Subaru Vehicle Models Subaru Impreza 2000-2007 Torque Specifications
Subaru Vehicle Models Subaru Impreza 2000-2007

Subaru Vehicle Models Subaru Impreza 2000-2007 Torque Specifications

Complete Subaru Vehicle Models Subaru Impreza 2000-2007 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. 22 ft-lbs (30 N·m) 2. 28 ft-lbs (38 N·m)
Important Notes
Follow the manufacturer's torque sequence for cylinder head bolts to ensure even clamping force.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
5.6 ft-lbs (6.8 N·m)
Important Notes
Use a torque wrench calibrated in inch-lbs for accuracy.

Crankshaft And Bearings

1

Main Bearing Bolts

M12 x 1.25
Torque Specification
54 ft-lbs (73 N·m)
Important Notes
Ensure the bearing caps are properly aligned before tightening.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Ensure the connecting rod bearings are properly seated before tightening.

Timing System

1

Camshaft Sprocket Bolt

M12 x 1.25
Torque Specification
58 ft-lbs (78 N·m)
Important Notes
Ensure the camshaft is properly aligned before tightening.
2

Timing Belt Tensioner Bolt

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

Oil System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.
2

Oil Drain Plug

M14 x 1.5
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Replace the crush washer with a new one during installation.

4eat Transmission

Torque specifications for 4eat Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M10 x 1.25
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Ensure even tightening in a crisscross pattern to prevent misalignment.
2

Transmission Crossmember Bolts

M12 x 1.5
Torque Specification
50.5 ft-lbs (68 N·m)
Important Notes
Estimated value based on similar crossmember bolts. Ensure crossmember is properly aligned before tightening.

Transmission Fluid System

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Ensure gasket is properly seated before tightening. Tighten in a crisscross pattern to prevent leaks.
2

Transmission Drain Plug

M14 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Ensure washer is in good condition or replace with a new one.
3

Transmission Fill Plug

M14 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Ensure washer is in good condition or replace with a new one.

Driveline Components

1

Drive Axle/Half Shaft Bolts

M10 x 1.25
Torque Specification
61.5 ft-lbs (83 N·m)
Important Notes
Ensure axle is fully seated in the transmission before tightening.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
141 ft-lbs (191 N·m)
Important Notes
Ensure axle is fully seated in the wheel hub before tightening.
3

Propeller/Drive Shaft Bolts

M8 x 1.25
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Ensure drive shaft is properly aligned with transmission output flange.

Starter And Bell Housing

1

Starter Motor Mounting Bolts

M10 x 1.25
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Ensure starter motor is properly aligned with bell housing.
2

Transmission Bell Housing Bolts

M10 x 1.25
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Ensure bell housing is properly aligned with engine block.

Torque Converter And Shift Linkage

1

Torque Converter Bolts

M8 x 1.25
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Ensure torque converter is properly seated on flexplate before tightening.
2

Shift Linkage Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20.5 N·m)
Important Notes
Ensure shift linkage is properly aligned with transmission.

Transmission Cooler System

1

Transmission Cooler Line Fittings

M12 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure fittings are properly aligned and seated before tightening.

Body

Torque specifications for Body

Fuel System

1

Fuel Tank Strap Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure even tightening to avoid damaging the fuel tank or straps.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Avoid over-tightening to prevent damage to the filler neck or body panel.

Electrical System

1

Battery Terminal Nuts

M6 x 1.0
Torque Specification
4 ft-lbs (5.5 N·m)
Important Notes
Ensure proper electrical connection without over-tightening.

Safety System

1

Seat Belt Anchorage Bolts

M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Critical for safety; ensure proper torque to withstand crash forces.
2

Seat Mounting Bolts

M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure seats remain securely attached during normal use and collisions.

Body Panels

1

Door Hinge Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure proper alignment and smooth operation of the door.
2

Hood Hinge Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure proper alignment and secure attachment of the hood.
3

Trunk Lid Hinge Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure proper alignment and smooth operation of the trunk lid.

