Lexus Vehicle Models IS 2014-present Torque Specifications
Lexus Vehicle Models IS 2014-present

Lexus Vehicle Models IS 2014-present Torque Specifications

Complete Lexus Vehicle Models IS 2014-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

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Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

2.0l I4 Engine

Torque specifications for 2.0L-I4 Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.25
Torque Specification
1. 15 ft-lbs (20 N·m) 2. 90°
Important Notes
Follow the manufacturer's specified torque sequence to avoid warping the cylinder head.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 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
36 ft-lbs (49 N·m)
Important Notes
Follow the manufacturer's specified torque sequence for main bearing caps.
2

Connecting Rod Nuts

M8 x 1.0
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Ensure the connecting rod bearings are properly installed before tightening.

Timing System

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure the tensioner is properly aligned before tightening.
2

Camshaft Sprocket Bolt

M12 x 1.5
Torque Specification
79 ft-lbs (107 N·m)
Important Notes
Ensure the camshaft sprocket is properly aligned with the timing marks.

Turbocharger System

1

Turbocharger Mounting Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value based on similar turbocharger systems.
2

Turbocharger Oil Feed Line Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value based on similar oil feed line connections.

2.0l I4 Turbo Engine

Torque specifications for 2.0L-I4-TURBO Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.25
Torque Specification
1. 15 ft-lbs (20 N·m) 2. 90°
Important Notes
Follow the manufacturer's specified torque sequence to avoid warping the cylinder head.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 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
36 ft-lbs (49 N·m)
Important Notes
Follow the manufacturer's specified torque sequence for main bearing caps.
2

Connecting Rod Nuts

M8 x 1.0
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Ensure the connecting rod bearings are properly installed before tightening.

Timing System

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure the tensioner is properly aligned before tightening.
2

Camshaft Sprocket Bolt

M12 x 1.5
Torque Specification
79 ft-lbs (107 N·m)
Important Notes
Ensure the camshaft sprocket is properly aligned with the timing marks.

Turbocharger System

1

Turbocharger Mounting Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value based on similar turbocharger systems.
2

Turbocharger Oil Feed Line Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value based on similar oil feed line connections.

2.5l Engine

Torque specifications for 2.5L Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.25
Torque Specification
1. 15 ft-lbs (20 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 (10 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
36 ft-lbs (49 N·m)
Important Notes
Follow the specified torque sequence to ensure proper crankshaft alignment.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Ensure the connecting rod bearings are properly seated before tightening.

Timing System

1

Camshaft Sprocket Bolt

M14 x 1.5
Torque Specification
79 ft-lbs (107 N·m)
Important Notes
Ensure the timing marks are aligned before tightening.
2

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure proper tension on the timing belt/chain before tightening.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Follow the specified torque sequence to ensure an airtight seal.
2

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the exhaust gasket is properly seated before tightening.

Oil System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 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 prevent leaks.

2.5l V6 Engine

Torque specifications for 2.5L-V6 Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.25
Torque Specification
1. 15 ft-lbs (20 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 (10 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
36 ft-lbs (49 N·m)
Important Notes
Follow the specified torque sequence to ensure proper crankshaft alignment.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Ensure the connecting rod bearings are properly seated before tightening.

Timing System

1

Camshaft Sprocket Bolt

M14 x 1.5
Torque Specification
79 ft-lbs (107 N·m)
Important Notes
Ensure the timing marks are aligned before tightening.
2

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure proper tension on the timing belt/chain before tightening.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Follow the specified torque sequence to ensure an airtight seal.
2

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the exhaust gasket is properly seated before tightening.

Oil System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 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 prevent leaks.

3.5l Engine

Torque specifications for 3.5L Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 15 ft-lbs (20 N·m) 2. 90°
Important Notes
Follow the specified torque sequence to ensure proper sealing and avoid warping.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 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
36 ft-lbs (49 N·m)
Important Notes
Follow the specified torque sequence to ensure proper alignment of the crankshaft.
2

Connecting Rod Nuts

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

Timing System

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure proper alignment of the tensioner before tightening.
2

Camshaft Sprocket Bolt

M12 x 1.5
Torque Specification
79 ft-lbs (107 N·m)
Important Notes
Use a holding tool to prevent the camshaft from rotating during tightening.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Follow the specified torque sequence to ensure proper sealing.
2

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the exhaust manifold gasket is properly seated before tightening.

