Lexus Vehicle Models IS 2006-2013 Torque Specifications
Lexus Vehicle Models IS 2006-2013

Lexus Vehicle Models IS 2006-2013 Torque Specifications

Complete Lexus Vehicle Models IS 2006-2013 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 Engine

Torque specifications for 2.5L Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 28 ft-lbs (38 N·m) 2. 90°
Important Notes
Follow the manufacturer's specified torque sequence to ensure even clamping force.
2

Valve Cover Bolts

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

Crankshaft And Connecting Rods

1

Main Bearing Bolts

M10 x 1.25
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Follow the specified torque sequence to ensure proper crankshaft alignment.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
29 ft-lbs (39.3 N·m)
Important Notes
Ensure the connecting rod bearings are properly seated before tightening.

Timing System

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
21 ft-lbs (28.5 N·m)
Important Notes
Ensure the tensioner is properly aligned before tightening.
2

Camshaft Sprocket Bolt

M12 x 1.5
Torque Specification
57 ft-lbs (77.3 N·m)
Important Notes
Ensure the camshaft is properly aligned before tightening.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (21.7 N·m)
Important Notes
Follow the specified torque sequence to ensure even clamping force.
2

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Ensure the exhaust manifold gasket is properly seated before tightening.

Oil System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8.1 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
30 ft-lbs (40.7 N·m)
Important Notes
Ensure the drain plug washer is in good condition before tightening.

2.5l V6 Engine

Torque specifications for 2.5L-V6 Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 28 ft-lbs (38 N·m) 2. 90°
Important Notes
Follow the manufacturer's specified torque sequence to ensure even clamping force.
2

Valve Cover Bolts

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

Crankshaft And Connecting Rods

1

Main Bearing Bolts

M10 x 1.25
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Follow the specified torque sequence to ensure proper crankshaft alignment.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
29 ft-lbs (39.3 N·m)
Important Notes
Ensure the connecting rod bearings are properly seated before tightening.

Timing System

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
21 ft-lbs (28.5 N·m)
Important Notes
Ensure the tensioner is properly aligned before tightening.
2

Camshaft Sprocket Bolt

M12 x 1.5
Torque Specification
57 ft-lbs (77.3 N·m)
Important Notes
Ensure the camshaft is properly aligned before tightening.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (21.7 N·m)
Important Notes
Follow the specified torque sequence to ensure even clamping force.
2

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Ensure the exhaust manifold gasket is properly seated before tightening.

Oil System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8.1 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
30 ft-lbs (40.7 N·m)
Important Notes
Ensure the drain plug washer is in good condition before tightening.

3.5l Engine

Torque specifications for 3.5L Engine

Cylinder Head and Valvetrain

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
2

Valve Cover Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (9.5 N·m)
3

Rocker Arms/Shafts Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (24.4 N·m)

Engine Block and Crankshaft

1

Main Bearing Bolts

M14 x 2.0
Torque Specification
30 ft-lbs (40.7 N·m)
2

Connecting Rod Nuts

M12 x 1.75
Torque Specification
29 ft-lbs (39.3 N·m)
3

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 2.0
Torque Specification
174 ft-lbs (235.9 N·m)

Timing System

1

Timing Belt/Chain Tensioner Bolt

M10 x 1.5
Torque Specification
21 ft-lbs (28.5 N·m)
2

Camshaft Sprocket Bolt

M12 x 1.75
Torque Specification
57 ft-lbs (77.3 N·m)

Intake and Exhaust System

1

Intake Manifold Bolts

M10 x 1.5
Torque Specification
16 ft-lbs (21.7 N·m)
2

Exhaust Manifold/Headers Bolts

M12 x 1.75
Torque Specification
30 ft-lbs (40.7 N·m)

Engine Accessories

1

Water Pump Bolts

M8 x 1.25
Torque Specification
80 in-lbs (9 N·m)
Important Notes
Estimated value, may vary depending on the specific engine and application.
2

Thermostat Housing Bolts

M8 x 1.25
Torque Specification
80 in-lbs (9 N·m)
Important Notes
Estimated value, may vary depending on the specific engine and application.