Exterior Accessories

1

Bumper Mounting Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure proper alignment and secure attachment of the bumper.
2

Roof Rack Mounting Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure secure attachment to support the intended load.

Brakes

Torque specifications for Brakes

Brake Caliper

1

Brake Caliper Bolts

M10 x 1.25
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Torque values are based on typical M10 bolts. Ensure proper alignment of the caliper during installation.
2

Brake Caliper Mounting Bracket Bolts

M12 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Torque values are based on typical M12 bolts. Ensure the bracket is securely attached to the steering knuckle or axle.

Brake Rotor Drum

1

Brake Disc/Drum Retaining Bolts

M10 x 1.25
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Torque values are based on typical M10 bolts. Ensure the rotor or drum is seated properly on the hub.

Brake Hydraulics

1

Brake Hose Banjo Bolt

M8 x 1.0
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Torque values are based on typical M8 bolts. Ensure the sealing washers are properly installed.
2

Brake Master Cylinder Mounting Bolts

M6 x 1.0
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Torque values are based on typical M6 bolts. Ensure the master cylinder is properly aligned with the brake booster.
3

Brake Booster Mounting Bolts

M6 x 1.0
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Torque values are based on typical M6 bolts. Ensure the booster is securely attached to the firewall.

Brake Pedal

1

Brake Pedal Assembly Bolts

M6 x 1.0
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Torque values are based on typical M6 bolts. Ensure the pedal assembly is properly aligned with the master cylinder pushrod.

Abs System

1

ABS Sensor Mounting Bolts

M5 x 0.8
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Torque values are based on typical M5 bolts. Ensure the sensor is properly aligned with the tone ring.

Wheel Assembly

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Torque values are based on typical M12 bolts. Always use a torque wrench for wheel lug nuts to prevent over-tightening.

Drivetrain

Torque specifications for Drivetrain

Flywheel

1

Flywheel Bolts

M10 x 1.25
Torque Specification
61.5 ft-lbs (83 N·m)
Important Notes
Torque value is the midpoint of the specified range (58-65 ft-lbs / 78-88 Nm).

Transmission Mounting

1

Transmission Mounting Bolts

M8 x 1.25
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Torque value is the midpoint of the specified range (29-36 ft-lbs / 39-49 Nm).

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
12.5 ft-lbs (16.5 N·m)
Important Notes
Torque value is the midpoint of the specified range (12-13 ft-lbs / 16-17 Nm).

Transmission Plugs

1

Transmission Drain Plug

M12 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Torque value is the midpoint of the specified range (29-36 ft-lbs / 39-49 Nm).
2

Transmission Fill Plug

M12 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Torque value is the midpoint of the specified range (29-36 ft-lbs / 39-49 Nm).

Drive Axle

1

Drive Axle/Half Shaft Bolts

M10 x 1.25
Torque Specification
61.5 ft-lbs (83 N·m)
Important Notes
Torque value is the midpoint of the specified range (58-65 ft-lbs / 78-88 Nm).
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
141 ft-lbs (191 N·m)
Important Notes
Torque value is the midpoint of the specified range (137-145 ft-lbs / 186-197 Nm).

Propeller Shaft

1

Propeller/Drive Shaft Bolts

M8 x 1.25
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Torque value is the midpoint of the specified range (22-29 ft-lbs / 30-39 Nm).