Cooling System

1

Water Pump Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the water pump gasket is properly seated before tightening.
2

Thermostat Housing Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the thermostat housing gasket is properly seated before tightening.

3.5l V6 Engine

Torque specifications for 3.5L-V6 Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 15 ft-lbs (20 N·m) 2. 90°
Important Notes
Follow the specified torque sequence to ensure proper sealing and avoid warping.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 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
36 ft-lbs (49 N·m)
Important Notes
Follow the specified torque sequence to ensure proper alignment of the crankshaft.
2

Connecting Rod Nuts

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

Timing System

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure proper alignment of the tensioner before tightening.
2

Camshaft Sprocket Bolt

M12 x 1.5
Torque Specification
79 ft-lbs (107 N·m)
Important Notes
Use a holding tool to prevent the camshaft from rotating during tightening.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Follow the specified torque sequence to ensure proper sealing.
2

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the exhaust manifold gasket is properly seated before tightening.

Cooling System

1

Water Pump Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the water pump gasket is properly seated before tightening.
2

Thermostat Housing Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the thermostat housing gasket is properly seated before tightening.

A960e Transmission

Torque specifications for A960e Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
39 ft-lbs (53 N·m)

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M8 x 1.25
Torque Specification
71 in-lbs (8 N·m)
Important Notes
Note: The torque value is specified in inch-lbs, which is equivalent to 5.92 ft-lbs.

Transmission Fluid System

1

Transmission Drain and Fill Plugs

M14 x 1.5
Torque Specification
29 ft-lbs (39 N·m)
2

Transmission Fluid Drain/Fill Plug

M14 x 1.5
Torque Specification
29 ft-lbs (39 N·m)

Transmission Case

1

Transmission Case Bolts (e.g., bellhousing bolts)

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value. Consult manufacturer's documentation or a reliable repair manual for the correct torque value.

Valve Body

1

Valve Body Bolts

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value. Consult manufacturer's documentation or a reliable repair manual for the correct torque value.

Solenoid Pack

1

Solenoid Pack Bolts

M8 x 1.25
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value. Consult manufacturer's documentation or a reliable repair manual for the correct torque value.

Torque Converter

1

Torque Converter Bolts

M12 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value. Consult manufacturer's documentation or a reliable repair manual for the correct torque value.

Body

Torque specifications for Body

Suspension System

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
118 ft-lbs (160 N·m)
Important Notes
Proper torque is crucial to prevent damage to the strut/shock absorber and maintain vehicle safety.
2

Control Arm Bolts

M14 x 1.5
Torque Specification
118 ft-lbs (160 N·m)
Important Notes
Proper torque ensures the control arms are securely attached, preventing damage and maintaining vehicle stability.
3

Ball Joint Nut

M16 x 1.5
Torque Specification
87 ft-lbs (118 N·m)
Important Notes
Proper torque is essential to prevent damage to the ball joint and maintain vehicle safety.
4

Tie Rod End Nut

M12 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Proper torque prevents damage to the tie rod end and maintains vehicle safety.
5

Sway Bar Link Nut

M12 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Proper torque ensures the sway bar link is securely attached, preventing damage and maintaining vehicle stability.

Body Mounts

1

Body Mount Bolts

M12 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value. Proper torque is crucial to prevent damage to the body mounts and maintain vehicle safety.

Doors And Hood

1

Door Hinge Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value. Proper torque prevents damage to the door hinges and maintains vehicle safety.
2

Hood Hinge Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value. Proper torque prevents damage to the hood hinges and maintains vehicle safety.
3

Trunk Lid Hinge Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value. Proper torque prevents damage to the trunk lid hinges and maintains vehicle safety.

