Lexus Vehicle Models RC 2015-present Torque Specifications
Lexus Vehicle Models RC 2015-present

Lexus Vehicle Models RC 2015-present Torque Specifications

Complete Lexus Vehicle Models RC 2015-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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Torque Calculator

Convert between different torque units

2.0l I4 Engine

Torque specifications for 2.0L-I4 Engine

Cylinder Head and Engine Block

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Main Bearing Bolts

M14 x 1.5
Torque Specification
18 ft-lbs (25 N·m)

Crankshaft and Connecting Rods

1

Connecting Rod Nuts

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Flywheel Bolts

M16 x 1.5
Torque Specification
48 ft-lbs (65 N·m)

Valvetrain and Timing System

1

Camshaft Sprocket Bolt

M14 x 1.5
Torque Specification
58 ft-lbs (78 N·m)
2

Timing Belt/Chain Tensioner Bolt

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

Intake and Exhaust System

1

Intake Manifold Bolts

M12 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
2

Exhaust Manifold/Headers Bolts

M14 x 1.5
Torque Specification
26 ft-lbs (35 N·m)

Turbocharger and Intercooler System

1

Turbocharger Mounting Bolts

M16 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on general industry standards.
2

Intercooler Mounting Bolts

M14 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Estimated value based on general industry standards.

Fuel System

1

Fuel Rail Bolts

M12 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
2

Fuel Injector Bolts

M10 x 1.5
Torque Specification
11 ft-lbs (15 N·m)

Ignition System

1

Spark Plugs

M14 x 1.25
Torque Specification
13 ft-lbs (18 N·m)
2

Ignition Coil Bolt

M10 x 1.5
Torque Specification
69 in-lbs (8 N·m)

2.0l I4 Turbo Engine

Torque specifications for 2.0L-I4-TURBO Engine

Cylinder Head and Engine Block

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Main Bearing Bolts

M14 x 1.5
Torque Specification
18 ft-lbs (25 N·m)

Crankshaft and Connecting Rods

1

Connecting Rod Nuts

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Flywheel Bolts

M16 x 1.5
Torque Specification
48 ft-lbs (65 N·m)

Valvetrain and Timing System

1

Camshaft Sprocket Bolt

M14 x 1.5
Torque Specification
58 ft-lbs (78 N·m)
2

Timing Belt/Chain Tensioner Bolt

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

Intake and Exhaust System

1

Intake Manifold Bolts

M12 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
2

Exhaust Manifold/Headers Bolts

M14 x 1.5
Torque Specification
26 ft-lbs (35 N·m)

Turbocharger and Intercooler System

1

Turbocharger Mounting Bolts

M16 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on general industry standards.
2

Intercooler Mounting Bolts

M14 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Estimated value based on general industry standards.

Fuel System

1

Fuel Rail Bolts

M12 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
2

Fuel Injector Bolts

M10 x 1.5
Torque Specification
11 ft-lbs (15 N·m)

Ignition System

1

Spark Plugs

M14 x 1.25
Torque Specification
13 ft-lbs (18 N·m)
2

Ignition Coil Bolt

M10 x 1.5
Torque Specification
69 in-lbs (8 N·m)

2.5l Engine

Torque specifications for 2.5L Engine

Cylinder Head and Engine Block

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Main Bearing Bolts

M14 x 1.5
Torque Specification
18 ft-lbs (25 N·m)

Crankshaft and Connecting Rods

1

Connecting Rod Nuts

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Flywheel Bolts

M16 x 1.5
Torque Specification
48 ft-lbs (65 N·m)

Valvetrain and Timing System

1

Camshaft Sprocket Bolt

M14 x 1.5
Torque Specification
58 ft-lbs (78 N·m)
2

Timing Belt/Chain Tensioner Bolt

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

Engine Mounts and Bellhousing

1

Engine Mounting Bolts

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value, consult manufacturer's recommendations for correct torque value.
2

Engine Block to Transmission Bellhousing Bolts

M16 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value, consult manufacturer's recommendations for correct torque value.