Differential

1

Differential Drain Plug

M14 x 1.5
Torque Specification
39.5 ft-lbs (53.5 N·m)
Important Notes
Torque value is the midpoint of the specified range (36-43 ft-lbs / 49-58 Nm).
2

Differential Fill Plug

M14 x 1.5
Torque Specification
39.5 ft-lbs (53.5 N·m)
Important Notes
Torque value is the midpoint of the specified range (36-43 ft-lbs / 49-58 Nm).
3

Differential Mounting Bolts

M12 x 1.75
Torque Specification
79.5 ft-lbs (108 N·m)
Important Notes
Torque value is the midpoint of the specified range (72-87 ft-lbs / 98-118 Nm).
4

Rear Differential Pinion Flange Bolts

M10 x 1.25
Torque Specification
61.5 ft-lbs (83 N·m)
Important Notes
Torque value is the midpoint of the specified range (58-65 ft-lbs / 78-88 Nm).
5

Front Differential Carrier Bolts

M12 x 1.75
Torque Specification
79.5 ft-lbs (108 N·m)
Important Notes
Torque value is the midpoint of the specified range (72-87 ft-lbs / 98-118 Nm).

Transfer Case

1

Transfer Case Drain Plug

M12 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Torque value is the midpoint of the specified range (29-36 ft-lbs / 39-49 Nm).
2

Transfer Case Fill Plug

M12 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Torque value is the midpoint of the specified range (29-36 ft-lbs / 39-49 Nm).
3

Transfer Case Mounting Bolts

M12 x 1.75
Torque Specification
79.5 ft-lbs (108 N·m)
Important Notes
Torque value is the midpoint of the specified range (72-87 ft-lbs / 98-118 Nm).

Transmission Bellhousing

1

Transmission Bellhousing Bolts

M10 x 1.25
Torque Specification
61.5 ft-lbs (83 N·m)
Important Notes
Torque value is the midpoint of the specified range (58-65 ft-lbs / 78-88 Nm).

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Bolt

M6 x 1.0
Torque Specification
5.5 ft-lbs (7.5 N·m)
Important Notes
Estimated value based on typical M6 bolt torque for electrical components.

Starting System

1

Starter Motor 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.

Charging System

1

Alternator 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.

Battery System

1

Battery Terminal Nuts

M6 x 1.0
Torque Specification
4 ft-lbs (5.5 N·m)
Important Notes
Torque value is the midpoint of the provided range.

Grounding System

1

Ground Strap Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (10.5 N·m)
Important Notes
Estimated value based on typical M6 bolt torque for grounding components.

Electrical Control System

1

Fuse Box Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (10.5 N·m)
Important Notes
Estimated value based on typical M6 bolt torque for electrical components.
2

ECU (Engine Control Unit) Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (10.5 N·m)
Important Notes
Estimated value based on typical M6 bolt torque for electrical components.
3

Wiring Harness Clamp Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value based on typical M6 bolt torque for securing wiring harnesses.

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust Manifold Headers

1

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Torque value is the midpoint of the provided range (29-36 ft-lbs).
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Torque value is the midpoint of the provided range (22-28 ft-lbs).

Exhaust Pipe Connections

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Torque value is the midpoint of the provided range (29-36 ft-lbs).
2

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Torque value is the midpoint of the provided range (29-36 ft-lbs).

Emissions Control Components

1

EGR Valve Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Torque value is the midpoint of the provided range (14-16 ft-lbs).
2

Oxygen Sensor (O2 Sensor)

M18 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated torque value based on similar components and bolt sizes.
3

Catalytic Converter Heat Shield Bolts

M6 x 1.0
Torque Specification
13.5 ft-lbs (18 N·m)
Important Notes
Torque value is the midpoint of the provided range (12-15 ft-lbs).
4

PCV Valve Mounting Bolt

M6 x 1.0
Torque Specification
8.5 ft-lbs (11.5 N·m)
Important Notes
Torque value is the midpoint of the provided range (7-10 ft-lbs).

Exhaust

Torque specifications for Exhaust

Exhaust Manifold Headers

1

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure.
2

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure a tight connection to prevent exhaust leaks.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure a tight connection to prevent exhaust leaks.

Muffler

1

Muffler to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure a tight connection to prevent exhaust leaks.

Heat Shield

1

Exhaust Heat Shield Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Estimated value based on typical heat shield bolt sizes.

Exhaust Hanger

1

Exhaust Hanger Bolts

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Estimated value based on typical exhaust hanger bolt sizes.

