Infiniti Vehicle Models FX45 2003-2008 Torque Specifications
Infiniti Vehicle Models FX45 2003-2008

Infiniti Vehicle Models FX45 2003-2008 Torque Specifications

Complete Infiniti Vehicle Models FX45 2003-2008 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

M14 x 1.5
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 23-28 ft-lbs).

Main Bearings

1

Main Bearing Bolts

M16 x 1.5
Torque Specification
82.5 ft-lbs (111.75 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 80-85 ft-lbs).

Connecting Rods

1

Connecting Rod Nuts

M10 x 1.25
Torque Specification
31 ft-lbs (42.2 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 29-33 ft-lbs).

Flywheel

1

Flywheel Bolts

M14 x 1.5
Torque Specification
78 ft-lbs (105.7 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 74-82 ft-lbs).

Valvetrain

1

Valve Cover Bolts

M8 x 1.25
Torque Specification
5 ft-lbs (6.8 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 4-6 ft-lbs).
2

Rocker Arms/Shafts Bolts

M12 x 1.25
Torque Specification
20 ft-lbs (27.1 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 18-22 ft-lbs).

Timing Drive

1

Timing Belt/Chain Tensioner Bolt

M14 x 1.5
Torque Specification
35.5 ft-lbs (48.2 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 33-38 ft-lbs).
2

Camshaft Sprocket Bolt

M16 x 1.5
Torque Specification
55 ft-lbs (74.6 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 52-58 ft-lbs).

Intake and Exhaust

1

Intake Manifold Bolts

M12 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 16-18 ft-lbs).
2

Exhaust Manifold/Headers Bolts

M14 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 26-30 ft-lbs).

Spark Plugs

1

Spark Plugs

N/A
Torque Specification
14.5 ft-lbs (19.7 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 13-16 ft-lbs).

Engine Block and Oil System

1

Oil Pan Bolts

M10 x 1.25
Torque Specification
10 ft-lbs (13.6 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 9-11 ft-lbs).
2

Water Pump Bolts

M10 x 1.25
Torque Specification
20 ft-lbs (27.1 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 18-22 ft-lbs).

Engine Mounting

1

Engine Block to Transmission Mounting Bolts

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Values are estimated based on general engine assembly practices.

4.5l V8 Engine

Torque specifications for 4.5L-V8 Engine

Cylinder Head

1

Cylinder Head Bolts

M14 x 1.5
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 23-28 ft-lbs).

Main Bearings

1

Main Bearing Bolts

M16 x 1.5
Torque Specification
82.5 ft-lbs (111.75 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 80-85 ft-lbs).

Connecting Rods

1

Connecting Rod Nuts

M10 x 1.25
Torque Specification
31 ft-lbs (42.2 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 29-33 ft-lbs).

Flywheel

1

Flywheel Bolts

M14 x 1.5
Torque Specification
78 ft-lbs (105.7 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 74-82 ft-lbs).

Valvetrain

1

Valve Cover Bolts

M8 x 1.25
Torque Specification
5 ft-lbs (6.8 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 4-6 ft-lbs).
2

Rocker Arms/Shafts Bolts

M12 x 1.25
Torque Specification
20 ft-lbs (27.1 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 18-22 ft-lbs).

Timing Drive

1

Timing Belt/Chain Tensioner Bolt

M14 x 1.5
Torque Specification
35.5 ft-lbs (48.2 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 33-38 ft-lbs).
2

Camshaft Sprocket Bolt

M16 x 1.5
Torque Specification
55 ft-lbs (74.6 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 52-58 ft-lbs).

Intake and Exhaust

1

Intake Manifold Bolts

M12 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 16-18 ft-lbs).
2

Exhaust Manifold/Headers Bolts

M14 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 26-30 ft-lbs).

Spark Plugs

1

Spark Plugs

N/A
Torque Specification
14.5 ft-lbs (19.7 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 13-16 ft-lbs).

Engine Block and Oil System

1

Oil Pan Bolts

M10 x 1.25
Torque Specification
10 ft-lbs (13.6 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 9-11 ft-lbs).
2

Water Pump Bolts

M10 x 1.25
Torque Specification
20 ft-lbs (27.1 N·m)
Important Notes
Values are estimated based on similar components and bolt sizes (original values were 18-22 ft-lbs).