Engine Mounts and Sensors

1

Engine Mounting Bolts

M14 x 2.0
Torque Specification
40 ft-lbs (54.2 N·m)
Important Notes
Estimated value, may vary depending on the specific engine and application.
2

Crankshaft Position Sensor Bolt

M8 x 1.25
Torque Specification
10 ft-lbs (13.6 N·m)
Important Notes
Estimated value, may vary depending on the specific engine and application.

3.5l V6 Engine

Torque specifications for 3.5L-V6 Engine

Cylinder Head and Valvetrain

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
2

Valve Cover Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (9.5 N·m)
3

Rocker Arms/Shafts Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (24.4 N·m)

Engine Block and Crankshaft

1

Main Bearing Bolts

M14 x 2.0
Torque Specification
30 ft-lbs (40.7 N·m)
2

Connecting Rod Nuts

M12 x 1.75
Torque Specification
29 ft-lbs (39.3 N·m)
3

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 2.0
Torque Specification
174 ft-lbs (235.9 N·m)

Timing System

1

Timing Belt/Chain Tensioner Bolt

M10 x 1.5
Torque Specification
21 ft-lbs (28.5 N·m)
2

Camshaft Sprocket Bolt

M12 x 1.75
Torque Specification
57 ft-lbs (77.3 N·m)

Intake and Exhaust System

1

Intake Manifold Bolts

M10 x 1.5
Torque Specification
16 ft-lbs (21.7 N·m)
2

Exhaust Manifold/Headers Bolts

M12 x 1.75
Torque Specification
30 ft-lbs (40.7 N·m)

Engine Accessories

1

Water Pump Bolts

M8 x 1.25
Torque Specification
80 in-lbs (9 N·m)
Important Notes
Estimated value, may vary depending on the specific engine and application.
2

Thermostat Housing Bolts

M8 x 1.25
Torque Specification
80 in-lbs (9 N·m)
Important Notes
Estimated value, may vary depending on the specific engine and application.

Engine Mounts and Sensors

1

Engine Mounting Bolts

M14 x 2.0
Torque Specification
40 ft-lbs (54.2 N·m)
Important Notes
Estimated value, may vary depending on the specific engine and application.
2

Crankshaft Position Sensor Bolt

M8 x 1.25
Torque Specification
10 ft-lbs (13.6 N·m)
Important Notes
Estimated value, may vary depending on the specific engine and application.

5.0l Engine

Torque specifications for 5.0L Engine

Cylinder Head and Engine Block

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
2

Cylinder Head to Engine Block Studs

M14 x 1.5
Torque Specification
60 ft-lbs (81.4 N·m)
Important Notes
Estimated value based on similar components.

Main Bearings and Crankshaft

1

Main Bearing Bolts

M16 x 1.5
Torque Specification
30 ft-lbs (40.7 N·m)
2

Main Bearing Cap Bolts

M14 x 1.5
Torque Specification
40 ft-lbs (54.2 N·m)
Important Notes
Estimated value based on similar components.

Connecting Rods and Pistons

1

Connecting Rod Nuts

M12 x 1.5
Torque Specification
29 ft-lbs (39.3 N·m)
2

Connecting Rod Bearing Cap Bolts

M10 x 1.5
Torque Specification
20 ft-lbs (27.1 N·m)
Important Notes
Estimated value based on similar components.

Flywheel and Transmission

1

Flywheel Bolts

M14 x 1.5
Torque Specification
52 ft-lbs (70.4 N·m)

Oil Pan and Engine Mounts

1

Oil Pan Bolts

M10 x 1.5
Torque Specification
6 ft-lbs (8.1 N·m)
2

Engine Block to Transmission Mounting Bolts

M14 x 1.5
Torque Specification
40 ft-lbs (54.2 N·m)
Important Notes
Estimated value based on similar components.
3

Engine Block to Engine Mounting Bolts

M14 x 1.5
Torque Specification
40 ft-lbs (54.2 N·m)
Important Notes
Estimated value based on similar components.

