Subaru Vehicle Models Subaru Impreza 2017-present Torque Specifications
Subaru Vehicle Models Subaru Impreza 2017-present

Subaru Vehicle Models Subaru Impreza 2017-present Torque Specifications

Complete Subaru Vehicle Models Subaru Impreza 2017-present torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.

Updated

Important Information

Safety guidelines and reference information for proper torque application

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

Common Torque Patterns

Star Pattern

Used for wheels and other circular bolt patterns

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

Used for gaskets and cover plates

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

Used for head bolts and other critical components

Sequential Pattern torque pattern diagram showing proper bolt tightening sequence

Common Mistakes to Avoid

Over-tightening

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

Prevention:

Always use a calibrated torque wrench and follow specifications exactly.

Incorrect Torque Sequence

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

Prevention:

Follow the manufacturer's specified torque sequence pattern.

Dirty Threads

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

Prevention:

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

Reusing TTY Bolts

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

Prevention:

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

Dry vs. Lubricated

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

Prevention:

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

Recommended Tools

Torque Wrench (1/4" Drive)

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

Torque Wrench (3/8" Drive)

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

Torque Wrench (1/2" Drive)

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

Angle Gauge

Torque-to-yield (TTY) bolts

Torque Wrench Care

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

Search Specifications

Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

2.0l H4 Engine

Torque specifications for 2.0L-H4 Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.25
Torque Specification
1. 23 ft-lbs (31 N·m) 2. 29 ft-lbs (39 N·m)
Important Notes
Follow the manufacturer's torque sequence for proper sealing.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
4 ft-lbs (5.4 N·m)
Important Notes
Ensure the valve cover gasket is properly seated before tightening.

Crankshaft And Bearings

1

Main Bearing Bolts

M10 x 1.25
Torque Specification
41 ft-lbs (55.6 N·m)
Important Notes
Follow the manufacturer's torque sequence for proper alignment.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
31.5 ft-lbs (42.7 N·m)
Important Notes
Ensure proper alignment of connecting rods before tightening.

Timing System

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
20 ft-lbs (27.1 N·m)
Important Notes
Ensure proper tension on the timing belt/chain before tightening.
2

Camshaft Sprocket Bolt

M12 x 1.25
Torque Specification
44.5 ft-lbs (60.3 N·m)
Important Notes
Ensure the camshaft is properly aligned before tightening.

Oil System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.
2

Oil Drain Plug Bolt

M14 x 1.5
Torque Specification
32.5 ft-lbs (44.1 N·m)
Important Notes
Replace the crush washer to ensure proper sealing.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Ensure the intake manifold gasket is properly seated before tightening.
2

Exhaust Manifold Bolts

M8 x 1.25
Torque Specification
35.5 ft-lbs (48.1 N·m)
Important Notes
Ensure the exhaust manifold gasket is properly seated before tightening.

Body

Torque specifications for Body

Suspension And Steering

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Ensure lug nuts are tightened in a star pattern to evenly distribute torque.
2

Strut/Shock Absorber Mounting Bolts

M10 x 1.25
Torque Specification
39 ft-lbs (53 N·m)
Important Notes
Estimated value based on similar components.
3

Control Arm Bolts

M12 x 1.75
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure proper alignment of the control arm before torquing.
4

Ball Joint Nut

M12 x 1.75
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure the ball joint is properly seated before torquing.
5

Tie Rod End Nut

M10 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure proper alignment of the tie rod end before torquing.
6

Sway Bar Link Nut

M8 x 1.25
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Estimated value based on similar components.
7

Steering Gear/Rack Bolts

M12 x 1.75
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure proper alignment of the steering rack before torquing.

Braking System

1

Brake Caliper Bolts

M10 x 1.25
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Ensure the caliper is properly aligned before torquing.
2

Brake Caliper Mounting Bracket Bolts

M12 x 1.75
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Ensure the bracket is properly aligned before torquing.
3

Brake Disc/Drum Retaining Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure the brake disc or drum is properly seated before torquing.

