Infiniti Vehicle Models G20 1999-2002 Torque Specifications
Infiniti Vehicle Models G20 1999-2002

Infiniti Vehicle Models G20 1999-2002 Torque Specifications

Complete Infiniti Vehicle Models G20 1999-2002 torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.

Updated

Important Information

Safety guidelines and reference information for proper torque application

Quick Reference Guide
ft-lbs → Nm
× 1.356
ft-lbs → kg-m
× 0.138
Nm → ft-lbs
× 0.738
in-lbs → ft-lbs
× 0.083

Common Torque Patterns

Star Pattern

Used for wheels and other circular bolt patterns

Star Pattern torque pattern diagram showing proper bolt tightening sequence
Cross Pattern

Used for gaskets and cover plates

Cross Pattern torque pattern diagram showing proper bolt tightening sequence
Sequential Pattern

Used for head bolts and other critical components

Sequential Pattern torque pattern diagram showing proper bolt tightening sequence

Common Mistakes to Avoid

Over-tightening

Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.

Prevention:

Always use a calibrated torque wrench and follow specifications exactly.

Incorrect Torque Sequence

Tightening bolts in the wrong order can cause uneven pressure distribution and potential leaks or damage.

Prevention:

Follow the manufacturer's specified torque sequence pattern.

Dirty Threads

Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.

Prevention:

Clean and inspect all threads before assembly. Use new thread locker if specified.

Reusing TTY Bolts

Torque-to-yield bolts are designed to stretch and must not be reused.

Prevention:

Always replace TTY bolts with new ones. They are single-use only.

Dry vs. Lubricated

Not accounting for whether torque specs are for dry or lubricated fasteners can lead to incorrect tension.

Prevention:

Check if specs are for dry or lubricated threads. Use specified lubricant when required.

Recommended Tools

Torque Wrench (1/4" Drive)

Range: 2-25 ft-lbs
Small fasteners, delicate components

Torque Wrench (3/8" Drive)

Range: 10-100 ft-lbs
Most common automotive fasteners

Torque Wrench (1/2" Drive)

Range: 30-250 ft-lbs
Large fasteners, wheels

Angle Gauge

Torque-to-yield (TTY) bolts

Torque Wrench Care

  • Calibrate annually or after 5,000 clicks
  • Store at lowest setting
  • Keep clean and lubricated

Search Specifications

Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

2.0l I4 Engine

Torque specifications for 2.0L-I4 Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.25
Torque Specification
1. 23 ft-lbs (31 N·m) 2. 29 ft-lbs (39 N·m)
Important Notes
Follow the manufacturer's specified torque sequence to ensure even clamping force.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
4 ft-lbs (5 N·m)
Important Notes
Avoid over-tightening to prevent damage to the valve cover gasket.
3

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.

Crankshaft And Bearings

1

Main Bearing Bolts

M12 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Follow the specified torque sequence to ensure proper crankshaft alignment.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper alignment of connecting rods before tightening.
3

Flywheel Bolts

M10 x 1.25
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Use thread locker on flywheel bolts to prevent loosening.

Timing System

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
39 ft-lbs (53 N·m)
Important Notes
Ensure proper tension on the timing belt/chain before tightening.
2

Camshaft Sprocket Bolt

M10 x 1.25
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure proper alignment of the camshaft sprocket before tightening.

Oil System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Avoid over-tightening to prevent damage to the oil pan gasket.
2

Oil Drain Plug Bolt

M14 x 1.5
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Replace the crush washer to ensure a proper seal.

4r01 Transmission

Torque specifications for 4r01 Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Estimated value, consult manufacturer's documentation for specific guidance.

Transmission Oil System

1

Transmission Oil Pan Bolts

M8 x 1.25
Torque Specification
5 ft-lbs (6.8 N·m)
2

Transmission Drain and Fill Plugs

M14 x 1.5
Torque Specification
30.5 ft-lbs (41.4 N·m)

Transmission Case and Bellhousing

1

Transmission Case Bolts (upper and lower)

M14 x 1.5
Torque Specification
37 ft-lbs (50.2 N·m)
Important Notes
Estimated value, consult manufacturer's documentation for specific guidance.
2

Bellhousing Bolts

M12 x 1.5
Torque Specification
33 ft-lbs (44.8 N·m)
Important Notes
Estimated value, consult manufacturer's documentation for specific guidance.

