Subaru Vehicle Models Subaru Legacy 2015-2019 Torque Specifications
Subaru Vehicle Models Subaru Legacy 2015-2019

Subaru Vehicle Models Subaru Legacy 2015-2019 Torque Specifications

Complete Subaru Vehicle Models Subaru Legacy 2015-2019 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. 21 ft-lbs (28 N·m) 2. 90°
Important Notes
Follow the manufacturer's specified torque sequence for cylinder head bolts. Failure to do so may result in head gasket failure.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
3.7 ft-lbs (5 N·m)
Important Notes
Ensure the valve cover gasket is properly seated before tightening.

Crankshaft And Bearings

1

Main Bearing Bolts

M12 x 1.5
Torque Specification
54 ft-lbs (73 N·m)
Important Notes
Follow the manufacturer's specified torque sequence for main bearing bolts.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
39 ft-lbs (53 N·m)
Important Notes
Ensure connecting rod bearings are properly installed before tightening.
3

Flywheel Bolts

M10 x 1.25
Torque Specification
58 ft-lbs (78 N·m)
Important Notes
Use thread locker on flywheel bolts to prevent loosening.

Timing System

1

Camshaft Sprocket Bolt

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

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure proper tension on the timing belt or chain before tightening.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the intake manifold gasket is properly seated before tightening.
2

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Use new gaskets and ensure proper alignment before tightening.

Oil System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
3.7 ft-lbs (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
29 ft-lbs (39 N·m)
Important Notes
Replace the crush washer to ensure a proper seal.

3.6l H6 Engine

Torque specifications for 3.6L-H6 Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.25
Torque Specification
1. 21 ft-lbs (28 N·m) 2. 90°
Important Notes
Follow the specified torque sequence to ensure proper sealing and prevent warping.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
3.7 ft-lbs (5 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
54 ft-lbs (73 N·m)
Important Notes
Ensure proper alignment of the crankshaft before tightening.
2

Connecting Rod Nuts

M8 x 1.0
Torque Specification
39 ft-lbs (53 N·m)
Important Notes
Ensure proper alignment of the connecting rods before tightening.

Timing System

1

Camshaft Sprocket Bolt

M12 x 1.25
Torque Specification
58 ft-lbs (78 N·m)
Important Notes
Ensure proper alignment of the timing marks before tightening.
2

Timing Belt Tensioner Bolt

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure proper tension on the timing belt before tightening.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the intake manifold gasket is properly seated before tightening.
2

Exhaust Manifold Bolts

M8 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure the exhaust manifold gasket is properly seated before tightening.

Accessories

1

Starter Motor Mounting Bolts

M10 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure proper alignment of the starter motor before tightening.
2

Alternator Mounting Bolts

M10 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure proper belt tension before tightening.

Body

Torque specifications for Body

Suspension

1

Strut/Shock Absorber Mounting Bolts

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper alignment of the suspension system.
2

Control Arm Bolts

M12 x 1.75
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Ensure proper suspension geometry.
3

Ball Joint Nut

M14 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure safe steering and suspension operation.
4

Tie Rod End Nut

M10 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure precise steering control and alignment.
5

Sway Bar Link Nut

M10 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure stability during cornering.
6

Steering Gear/Rack Bolts

M14 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Ensure safe and accurate steering.

Wheels

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
88 ft-lbs (120 N·m)
Important Notes
Ensure the wheels remain securely attached.

Fuel System

1

Fuel Tank Strap Bolts

M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Prevent fuel leaks and ensure secure mounting.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Prevent fuel leaks and ensure a secure connection.

Electrical

1

Battery Terminal Nuts

M6 x 1.0
Torque Specification
3.6 ft-lbs (5 N·m)
Important Notes
Ensure a reliable electrical connection and prevent corrosion.

Body Panels

1

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

M6 x 1.0
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Estimated value. Ensure panels are securely attached without over-tightening.
2

Seat Mounting Bolts

M10 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value. Ensure passenger safety by preventing seat movement.
3

Roof Rack Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value. Ensure the rack remains securely attached without damaging the roof.
4

Door Hinge Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value. Ensure smooth operation and prevent misalignment.
5

Hood and Trunk Lid Hinge Bolts

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value. Ensure proper alignment and prevent rattling.
6

Rearview Mirror Mounting Bolts

M5 x 0.8
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Estimated value. Ensure the mirror remains securely attached.

Brakes

Torque specifications for Brakes

Brake Caliper

1

Brake Caliper Bolts

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

Brake Caliper Mounting Bracket Bolts

M12 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure the bracket is properly aligned with the steering knuckle or axle.
3

Brake Hose Banjo Bolt

M10 x 1.0
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the sealing washers are in good condition and properly seated.
4

Brake Bleeder Screw

M8 x 1.25
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Avoid over-tightening to prevent damage to the screw or caliper.