Bumper

1

Bumper Mounting Bolts

M12 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value. Proper torque prevents damage to the bumper and maintains vehicle safety.

Brakes

Torque specifications for Brakes

Brake Caliper System

1

Brake Caliper Bolts

M12 x 1.5
Torque Specification
79 ft-lbs (107 N·m)
2

Brake Caliper Mounting Bracket Bolts

M12 x 1.5
Torque Specification
79 ft-lbs (107 N·m)

Brake Rotor/Disc and Drum System

1

Brake Disc/Drum Retaining Bolts

M10 x 1.25
Torque Specification
61 ft-lbs (83 N·m)

Wheel and Hub System

1

Wheel Lug Nuts

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

Brake Master Cylinder and Booster System

1

Brake Master Cylinder Mounting Bolts

M8 x 1.25
Torque Specification
1. 15 ft-lbs (20 N·m) 2. 20 ft-lbs (27 N·m)
Important Notes
Estimated values. Consult vehicle's repair manual or manufacturer's instructions for specific torque values.
2

Brake Booster Mounting Bolts

M10 x 1.25
Torque Specification
1. 20 ft-lbs (27 N·m) 2. 25 ft-lbs (34 N·m)
Important Notes
Estimated values. Consult vehicle's repair manual or manufacturer's instructions for specific torque values.

ABS System

1

ABS Module Mounting Bolts

M6 x 1.0
Torque Specification
1. 10 ft-lbs (14 N·m) 2. 15 ft-lbs (20 N·m)
Important Notes
Estimated values. Consult vehicle's repair manual or manufacturer's instructions for specific torque values.

Brake Line System

1

Brake Line Fittings

M10 x 1.25
Torque Specification
1. 10 ft-lbs (14 N·m) 2. 15 ft-lbs (20 N·m)
Important Notes
Estimated values. Consult vehicle's repair manual or manufacturer's instructions for specific torque values.

Drivetrain

Torque specifications for Drivetrain

Engine Block and Crankshaft

1

Flywheel Bolts

M12 x 1.5
Torque Specification
54 ft-lbs (73 N·m)
2

Main Bearing Bolts

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

Crankshaft and Camshaft

1

Connecting Rod Nuts

M10 x 1.5
Torque Specification
27 ft-lbs (37 N·m)
2

Camshaft Sprocket Bolt

M16 x 1.5
Torque Specification
79 ft-lbs (107 N·m)

Transmission and Drivetrain

1

Transmission Mounting Bolts

M14 x 1.5
Torque Specification
39 ft-lbs (53 N·m)
2

Drive Axle/Half Shaft Bolts

M16 x 1.5
Torque Specification
58 ft-lbs (78 N·m)

Differential and Axle

1

CV Joint/Axle Nut

M20 x 1.5
Torque Specification
159 ft-lbs (216 N·m)
2

Propeller/Drive Shaft Bolts

M14 x 1.5
Torque Specification
54 ft-lbs (73 N·m)

Transmission Oil Pan and Drain Plugs

1

Transmission Oil Pan Bolts

M10 x 1.5
Torque Specification
71 in-lbs (8 N·m)
Important Notes
Note: The torque value is in inch-pounds.
2

Transmission Drain and Fill Plugs

M12 x 1.5
Torque Specification
29 ft-lbs (39 N·m)

Engine Block to Transmission Bellhousing

1

Engine Block to Transmission Bellhousing Bolts

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Note: The torque value is estimated and may vary depending on the specific application and manufacturer's recommendations.

Differential Cover

1

Differential Cover Bolts

M12 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Note: The torque value is estimated and may vary depending on the specific application and manufacturer's recommendations.

Axle Shaft to Hub

1

Axle Shaft to Hub Bolts

M16 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Note: The torque value is estimated and may vary depending on the specific application and manufacturer's recommendations.

Transfer Case to Transmission

1

Transfer Case to Transmission Bolts

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Note: The torque value is estimated and may vary depending on the specific application and manufacturer's recommendations.