Intake and Exhaust System

1

Intake Manifold Bolts

M12 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
2

Exhaust Manifold/Headers Bolts

M14 x 1.5
Torque Specification
26 ft-lbs (35 N·m)

Fuel System

1

Fuel Rail Bolts

M12 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
2

Fuel Injector Bolts

M10 x 1.5
Torque Specification
11 ft-lbs (15 N·m)

Ignition System

1

Spark Plugs

M14 x 1.25
Torque Specification
13 ft-lbs (18 N·m)
2

Ignition Coil Bolt

M10 x 1.5
Torque Specification
69 in-lbs (8 N·m)

Engine Accessories

1

Oil Filter Housing Bolt

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Oil Drain Plug Bolt

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

2.5l V6 Engine

Torque specifications for 2.5L-V6 Engine

Cylinder Head and Engine Block

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Main Bearing Bolts

M14 x 1.5
Torque Specification
18 ft-lbs (25 N·m)

Crankshaft and Connecting Rods

1

Connecting Rod Nuts

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Flywheel Bolts

M16 x 1.5
Torque Specification
48 ft-lbs (65 N·m)

Valvetrain and Timing System

1

Camshaft Sprocket Bolt

M14 x 1.5
Torque Specification
58 ft-lbs (78 N·m)
2

Timing Belt/Chain Tensioner Bolt

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

Engine Mounts and Bellhousing

1

Engine Mounting Bolts

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value, consult manufacturer's recommendations for correct torque value.
2

Engine Block to Transmission Bellhousing Bolts

M16 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value, consult manufacturer's recommendations for correct torque value.

Intake and Exhaust System

1

Intake Manifold Bolts

M12 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
2

Exhaust Manifold/Headers Bolts

M14 x 1.5
Torque Specification
26 ft-lbs (35 N·m)

Fuel System

1

Fuel Rail Bolts

M12 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
2

Fuel Injector Bolts

M10 x 1.5
Torque Specification
11 ft-lbs (15 N·m)

Ignition System

1

Spark Plugs

M14 x 1.25
Torque Specification
13 ft-lbs (18 N·m)
2

Ignition Coil Bolt

M10 x 1.5
Torque Specification
69 in-lbs (8 N·m)

Engine Accessories

1

Oil Filter Housing Bolt

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Oil Drain Plug Bolt

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

3.5l Engine

Torque specifications for 3.5L Engine

Cylinder Head and Engine Block

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Main Bearing Bolts

M14 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
3

Engine Block to Transmission Mounting Bolts

M16 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on general industry standards.

Crankshaft and Connecting Rods

1

Connecting Rod Nuts

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Crankshaft Pulley/Harmonic Balancer Bolt

M18 x 1.5
Torque Specification
130 ft-lbs (176 N·m)

Camshaft and Valve Train

1

Camshaft Sprocket Bolt

M14 x 1.5
Torque Specification
58 ft-lbs (78 N·m)
2

Rocker Arms/Shafts Bolts

M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)

Intake and Exhaust Systems

1

Intake Manifold Bolts

M12 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
2

Exhaust Manifold/Headers Bolts

M14 x 1.5
Torque Specification
26 ft-lbs (35 N·m)

Engine Accessories

1

Alternator Mounting Bolts

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Starter Motor Mounting Bolts

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

Engine Mounts and Oil System

1

Engine Mounting Bolts

M16 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on general industry standards.
2

Oil Pan Bolts

M12 x 1.5
Torque Specification
69 in-lbs (8 N·m)

3.5l V6 Engine

Torque specifications for 3.5L-V6 Engine

Cylinder Head and Engine Block

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Main Bearing Bolts

M14 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
3

Engine Block to Transmission Mounting Bolts

M16 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on general industry standards.

Crankshaft and Connecting Rods

1

Connecting Rod Nuts

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Crankshaft Pulley/Harmonic Balancer Bolt

M18 x 1.5
Torque Specification
130 ft-lbs (176 N·m)

Camshaft and Valve Train

1

Camshaft Sprocket Bolt

M14 x 1.5
Torque Specification
58 ft-lbs (78 N·m)
2

Rocker Arms/Shafts Bolts

M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)

Intake and Exhaust Systems

1

Intake Manifold Bolts

M12 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
2

Exhaust Manifold/Headers Bolts

M14 x 1.5
Torque Specification
26 ft-lbs (35 N·m)

Engine Accessories

1

Alternator Mounting Bolts

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Starter Motor Mounting Bolts

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

Engine Mounts and Oil System

1

Engine Mounting Bolts

M16 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on general industry standards.
2

Oil Pan Bolts

M12 x 1.5
Torque Specification
69 in-lbs (8 N·m)

5.0l Engine

Torque specifications for 5.0L Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 18 ft-lbs (25 N·m) 2. 90°
Important Notes
Follow the manufacturer's torque sequence diagram for proper tightening.