Brake Rotor

1

Brake Disc/Drum Retaining Bolts

M8 x 1.25
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Ensure the rotor is properly seated on the hub before tightening.

Brake Master Cylinder

1

Brake Master Cylinder Mounting Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure the master cylinder is properly aligned with the brake booster.

Brake Booster

1

Brake Booster Mounting Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure the booster is properly aligned with the firewall.

Parking Brake

1

Parking Brake Cable Bracket Bolts

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

Wheel

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
88 ft-lbs (120 N·m)
Important Notes
Always use a star pattern when tightening lug nuts.

Drivetrain

Torque specifications for Drivetrain

Engine

1

Flywheel Bolts

M12 x 1.5
Torque Specification
58 ft-lbs (78 N·m)
2

Crankshaft Position Sensor Bolt

M8 x 1.25
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value, consult the vehicle's service manual for specific torque values.
3

Camshaft Position Sensor Bolt

M8 x 1.25
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value, consult the vehicle's service manual for specific torque values.

Transmission

1

Transmission Mounting Bolts

M14 x 1.5
Torque Specification
44 ft-lbs (60 N·m)
2

Transmission Oil Pan Bolts

M10 x 1.25
Torque Specification
44 in-lbs (5 N·m)
3

Transmission Cooler Line Fittings

M12 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value, consult the vehicle's service manual for specific torque values.

Drivetrain

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
2

CV Joint/Axle Nut

M20 x 1.5
Torque Specification
147 ft-lbs (200 N·m)
3

Propeller/Drive Shaft Bolts

M12 x 1.5
Torque Specification
27 ft-lbs (37 N·m)
4

Differential Drain/Fill Plug

M14 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
5

Transfer Case Drain/Fill Plug

M14 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
6

Drive Axle/Half Shaft Nut (for vehicles with a center bearing)

M20 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Estimated value, consult the vehicle's service manual for specific torque values.

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Bolt

M6 x 1.0
Torque Specification
8.7 ft-lbs (12 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
29 ft-lbs (39 N·m)
Important Notes
Ensure the starter motor is properly aligned with the flywheel.

Charging System

1

Alternator Mounting Bolts

M10 x 1.5
Torque Specification
29 ft-lbs (39 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
3.6 ft-lbs (5 N·m)
Important Notes
Avoid over-tightening to prevent damage to the battery terminals.

A C System

1

A/C Compressor Mounting Bolts

M10 x 1.5
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure proper belt tension after tightening the compressor bolts.
2

A/C Line Fittings

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the fittings are clean and free of debris before tightening.

Grounding System

1

Ground Strap Bolts

M6 x 1.0
Torque Specification
7.2 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar grounding components.

Electrical Control System

1

Fuse Box Mounting Bolts

M6 x 1.0
Torque Specification
7.2 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar electrical components.
2

ECU Mounting Bolts

M6 x 1.0
Torque Specification
7.2 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar electrical components.

Sensor System

1

Crankshaft Position Sensor Mounting Bolt

M6 x 1.0
Torque Specification
7.2 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar sensor components.
2

Camshaft Position Sensor Mounting Bolt

M6 x 1.0
Torque Specification
7.2 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar sensor components.

Wiring System

1

Wiring Harness Clamp Bolts

M6 x 1.0
Torque Specification
7.2 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar wiring components.

Emissions Sensors

Torque specifications for Emissions_sensors

Egr System

1

EGR Valve Bolts

M8 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Ensure the EGR valve is properly aligned before tightening.

Exhaust Manifold

1

Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Follow the manufacturer's torque sequence to ensure even clamping force.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
21 ft-lbs (28 N·m)
Important Notes
Ensure the exhaust manifold is properly aligned before tightening.

Exhaust Pipe

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Use new gaskets to ensure a proper seal.
2

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure the catalytic converter is properly aligned before tightening.

Emissions Sensors

1

Oxygen Sensor (Lambda Sensor)

M18 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Estimated value based on typical Subaru models. Ensure the sensor is properly threaded to avoid cross-threading.
2

Air Fuel Ratio (AFR) Sensor

M18 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Estimated value based on typical Subaru models. Ensure the sensor is properly aligned before tightening.
3

Exhaust Gas Temperature (EGT) Sensor

M12 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on typical Subaru models. Ensure the sensor is properly threaded to avoid cross-threading.