Body And Safety

1

Body Panel Bolts (e.g., fender, door hinges, hood, trunk)

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value based on similar components. Avoid over-tightening to prevent damage to panels.
2

Seat Belt Anchorage Bolts

M10 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Ensure the seat belt anchorage is properly aligned before torquing.
3

Subframe Mounting Bolts

M14 x 2.0
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Ensure the subframe is properly aligned before torquing. Follow the specified torque sequence.
4

Radiator Support Bolts

M8 x 1.25
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
Estimated value based on similar components. Avoid over-tightening to prevent damage to the radiator.
5

Bumper Reinforcement Bolts

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the bumper reinforcement is properly aligned before torquing.

Brakes

Torque specifications for Brakes

Brake Caliper

1

Brake Caliper Bolts

M10 x 1.25
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Torque value is an average of the provided range (25-29 ft-lbs / 34-39 Nm).
2

Brake Caliper Mounting Bracket Bolts

M12 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Torque value is an average of the provided range (74-85 ft-lbs / 100-115 Nm).

Brake Rotor

1

Brake Disc/Drum Retaining Bolts

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

Brake Hydraulics

1

Brake Hose Banjo Bolt

M10 x 1.0
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Torque value is an average of the provided range (16-20 ft-lbs / 22-27 Nm).
2

Brake Master Cylinder Mounting Bolts

M8 x 1.25
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
Torque value is an average of the provided range (10-15 ft-lbs / 14-20 Nm).
3

Brake Bleeder Valve

M8 x 1.25
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Torque value is an average of the provided range (7-10 ft-lbs / 9-14 Nm).

Brake Pedal

1

Brake Pedal Bracket Bolts

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

Wheel

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 provided range (74-85 ft-lbs / 100-115 Nm). Always use a star pattern for tightening.

Drivetrain

Torque specifications for Drivetrain

Engine Transmission Interface

1

Flywheel Bolts

M10 x 1.25
Torque Specification
57 ft-lbs (77 N·m)
Important Notes
Ensure the flywheel is properly aligned before tightening. Torque in a crisscross pattern.
2

Transmission Bellhousing Bolts

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

Transmission Mounting

1

Transmission Mounting Bolts

M10 x 1.25
Torque Specification
41 ft-lbs (56 N·m)
Important Notes
Ensure the transmission is properly aligned before tightening.

Drive Axles

1

Drive Axle/Half Shaft Bolts

M12 x 1.25
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Ensure the axle is properly seated before tightening.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
141 ft-lbs (191 N·m)
Important Notes
Ensure the CV joint is properly seated before tightening.

Driveshaft

1

Propeller/Drive Shaft Bolts

M10 x 1.25
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure the driveshaft is properly aligned before tightening. Torque in a crisscross pattern.

Transmission Fluid System

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening. Torque in a crisscross pattern.
2

Transmission Drain and Fill Plugs

M14 x 1.5
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Ensure the plugs are properly seated before tightening.

Differential

1

Differential Mounting Bolts

M10 x 1.25
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Ensure the differential is properly aligned before tightening. Torque in a crisscross pattern.
2

Differential Drain/Fill Plug

M14 x 1.5
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Ensure the plugs are properly seated before tightening.
3

Rear Differential Pinion Flange Nut

M24 x 1.5
Torque Specification
160 ft-lbs (217 N·m)
Important Notes
Ensure the pinion flange is properly seated before tightening.

Transfer Case

1

Transfer Case Mounting Bolts

M10 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Ensure the transfer case is properly aligned before tightening. Torque in a crisscross pattern.
2

Transfer Case Drain/Fill Plug

M14 x 1.5
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Ensure the plugs are properly seated before tightening.

Clutch System

1

Clutch Pressure Plate Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the pressure plate is properly aligned before tightening. Torque in a crisscross pattern.

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 properly seated before tightening.

Starting System

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
32 ft-lbs (44 N·m)
Important Notes
Ensure the starter motor is properly aligned with the flywheel before tightening.

Charging System

1

Alternator Mounting Bolts

M10 x 1.5
Torque Specification
32 ft-lbs (44 N·m)
Important Notes
Ensure the alternator is properly aligned with the drive belt before tightening.