Oxygen Sensor

1

Oxygen Sensor (O2 Sensor)

M12 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure a tight connection to prevent exhaust leaks.

Exhaust Flange

1

Exhaust Flange Bolts (Downpipe to Midpipe)

M10 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure a tight connection to prevent exhaust leaks.

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
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure.
2

Fuel Injector Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure injectors are properly seated before tightening.

Fuel Delivery System

1

Fuel Pump Mounting Bolts

M10 x 1.5
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

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure the fuel tank is properly aligned before tightening.
3

Fuel Tank Sender Unit Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the sender unit gasket is properly seated.

Fuel Filler And Evaporative System

1

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Ensure the filler neck gasket is properly seated.
2

Fuel Evaporative Canister Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the canister is properly aligned before tightening.

Fuel Filter And Pressure Regulation

1

Fuel Filter Bolt/Nut

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure the filter housing gasket is properly seated.
2

Fuel Pressure Regulator Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the regulator is properly aligned before tightening.

Fuel Line Connections

1

Fuel Line Fittings

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure fittings are properly aligned and seated.

Hvac

Torque specifications for Hvac

Ac Compressor

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
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque value is the midpoint of the provided range (18-22 ft-lbs).

Evaporator

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). Estimated based on similar HVAC components.

Heater Core

1

Heater Core Mounting 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). Estimated based on similar HVAC components.

Blower Motor

1

Blower Motor Mounting 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). Estimated based on similar HVAC components.

Condenser

1

Condenser 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). Estimated based on similar HVAC components.

Control Panel

1

HVAC Control Panel Mounting Screws

M4 x 0.7
Torque Specification
3 ft-lbs (4 N·m)
Important Notes
Torque value is the midpoint of the provided range (2-4 ft-lbs). Estimated based on similar HVAC components.

Suspension

Torque specifications for Suspension

Strut Shock Absorber

1

Strut/Shock Absorber Mounting Bolts

M10 x 1.25
Torque Specification
34 ft-lbs (46 N·m)
Important Notes
Torque value is an average of the specified range (32-36 ft-lbs).
2

Strut Tower Bolts

M10 x 1.25
Torque Specification
34 ft-lbs (46 N·m)
Important Notes
Torque value is an average of the specified range (32-36 ft-lbs).

Control Arms

1

Control Arm Bolts

M12 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Torque value is an average of the specified range (72-87 ft-lbs).
2

Ball Joint Nut

M10 x 1.25
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Torque value is an average of the specified range (43-58 ft-lbs).

Steering

1

Tie Rod End Nut

M10 x 1.25
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Torque value is an average of the specified range (40-47 ft-lbs).
2

Steering Gear/Rack Bolts

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

Sway Bar

1

Sway Bar Link Nut

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Torque value is an average of the specified range (21-29 ft-lbs).
2

Rear Sway Bar Mounting Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Torque value is an average of the specified range (21-29 ft-lbs).

Wheels Drive Axles

1

Wheel Lug Nuts

M12 x 1.25
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Torque value is an average of the specified range (72-87 ft-lbs).
2

Drive Axle/Half Shaft Bolts

M12 x 1.5
Torque Specification
62 ft-lbs (84 N·m)
Important Notes
Torque value is an average of the specified range (58-65 ft-lbs).
3

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
141 ft-lbs (191 N·m)
Important Notes
Torque value is an average of the specified range (137-145 ft-lbs).

Rear Suspension

1

Rear Trailing Arm Bolts

M12 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Torque value is an average of the specified range (72-87 ft-lbs).
2

Rear Lateral Link Bolts

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

Subframe

1

Subframe Bolts

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

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 torque specification for the lug nuts on a 2000-2007 Subaru Impreza?

The torque specification for the lug nuts on a 2000-2007 Subaru Impreza IS 80 ft-lbs (108 Nm).

Q2

What IS the torque specification for the spark plugs on a 2000-2007 Subaru Impreza?

