Infiniti Vehicle Models Q45 2002-2006 Torque Specifications
Infiniti Vehicle Models Q45 2002-2006

Infiniti Vehicle Models Q45 2002-2006 Torque Specifications

Complete Infiniti Vehicle Models Q45 2002-2006 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

4.5l Engine

Torque specifications for 4.5L Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.25
Torque Specification
1. 26 ft-lbs (35 N·m) 2. 33 ft-lbs (45 N·m)
Important Notes
Follow the manufacturer's torque sequence to avoid warping the cylinder head.
2

Valve Cover Bolts

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

Crankshaft And Bearings

1

Main Bearing Bolts

M10 x 1.25
Torque Specification
41 ft-lbs (56 N·m)
Important Notes
Follow the manufacturer's torque sequence to ensure proper crankshaft alignment.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
31 ft-lbs (42 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
33 ft-lbs (45 N·m)
Important Notes
Ensure the tensioner is properly aligned before tightening.
2

Camshaft Sprocket Bolt

M10 x 1.25
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Ensure the camshaft is properly aligned with the timing marks.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Follow the manufacturer's torque sequence to ensure a proper seal.
2

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
29.5 ft-lbs (40 N·m)
Important Notes
Ensure the exhaust manifold gasket is properly seated before tightening.

4.5l V8 Engine

Torque specifications for 4.5L-V8 Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.25
Torque Specification
1. 26 ft-lbs (35 N·m) 2. 33 ft-lbs (45 N·m)
Important Notes
Follow the manufacturer's torque sequence to avoid warping the cylinder head.
2

Valve Cover Bolts

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

Crankshaft And Bearings

1

Main Bearing Bolts

M10 x 1.25
Torque Specification
41 ft-lbs (56 N·m)
Important Notes
Follow the manufacturer's torque sequence to ensure proper crankshaft alignment.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
31 ft-lbs (42 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
33 ft-lbs (45 N·m)
Important Notes
Ensure the tensioner is properly aligned before tightening.
2

Camshaft Sprocket Bolt

M10 x 1.25
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Ensure the camshaft is properly aligned with the timing marks.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Follow the manufacturer's torque sequence to ensure a proper seal.
2

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
29.5 ft-lbs (40 N·m)
Important Notes
Ensure the exhaust manifold gasket is properly seated before tightening.

5r05 Transmission

Torque specifications for 5r05 Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value based on similar components. Actual value may vary depending on the specific application and transmission configuration.

Transmission Case

1

Transmission Case Bolts

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value based on similar components. Actual value may vary depending on the specific application and transmission configuration.

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M10 x 1.5
Torque Specification
88 ft-lbs (10 N·m)

Transmission Fluid Drain and Fill

1

Transmission Fluid Drain and Fill Plugs

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

Bearing Retainers

1

Input Shaft Bearing Retainer Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value based on similar components. Actual value may vary depending on the specific application and transmission configuration.
2

Output Shaft Bearing Retainer Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value based on similar components. Actual value may vary depending on the specific application and transmission configuration.

Torque Converter

1

Torque Converter Bolts

M12 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value based on similar components. Actual value may vary depending on the specific application and transmission configuration.

Body

Torque specifications for Body

Fuel System

1

Fuel Tank Strap Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure the fuel tank is securely mounted to prevent leaks or movement.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure a secure connection to prevent fuel leaks or misalignment.

Electrical System

1

Battery Terminal Nuts

M6 x 1.0
Torque Specification
7.5 ft-lbs (10 N·m)
Important Notes
Ensure a reliable electrical connection and prevent corrosion.

Body Panels

1

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

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value based on general automotive standards. Ensure proper alignment and prevent rattling.
2

Seat Mounting Bolts

M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on general automotive standards. Critical for passenger safety.
3

Bumper Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value based on general automotive standards. Ensure secure attachment and alignment.
4

Radiator Support Bolts

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value based on general automotive standards. Ensure proper alignment and prevent vibration.
5

Door Striker Bolts

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value based on general automotive standards. Ensure proper door alignment.
6

Hood Latch Bolts

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value based on general automotive standards. Ensure the hood closes securely.
7

Trunk Latch Bolts

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value based on general automotive standards. Ensure the trunk closes securely.