Crankshaft And Bearings

1

Main Bearing Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper alignment of bearing caps before tightening.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper alignment of connecting rods before tightening.

Flywheel

1

Flywheel Bolts

M12 x 1.5
Torque Specification
48 ft-lbs (65 N·m)
Important Notes
Ensure the flywheel is properly seated on the crankshaft before tightening.

Oil System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
5.75 ft-lbs (8 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.
2

Oil Pump Bolts

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

Valvetrain

1

Valve Cover Bolts

M6 x 1.0
Torque Specification
5.75 ft-lbs (8 N·m)
Important Notes
Ensure the valve cover gasket is properly seated before tightening.
2

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure proper alignment of rocker arms before tightening.

5.0l V8 Engine

Torque specifications for 5.0L-V8 Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 18 ft-lbs (25 N·m) 2. 90°
Important Notes
Follow the manufacturer's torque sequence diagram for proper tightening.

Crankshaft And Bearings

1

Main Bearing Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper alignment of bearing caps before tightening.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper alignment of connecting rods before tightening.

Flywheel

1

Flywheel Bolts

M12 x 1.5
Torque Specification
48 ft-lbs (65 N·m)
Important Notes
Ensure the flywheel is properly seated on the crankshaft before tightening.

Oil System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
5.75 ft-lbs (8 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.
2

Oil Pump Bolts

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

Valvetrain

1

Valve Cover Bolts

M6 x 1.0
Torque Specification
5.75 ft-lbs (8 N·m)
Important Notes
Ensure the valve cover gasket is properly seated before tightening.
2

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure proper alignment of rocker arms before tightening.

8sds Transmission

Torque specifications for 8sds Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M14 x 1.5
Torque Specification
42 ft-lbs (57 N·m)

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M10 x 1.25
Torque Specification
5.7 ft-lbs (8 N·m)
Important Notes
Estimated value, as original specification was in inch-lbs.

Transmission Drain and Fill

1

Transmission Drain and Fill Plugs

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

Transmission Case

1

Transmission Case Bolts

M14 x 1.5
Torque Specification
1. 50 ft-lbs (68 N·m) 2. 60 ft-lbs (82 N·m)
Important Notes
Estimated value range, as original specification was not provided.

Transmission Bellhousing

1

Transmission Bellhousing Bolts

M12 x 1.5
Torque Specification
1. 30 ft-lbs (40 N·m) 2. 40 ft-lbs (54 N·m)
Important Notes
Estimated value range, as original specification was not provided.

Transmission Crossmember

1

Transmission Crossmember Bolts

M14 x 1.5
Torque Specification
1. 40 ft-lbs (54 N·m) 2. 50 ft-lbs (68 N·m)
Important Notes
Estimated value range, as original specification was not provided.

Torque Converter

1

Torque Converter Bolts

M12 x 1.5
Torque Specification
1. 30 ft-lbs (40 N·m) 2. 40 ft-lbs (54 N·m)
Important Notes
Estimated value range, as original specification was not provided.

Body

Torque specifications for Body

Suspension and Steering

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
177 ft-lbs (240 N·m)
2

Control Arm Bolts

M12 x 1.25
Torque Specification
85 ft-lbs (115 N·m)
3

Ball Joint Nut

M16 x 1.5
Torque Specification
76 ft-lbs (103 N·m)
4

Tie Rod End Nut

M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
5

Sway Bar Link Nut

M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
6

Steering Gear/Rack Bolts

M14 x 1.5
Torque Specification
83 ft-lbs (113 N·m)

Body Mounts and Hinges

1

Body Mount Bolts

M12 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value. Consult the vehicle's repair manual or manufacturer's documentation for accurate torque values.
2

Door Hinge Bolts

M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value. Consult the vehicle's repair manual or manufacturer's documentation for accurate torque values.
3

Hood Hinge Bolts

M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value. Consult the vehicle's repair manual or manufacturer's documentation for accurate torque values.
4

Trunk Lid Hinge Bolts

M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value. Consult the vehicle's repair manual or manufacturer's documentation for accurate torque values.
5

Bumper Mounting Bolts

M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value. Consult the vehicle's repair manual or manufacturer's documentation for accurate torque values.