Output Shaft and Torque Converter

1

Output Shaft Bolts (front and rear)

M12 x 1.5
Torque Specification
31 ft-lbs (42 N·m)
Important Notes
Estimated value, consult manufacturer's documentation for specific guidance.
2

Torque Converter Bolts

M14 x 1.5
Torque Specification
43 ft-lbs (58.3 N·m)
Important Notes
Estimated value, consult manufacturer's documentation for specific guidance.

Transmission Filter

1

Transmission Filter Bolts

M8 x 1.25
Torque Specification
12 ft-lbs (16.3 N·m)

Body

Torque specifications for Body

Suspension System

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
47 ft-lbs (64 N·m)
Important Notes
Proper torque is essential to ensure a secure and stable suspension system.
2

Control Arm Bolts

M14 x 1.5
Torque Specification
47 ft-lbs (64 N·m)
Important Notes
Proper torque ensures the control arms are securely attached to the vehicle's frame.
3

Ball Joint Nut

M16 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Correct torque ensures the ball joint is properly seated and secured.
4

Tie Rod End Nut

M12 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Proper torque ensures the tie rod end is securely attached to the steering rack.
5

Sway Bar Link Nut

M12 x 1.25
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Correct torque ensures the sway bar link is securely attached to the vehicle's frame and suspension components.

Body And Frame

1

Body Mount Bolts

M16 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Proper torque ensures the vehicle's body is securely attached to the frame.
2

Front Bumper Mounting Bolts

M12 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Proper torque ensures the front bumper is securely attached to the vehicle's frame.
3

Rear Bumper Mounting Bolts

M12 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Proper torque ensures the rear bumper is securely attached to the vehicle's frame.
4

Hood Hinge Bolts

M10 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Proper torque ensures the hood hinges are securely attached to the vehicle's body.
5

Trunk Lid Hinge Bolts

M10 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Proper torque ensures the trunk lid hinges are securely attached to the vehicle's body.
6

Door Hinge Bolts

M10 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Proper torque ensures the door hinges are securely attached to the vehicle's body.

Fuel System

1

Fuel Tank Strap Bolts

M12 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Proper torque ensures the fuel tank is securely attached to the vehicle's floor pan.
2

Fuel Filler Neck Bolts

M10 x 1.25
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Proper torque ensures the fuel filler neck is securely attached to the vehicle's body.

Brakes

Torque specifications for Brakes

Brake Caliper

1

Brake Caliper Bolts

M10 x 1.25
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Torque value is the midpoint of the provided range. Ensure bolts are tightened in a crisscross pattern.
2

Brake Caliper Mounting Bracket Bolts

M12 x 1.5
Torque Specification
78 ft-lbs (105 N·m)
Important Notes
Torque value is the midpoint of the provided range. Ensure proper alignment of the bracket.

Brake Rotor Drum

1

Brake Disc/Drum Retaining Bolts

M12 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Torque value is the midpoint of the provided range. Ensure the rotor or drum is seated properly before tightening.

Brake Hydraulics

1

Brake Hose Banjo Bolt

M10 x 1.0
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Torque value is the midpoint of the provided range. 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
Torque value is the midpoint of the provided range. Ensure proper alignment with the brake booster.

Brake Pedal Assembly

1

Brake Pedal Assembly Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Torque value is the midpoint of the provided range. Ensure proper pedal alignment and free movement.

Abs Module

1

ABS Module Mounting Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Torque value is the midpoint of the provided range. Ensure proper alignment and secure mounting.

Wheel Assembly

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Torque value is the midpoint of the provided range. Always tighten in a star pattern.

Drivetrain

Torque specifications for Drivetrain

Engine

1

Flywheel Bolts

M12 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Proper torque ensures the flywheel is securely attached to the crankshaft.
2

Main Bearing Bolts

M14 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Proper torque ensures the main bearings are securely seated and the crankshaft is properly aligned.
3

Connecting Rod Nuts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Proper torque ensures the connecting rods are properly seated and the engine runs smoothly.

Transmission

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Proper torque ensures the transmission is properly aligned and supported.
2

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Proper torque ensures the axles are properly seated and the drivetrain runs smoothly.