Battery System

1

Battery Terminal Nuts

M6 x 1.0
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Ensure the battery terminals are clean and free of corrosion before tightening.

Ac System

1

A/C Compressor Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the A/C compressor is properly aligned with the drive belt before tightening.
2

A/C Line Fittings

M6 x 1.0
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Ensure the A/C line fittings are properly seated before tightening.

Grounding System

1

Grounding Point Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure the grounding points are clean and free of corrosion before tightening.

Ecu System

1

ECU Mounting Bolts

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

Fuse Box System

1

Fuse Box Mounting Bolts

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

Sensor System

1

Sensor Mounting Bolts (e.g., Oxygen Sensor, Crankshaft Position Sensor)

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

Wiring Harness System

1

Wiring Harness Clamp Bolts

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

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust Manifold Headers

1

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
35.5 ft-lbs (48 N·m)
Important Notes
Torque value is the midpoint of the provided range (32-39 ft-lbs).
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Torque value is the midpoint of the provided range (23-29 ft-lbs).

Exhaust Pipe Connections

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
35.5 ft-lbs (48 N·m)
Important Notes
Torque value is the midpoint of the provided range (32-39 ft-lbs).
2

Downpipe to Catalytic Converter Bolts

M8 x 1.25
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Torque value is the midpoint of the provided range (25-31 ft-lbs).

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Torque value is the midpoint of the provided range (25-31 ft-lbs).
2

Catalytic Converter Heat Shield 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).

Emissions Control Components

1

EGR Valve 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).
2

Oxygen Sensor (O2 Sensor) Mounting

M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Torque value is the midpoint of the estimated range (30-40 ft-lbs).
3

Secondary Air Injection System 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).

Exhaust

Torque specifications for Exhaust

Exhaust Manifold Headers

1

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.25
Torque Specification
32 ft-lbs (43 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
32 ft-lbs (43 N·m)
Important Notes
Ensure gasket is properly seated before tightening.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Estimated value based on similar M8 bolts in exhaust systems.

Muffler

1

Muffler to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Estimated value based on similar M8 bolts in exhaust systems.

Heat Shield

1

Exhaust Heat Shield Bolts

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

Exhaust Hanger

1

Exhaust Hanger Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Estimated value based on similar M8 bolts in hanger applications.

Oxygen Sensor

1

Oxygen Sensor (O2 Sensor) Mounting Bolts

M12 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Estimated value based on similar M12 bolts in oxygen sensor applications.

Exhaust Flange

1

Exhaust Flange Bolts

M10 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure.

Fuel

Torque specifications for Fuel

Fuel Delivery System

1

Fuel Rail Bolts

M6 x 1.0
Torque Specification
11.5 ft-lbs (15.6 N·m)
Important Notes
Torque value is an average of the provided range (10-13 ft-lbs / 14-18 Nm).
2

Fuel Injector Bolts

M5 x 0.8
Torque Specification
8 ft-lbs (10.8 N·m)
Important Notes
Torque value is an average of the provided range (7-9 ft-lbs / 9-12 Nm).
3

High-Pressure Fuel Line Fittings

M8 x 1.25
Torque Specification
20 ft-lbs (27.1 N·m)
Important Notes
Torque value is an average of the provided range (18-22 ft-lbs / 24-30 Nm).

Fuel Storage System

1

Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
25.5 ft-lbs (34.6 N·m)
Important Notes
Torque value is an average of the provided range (22-29 ft-lbs / 30-39 Nm).
2

Fuel Tank Strap Bolts

M8 x 1.25
Torque Specification
25.5 ft-lbs (34.6 N·m)
Important Notes
Torque value is an average of the provided range (22-29 ft-lbs / 30-39 Nm).
3

Fuel Filler Neck Bolts

M8 x 1.25
Torque Specification
25.5 ft-lbs (34.6 N·m)
Important Notes
Torque value is an average of the provided range (22-29 ft-lbs / 30-39 Nm).

Fuel Filtration System

1

Fuel Filter Bolt/Nut

M6 x 1.0
Torque Specification
20 ft-lbs (27.1 N·m)
Important Notes
Torque value is an average of the provided range (18-22 ft-lbs / 24-30 Nm).