Valve Train and Intake Manifold

1

Valve Cover Bolts

M10 x 1.5
Torque Specification
7 ft-lbs (9.5 N·m)
2

Intake Manifold Bolts

M12 x 1.5
Torque Specification
16 ft-lbs (21.7 N·m)

Exhaust System

1

Exhaust Manifold/Headers Bolts

M12 x 1.5
Torque Specification
30 ft-lbs (40.7 N·m)
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.5
Torque Specification
28 ft-lbs (38 N·m)

Ignition and Fuel Systems

1

Spark Plugs

M14 x 1.25
Torque Specification
13 ft-lbs (17.6 N·m)
2

Fuel Injector Bolts

M10 x 1.5
Torque Specification
14 ft-lbs (19 N·m)
3

Fuel Rail Bolts

M12 x 1.5
Torque Specification
17 ft-lbs (23 N·m)

Cooling System

1

Water Pump Bolts

M12 x 1.5
Torque Specification
80 ft-lbs (9 N·m)
Important Notes
Note: Value is in inch-lbs, not ft-lbs.
2

Water Pump Pulley Bolts

M10 x 1.5
Torque Specification
80 ft-lbs (9 N·m)
Important Notes
Note: Value is in inch-lbs, not ft-lbs.
3

Thermostat Housing Bolts

M10 x 1.5
Torque Specification
80 ft-lbs (9 N·m)
Important Notes
Note: Value is in inch-lbs, not ft-lbs.

5.0l V8 Engine

Torque specifications for 5.0L-V8 Engine

Cylinder Head and Engine Block

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
2

Cylinder Head to Engine Block Studs

M14 x 1.5
Torque Specification
60 ft-lbs (81.4 N·m)
Important Notes
Estimated value based on similar components.

Main Bearings and Crankshaft

1

Main Bearing Bolts

M16 x 1.5
Torque Specification
30 ft-lbs (40.7 N·m)
2

Main Bearing Cap Bolts

M14 x 1.5
Torque Specification
40 ft-lbs (54.2 N·m)
Important Notes
Estimated value based on similar components.

Connecting Rods and Pistons

1

Connecting Rod Nuts

M12 x 1.5
Torque Specification
29 ft-lbs (39.3 N·m)
2

Connecting Rod Bearing Cap Bolts

M10 x 1.5
Torque Specification
20 ft-lbs (27.1 N·m)
Important Notes
Estimated value based on similar components.

Flywheel and Transmission

1

Flywheel Bolts

M14 x 1.5
Torque Specification
52 ft-lbs (70.4 N·m)

Oil Pan and Engine Mounts

1

Oil Pan Bolts

M10 x 1.5
Torque Specification
6 ft-lbs (8.1 N·m)
2

Engine Block to Transmission Mounting Bolts

M14 x 1.5
Torque Specification
40 ft-lbs (54.2 N·m)
Important Notes
Estimated value based on similar components.
3

Engine Block to Engine Mounting Bolts

M14 x 1.5
Torque Specification
40 ft-lbs (54.2 N·m)
Important Notes
Estimated value based on similar components.