Drivetrain

1

CV Joint/Axle Nut

M16 x 1.5
Torque Specification
166 ft-lbs (225 N·m)
Important Notes
Proper torque ensures the CV joint is properly seated and the drivetrain runs smoothly.
2

Propeller/Drive Shaft Bolts

M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Proper torque ensures the propeller shaft is properly seated and the drivetrain runs smoothly.
3

Differential Cover Bolts

M12 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value. Proper torque ensures the differential cover is properly seated and the differential is sealed.

Electrical

Torque specifications for Electrical

Electrical System Mounting

1

Alternator Mounting Bolts

M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Estimated torque value based on similar components.
2

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Estimated torque value based on similar components.

Electrical Connectors

1

Battery Terminal Nuts

M8 x 1.25
Torque Specification
6 ft-lbs (8 N·m)
2

Ignition Coil Bolt

M6 x 1.0
Torque Specification
5 ft-lbs (7 N·m)
3

Spark Plug Wire Retainer Bolts

M6 x 1.0
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Estimated torque value based on general industry practices.
4

Fuel Injector Electrical Connector Bolts

M5 x 0.8
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Estimated torque value based on general industry practices.
5

Oxygen Sensor Electrical Connector Bolts

M5 x 0.8
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Estimated torque value based on general industry practices.

Emissions Sensors

Torque specifications for Emissions_sensors

Egr System

1

EGR Valve Bolts

M8 x 1.25
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Torque value is based on typical M8 bolt specifications for EGR systems.

Exhaust Manifold

1

Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Torque value is based on typical M10 bolt specifications for exhaust manifolds.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Torque value is based on typical M10 bolt specifications for exhaust manifolds.

Exhaust Pipe

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Torque value is based on typical M10 bolt specifications for exhaust systems.
2

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Torque value is based on typical M10 bolt specifications for exhaust systems.

Oxygen Sensor

1

Oxygen Sensor (O2 Sensor)

M18 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Torque value is estimated based on typical M18 bolt specifications for oxygen sensors.

Secondary Air Injection

1

Secondary Air Injection System Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Torque value is estimated based on typical M8 bolt specifications for air injection systems.

Evap System

1

EVAP Canister Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Torque value is estimated based on typical M6 bolt specifications for EVAP systems.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold Headers

1

Exhaust Manifold/Headers to Engine Block Bolts

M12 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Estimated average torque value for M12 x 1.5 bolts.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M12 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Estimated average torque value for M12 x 1.5 bolts.

Exhaust Pipe

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M12 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Estimated average torque value for M12 x 1.5 bolts.
2

Exhaust Pipe Flange Bolts

M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated average torque value for M10 x 1.25 bolts.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M12 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Estimated average torque value for M12 x 1.5 bolts.

Muffler

1

Muffler to Exhaust Pipe Bolts

M12 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Estimated average torque value for M12 x 1.5 bolts.

Oxygen Sensor

1

Oxygen Sensor Bolts

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated average torque value for M8 x 1.25 bolts.

Exhaust System Mounting

1

Exhaust System Mounting Bolts

M14 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated average torque value for M14 x 1.5 bolts.

Heat Shield

1

Heat Shield Bolts

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated average torque value for M6 x 1.0 bolts.

Fuel

Torque specifications for Fuel

Fuel Delivery 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
9 ft-lbs (12 N·m)
Important Notes
Over-tightening can damage the injector seals.
3

Fuel Pump Mounting Bolts

M10 x 1.5
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Ensure the fuel pump gasket is properly seated before tightening.

Fuel Tank System

1

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Ensure the tank is properly aligned before tightening.
2

Fuel Filler Neck Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure the filler neck gasket is properly seated.
3

Fuel Tank Sender Unit Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Estimated value based on similar components. Ensure the sender unit is properly aligned.

Fuel Filtration System

1

Fuel Filter Bolt/Nut

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

Fuel Pressure Regulation System

1

Fuel Pressure Regulator Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Estimated value based on similar components. Ensure the regulator is properly aligned.
2

Fuel Line Fittings

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure fittings are properly aligned and seated before tightening.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure the compressor is properly aligned before tightening.
2

A/C Line Fittings

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure fittings are clean and free of debris before assembly.

Evaporator

1

Evaporator Housing Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Estimated value based on similar M6 bolts in HVAC systems.

Blower Motor

1

Blower Motor Mounting Bolts

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Estimated value based on similar M5 bolts in HVAC systems.

Heater Core

1

Heater Core Inlet/Outlet Fittings

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Estimated value based on similar M6 fittings in HVAC systems.