Brakes

Torque specifications for Brakes

Brake Caliper

1

Brake Caliper Bolts

M12 x 1.5
Torque Specification
79 ft-lbs (107 N·m)
Important Notes
Ensure proper alignment of the caliper during installation.
2

Brake Caliper Mounting Bracket Bolts

M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Ensure the bracket is securely attached to the steering knuckle or axle.

Brake Rotor

1

Brake Disc/Drum Retaining Bolts

M8 x 1.25
Torque Specification
51 ft-lbs (69 N·m)
Important Notes
Ensure the rotor or drum is seated properly on the hub.

Brake Hydraulics

1

Brake Hose Banjo Bolt

M10 x 1.0
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Use new sealing washers to prevent leaks.
2

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
18 ft-lbs (25 N·m)
Important Notes
Ensure the booster is properly aligned with the firewall.
2

Brake Pedal Assembly Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the pedal operates smoothly after installation.

Abs System

1

ABS Sensor Mounting Bolts

M6 x 1.0
Torque Specification
6.7 ft-lbs (9 N·m)
Important Notes
Ensure the sensor is properly aligned with the tone ring.

Wheel Assembly

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Use a star pattern to tighten lug nuts evenly.

Drivetrain

Torque specifications for Drivetrain

Engine and Transmission Mounting

1

Engine Block to Transmission Bellhousing Bolts

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value, as original specification was a range.
2

Transmission Crossmember Bolts

M12 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value, as original specification was a range.
3

Transfer Case Mounting Bolts

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value, as original specification was a range.

Flywheel and Crankshaft

1

Flywheel Bolts

M12 x 1.5
Torque Specification
48 ft-lbs (65 N·m)
2

Main Bearing Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
3

Connecting Rod Nuts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
4

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 1.5
Torque Specification
130 ft-lbs (176 N·m)

Transmission and Driveshaft

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
42 ft-lbs (57 N·m)
2

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Specification
58 ft-lbs (78 N·m)
3

CV Joint/Axle Nut

M16 x 1.5
Torque Specification
159 ft-lbs (216 N·m)
4

Propeller/Drive Shaft Bolts

M14 x 1.5
Torque Specification
58 ft-lbs (78 N·m)

Differential and Transfer Case

1

Differential Drain/Fill Plug

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

Transfer Case Drain/Fill Plug

M12 x 1.5
Torque Specification
29 ft-lbs (39 N·m)
3

Differential Cover Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value, as original specification was a range.
4

Driveshaft Center Bearing Bolts

M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value, as original specification was a range.

Electrical

Torque specifications for Electrical

Alternator And Starter Motor

1

Alternator Mounting Bolts

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Proper torque ensures the alternator is securely attached to the engine block.
2

Starter Motor Mounting Bolts

M14 x 1.5
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Proper torque ensures the starter motor is securely attached to the engine block.

Battery Terminals

1

Battery Terminal Nuts

M8 x 1.25
Torque Specification
4.7 ft-lbs (6 N·m)
Important Notes
Proper torque prevents loose connections, which can cause electrical system malfunctions.

Ignition Coil And Fuel Pump

1

Ignition Coil Mounting Bolts

M10 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Estimated value based on general industry guidelines. Proper torque ensures the ignition coil is securely attached to the engine block.
2

Fuel Pump Electrical Connector Bolts

M6 x 1.0
Torque Specification
0.7 ft-lbs (0.9 N·m)
Important Notes
Estimated value based on general industry guidelines. Proper torque ensures a reliable electrical connection.

A/C Compressor

1

A/C Compressor Electrical Connector Bolts

M6 x 1.0
Torque Specification
0.7 ft-lbs (0.9 N·m)
Important Notes
Estimated value based on general industry guidelines. Proper torque ensures a reliable electrical connection.