Valve Train and Intake Manifold

1

Valve Cover Bolts

M10 x 1.5
Torque Specification
7 ft-lbs (9.5 N·m)
2

Intake Manifold Bolts

M12 x 1.5
Torque Specification
16 ft-lbs (21.7 N·m)

Exhaust System

1

Exhaust Manifold/Headers Bolts

M12 x 1.5
Torque Specification
30 ft-lbs (40.7 N·m)
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.5
Torque Specification
28 ft-lbs (38 N·m)

Ignition and Fuel Systems

1

Spark Plugs

M14 x 1.25
Torque Specification
13 ft-lbs (17.6 N·m)
2

Fuel Injector Bolts

M10 x 1.5
Torque Specification
14 ft-lbs (19 N·m)
3

Fuel Rail Bolts

M12 x 1.5
Torque Specification
17 ft-lbs (23 N·m)

Cooling System

1

Water Pump Bolts

M12 x 1.5
Torque Specification
80 ft-lbs (9 N·m)
Important Notes
Note: Value is in inch-lbs, not ft-lbs.
2

Water Pump Pulley Bolts

M10 x 1.5
Torque Specification
80 ft-lbs (9 N·m)
Important Notes
Note: Value is in inch-lbs, not ft-lbs.
3

Thermostat Housing Bolts

M10 x 1.5
Torque Specification
80 ft-lbs (9 N·m)
Important Notes
Note: Value is in inch-lbs, not ft-lbs.

A760 Transmission

Torque specifications for A760 Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
40 ft-lbs (54.2 N·m)

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M8 x 1.25
Torque Specification
6 ft-lbs (8.1 N·m)

Transmission Fluid System

1

Transmission Drain and Fill Plugs

M12 x 1.5
Torque Specification
29 ft-lbs (39.3 N·m)
2

Transmission Fluid Drain/Fill Plug

M12 x 1.5
Torque Specification
29 ft-lbs (39.3 N·m)

A760 Transmission Case

1

A760 Transmission Case Bolts

M10 x 1.5
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Estimated value based on bolt size and material.

A760 Transmission Bellhousing

1

A760 Transmission Bellhousing Bolts

M12 x 1.75
Torque Specification
50 ft-lbs (67.8 N·m)
Important Notes
Estimated value based on bolt size and material.

A760 Transmission Pan Gasket

1

A760 Transmission Pan Gasket Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (13.6 N·m)
Important Notes
Estimated value based on bolt size and material.

A760 Transmission Filter

1

A760 Transmission Filter Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (10.8 N·m)
Important Notes
Estimated value based on bolt size and material.

Body

Torque specifications for Body

Suspension System

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
108 ft-lbs (146.5 N·m)
Important Notes
Secure the strut/shock absorber to the vehicle's body.
2

Control Arm Bolts

M12 x 1.25
Torque Specification
85 ft-lbs (115.2 N·m)
Important Notes
Attach the control arms to the vehicle's body.
3

Ball Joint Nut

M16 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Secure the ball joint to the control arm.
4

Tie Rod End Nut

M14 x 1.25
Torque Specification
36 ft-lbs (48.9 N·m)
Important Notes
Attach the tie rod end to the steering gear.
5

Sway Bar Link Nut

M12 x 1.25
Torque Specification
37 ft-lbs (50.1 N·m)
Important Notes
Secure the sway bar link to the sway bar.

Steering System

1

Steering Gear/Rack Bolts

M14 x 1.5
Torque Specification
85 ft-lbs (115.2 N·m)
Important Notes
Attach the steering gear/rack to the vehicle's body.

Body Mounts

1

Body Mount Bolts

M12 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value. Secure the vehicle's body to the frame.

Door Hinges

1

Door Hinge Bolts

M10 x 1.25
Torque Specification
25 ft-lbs (33.9 N·m)
Important Notes
Estimated value. Attach the doors to the vehicle's body.

Hood Hinges

1

Hood Hinge Bolts

M10 x 1.25
Torque Specification
25 ft-lbs (33.9 N·m)
Important Notes
Estimated value. Attach the hood to the vehicle's body.

Trunk Lid Hinges

1

Trunk Lid Hinge Bolts

M10 x 1.25
Torque Specification
25 ft-lbs (33.9 N·m)
Important Notes
Estimated value. Attach the trunk lid to the vehicle's body.