Fuel Control System

1

Fuel Pressure Regulator Bolts

M5 x 0.8
Torque Specification
8 ft-lbs (10.8 N·m)
Important Notes
Torque value is an average of the provided range (7-9 ft-lbs / 9-12 Nm).
2

Fuel Tank Sender Unit Bolts

M5 x 0.8
Torque Specification
8 ft-lbs (10.8 N·m)
Important Notes
Torque value is an average of the provided range (7-9 ft-lbs / 9-12 Nm).

Fuel Line Management

1

Fuel Line Clamp Bolts

M4 x 0.7
Torque Specification
4 ft-lbs (5.4 N·m)
Important Notes
Torque value is an average of the provided range (3-5 ft-lbs / 4-7 Nm).

Hvac

Torque specifications for Hvac

A/C Compressor Mounting

1

A/C Compressor Mounting Bolts

M10 x 1.5
Torque Specification
22.5 ft-lbs (30.5 N·m)
Important Notes
Estimated average torque value from 20-25 ft-lbs (27-34 nm) range.

A/C Line Fittings

1

A/C Line Fittings

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Estimated average torque value from 12-16 ft-lbs (16-22 nm) range.

Evaporator Mounting

1

Evaporator Mounting Bolts

M8 x 1.25
Torque Specification
12 ft-lbs (16.3 N·m)
Important Notes
Estimated torque value. Consult vehicle manufacturer's specifications for correct value.

Condenser Mounting

1

Condenser Mounting Bolts

M10 x 1.5
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Estimated torque value. Consult vehicle manufacturer's specifications for correct value.

Refrigerant Valve Mounting

1

Refrigerant Valve Bolts

M6 x 1
Torque Specification
10 ft-lbs (13.6 N·m)
Important Notes
Estimated torque value. Consult vehicle manufacturer's specifications for correct value.

Heater Core Mounting

1

Heater Core Mounting Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (13.6 N·m)
Important Notes
Estimated torque value. Consult vehicle manufacturer's specifications for correct value.

Blower Motor Mounting

1

Blower Motor Mounting Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (13.6 N·m)
Important Notes
Estimated torque value. Consult vehicle manufacturer's specifications for correct value.

Suspension

Torque specifications for Suspension

Front Suspension

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
39 ft-lbs (53 N·m)
Important Notes
Torque value range: 35-43 ft-lbs (47-58 nm). Estimated average value used.
2

Control Arm Bolts

M16 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Torque value range: 61-69 ft-lbs (83-94 nm). Estimated average value used.
3

Ball Joint Nut

M18 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Torque value range: 61-69 ft-lbs (83-94 nm). Estimated average value used.
4

Tie Rod End Nut

M12 x 1.25
Torque Specification
34 ft-lbs (46 N·m)
Important Notes
Torque value range: 32-37 ft-lbs (43-50 nm). Estimated average value used.
5

Sway Bar Link Nut

M10 x 1.25
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Torque value range: 29-35 ft-lbs (39-47 nm). Estimated average value used.

Rear Suspension

1

Upper Control Arm Bushing Bolts

M12 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated torque value based on general industry standards.
2

Lower Control Arm Bushing Bolts

M12 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated torque value based on general industry standards.
3

Stabilizer Bar Mounting Bolts

M14 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated torque value based on general industry standards.
4

Coil Spring Mounting Bolts

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

Steering System

1

Steering Gear/Rack Bolts

M16 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Torque value range: 61-69 ft-lbs (83-94 nm). Estimated average value used.

Tr580 Transmission

Torque specifications for Tr580 Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M10 x 1.5
Torque Specification
41 ft-lbs (55.5 N·m)
Important Notes
Torque value is the midpoint of the specified range (37-45 ft-lbs).
2

Transmission Crossmember Bolts

M10 x 1.5
Torque Specification
41 ft-lbs (55.5 N·m)
Important Notes
Torque value is the midpoint of the specified range (37-45 ft-lbs).

Oil Pan

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Torque value is the midpoint of the specified range (6-8 ft-lbs).

