • Apply a light coat of engine oil to the bolt threads.
  • Install the head bolts finger-tight, then torque them to 20 Nm (14.5 ft-lb).
  • Follow the specified tightening sequence and repeat the torquing process, increasing the torque to 65 Nm (47.9 ft-lb).
  • Finally, tighten the bolts to the final torque of 95 Nm (69.9 ft-lb) in two stages.
View full procedure

Replacing Transmission Mount

Provides instructions for replacing the transmission mount, ensuring proper fit and support for the transmission.

  • Support the engine and transmission with a jack and jack stands.
  • Locate the four bolts securing the transmission mount.
  • Loosen the bolts but do not remove them.
  • Position the new transmission mount and hand-tighten the bolts.
  • Torque the bolts to the specified torque of 54 Nm (39.8 ft-lb).
View full procedure

Adjusting Wheel Bearing Nut

Describes the procedure for adjusting the torque on the wheel bearing nut, ensuring proper wheel rotation and safety.

  • Raise the vehicle and remove the tire.
  • Place a torque wrench on the wheel bearing nut.
  • Tighten the nut to the specified torque of 181 Nm (133.6 ft-lb).
  • Loosen the nut 1/6 of a turn.
  • Retorque the nut to 20 Nm (14.5 ft-lb) and tighten it an additional 45 degrees.
View full procedure
Technical Service Bulletins

Service Bulletin: Incorrect Engine Head Bolt Torque Specifications

2006-03-01

Corrects previous torque specifications for the engine head bolts, addressing potential engine damage concerns.

2004-2008 Legacy

Resolution: Update the torque specifications for the engine head bolts to 95 Nm (69.9 ft-lb) instead of the previously specified 85 Nm (62.6 ft-lb).

Service Bulletin: Revised Wheel Bearing Nut Torque Specifications

2007-06-15

Updates the torque specifications for the wheel bearing nut, addressing concerns related to bearing failure.

2004-2008 Legacy

Resolution: Revise the wheel bearing nut torque specifications to 181 Nm (133.6 ft-lb) followed by loosening 1/6 of a turn and re-torquing to 20 Nm (14.5 ft-lb) with an additional 45-degree turn.

Legal Disclaimer

Important information about using this content

Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.

General Information
The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.
Warranty & Liability

The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.

We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.

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.
Intellectual Property
All content, including text, images, and specifications, is protected by copyright and other intellectual property laws. Any unauthorized use or reproduction is prohibited.

About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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

Facebook Contact
15+ Years
Experience
500+ Guides
Guides
50+ Makes
Vehicles
1000+ Solutions
Solutions

Diagnostic

Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.

Repair

Expert in both traditional mechanical repairs and modern vehicle systems.

Additional Expertise

Documentation

Created over 500 detailed repair guides and technical documents.

Training

Conducted technical training sessions and contributed to repair databases.

Certifications & Research

Certifications

  • ASE Master Technician Certification
  • Advanced Diagnostic Specialist
  • Hybrid/Electric Vehicle Systems
  • Performance Tuning Expert

Research & Community

Actively researches emerging technologies and contributes to automotive forums.

© 2025 Subaru Specs. All rights reserved.

Privacy Policy Terms of Service