Brakes

Torque specifications for Brakes

Brake Caliper System

1

Brake Caliper Bolts

M10 x 1.25
Torque Specification
20 ft-lbs (27.1 N·m)
Important Notes
Ensure the caliper is properly aligned before torquing. Estimated bolt size based on typical caliper bolt dimensions.
2

Brake Caliper Mounting Bracket Bolts

M12 x 1.5
Torque Specification
74 ft-lbs (100.3 N·m)
Important Notes
Ensure the mounting bracket is securely attached to the chassis. Estimated bolt size based on typical bracket bolt dimensions.

Brake Disc Drum System

1

Brake Disc/Drum Retaining Bolts

M8 x 1.25
Torque Specification
21 ft-lbs (28.5 N·m)
Important Notes
Ensure the brake disc or drum is properly seated on the wheel hub before torquing. Estimated bolt size based on typical retaining bolt dimensions.

Wheel Attachment System

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
80 ft-lbs (108.5 N·m)
Important Notes
Ensure the wheel is properly seated on the hub before torquing. Estimated bolt size based on typical lug nut dimensions.

Brake Pedal System

1

Brake Pedal Assembly Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (33.9 N·m)
Important Notes
Ensure the brake pedal assembly is properly aligned before torquing. Estimated bolt size based on typical pedal assembly bolt dimensions.

Brake Hydraulic System

1

Brake Line Fittings (Brake Hose to Caliper)

M10 x 1.0
Torque Specification
15 ft-lbs (20.3 N·m)
Important Notes
Ensure the brake hose is properly connected to the caliper before torquing. Estimated bolt size based on typical brake line fitting dimensions.
2

Brake Master Cylinder Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24.4 N·m)
Important Notes
Ensure the master cylinder is properly aligned before torquing. Estimated bolt size based on typical master cylinder bolt dimensions.

Drivetrain

Torque specifications for Drivetrain

Engine and Flywheel

1

Flywheel Bolts

M12 x 1.5
Torque Specification
52 ft-lbs (70.4 N·m)
Important Notes
Proper torque ensures the flywheel is properly seated and the engine's rotational energy is transferred to the transmission.

Transmission and Mounting

1

Transmission Mounting Bolts

M14 x 1.5
Torque Specification
40 ft-lbs (54.2 N·m)
Important Notes
Proper torque ensures the transmission is properly aligned and supported.
2

Transmission Crossmember Bolts

M16 x 1.5
Torque Specification
1. 60 ft-lbs (81 N·m) 2. 80 ft-lbs (108 N·m)
Important Notes
Estimated torque value range. Proper torque ensures the transmission is properly supported and aligned.

Transmission Oil Pan and Case

1

Transmission Oil Pan Bolts

M10 x 1.5
Torque Specification
6 ft-lbs (8.1 N·m)
Important Notes
Proper torque ensures the oil pan is properly sealed and the transmission's lubrication system is maintained.

Drivetrain and Axles

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Specification
58 ft-lbs (78.7 N·m)
Important Notes
Proper torque ensures the axles are properly seated and the drivetrain's rotational energy is transferred to the wheels.
2

CV Joint/Axle Nut

M20 x 1.5
Torque Specification
159 ft-lbs (215.5 N·m)
Important Notes
Proper torque ensures the CV joint is properly seated and the drivetrain's rotational energy is transferred to the wheels.
3

Axle Shaft Retaining Bolts

M12 x 1.5
Torque Specification
1. 40 ft-lbs (54 N·m) 2. 50 ft-lbs (68 N·m)
Important Notes
Estimated torque value range. Proper torque ensures the axle shafts are properly seated and the drivetrain's rotational energy is transferred to the wheels.

Differential and Propeller Shaft

1

Differential Cover Bolts

M12 x 1.5
Torque Specification
1. 30 ft-lbs (40 N·m) 2. 40 ft-lbs (54 N·m)
Important Notes
Estimated torque value range. Proper torque ensures the differential cover is properly sealed and the differential's lubrication system is maintained.
2

Propeller/Drive Shaft Bolts

M14 x 1.5
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Proper torque ensures the propeller shaft is properly seated and the drivetrain's rotational energy is transferred to the wheels.