Emissions Sensors

Torque specifications for Emissions_sensors

Egr System

1

EGR Valve Bolts

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

Exhaust Manifold

1

Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Use a crisscross pattern to ensure even pressure on the manifold.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

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

Exhaust Pipe

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Use a new gasket to ensure a proper seal.
2

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the catalytic converter is properly aligned before tightening.

Oxygen Sensors

1

Oxygen Sensor (O2 Sensor) Mounting

M12 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Estimated value based on similar sensor mounting specifications.

Heat Shields

1

Catalytic Converter Heat Shield Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar heat shield bolt specifications.

Temperature Sensors

1

Exhaust Gas Temperature Sensor Mounting

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar sensor mounting specifications.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold and Headers

1

Exhaust Manifold/Headers to Engine Block Bolts

M12 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.25
Torque Specification
18 ft-lbs (25 N·m)

Exhaust Pipe and Connections

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M12 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
2

Catalytic Converter to Exhaust Pipe Bolts

M12 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
3

Muffler to Exhaust Pipe Bolts

M12 x 1.5
Torque Specification
26 ft-lbs (35 N·m)

Oxygen Sensor and Heat Shield

1

Oxygen Sensor Bolts

M8 x 1.25
Torque Specification
22.5 ft-lbs (30.5 N·m)
Important Notes
Estimated value, consult vehicle's service manual for accurate torque value.
2

Heat Shield Bolts

M6 x 1.0
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated value, consult vehicle's service manual for accurate torque value.

Exhaust System Mounting

1

Exhaust System Mounting Bolts

M14 x 1.5
Torque Specification
35 ft-lbs (47.5 N·m)
Important Notes
Estimated value, consult vehicle's service manual for accurate torque value.

Exhaust Pipe Flange

1

Exhaust Pipe Flange Bolts

M10 x 1.25
Torque Specification
22.5 ft-lbs (30.5 N·m)
Important Notes
Estimated value, consult vehicle's service manual for accurate torque value.

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

Fuel Injector Bolts

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

Fuel Injector Rail Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten in a crisscross pattern to ensure even pressure distribution.

Fuel Pump And Tank

1

Fuel Pump Mounting Bolts

M6 x 1.0
Torque Specification
6.67 ft-lbs (9 N·m)
Important Notes
Ensure the pump is properly aligned before tightening.
2

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Ensure the tank is properly supported before tightening.
3

Fuel Tank Sender Unit Bolts

M6 x 1.0
Torque Specification
6.67 ft-lbs (9 N·m)
Important Notes
Ensure the sender unit is properly seated before tightening.

Fuel Lines And Fittings

1

High-Pressure Fuel Line Fittings

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure fittings are properly aligned before tightening.
2

Fuel Filter Bolt/Nut

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the filter housing is properly seated before tightening.
3

Fuel Line Clamp Bolts

M6 x 1.0
Torque Specification
6.67 ft-lbs (9 N·m)
Important Notes
Ensure clamps are properly positioned before tightening.

Fuel Filler Neck

1

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
6.67 ft-lbs (9 N·m)
Important Notes
Ensure the filler neck is properly aligned before tightening.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure.

Ac Lines

1

A/C Line Fittings

M8 x 1.25
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
Use a torque wrench to avoid overtightening, which can damage fittings.

Evaporator Core

1

Evaporator Core Housing Bolts

M6 x 1.0
Torque Specification
6.67 ft-lbs (9 N·m)
Important Notes
Estimated value based on typical M6 bolt torque specifications.

Blower Motor

1

Blower Motor Mounting Bolts

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

Heater Core

1

Heater Core Inlet/Outlet Pipe Bolts

M6 x 1.0
Torque Specification
6.67 ft-lbs (9 N·m)
Important Notes
Estimated value based on typical M6 bolt torque specifications.

Hvac Case

1

HVAC Case Assembly Bolts

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

Condenser

1

Condenser Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure.

Suspension

Torque specifications for Suspension

Strut/Shock Absorber Mounting

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
177 ft-lbs (240 N·m)
Important Notes
Proper torque is crucial to maintain the suspension's performance and prevent damage.