Brakes

Torque specifications for Brakes

Brake Caliper and Mounting

1

Brake Caliper Bolts

M12 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Estimated average torque value from the given range.
2

Brake Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
91 ft-lbs (124 N·m)
Important Notes
Estimated average torque value from the given range.

Brake Disc/Drum and Wheel

1

Brake Disc/Drum Retaining Bolts

M10 x 1.25
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Estimated average torque value from the given range.
2

Wheel Lug Nuts

M14 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Estimated average torque value from the given range.

Master Cylinder and Brake Hoses

1

Master Cylinder Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated torque value, may vary depending on the specific vehicle and component manufacturer.
2

Brake Hose Banjo Bolts

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated torque value, may vary depending on the specific vehicle and component manufacturer.

ABS Sensors and Brake Rotors

1

ABS Sensor Mounting Bolts

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated torque value, may vary depending on the specific vehicle and component manufacturer.
2

Brake Rotor Mounting Bolts

M12 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated torque value, may vary depending on the specific vehicle and component manufacturer.

Drivetrain

Torque specifications for Drivetrain

Engine and Transmission Interface

1

Engine Block to Transmission Bellhousing Bolts

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

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
2

Transmission Crossmember Bolts

M14 x 1.5
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Estimated value based on general industry standards.

Flywheel and Crankshaft

1

Flywheel Bolts

M10 x 1.25
Torque Specification
80 ft-lbs (108 N·m)
2

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Specification
127 ft-lbs (172 N·m)

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M8 x 1.25
Torque Specification
88 in-lbs (10 N·m)

Drive Axle and Half Shaft

1

Drive Axle/Half Shaft Bolts

M12 x 1.25
Torque Specification
65 ft-lbs (88 N·m)
2

CV Joint/Axle Nut

M18 x 1.5
Torque Specification
141 ft-lbs (191 N·m)

Propeller and Drive Shaft

1

Propeller/Drive Shaft Bolts

M14 x 1.5
Torque Specification
65 ft-lbs (88 N·m)

Differential

1

Differential Cover Bolts

M10 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value based on general industry standards.
2

Differential Drain/Fill Plug

M14 x 1.5
Torque Specification
33 ft-lbs (45 N·m)

Axle and Hub

1

Axle/Half Shaft to Hub Bolts

M14 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Estimated value based on general industry standards.

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Bolt

M6 x 1.0
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Ensure the ignition coil is properly seated before tightening.

Starting System

1

Starter Motor Mounting Bolts

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

Charging System

1

Alternator Mounting Bolts

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

Battery System

1

Battery Terminal Nuts

M6 x 1.0
Torque Specification
0.6 ft-lbs (0.8 N·m)
Important Notes
Ensure the battery terminals are clean and free of corrosion before tightening.

Grounding System

1

Ground Strap Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on similar grounding components.

Electrical Control System

1

Fuse Box Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on similar electrical components.
2

ECU Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on similar electrical components.

Sensor System

1

Sensor Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on similar sensor components.

Emissions Sensors

Torque specifications for Emissions_sensors

Egr System

1

EGR Valve Bolts

M8 x 1.25
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated value based on typical EGR valve bolt torque specifications.

Exhaust Manifold

1

Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
1. 26 ft-lbs (35 N·m) 2. 90°
Important Notes
Torque sequence is critical to ensure even clamping force.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 26 ft-lbs (35 N·m) 2. 90°
Important Notes
Torque sequence is critical to ensure even clamping force.

Exhaust Pipe

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
29.5 ft-lbs (40 N·m)
Important Notes
Estimated value based on typical exhaust pipe bolt torque specifications.
2

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
29.5 ft-lbs (40 N·m)
Important Notes
Estimated value based on typical catalytic converter bolt torque specifications.

Emissions Sensors

1

Oxygen Sensor (O2 Sensor) Mounting Bolts

M8 x 1.25
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Estimated value based on typical oxygen sensor bolt torque specifications.
2

Exhaust Gas Temperature Sensor Bolts

M6 x 1.0
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated value based on typical temperature sensor bolt torque specifications.