Engine Mounting

1

Engine Block to Transmission Mounting Bolts

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Values are estimated based on general engine assembly practices.

5r05 Transmission

Torque specifications for 5r05 Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
36.5 ft-lbs (49.5 N·m)
Important Notes
Estimated average value from the given range.

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M10 x 1.25
Torque Specification
10 ft-lbs (13.5 N·m)
Important Notes
Estimated average value from the given range.

Transmission Fluid System

1

Transmission Drain and Fill Plugs

M14 x 1.5
Torque Specification
31 ft-lbs (42 N·m)
Important Notes
Estimated average value from the given range.
2

Transmission Fluid Drain/Fill Plug

M14 x 1.5
Torque Specification
31 ft-lbs (42 N·m)
Important Notes
Estimated average value from the given range.

Transmission Case

1

Transmission Case Bolts (Upper and Lower)

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average value from the given range.

Valve Body and Pump

1

Valve Body Bolts

M10 x 1.25
Torque Specification
17.5 ft-lbs (23.75 N·m)
Important Notes
Estimated average value from the given range.
2

Pump Bolts (Transmission Pump)

M12 x 1.5
Torque Specification
35 ft-lbs (47.5 N·m)
Important Notes
Estimated average value from the given range.

Torque Converter and Cooler Lines

1

Torque Converter Bolts

M12 x 1.5
Torque Specification
35 ft-lbs (47.5 N·m)
Important Notes
Estimated average value from the given range.
2

Transmission Cooler Line Fittings

M10 x 1.25
Torque Specification
25 ft-lbs (33.75 N·m)
Important Notes
Estimated average value from the given range.

Body

Torque specifications for Body

Suspension

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
36.5 ft-lbs (49.5 N·m)
Important Notes
Estimated average value from 33-40 ft-lbs range.
2

Control Arm Bolts

M16 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Estimated average value from 85-95 ft-lbs range.
3

Ball Joint Nut

M14 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Estimated average value from 85-95 ft-lbs range.
4

Tie Rod End Nut

M12 x 1.25
Torque Specification
47 ft-lbs (64 N·m)
Important Notes
Estimated average value from 43-51 ft-lbs range.
5

Sway Bar Link Nut

M10 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Estimated average value from 33-41 ft-lbs range.

Steering

1

Steering Gear/Rack Bolts

M16 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Estimated average value from 85-95 ft-lbs range.

Body and Frame

1

Body Mount Bolts

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average value from 40-50 ft-lbs range.
2

Fender Bolts

M10 x 1.25
Torque Specification
17.5 ft-lbs (24 N·m)
Important Notes
Estimated average value from 15-20 ft-lbs range.
3

Hood Hinge Bolts

M10 x 1.25
Torque Specification
22.5 ft-lbs (31 N·m)
Important Notes
Estimated average value from 20-25 ft-lbs range.
4

Door Hinge Bolts

M10 x 1.25
Torque Specification
22.5 ft-lbs (31 N·m)
Important Notes
Estimated average value from 20-25 ft-lbs range.
5

Trunk Lid Hinge Bolts

M10 x 1.25
Torque Specification
22.5 ft-lbs (31 N·m)
Important Notes
Estimated average value from 20-25 ft-lbs range.
6

Bumper Mounting Bolts

M12 x 1.25
Torque Specification
35 ft-lbs (48 N·m)
Important Notes
Estimated average value from 30-40 ft-lbs range.

Brakes

Torque specifications for Brakes

Brake Caliper

1

Brake Caliper Bolts

M12 x 1.5
Torque Specification
82.5 ft-lbs (112 N·m)
Important Notes
Torque value is an average of the provided range (79-86 ft-lbs / 107-117 Nm).
2

Brake Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Torque value is an average of the provided range (85-95 ft-lbs / 115-129 Nm).

Brake Rotor Drum

1

Brake Disc/Drum Retaining Bolts

M10 x 1.25
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Torque value is an average of the provided range (45-55 ft-lbs / 61-74 Nm).

Brake Hydraulics

1

Brake Hose Banjo Bolt

M10 x 1.0
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Torque value is an average of the provided range (16-22 ft-lbs / 22-30 Nm).
2

Brake Master Cylinder Mounting Bolts

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Torque value is an average of the provided range (12-16 ft-lbs / 16-22 Nm).