Control Arms

1

Upper Control Arm Bushing Bolts

M10 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value based on industry standards for similar applications.
2

Lower Control Arm Bolts

M16 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Estimated value based on industry standards for similar applications.

Steering Components

1

Ball Joint Nut

M18 x 1.5
Torque Specification
76 ft-lbs (103 N·m)
Important Notes
Proper torque is essential to prevent loose connections and ensure safe operation.
2

Tie Rod End Nut

M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Maintains proper toe alignment and prevents loose connections.
3

Steering Knuckle Bolts

M16 x 1.5
Torque Specification
85 ft-lbs (115 N·m)
Important Notes
Estimated value based on industry standards for similar applications.

Sway Bar and Coil Spring

1

Sway Bar Link Nut

M10 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Maintains proper suspension stability and prevents loose connections.
2

Coil Spring Mounting Bolts

M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value based on industry standards for similar applications.

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 proper tightening sequence for critical suspension components, such as the ball joints and control arms?

Refer to Lexus technical service bulletin TSB-0056 for the prescribed tightening sequence and torque specifications. Failure to follow the specified sequence can lead to uneven loading and compromise component integrity.

Q2

What type of torque wrench IS recommended for accurate torque application on the Lexus RC?

Use a high-quality, calibrated torque wrench with a range that covers the specified torque values for the vehicle. A beam-type or digital torque wrench IS recommended for precise tightening.

Q3

What precautions should be taken when using power tools for torque application?

Always use power tools with a torque limiter or calibrate them to the desired torque value. Overtightening can damage threads, strip bolts, and compromise component integrity.

Q4

How often should torque specifications be checked or reapplied?

Torque specifications should be checked or reapplied as per the maintenance schedule or after major repairs or component replacements. Ignoring torque specifications can lead to loose fasteners, vibrations, and potential safety hazards.

Q5

What IS the recommended torque for the lug nuts on the Lexus RC?

The proper torque for lug nuts on the Lexus RC IS 96 ft-lbs (130 Nm). Always use a torque wrench to ensure proper tightening.

Q6

Can I use aftermarket bolts or fasteners with different torque specifications?

Using aftermarket bolts or fasteners with different torque specifications IS not recommended. Original equipment manufacturer (OEM) components are designed and tested to meet specific torque requirements, and using non-OEM parts can compromise safety and performance.

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 RC.

  • Digital display for accurate readings
  • Audible alarm when target torque IS reached
  • Multiple units (Nm, ft-lb, in-lb)
  • Reversible ratcheting mechanism
Learn more
Service Procedures

Engine and Driveline Component Bolt Tightening Specifications

Comprehensive procedure outlining torque specifications for engine, transmission, and differential components.

  • Locate the engine component or driveline component that requires torque tightening.
  • Identify the size and grade of the bolt or nut being torqued.
  • Refer to the torque specifications table for the correct torque value.
  • Use the digital torque wrench to tighten the bolt or nut to the specified torque.
  • Tighten the bolt or nut in a star pattern or sequence as specified in the service manual.
  • Verify the tightness of the bolt or nut after tightening.
View full procedure

Suspension and Steering Component Bolt Tightening Specifications

Detailed guide with torque specifications for suspension and steering components.

  • Identify the suspension or steering component that requires torque tightening.
  • Locate the bolt or nut that needs to be tightened.
  • Refer to the torque specifications table for the appropriate torque value.
  • Use the digital torque wrench to tighten the bolt or nut to the specified torque.
  • Follow the tightening sequence or pattern specified in the service manual.
  • Recheck the tightness of the bolt or nut after tightening.
View full procedure

Brake Component Bolt Tightening Specifications

Specific instructions with torque values for brake calipers, rotors, and pads.

  • Locate the brake component that requires torque tightening.
  • Identify the bolts or nuts that need to be torqued.
  • Refer to the torque specifications table for the corresponding torque value.
  • Tighten the bolts or nuts to the specified torque using the digital torque wrench.
  • Follow the tightening sequence or pattern as outlined in the service manual.
  • Double-check the tightness of the bolts or nuts after tightening.
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.
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About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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