The torque specification for the spark plugs on a 2000-2007 Subaru Impreza IS 18 ft-lbs (24 Nm).

Q3

What IS the torque specification for the oil drain plug on a 2000-2007 Subaru Impreza?

The torque specification for the oil drain plug on a 2000-2007 Subaru Impreza IS 29 ft-lbs (39 Nm).

Q4

What IS the torque specification for the water pump bolts on a 2000-2007 Subaru Impreza?

The torque specification for the water pump bolts on a 2000-2007 Subaru Impreza IS 10 ft-lbs (13 Nm).

Q5

What IS the torque specification for the timing belt tensioner bolt on a 2000-2007 Subaru Impreza?

The torque specification for the timing belt tensioner bolt on a 2000-2007 Subaru Impreza IS 44 ft-lbs (59 Nm).

Q6

What IS the torque specification for the crankshaft pulley bolt on a 2000-2007 Subaru Impreza?

The torque specification for the crankshaft pulley bolt on a 2000-2007 Subaru Impreza IS 92 ft-lbs (124 Nm).

Q7

What IS the torque specification for the flywheel bolts on a 2000-2007 Subaru Impreza?

The torque specification for the flywheel bolts on a 2000-2007 Subaru Impreza IS 76 ft-lbs (103 Nm).

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 impreza.

  • 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 Cylinder Head Bolt Torque Sequence

Step-by-step instructions for properly tightening cylinder head bolts on the impreza.

  • Clean cylinder head and block surfaces.
  • Apply a thin layer of engine oil to bolt threads.
  • Tighten bolts to 25 Nm (18.4 ft-lb) in the sequence shown in the service manual.
  • Tighten bolts to 50 Nm (36.9 ft-lb) in the same sequence.
  • Tighten bolts to 75 Nm (55.3 ft-lb) in the same sequence.
View full procedure

Front Wheel Bearing Hub Nut Torque

Procedure for replacing and adjusting the front wheel bearing hub nut on the impreza.

  • Raise the vehicle and support it securely.
  • Remove the front wheel.
  • Use a 36 mm socket and torque wrench to tighten the hub nut to 150 Nm (110.6 ft-lb).
  • Install the front wheel and lower the vehicle.
  • Check and adjust the wheel alignment as necessary.
View full procedure

Spark Plug Torque

Technical procedure for properly replacing and tightening spark plugs on the impreza.

  • Remove the ignition coil.
  • Use a spark plug socket and ratchet to remove the old spark plug.
  • Apply a small amount of anti-seize compound to the threads of the new spark plug.
  • Tighten the new spark plug to 25 Nm (18.4 ft-lb).
  • Reinstall the ignition coil.
View full procedure

Control Arm Bolt Torque

Detailed procedure for replacing and tightening control arm bolts on the impreza.

  • Raise the vehicle and support it securely.
  • Remove the wheel.
  • Use a 19 mm socket and torque wrench to tighten the control arm bolts to 120 Nm (88.5 ft-lb).
  • Reinstall the wheel and lower the vehicle.
  • Check and adjust the wheel alignment as necessary.
View full procedure
Technical Service Bulletins

Technical Service Bulletin: Engine Cylinder Head Bolt Torque Specifications

2005-08-01

Updates and revisions to the official engine cylinder head bolt torque specifications for the impreza engine.

2000-2007 impreza

Resolution: Revised torque specifications for cylinder head bolts: 25 Nm (18.4 ft-lb), 50 Nm (36.9 ft-lb), 75 Nm (55.3 ft-lb).

Technical Service Bulletin: Front Wheel Bearing Hub Nut Torque Specification

2003-12-15

Correction to the front wheel bearing hub nut torque specification for the impreza.

2002-2007 impreza

Resolution: Updated torque specification for front wheel bearing hub nut: 150 Nm (110.6 ft-lb).

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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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  • Always follow the manufacturer's recommended procedures and safety precautions.
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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.

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