Heat Shield

1

Catalytic Converter Heat Shield Bolts

M6 x 1.0
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated value based on typical heat shield bolt torque specifications.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold Headers

1

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.25
Torque Specification
30 ft-lbs (40 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
30 ft-lbs (40 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
30 ft-lbs (40 N·m)
Important Notes
Ensure gasket is properly seated before tightening.

Muffler

1

Muffler to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure gasket is properly seated before tightening.

Exhaust Hangers

1

Exhaust Hanger Bolts

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value based on typical M8 bolt torque specifications.

Oxygen Sensors

1

Oxygen Sensor Bolts

M12 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the sensor is properly seated before tightening.

Exhaust Flanges

1

Exhaust Flange Bolts

M10 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure gasket is properly seated before tightening.

Fuel

Torque specifications for Fuel

Fuel Delivery System

1

Fuel Rail Bolts

M8 x 1.25
Torque Specification
12.5 ft-lbs (17 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
12.5 ft-lbs (17 N·m)
Important Notes
Ensure injectors are seated properly before tightening.
3

Fuel Pressure Regulator Bolts

M6 x 1.0
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated value based on similar M6 bolts in the fuel system.

Fuel Storage System

1

Fuel Pump Mounting Bolts

M6 x 1.0
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Ensure the pump is properly seated before tightening.
2

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Ensure straps are evenly tensioned to avoid tank deformation.
3

Fuel Tank Sender Unit Bolts

M6 x 1.0
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated value based on similar M6 bolts in the fuel system.

Fuel Evaporative System

1

Fuel Filler Neck Bolts

M10 x 1.5
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Ensure a proper seal to prevent fuel vapor leaks.
2

Fuel Evaporative Canister Bolts

M6 x 1.0
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated value based on similar M6 bolts in the fuel system.

Fuel Filtration System

1

Fuel Filter Bolt/Nut

M10 x 1.5
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Ensure a proper seal to prevent fuel leaks.

Fuel Line Connections

1

Fuel Line Fittings

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value based on similar M8 fittings in the fuel system.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M10 x 1.25
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute load.

Ac Lines

1

A/C Line Fittings

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Use a torque wrench to avoid over-tightening, which can damage the fittings.

Evaporator

1

Evaporator Core Housing Bolts

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

Blower Motor

1

Blower Motor Mounting Bolts

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

Heater Core

1

Heater Core Inlet/Outlet Fittings

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Ensure fittings are clean and free of debris before installation.

Condenser

1

Condenser Mounting Bolts

M8 x 1.25
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated value based on similar M8 bolts in HVAC systems.

Control Panel

1

HVAC Control Panel Mounting Screws

M4 x 0.7
Torque Specification
0.9 ft-lbs (1.2 N·m)
Important Notes
Use a torque screwdriver to avoid over-tightening and damaging the dashboard.

Suspension

Torque specifications for Suspension

Front Suspension

1

Control Arm Bolts

M14 x 1.5
Torque Specification
58 ft-lbs (79 N·m)
2

Ball Joint Nut

M16 x 1.5
Torque Specification
76 ft-lbs (103 N·m)
3

Tie Rod End Nut

M12 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
4

Upper Control Arm Bushing Bolts

M10 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on industry standards for similar applications.
5

Lower Control Arm Bushing Bolts

M10 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on industry standards for similar applications.

Rear Suspension

1

Control Arm Bolts

M14 x 1.5
Torque Specification
58 ft-lbs (79 N·m)
2

Ball Joint Nut

M16 x 1.5
Torque Specification
76 ft-lbs (103 N·m)
3

Tie Rod End Nut

M12 x 1.25
Torque Specification
36 ft-lbs (49 N·m)

Steering System

1

Steering Gear/Rack Bolts

M16 x 1.5
Torque Specification
76 ft-lbs (103 N·m)
2

Tie Rod End Nut

M12 x 1.25
Torque Specification
36 ft-lbs (49 N·m)

Wheel Hubs and Bearings

1

Wheel Hub/Bearing Bolts

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

Stabilizer Bar

1

Stabilizer Bar Mounting Bolts

M12 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Estimated value based on industry standards for similar applications.