Brake Pedal

1

Brake Pedal Assembly Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque value is an average of the provided range (18-22 ft-lbs / 25-30 Nm).

Abs System

1

ABS Sensor Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Torque value is an average of the provided range (7-9 ft-lbs / 10-12 Nm).

Wheel Assembly

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
85 ft-lbs (115 N·m)
Important Notes
Torque value is an average of the provided range (80-90 ft-lbs / 108-122 Nm).

Drivetrain

Torque specifications for Drivetrain

Engine

1

Flywheel Bolts

M12 x 1.5
Torque Specification
78 ft-lbs (106 N·m)
Important Notes
Proper torque is essential to prevent damage to the crankshaft and ensure smooth engine operation.
2

Main Bearing Bolts

M14 x 1.5
Torque Specification
82 ft-lbs (111 N·m)
Important Notes
Proper torque is critical to prevent bearing damage and ensure engine longevity.
3

Connecting Rod Nuts

M10 x 1.5
Torque Specification
31 ft-lbs (42 N·m)
Important Notes
Proper torque is necessary to prevent engine damage and ensure smooth operation.

Transmission

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Proper torque is necessary to prevent transmission damage and ensure smooth operation.
2

Transmission Oil Pan Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Proper torque is necessary to prevent oil leaks and ensure transmission longevity.

Drivetrain

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Proper torque is necessary to prevent axle damage and ensure smooth operation.
2

CV Joint/Axle Nut

M20 x 1.5
Torque Specification
203 ft-lbs (275 N·m)
Important Notes
Proper torque is essential to prevent CV joint damage and ensure smooth operation.

Differential

1

Differential Drain/Fill Plug

M12 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Proper torque is necessary to prevent fluid leaks and ensure differential longevity.
2

Differential Cover Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Proper torque is necessary to prevent fluid leaks and ensure differential longevity.

Transfer Case

1

Transfer Case Drain/Fill Plug

M12 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Proper torque is necessary to prevent fluid leaks and ensure transfer case longevity.
2

Transfer Case Mounting Bolts

M14 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Proper torque is necessary to prevent transfer case damage and ensure smooth operation.

Electrical

Torque specifications for Electrical

Alternator And Starter Motor

1

Alternator Mounting Bolts

M12 x 1.5
Torque Specification
31 ft-lbs (42 N·m)
Important Notes
Estimated average value from specified range.
2

Starter Motor Mounting Bolts

M12 x 1.5
Torque Specification
31 ft-lbs (42 N·m)
Important Notes
Estimated average value from specified range.

Battery And Electrical Connectors

1

Battery Terminal Nuts

M8 x 1.25
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated average value from specified range.
2

Fuel Injector Electrical Connector Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value based on general industry practices.
3

Spark Plug Wire Retainer Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value based on general industry practices.

Ignition Coil And Bracket

1

Ignition Coil Bracket Bolts

M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry practices.

Emissions Sensors

Torque specifications for Emissions_sensors

EGR System

1

EGR Valve Bolts

M10 x 1.5
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Torque specification is an average of the provided range.

Fuel Injection System

1

Fuel Injector Bolts

M8 x 1.25
Torque Specification
12 ft-lbs (16.5 N·m)
Important Notes
Torque specification is an average of the provided range.
2

Fuel Injector Rail Bolts

M10 x 1.5
Torque Specification
15 ft-lbs (20.5 N·m)
Important Notes
Torque specification is an average of the provided range.

Airflow Sensors

1

Mass Airflow Sensor Bolts

M6 x 1.0
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Torque specification is an estimated value.
2

Throttle Position Sensor Bolts

M6 x 1.0
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Torque specification is an estimated value.

Oxygen Sensor System

1

Oxygen Sensor Bolts

M12 x 1.5
Torque Specification
17.5 ft-lbs (23.5 N·m)
Important Notes
Torque specification is an estimated value.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold Headers

1

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.25
Torque Specification
26 ft-lbs (35 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
26 ft-lbs (35 N·m)
Important Notes
Ensure gasket is properly seated before tightening.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure gasket is in good condition before installation.

Muffler

1

Muffler to Exhaust Pipe Bolts

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

Exhaust Hangers

1

Exhaust Hanger Bolts

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Estimated value based on typical exhaust hanger bolt sizes.