Condenser

1

Condenser Mounting Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Ensure the condenser is properly aligned before tightening.

Control Panel

1

HVAC Control Panel Mounting Screws

M4 x 0.7
Torque Specification
3 ft-lbs (4 N·m)
Important Notes
Estimated value based on similar M4 screws in HVAC systems.

Suspension

Torque specifications for Suspension

Front Suspension

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
52.5 ft-lbs (71 N·m)
Important Notes
Estimated average value from the provided range.
2

Control Arm Bolts

M14 x 1.5
Torque Specification
52.5 ft-lbs (71 N·m)
Important Notes
Estimated average value from the provided range.
3

Upper Control Arm Bushing Bolts

M10 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average value from the provided range.
4

Lower Control Arm Bushing Bolts

M10 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average value from the provided range.
5

Ball Joint Nut

M16 x 1.5
Torque Specification
39 ft-lbs (53 N·m)
Important Notes
Estimated average value from the provided range.

Steering System

1

Steering Gear/Rack Mounting Bolts

M12 x 1.25
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Estimated average value from the provided range.
2

Tie Rod End Nut

M14 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Estimated average value from the provided range.

Brake System

1

Brake Caliper Bolts

M10 x 1.25
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Estimated average value from the provided range.
2

Brake Caliper Mounting Bracket Bolts

M12 x 1.25
Torque Specification
77.5 ft-lbs (105 N·m)
Important Notes
Estimated average value from the provided range.
3

Wheel Lug Nuts

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

Stabilizer Bar

1

Stabilizer Bar Mounting Bolts

M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated average value from the provided range.
2

Sway Bar Link Nut

M14 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Estimated average value from the provided 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 crankshaft pulley bolt on a 1999-2002 Infiniti g20?

According to Infiniti technical specifications, the torque for the crankshaft pulley bolt on a 1999-2002 Infiniti g20 IS 129 ft-lbs (175 Nm).

Q2

What IS the proper tightening procedure for the cylinder head bolts on a 2001 Infiniti g20?

The cylinder head bolts on a 2001 Infiniti g20 require a multi-step tightening procedure. First, tighten the bolts to 29 ft-lbs (39 Nm) in the specified sequence. Then, retorque the bolts to 58 ft-lbs (79 Nm). Finally, perform a third and final tightening to 67 ft-lbs (91 Nm) plus an additional 90 degrees of rotation.

Q3

Can I use an impact wrench to tighten suspension bolts on my Infiniti g20?

It IS generally not recommended to use an impact wrench to tighten suspension bolts. Impact wrenches can apply excessive torque, potentially damaging the bolts or surrounding components. Use a calibrated torque wrench to ensure proper bolt tension.

Q4

What IS the torque specification for the spark plugs on a 2002 g20?

The torque specification for the spark plugs on a 2002 Infiniti g20 IS 18 ft-lbs (24 Nm).

Q5

How often should I check the torque on the wheel lug nuts of my g20?

It IS advisable to check the torque on the wheel lug nuts of your Infiniti g20 every 6 months or 6,000 miles, whichever comes first. This helps prevent the lug nuts from loosening, ensuring proper wheel attachment.

Q6

What IS the recommended torque for the brake caliper bolts on a 1999 Infiniti g20?

The torque for the brake caliper bolts on a 1999 Infiniti g20 IS 59 ft-lbs (80 Nm) for the front calipers and 47 ft-lbs (64 Nm) for the rear calipers.

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 g20.

  • 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

Infiniti g20 Bolt Torque Specifications

Step-by-step guide to tightening bolts to specified torques for various components on the 1999-2002 g20.

  • Locate the component and identify the bolts to be tightened.
  • Refer to the torque specifications table for the appropriate torque value.
  • Set the digital torque wrench to the desired torque value.
  • Tighten the bolt to the specified torque in a clockwise direction.
  • Double-check the torque to ensure it IS within the specified range.
View full procedure
Technical Service Bulletins

TSB-01-028: Revised Torque Specifications for Cylinder Head Bolts

2001-07-01

Updated torque specifications for cylinder head bolts to address potential thread stripping issues.

1999-2002 g20

Resolution: Inspect and re-torque cylinder head bolts to the revised specifications provided in the bulletin.

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Technical Information
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About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

Automotive Technical Specialist

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