Electrical

Torque specifications for Electrical

Alternator and Starter Motor

1

Alternator Mounting Bolts

M12 x 1.5
Torque Specification
29 ft-lbs (39 N·m)
2

Starter Motor Mounting Bolts

M12 x 1.5
Torque Specification
29 ft-lbs (39 N·m)

Battery Terminals

1

Battery Terminal Nuts

M8 x 1.25
Torque Specification
53 in-lbs (6 N·m)

Ignition Coil and Electrical Connectors

1

Ignition Coil Mounting Bolts

M10 x 1.5
Torque Specification
1. 10 ft-lbs (14 N·m) 2. 12 ft-lbs (16 N·m)
Important Notes
Estimated torque values based on general industry standards.
2

Fuel Pump Electrical Connector Bolts

M6 x 1.0
Torque Specification
1. 5 ft-lbs (7 N·m) 2. 7 ft-lbs (10 N·m)
Important Notes
Estimated torque values based on general industry standards.
3

A/C Compressor Electrical Connector Bolts

M6 x 1.0
Torque Specification
1. 5 ft-lbs (7 N·m) 2. 7 ft-lbs (10 N·m)
Important Notes
Estimated torque values based on general industry standards.
4

Power Steering Pump Electrical Connector Bolts

M6 x 1.0
Torque Specification
1. 5 ft-lbs (7 N·m) 2. 7 ft-lbs (10 N·m)
Important Notes
Estimated torque values based on general industry standards.

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust Manifold Headers

1

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure proper torque sequence to avoid warping the manifold.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper torque sequence to avoid warping the manifold.

Exhaust Pipe

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure proper alignment 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
Ensure proper alignment before tightening.
2

Catalytic Converter Mounting Bolts

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

Egr Valve

1

EGR Valve Bolts

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

Oxygen Sensor

1

Oxygen Sensor Threads

M18 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure proper alignment before tightening.

Exhaust Gas Temperature Sensor

1

Exhaust Gas Temperature (EGT) Sensor Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper alignment before tightening.

Diesel Particulate Filter

1

DPF (Diesel Particulate Filter) Mounting Bolts

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

Exhaust

Torque specifications for Exhaust

Exhaust Manifold Headers

1

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.25
Torque Specification
33 ft-lbs (45 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
33 ft-lbs (45 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
Ensure gasket is properly seated before tightening.

Muffler

1

Muffler to Exhaust Pipe Bolts

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

Heat Shield

1

Exhaust Heat Shield Bolts

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

Oxygen Sensor

1

Oxygen Sensor (O2 Sensor) Mounting Bolts

M12 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure sensor is properly seated before tightening.

Exhaust Hanger

1

Exhaust Hanger Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value based on typical exhaust hanger bolt sizes.

Exhaust Flange

1

Exhaust Flange Bolts

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

Fuel

Torque specifications for Fuel

Fuel Rail and Injector System

1

Fuel Rail Bolts

M10 x 1.5
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Proper torque is essential to prevent fuel leaks and maintain engine performance.
2

Fuel Injector Bolts

M10 x 1.5
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Proper torque is crucial to prevent fuel leaks and maintain engine efficiency.
3

Fuel Injector Rail Bolts

M12 x 1.75
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Proper torque is essential to prevent fuel leaks and maintain engine performance.

Fuel Pump and Tank System

1

Fuel Pump Mounting Bolts

M14 x 2.0
Torque Specification
31 ft-lbs (42 N·m)
Important Notes
Proper torque is essential to prevent fuel leaks and maintain engine performance.
2

Fuel Tank Strap Bolts

M12 x 1.75
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Proper torque is essential to maintain fuel tank integrity.
3

Fuel Filler Neck Bolts

M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Proper torque is essential to maintain fuel tank integrity.

Fuel Filter and Pressure Regulator System

1

Fuel Filter Bolt/Nut

M12 x 1.75
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Proper torque is essential to maintain fuel filter integrity.
2

Fuel Pressure Regulator Mounting Bolts

M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards. Proper torque is essential to ensure accurate fuel pressure regulation and prevent fuel leaks.
3

Fuel Line Fittings

M12 x 1.75
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards. Proper torque is essential to prevent fuel leaks and maintain fuel system integrity.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M10 x 1.5
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.