Oxygen Sensor

1

Oxygen Sensor (O2 Sensor)

M18 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure sensor is properly seated before tightening.

Exhaust Flanges

1

Exhaust Flange Bolts

M10 x 1.25
Torque Specification
26 ft-lbs (35 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
14 ft-lbs (19 N·m)
Important Notes
Torque values are based on typical M8 bolts. Ensure proper sequence to avoid warping the fuel rail.
2

Fuel Injector Bolts

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Torque values are based on typical M6 bolts. Ensure injectors are seated properly before tightening.
3

Fuel Pump Mounting Bolts

M10 x 1.5
Torque Specification
23 ft-lbs (31 N·m)
Important Notes
Torque values are based on typical M10 bolts. Ensure the fuel pump is properly seated before tightening.

Fuel Tank System

1

Fuel Tank Strap Bolts

M12 x 1.75
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Torque values are based on typical M12 bolts. Ensure straps are evenly tightened to avoid tank deformation.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
7.5 ft-lbs (10 N·m)
Important Notes
Torque values are based on typical M6 bolts. Ensure a proper seal to prevent fuel vapor leaks.
3

Fuel Tank Sender Unit Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Torque values are based on typical M6 bolts. Ensure sender unit is properly seated before tightening.

Fuel Filtration System

1

Fuel Filter Bolt/Nut

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Torque values are based on typical M10 bolts. Ensure proper sealing to prevent fuel leaks.

Fuel Pressure Regulation System

1

Fuel Pressure Regulator Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Torque values are based on typical M6 bolts. Ensure proper sealing to maintain fuel pressure.
2

Fuel Line Fittings

M10 x 1.5
Torque Specification
23 ft-lbs (31 N·m)
Important Notes
Torque values are based on typical M10 bolts. Ensure proper sealing to prevent fuel leaks.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute load.

Ac Lines

1

A/C Line Fittings

M10 x 1.25
Torque Specification
23 ft-lbs (31 N·m)
Important Notes
Estimated value based on typical A/C line fitting torque specifications.

Evaporator Housing

1

Evaporator Core Housing Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on typical evaporator housing bolt torque specifications.

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 typical blower motor bolt torque specifications.

Heater Core

1

Heater Core Inlet/Outlet Fittings

M8 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Estimated value based on typical heater core fitting torque specifications.

Hvac Case

1

HVAC Case Assembly Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value based on typical HVAC case bolt torque specifications.

Suspension

Torque specifications for Suspension

Front Suspension

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
36.5 ft-lbs (49.5 N·m)
Important Notes
Estimated average value from specified range.
2

Control Arm Bolts

M16 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Estimated average value from specified range.
3

Upper Control Arm Bushing Bolts

M12 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value based on general industry standards.
4

Lower Control Arm Bushing Bolts

M12 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value based on general industry standards.

Steering System

1

Tie Rod End Nut

M14 x 1.5
Torque Specification
47 ft-lbs (64 N·m)
Important Notes
Estimated average value from specified range.
2

Steering Knuckle Bolts

M16 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Estimated value based on general industry standards.
3

Hub Bearing Bolts

M14 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Estimated value based on general industry standards.

Stabilizer System

1

Sway Bar Link Nut

M12 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Estimated average value from specified range.

Troubleshooting Guide

Common issues, diagnostic steps, and prevention guidelines

Common Issues

Bolt stretching, stripped threads, uneven torque patterns

Loose Components

Symptoms:
  • Rattling or vibration noises
  • Visible movement in components
  • Uneven panel gaps
Solutions:
  • Clean threads and mounting surfaces
  • Replace damaged fasteners
  • Apply proper torque in sequence
  • Use thread locker if specified

Stripped Fasteners

Symptoms:
  • Unable to achieve proper torque
  • Fastener spins freely
  • Visible thread damage
Solutions:
  • Use thread repair kit if appropriate
  • Install thread insert (HeliCoil)
  • Replace component if threaded hole is damaged
  • Upgrade to higher grade fastener if recommended

Overtightened Components

Symptoms:
  • Cracked or deformed parts
  • Broken fasteners
  • Compressed gaskets or seals
Solutions:
  • Replace damaged components
  • Use new fasteners
  • Follow proper torque sequence
  • Verify correct torque specifications