Fluid Management

1

Transmission Drain and Fill Plugs

M14 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).
2

Transmission Cooler Line Fittings

M12 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Torque value is the midpoint of the specified range (12-16 ft-lbs).

Driveline Connection

1

Drive Axle/Half Shaft Bolts

M12 x 1.5
Torque Specification
55 ft-lbs (74.5 N·m)
Important Notes
Torque value is the midpoint of the specified range (51-59 ft-lbs).
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).
3

Propeller/Drive Shaft Bolts

M10 x 1.25
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Torque value is the midpoint of the specified range (61-69 ft-lbs).

Starter Motor

1

Starter Motor 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).

Bellhousing

1

Bellhousing Bolts

M10 x 1.5
Torque Specification
41 ft-lbs (55.5 N·m)
Important Notes
Torque value is the midpoint of the specified range (37-45 ft-lbs).

Shift Linkage

1

Shift Linkage Bolts

M6 x 1.0
Torque Specification
16 ft-lbs (21.5 N·m)
Important Notes
Torque value is the midpoint of the specified range (14-18 ft-lbs).

Torque Converter

1

Torque Converter 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).

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 cylinder head bolts on a 2019 Subaru Impreza 2.0L engine?

Refer to the Subaru service manual for specific torque values, typically around 76 ft-lbs (103 Nm) in three steps.

Q2

Can I use an impact wrench to tighten lug nuts on my Subaru Impreza?

No, it IS not recommended to use an impact wrench for tightening lug nuts. Use a calibrated torque wrench and follow the specified torque value.

Q3

How often should I check and torque my Subaru Impreza's suspension bolts?

Inspect and torque suspension bolts as per the maintenance schedule or after any major suspension work.

Q4

What IS the torque specification for the oil filter on a 2017 Subaru Impreza?

Tighten the oil filter to 18 ft-lbs (24 Nm).

Q5

Can I exceed the specified torque values when tightening bolts?

No, over-tightening bolts can lead to component damage or failure. Adhere to the specified torque values.

Q6

What precautions should I take when working with torque on my Subaru Impreza?

Ensure the vehicle IS properly supported and stabilized. Use clean, calibrated tools and apply torque smoothly and gradually.

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

Bolt Tightening Sequence for Engine Components

Technical procedure specific to Subaru impreza engines, covering proper bolt tightening sequence and torque specifications for cylinder head, oil pan, and other components.

  • Clean all mating surfaces and apply appropriate sealant or gasket.
  • Tighten bolts in the specified sequence and torque values.
  • Recheck torque after the engine has cooled down.
View full procedure

Suspension System Bolt Tightening

Procedure for tightening bolts on suspension components including control arms, ball joints, and sway bars, ensuring proper alignment and handling.

  • Support the vehicle securely and remove the wheels.
  • Clean all mating surfaces and apply anti-seize compound.
  • Tighten bolts to specified torque values in a star pattern.
View full procedure

Brake System Bolt Tightening

Safety-critical procedure covering torque specifications for brake calipers, rotors, and other components to ensure optimal braking performance.

  • Follow strict safety precautions when working on the brake system.
  • Clean and inspect all mating surfaces.
  • Tighten bolts to specified torque values using a torque wrench.
View full procedure
Technical Service Bulletins

Technical Service Bulletin: Revised Torque Specifications for Engine Head Bolts

2020-06-01

Updates torque specifications for engine head bolts on certain model years of the impreza, addressing potential issues with head gasket sealing.

2017-2019 impreza 2.0L

Resolution: Refer to the updated torque specifications provided in the bulletin and follow the recommended tightening sequence.

Technical Service Bulletin: Suspension Bolt Inspection and Tightening

2021-03-15

Addresses reports of loose suspension bolts on some impreza models, emphasizing the importance of regular inspection and proper tightening.

2018-2020 impreza AWD

Resolution: Inspect suspension bolts for tightness, clean threads, and apply anti-seize compound. Tighten bolts to specified torque values and recheck after 1,000 miles.

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Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
  • Vehicle specifications and procedures may vary by model year, trim level, and region.
  • Always follow the manufacturer's recommended procedures and safety precautions.
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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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