Differential and Transfer Case Drain/Fill Plugs

1

Differential Drain/Fill Plug

M12 x 1.5
Torque Specification
29 ft-lbs (39.3 N·m)
Important Notes
Proper torque ensures the plug is properly sealed and the differential's lubrication system is maintained.
2

Transfer Case Drain/Fill Plug

M12 x 1.5
Torque Specification
29 ft-lbs (39.3 N·m)
Important Notes
Proper torque ensures the plug is properly sealed and the transfer case's lubrication system is maintained.

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Bolt

M6 x 1.0
Torque Specification
5 ft-lbs (6.8 N·m)
Important Notes
Ensure the ignition coil is properly seated before tightening.

Battery System

1

Battery Terminal Nuts

M8 x 1.25
Torque Specification
4 ft-lbs (5.4 N·m)
Important Notes
Ensure the terminals are clean and free of corrosion before tightening.

Starter System

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
29 ft-lbs (39.3 N·m)
Important Notes
Ensure the starter motor is properly aligned with the engine before tightening.

Charging System

1

Alternator Mounting Bolts

M10 x 1.5
Torque Specification
29 ft-lbs (39.3 N·m)
Important Notes
Ensure the alternator is properly aligned with the mounting bracket before tightening.

Grounding System

1

Grounding Connection Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (13.6 N·m)
Important Notes
Estimated value based on similar grounding connections. Ensure the grounding point is clean and free of corrosion.

Ecu System

1

ECU Mounting Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20.3 N·m)
Important Notes
Estimated value based on similar ECU mounting bolts. Ensure the ECU is properly seated before tightening.

Wiring Harness System

1

Wiring Harness Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (10.9 N·m)
Important Notes
Estimated value based on similar wiring harness mounting bolts. Ensure the harness is properly routed before tightening.

Fuse Box System

1

Fuse Box Mounting Bolts

M6 x 1.0
Torque Specification
12 ft-lbs (16.3 N·m)
Important Notes
Estimated value based on similar fuse box mounting bolts. Ensure the fuse box is properly seated before tightening.

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust Manifold Headers

1

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.25
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Tighten in a crisscross pattern to ensure even pressure distribution.

Exhaust Pipe Connections

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Ensure a proper seal to prevent exhaust leaks.
2

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Ensure a proper seal to maintain exhaust flow and emissions control.

Emissions Control Components

1

EGR Valve Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24.4 N·m)
Important Notes
Ensure a tight seal to prevent exhaust gas leaks.
2

Oxygen Sensor (O2 Sensor) Mounting

M12 x 1.5
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Estimated value based on similar components. Ensure a secure fit to prevent exhaust leaks.
3

Catalytic Converter Heat Shield Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (24.4 N·m)
Important Notes
Estimated value based on similar components. Ensure the shield is securely mounted to prevent damage.
4

Exhaust Gas Temperature Sensor Mounting

M8 x 1.25
Torque Specification
18 ft-lbs (24.4 N·m)
Important Notes
Estimated value based on similar components. Ensure a secure fit for accurate temperature readings.
5

Secondary Air Injection System Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24.4 N·m)
Important Notes
Estimated value based on similar components. Ensure a tight seal for proper system operation.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold Headers

1

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Ensure proper sequence to avoid warping the manifold.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.25
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Ensure proper sequence to avoid warping the manifold.

Exhaust Pipe Connections

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Ensure proper alignment before tightening.
2

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Ensure proper alignment before tightening.
3

Muffler to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Ensure proper alignment before tightening.

Exhaust Clamps

1

Exhaust Clamp Bolts

M8 x 1.25
Torque Specification
22.5 ft-lbs (30.5 N·m)
Important Notes
Estimated value based on typical exhaust clamp configurations.