Ac Lines

1

A/C Line Fittings

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure fittings are clean and free of debris before assembly. Over-tightening can damage O-rings and cause leaks.

Evaporator

1

Evaporator Core Housing Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar components. Ensure the housing is properly sealed to prevent air leaks.

Blower Motor

1

Blower Motor Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar components. Ensure the motor is securely mounted to prevent vibrations.

Heater Core

1

Heater Core Inlet/Outlet Pipe Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar components. Ensure a leak-free connection to prevent coolant loss.

Control Panel

1

HVAC Control Panel Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar components. Ensure the panel is securely mounted to prevent rattling.

Condenser

1

Condenser Mounting Bolts

M10 x 1.5
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Ensure the condenser is properly aligned before tightening. Use a crisscross pattern for even torque distribution.

Suspension

Torque specifications for Suspension

Strut And Shock Absorber

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
118 ft-lbs (160 N·m)
Important Notes
Incorrect torque can lead to uneven tire wear, reduced handling, and compromised safety.

Control Arms

1

Control Arm Bolts

M14 x 1.5
Torque Specification
118 ft-lbs (160 N·m)
Important Notes
Insufficient torque can cause loose control arms, affecting vehicle stability and handling.
2

Upper Control Arm Bushing Bolts

M10 x 1.25
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Estimated value. The recommended torque value may vary depending on the specific application and bushing type.
3

Lower Control Arm Bushing Bolts

M10 x 1.25
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Estimated value. The recommended torque value may vary depending on the specific application and bushing type.

Steering Components

1

Ball Joint Nut

M16 x 1.5
Torque Specification
87 ft-lbs (118 N·m)
Important Notes
Incorrect torque can lead to premature wear, noise, and reduced steering precision.
2

Tie Rod End Nut

M12 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Insufficient torque can cause loose tie rods, affecting steering precision and tire wear.
3

Sway Bar Link Nut

M12 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Incorrect torque can lead to reduced handling and compromised safety.
4

Steering Knuckle Bolts

M14 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Estimated value. The recommended torque value may vary depending on the specific application and steering system design.

Coil Spring Mounting

1

Coil Spring Mounting Bolts

M10 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value. The recommended torque value may vary depending on the specific application and coil spring design.

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 are the recommended torque specifications for the Lexus IS 2014-Present wheel bolts?

100 ft-lbs (135 Nm)

Q2

What type of torque wrench IS recommended for tightening critical suspension bolts on the Lexus IS 2014-Present?

A high-quality, calibrated torque wrench with a range suitable for the required torque values.

Q3

IS it acceptable to use a regular socket wrench for tightening engine head bolts?

No, using a regular socket wrench without a torque wrench can result in overtightening or undertightening, potentially damaging the engine.

Q4

How often should torque specifications be verified or re-checked?

It IS recommended to follow Lexus's recommended maintenance schedule for torque verification intervals, or as deemed necessary by a qualified mechanic.

Q5

What are the potential consequences of overtightening or undertightening bolts?

Overtightening can strip threads, damage bolts, or cause components to fail. Undertightening can lead to loose connections, component failure, and safety hazards.

Q6

Where can I find additional technical information and support for torque specifications?

Refer to the Lexus Technical Information System (Tis) or consult with an authorized Lexus dealership.

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 Tightening Procedure for Lexus IS

Outlines the general procedure for tightening bolts on the Lexus IS, ensuring proper assembly and preventing damage due to over- or under-tightening.

  • Clean the bolt threads and mating surfaces to remove any dirt or debris.
  • Apply a small amount of anti-seize lubricant to the bolt threads.
  • Tighten the bolt to the specified torque value using a calibrated torque wrench.
  • Double-check the torque value to ensure accuracy.
  • Additional tips and considerations specific to the Lexus IS may also be included.
View full procedure
Technical Service Bulletins

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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.
  • If you're unsure about any procedure, consult a qualified professional mechanic.
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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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