Heat Shields

1

Catalytic Converter Heat Shield Bolts

M6 x 1.0
Torque Specification
7.2 ft-lbs (10 N·m)
Important Notes
Estimated value based on typical Subaru models. Ensure the heat shield is properly aligned before tightening.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold

1

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.25
Torque Specification
21 ft-lbs (28 N·m)
Important Notes
Ensure proper tightening sequence to avoid warping the manifold.
2

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure gasket is properly seated before tightening.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Use a new gasket to ensure a proper seal.

Muffler

1

Muffler to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure proper alignment before tightening.
2

Exhaust Flange Bolts

M10 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure flanges are properly aligned before tightening.

Heat Shield

1

Exhaust Heat Shield Bolts

M6 x 1.0
Torque Specification
7.2 ft-lbs (10 N·m)
Important Notes
Estimated value based on common heat shield bolt sizes.

Oxygen Sensor

1

Oxygen Sensor (O2 Sensor) Mounting

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

Exhaust Hanger

1

Exhaust Hanger Bolts/Nuts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on common exhaust hanger bolt sizes.

Fuel

Torque specifications for Fuel

Fuel Rail System

1

Fuel Rail Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure the fuel rail is properly seated before torquing.
2

Fuel Injector Bolts

M6 x 1.0
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Ensure injectors are properly seated before torquing.
3

Fuel Injector Rail Bolts

M6 x 1.0
Torque Specification
7.42 ft-lbs (10 N·m)
Important Notes
Converted from inch-lbs to ft-lbs and N·m. Ensure the rail is stable before torquing.

Fuel Delivery System

1

Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the fuel pump is properly aligned before torquing.
2

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the fuel tank is properly positioned before torquing.
3

Fuel Filler Neck Bolts

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Ensure the filler neck is properly seated before torquing.
4

Fuel Filter Bolt/Nut

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the fuel filter housing is properly seated before torquing.

Fuel Emissions System

1

Fuel Pressure Regulator Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value based on similar components. Ensure the regulator is properly seated before torquing.
2

Fuel Vapor Canister Mounting Bolts

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on similar components. Ensure the canister is properly seated before torquing.

Fuel Tank System

1

Fuel Tank Sender Unit Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Estimated value based on similar components. Ensure the sender unit is properly seated before torquing.
2

Fuel Line Fittings

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Estimated value based on similar components. Ensure the fittings are properly seated before torquing.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M10 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure the compressor is properly aligned before tightening. Use a crisscross pattern for even torque distribution.

Refrigerant Lines

1

A/C Line Fittings

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Use a torque wrench to avoid overtightening, which can damage the fittings.

Evaporator Housing

1

Evaporator Core Housing Bolts

M6 x 1.0
Torque Specification
7.2 ft-lbs (10 N·m)
Important Notes
Estimated value based on typical HVAC housing bolts. Ensure the housing is properly sealed to prevent refrigerant leaks.

Blower Motor

1

Blower Motor Mounting Bolts

M6 x 1.0
Torque Specification
7.2 ft-lbs (10 N·m)
Important Notes
Estimated value based on typical blower motor mounting bolts. Ensure the motor is securely mounted to prevent vibrations.

Heater Core

1

Heater Core Inlet/Outlet Fittings

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value based on typical heater core fittings. Ensure a leak-free connection to maintain coolant flow.

Hvac Case

1

HVAC Case Assembly Bolts

M6 x 1.0
Torque Specification
7.2 ft-lbs (10 N·m)
Important Notes
Estimated value based on typical HVAC case bolts. Use a crisscross pattern for even torque distribution.

Suspension

Torque specifications for Suspension

Strut Shock Absorber

1

Upper Strut Mounting Bolts

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the strut is properly aligned before torquing.
2

Lower Strut Mounting Bolts

M12 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Ensure the steering knuckle or lower control arm is properly aligned.

Control Arms

1

Control Arm Bolts

M12 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Ensure the control arm is properly aligned with the chassis and suspension components.
2

Ball Joint Nut

M14 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure the ball joint is properly seated in the steering knuckle.

Steering Components

1

Tie Rod End Nut

M12 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure the tie rod end is properly seated in the steering knuckle.
2

Sway Bar Link Nut

M10 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure the sway bar link is properly aligned with the sway bar and suspension components.
3

Steering Gear/Rack Bolts

M14 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Ensure the steering rack is properly aligned with the chassis.

Drivetrain

1

Drive Axle/Half Shaft Bolts

M12 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Ensure the drive axle is properly seated in the wheel hub and transmission.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
147 ft-lbs (200 N·m)
Important Notes
Ensure the CV joint is properly seated in the wheel hub.
3

Front Hub Carrier Bolts

M12 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure the hub carrier is properly aligned with the suspension components.
4

Rear Hub Carrier Bolts

M12 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure the hub carrier is properly aligned with the suspension components.