Exhaust Heat Shields

1

Exhaust Heat Shield Bolts

M6 x 1.0
Torque Specification
12.5 ft-lbs (16.9 N·m)
Important Notes
Estimated value based on typical heat shield configurations.

Fuel

Torque specifications for Fuel

Fuel Rail and Injectors

1

Fuel Rail Bolts

M10 x 1.5
Torque Specification
17 ft-lbs (23 N·m)
2

Fuel Injector Bolts

M9 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
3

Fuel Injector Rail Bolts

M8 x 1.25
Torque Specification
13 ft-lbs (17.6 N·m)

Fuel Pump and Tank

1

Fuel Pump Mounting Bolts

M12 x 1.75
Torque Specification
30 ft-lbs (40.7 N·m)
2

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (24.4 N·m)
Important Notes
Ensure proper torque to prevent fuel tank damage or leaks.

Fuel Fittings and Connections

1

Fuel Filler Neck Bolts

M12 x 1.25
Torque Specification
22 ft-lbs (29.8 N·m)
2

Fuel Filter Bolt/Nut

M10 x 1.25
Torque Specification
22 ft-lbs (29.8 N·m)
3

Fuel Pressure Regulator Mounting Bolts

M8 x 1.25
Torque Specification
1. 10 ft-lbs (13.6 N·m) 2. 12 ft-lbs (16.3 N·m)
Important Notes
Estimated torque values, consult manufacturer's recommendations.
4

Fuel Line Fittings

M6 x 1.0
Torque Specification
1. 10 ft-lbs (13.6 N·m) 2. 15 ft-lbs (20.3 N·m)
Important Notes
Estimated torque values, consult manufacturer's recommendations.
5

Fuel Injector O-Ring or Gasket Bolts

M6 x 0.75
Torque Specification
1. 5 ft-lbs (6.8 N·m) 2. 10 ft-lbs (13.6 N·m)
Important Notes
Estimated torque values, consult manufacturer's recommendations.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M10 x 1.25
Torque Specification
16 ft-lbs (21.7 N·m)
Important Notes
Ensure the compressor is properly aligned before tightening. Use a crisscross pattern for even torque distribution.

Ac Lines

1

A/C Line Fittings

M12 x 1.5
Torque Specification
20 ft-lbs (27.1 N·m)
Important Notes
Use a torque wrench to avoid overtightening, which can damage the fittings.

Evaporator Core

1

Evaporator Core Housing Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Estimated value based on similar M6 bolts in HVAC systems. Ensure the housing is sealed properly to prevent refrigerant leaks.

Blower Motor

1

Blower Motor Mounting Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8.1 N·m)
Important Notes
Estimated value based on similar M6 bolts in HVAC systems. Ensure the motor is securely mounted to prevent vibrations.

Heater Core

1

Heater Core Inlet/Outlet Pipe Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (13.6 N·m)
Important Notes
Estimated value based on similar M8 bolts in HVAC systems. Ensure a leak-free connection to maintain heating performance.

Hvac Controls

1

HVAC Control Panel Mounting Bolts

M5 x 0.8
Torque Specification
5 ft-lbs (6.8 N·m)
Important Notes
Estimated value based on similar M5 bolts in HVAC systems. Ensure the panel is securely mounted to prevent rattling.

Condenser

1

Condenser Mounting Bolts

M8 x 1.25
Torque Specification
12 ft-lbs (16.3 N·m)
Important Notes
Estimated value based on similar M8 bolts in HVAC systems. Ensure the condenser is securely mounted to prevent damage to refrigerant lines.

Suspension

Torque specifications for Suspension

Front Suspension

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
108 ft-lbs (146.5 N·m)
2

Control Arm Bolts

M12 x 1.25
Torque Specification
85 ft-lbs (115.2 N·m)
3

Upper Control Arm Bushing Bolts

M10 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value. Actual torque value may vary depending on the specific application and manufacturer's recommendations.
4

Lower Control Arm Bushing Bolts

M10 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value. Actual torque value may vary depending on the specific application and manufacturer's recommendations.