Diagnostic Steps

Visual inspection, torque verification, thread assessment

1

Visual Inspection

Inspect the affected area for any visible signs of damage or wear

  • Check for cracks or deformation
  • Look for signs of excessive wear
  • Verify proper fastener installation
2

Torque Verification

Verify the torque applied to the fasteners

  • Check the torque wrench calibration
  • Verify the torque specification
  • Compare the applied torque to the specification
3

Thread Assessment

Assess the condition of the threads

  • Check for signs of thread damage
  • Verify the thread type and size
  • Check for proper thread engagement

Prevention Guidelines

Best practices, maintenance tips, tool care

Best Practices

  • Always follow the recommended torque specification
  • Use the correct type and size of fasteners
  • Verify the torque wrench calibration regularly

Maintenance Tips

  • Regularly inspect the affected area for signs of wear or damage
  • Replace damaged or worn-out components promptly
  • Keep the work area clean and organized

Tool Care

  • Regularly clean and maintain the torque wrench
  • Store the torque wrench in a dry and secure location
  • Verify the torque wrench calibration before each use

Frequently Asked Questions

Find answers to common questions about torque specifications

Q1

What IS the recommended torque specification for the lug nuts on a 2003-2008 Infiniti FX45?

The recommended torque specification for the lug nuts on a 2003-2008 Infiniti FX45 IS 83 ft-lbs (112 Nm).

Q2

What type of torque wrench should I use to tighten the lug nuts on my FX45?

It IS recommended to use a high-quality, calibrated torque wrench with a range that covers the recommended torque specification. Avoid using impact wrenches as they can over-tighten the lug nuts.

Q3

How often should I check the torque on the lug nuts of my FX45?

It IS advisable to check the torque on the lug nuts after every tire rotation or if any work has been done on the wheels or brakes. Loose lug nuts can compromise vehicle safety.

Q4

Can I use anti-seize compound on the bolts and studs when assembling or disassembling components?

Yes, applying a light coating of high-temperature anti-seize compound to clean bolt threads and mating surfaces can prevent corrosion and aid in future disassembly.

Q5

What are the torque specifications for the spark plugs on a 2003-2008 Infiniti FX45?

The recommended torque specification for the spark plugs on a 2003-2008 Infiniti FX45 IS 15 ft-lbs (20 Nm).

Q6

IS it necessary to use a torque wrench when tightening suspension bolts?

Yes, it IS crucial to use a torque wrench when tightening suspension bolts. Over-tightening can lead to component damage, while under-tightening can compromise vehicle handling and safety.

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 (10-200 Nm)

Ideal for tightening bolts on larger components such as the engine or suspension system, providing accurate torque application.

  • High torque capacity for heavy-duty applications
  • Precision settings for various bolt sizes
  • Digital display for easy readability
  • Reversible mechanism for both tightening and loosening
Learn more

Torque Multiplier

Useful for applying higher torque values, allowing technicians to achieve precise tightening without excessive effort.

  • Multiplies torque input by a specific ratio
  • Durable construction for extended use
  • Safety features to prevent over-tightening
  • Compact design for confined spaces
Learn more
Service Procedures

Engine Bolt Torque Specifications

Comprehensive guide to tightening bolts on the fx45 engine, ensuring proper assembly and performance.

  • Cylinder head bolt tightening sequence
  • Camshaft bolt torque values
  • Timing chain tensioner bolt specifications
  • Oil pan bolt tightening procedure
View full procedure

Suspension Bolt Torque Specifications

Technical overview of torque specifications for various suspension components on the fx45.

  • Control arm mounting bolts
  • Strut bolts and alignment settings
  • Sway bar link nuts and end link bolts
  • Wheel lug nut torque sequence
View full procedure
Technical Service Bulletins

Engine Bolt Over-Tightening Service Bulletin

2004-06-15

Important service bulletin addressing over-tightening of engine bolts, including updated torque specifications.

2003-2004 fx45

Resolution: Revised torque values and tightening procedures for specific engine components to prevent damage.

Torque Specification Update for Rear Suspension Components

2007-03-22

Technical bulletin detailing modifications to torque specifications for rear suspension components.

2005-2008 fx45

Resolution: Updated torque values for control arms, trailing arms, and suspension links to improve alignment and handling.

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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.
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About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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