Strut/Shock Absorber

1

Strut/Shock Absorber Mounting Bolts

M12 x 1.25
Torque Specification
17 ft-lbs (23 N·m)

Sway Bar Link

1

Sway Bar Link Nut

M12 x 1.25
Torque Specification
36 ft-lbs (49 N·m)

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 torque spec for the front brake caliper mounting bolts?

110 ft-lbs

Q2

What type of torque wrench IS recommended for tightening cylinder head bolts?

A click type torque wrench with a 1/2-inch drive

Q3

How do I find the torque specs for a specific component?

Refer to the Infiniti Technical Information System (TIS) or the vehicle's service manual

Q4

What IS the recommended procedure for tightening wheel lug nuts?

Star pattern, tighten to 85 ft-lbs, re-torque after 50 miles

Q5

Do I need to lubricate bolts before applying torque?

Only lubricate bolts if specified in the service manual or by Infiniti Technical Support

Q6

What are the general torque guidelines for aluminum bolts?

Apply 20-30% less torque than specified for steel bolts of the same size

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

7-in-1 Socket Wrench Set with Drive Quick-Release Ratchet

Provides essential sockets for disassembly and reassembly of various fasteners on the q45. Includes both metric and standard-sized sockets.

  • 72-tooth drive gear for precise adjustments
  • Durable chrome vanadium steel construction
  • Anti-slip handle for secure grip
  • Quick-release ratchet for efficient operation
Learn more

Torque Wrench Screwdriver Set

Designed for precise tightening of small fasteners with specific torque values. Ideal for interior components, electrical connections, and other applications.

  • Adjustable torque range from 0.1 to 8 Nm
  • Ergonomic handle for comfortable use
  • Reversible ratcheting mechanism for controlled tightening
  • Magnetic bit holder for secure attachment
Learn more
Service Procedures

Engine Bolt Torque Specifications

Covers tightening parameters for cylinder head bolts, connecting rod bolts, and other critical engine components.

  • Locate the specific engine component requiring torque adjustment.
  • Refer to the torque specification table provided in the vehicle service manual.
  • Clean the bolt threads and mating surfaces thoroughly.
  • Apply a small amount of anti-seize compound to the bolt threads (as specified).
  • Tighten the bolt to the prescribed torque value using a calibrated torque wrench.
  • Double-check the torque value to ensure accuracy.
View full procedure

Suspension Bolt Torque Specifications

Provides torque values for suspension components such as control arms, ball joints, and sway bar links.

  • Elevate the vehicle safely using a jack and jack stands.
  • Identify the suspension component requiring torque adjustment.
  • Clean the bolt threads and mating surfaces thoroughly.
  • Apply a small amount of anti-seize compound to the bolt threads (as specified).
  • Tighten the bolt to the prescribed torque value using a calibrated torque wrench.
  • Double-check the torque value to ensure accuracy.
View full procedure
Technical Service Bulletins

Technical Service Bulletin: Revised Torque Specification for Front Wheel Lug Nuts

2005-03-15

Nissan/Infiniti issued a technical bulletin updating the torque specifications for the front wheel lug nuts on the q45 to enhance wheel retention.

2002-2006 q45

Resolution: The front wheel lug nuts must be tightened to 118 Nm (87 ft-lb). This supersedes previous torque specifications.

Legal Disclaimer

Important information about using this content

Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.

General Information
The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.
Warranty & Liability

The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.

We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.

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.
Intellectual Property
All content, including text, images, and specifications, is protected by copyright and other intellectual property laws. Any unauthorized use or reproduction is prohibited.

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.

Facebook Contact
15+ Years
Experience
500+ Guides
Guides
50+ Makes
Vehicles
1000+ Solutions
Solutions

Diagnostic

Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.

Repair

Expert in both traditional mechanical repairs and modern vehicle systems.

Additional Expertise

Documentation

Created over 500 detailed repair guides and technical documents.

Training

Conducted technical training sessions and contributed to repair databases.

Certifications & Research

Certifications

  • ASE Master Technician Certification
  • Advanced Diagnostic Specialist
  • Hybrid/Electric Vehicle Systems
  • Performance Tuning Expert

Research & Community

Actively researches emerging technologies and contributes to automotive forums.

© 2025 Infiniti Specs. All rights reserved.

Privacy Policy Terms of Service