Subframe

1

Subframe Mounting Bolts

M14 x 1.5
Torque Specification
1. 40 ft-lbs (54 N·m) 2. 80 ft-lbs (108 N·m)
Important Notes
Follow the specified torque sequence to ensure even clamping force.
2

Rear Suspension Crossmember Bolts

M14 x 1.5
Torque Specification
1. 40 ft-lbs (54 N·m) 2. 80 ft-lbs (108 N·m)
Important Notes
Follow the specified torque sequence to ensure even clamping force.

Trailing Arms

1

Trailing Arm Bolts

M12 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Ensure the trailing arm is properly aligned with the chassis and suspension components.

Tr580 Transmission

Torque specifications for Tr580 Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M10 x 1.25
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Ensure proper alignment of the transmission before tightening.
2

Transmission Crossmember Bolts

M12 x 1.75
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Estimated value based on similar crossmember bolts.

Oil Pan

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
3.7 ft-lbs (5 N·m)
Important Notes
Use a crisscross pattern to avoid warping the oil pan.

Fluid Management

1

Transmission Drain Plug

M14 x 1.5
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Ensure the plug is properly seated before tightening.
2

Transmission Fill Plug

M14 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure the plug is properly seated before tightening.
3

Transmission Cooler Line Fittings

M12 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value based on similar cooler line fittings.

Drivetrain Connections

1

Drive Axle/Half Shaft Bolts

M10 x 1.25
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Ensure proper alignment of the drive axles before tightening.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
147 ft-lbs (200 N·m)
Important Notes
Use a torque wrench with a high-capacity range.
3

Propeller/Drive Shaft Bolts

M8 x 1.25
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Ensure proper alignment of the drive shaft before tightening.

Starter Motor

1

Starter Motor Mounting Bolts

M8 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure proper alignment of the starter motor before tightening.

Torque Converter

1

Torque Converter Bolts

M8 x 1.25
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Ensure proper alignment of the torque converter before tightening.

Shift Linkage

1

Shift Linkage Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper alignment of the shift linkage before tightening.

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 specification for the lug nuts on a 2015-2019 Subaru Legacy?

Tighten the lug nuts to 103 lb-ft (140 Nm) using a torque wrench. Refer to your vehicle's owner's manual for specific guidelines.

Q2

How do I properly torque the spark plugs on my 2018 Subaru Legacy?

Clean the spark plug threads and apply anti-seize compound. Install the spark plugs by hand and then tighten them using a torque wrench to 22 lb-ft (30 Nm).

Q3

What type of torque wrench should I use for my 2015 Subaru Legacy?

Use a high-quality torque wrench that IS calibrated to accurately measure torque within the specified range for your vehicle. Consult your vehicle's service manual for specific torque values.

Q4

Can I over-tighten bolts on my 2019 Subaru Legacy?

Yes, over-tightening bolts can strip threads, damage components, and potentially cause safety hazards. Always follow the specified torque specifications and use a calibrated torque wrench to avoid over-tightening.

Q5

What IS the torque specification for the oil drain plug on a 2017 Subaru Legacy?

Tighten the oil drain plug to 29 lb-ft (40 Nm).

Q6

How often should I check the torque on critical bolts on my 2016 Subaru Legacy?

Refer to your vehicle's maintenance schedule for recommended torque checks. Critical bolts, such as those on suspension components and engine mounts, should be checked periodically or after major repairs.

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
Service Procedures

Suspension Component Tightening Sequence and Torque Specifications

Proper tightening sequence and torque values for suspension components on the Legacy.

  • Tighten the lower control arm bolts to 105 Nm (77 ft-lb).
  • Tighten the upper control arm bolts to 105 Nm (77 ft-lb).
  • Tighten the ball joint nuts to 35 Nm (26 ft-lb).
  • Tighten the stabilizer bar bolts to 15 Nm (11 ft-lb).
View full procedure

Engine Mounting Bolts Tightening Torque Specifications

Tightening torque values for engine mounting bolts on the Legacy.

  • Tighten the front engine mount bolts to 60 Nm (44 ft-lb).
  • Tighten the rear engine mount bolts to 50 Nm (37 ft-lb).
  • Tighten the side engine mount bolts to 40 Nm (30 ft-lb).
View full procedure
Technical Service Bulletins

Technical Service Bulletin: Revised Torque Specifications for Wheel Lug Nuts

2018-03-15

Updated torque specifications for wheel lug nuts on the Legacy. Previous specifications may have resulted in loose nuts.

2015-2019 Legacy

Resolution: Tighten the wheel lug nuts to 115 Nm (85 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.
  • 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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