Steering System

1

Ball Joint Nut

M16 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
2

Tie Rod End Nut

M14 x 1.25
Torque Specification
36 ft-lbs (48.9 N·m)
3

Steering Gear/Rack Bolts

M12 x 1.25
Torque Specification
85 ft-lbs (115.2 N·m)

Sway Bar and Coil Spring

1

Sway Bar Link Nut

M14 x 1.25
Torque Specification
37 ft-lbs (50.1 N·m)
2

Coil Spring Mounting Bolts

M12 x 1.25
Torque Specification
35 ft-lbs (47.5 N·m)
Important Notes
Estimated value. Actual torque value may vary depending on the specific application and manufacturer's recommendations.
3

Stabilizer Bar Mounting Bolts

M12 x 1.25
Torque Specification
35 ft-lbs (47.5 N·m)
Important Notes
Estimated value. Actual torque value may vary depending on the specific application and manufacturer's recommendations.

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 correct torque for the cylinder head bolts on a 2010 Lexus IS?

The cylinder head bolts should be torqued to 80 ft-lbs (108 Nm) in three steps: 20 ft-lbs (27 Nm), 40 ft-lbs (54 Nm), and finally 80 ft-lbs (108 Nm).

Q2

What type of torque wrench IS recommended for critical fasteners like the cylinder head bolts?

A high-quality torque wrench with a click-type mechanism IS recommended for critical fasteners. Calibrated torque wrenches ensure accurate and consistent torque application.

Q3

Can I use a regular wrench to tighten bolts if I don't have a torque wrench?

No, using a regular wrench without a torque wrench IS strongly discouraged. Regular wrenches do not provide precise torque control, which can lead to over- or under-tightening, potentially damaging the fasteners or components.

Q4

What are the torque specifications for the lug nuts on the Lexus IS?

The lug nuts on the 2006-2013 Lexus IS should be torqued to 80 ft-lbs (108 Nm) using a star pattern.

Q5

Why IS it important to follow the correct torque specifications when working on my Lexus IS?

Following the manufacturer's torque specifications ensures proper component fitment, prevents damage to fasteners and components, and ensures optimal system performance and safety.

Q6

What are some common torque-related mistakes that I should avoid?

Common torque mistakes include over-tightening, under-tightening, using the wrong torque wrench, and not following the proper torque sequence. These mistakes can compromise the integrity of fasteners and components, potentially leading to leaks, failures, or safety hazards.

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 IS.

  • 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 Torque Specifications for Lexus IS (2006-2013)

Technical procedure overview specific to Lexus IS

  • **Engine:** - Cylinder head to block: 80 Nm (59 ft-lb) - Connecting rod cap bolt: 49 Nm (36 ft-lb) - Main bearing cap bolt: 68 Nm (50 ft-lb)
  • **Transmission:** - Transmission case to engine: 54 Nm (40 ft-lb) - Driveplate to crankshaft: 80 Nm (59 ft-lb)
  • **Suspension:** - Front lower control arm to subframe: 92 Nm (68 ft-lb) - Rear lower control arm to subframe: 68 Nm (50 ft-lb) - Front strut to knuckle: 54 Nm (40 ft-lb) - Rear shock absorber to knuckle: 34 Nm (25 ft-lb)
  • **Brakes:** - Caliper to hub: 108 Nm (80 ft-lb) - Rotor to hub: 19 Nm (14 ft-lb) - Master cylinder to brake booster: 23 Nm (17 ft-lb)
  • **Wheels:** - Wheel lug nuts: 113 Nm (83 ft-lb)
View full procedure
Technical Service Bulletins

Bolt Torque Specification Update for 2006-2008 Lexus IS

2008-05-15

Updated torque specifications for selected components.

2006-2008 IS

Resolution: Replace all affected bolts with new ones and tighten to the updated specifications: - Cylinder head to block: 87 Nm (64 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.
  • Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
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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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