Infiniti Vehicle Models G37 2009-2013 Torque Specifications
Infiniti Vehicle Models G37 2009-2013

Infiniti Vehicle Models G37 2009-2013 Torque Specifications

Complete Infiniti Vehicle Models G37 2009-2013 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

3.7l Engine

Torque specifications for 3.7L Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 15 ft-lbs (20 N·m) 2. 22 ft-lbs (30 N·m)
Important Notes
Follow the manufacturer's torque sequence for cylinder head bolts. Ensure the engine is at room temperature during installation.
2

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Ensure rocker arms are properly aligned before tightening.

Crankshaft And Bearings

1

Main Bearing Bolts

M12 x 1.75
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Follow the manufacturer's torque sequence for main bearing bolts. Ensure proper alignment of bearings.
2

Connecting Rod Nuts

M9 x 1.0
Torque Specification
48 ft-lbs (65 N·m)
Important Notes
Ensure connecting rods are properly aligned with the crankshaft journals.

Timing System

1

Timing Chain Tensioner Bolt

M8 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure the tensioner is properly seated before tightening.
2

Camshaft Sprocket Bolt

M12 x 1.75
Torque Specification
97 ft-lbs (132 N·m)
Important Notes
Ensure the camshaft sprocket is properly aligned with the timing marks.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Follow the manufacturer's torque sequence for intake manifold bolts.
2

Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the exhaust manifold is properly aligned before tightening.

Lubrication System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.
2

Oil Drain Plug Bolt

M14 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Replace the crush washer during installation to prevent leaks.

3.7l V6 Engine

Torque specifications for 3.7L-V6 Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 15 ft-lbs (20 N·m) 2. 22 ft-lbs (30 N·m)
Important Notes
Follow the manufacturer's torque sequence for cylinder head bolts. Ensure the engine is at room temperature during installation.
2

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Ensure rocker arms are properly aligned before tightening.

Crankshaft And Bearings

1

Main Bearing Bolts

M12 x 1.75
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Follow the manufacturer's torque sequence for main bearing bolts. Ensure proper alignment of bearings.
2

Connecting Rod Nuts

M9 x 1.0
Torque Specification
48 ft-lbs (65 N·m)
Important Notes
Ensure connecting rods are properly aligned with the crankshaft journals.

Timing System

1

Timing Chain Tensioner Bolt

M8 x 1.25
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Ensure the tensioner is properly seated before tightening.
2

Camshaft Sprocket Bolt

M12 x 1.75
Torque Specification
97 ft-lbs (132 N·m)
Important Notes
Ensure the camshaft sprocket is properly aligned with the timing marks.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Follow the manufacturer's torque sequence for intake manifold bolts.
2

Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the exhaust manifold is properly aligned before tightening.

Lubrication System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.
2

Oil Drain Plug Bolt

M14 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Replace the crush washer during installation to prevent leaks.

7r01 Transmission

Torque specifications for 7r01 Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M14 x 1.5
Torque Specification
64 ft-lbs (86.5 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M10 x 1.25
Torque Specification
69.5 ft-lbs (8.5 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.

Transmission Fluid System

1

Transmission Drain and Fill Plugs

M12 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
2

Transmission Fluid Drain/Fill Plug

M12 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)

Transmission Case and Bellhousing

1

Transmission Case Bolts

M16 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.
2

Transmission Bellhousing Bolts

M14 x 1.5
Torque Specification
35 ft-lbs (47.5 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.

Transmission Cooler System

1

Transmission Cooler Line Fittings

M10 x 1.25
Torque Specification
17.5 ft-lbs (23.5 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.

Transmission Crossmember

1

Transmission Crossmember Bolts

M16 x 1.5
Torque Specification
55 ft-lbs (74.5 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.

Body

Torque specifications for Body

Suspension and Steering

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
130 ft-lbs (176 N·m)
Important Notes
Torque value range: 125-135 ft-lbs (170-183 nm)
2

Control Arm Bolts

M12 x 1.5
Torque Specification
97 ft-lbs (132 N·m)
Important Notes
Torque value range: 87-108 ft-lbs (118-147 nm)
3

Ball Joint Nut

M16 x 1.5
Torque Specification
46 ft-lbs (62 N·m)
Important Notes
Torque value range: 40-52 ft-lbs (54-70 nm)
4

Tie Rod End Nut

M14 x 1.5
Torque Specification
39 ft-lbs (53 N·m)
Important Notes
Torque value range: 36-43 ft-lbs (49-58 nm)
5

Sway Bar Link Nut

M12 x 1.5
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Torque value range: 29-36 ft-lbs (39-49 nm)
6

Steering Gear/Rack Bolts

M14 x 1.5
Torque Specification
64 ft-lbs (87 N·m)
Important Notes
Torque value range: 58-70 ft-lbs (78-95 nm)

Body and Frame

1

Body Mount Bolts

M12 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated torque value range: 40-50 ft-lbs (54-68 nm)
2

Door Hinge Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated torque value range: 20-25 ft-lbs (27-34 nm)
3

Trunk Lid Hinge Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated torque value range: 20-25 ft-lbs (27-34 nm)
4

Hood Hinge Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated torque value range: 20-25 ft-lbs (27-34 nm)

Brakes

Torque specifications for Brakes

Brake Caliper and Mounting

1

Brake Caliper Bolts

M12 x 1.5
Torque Specification
64 ft-lbs (87 N·m)
Important Notes
Torque value is an average of the specified range.
2

Brake Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
130 ft-lbs (177 N·m)
Important Notes
Torque value is an average of the specified range.

Brake Disc/Drum and Rotor

1

Brake Disc/Drum Retaining Bolts

M10 x 1.5
Torque Specification
64 ft-lbs (87 N·m)
Important Notes
Torque value is an average of the specified range.
2

Brake Rotor Bolts (if applicable)

M8 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated torque value. Consult vehicle manufacturer's repair manual for specific recommendations.

Brake Master Cylinder and Lines

1

Brake Master Cylinder Mounting Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated torque value. Consult vehicle manufacturer's repair manual for specific recommendations.
2

Brake Line Fittings

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated torque value. Consult vehicle manufacturer's repair manual for specific recommendations.

ABS and Wheel Components

1

ABS Sensor Bolts (if equipped)

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated torque value. Consult vehicle manufacturer's repair manual for specific recommendations.
2

Wheel Lug Nuts

M14 x 1.5
Torque Specification
88 ft-lbs (120 N·m)
Important Notes
Torque value is an average of the specified range.

Drivetrain

Torque specifications for Drivetrain

Engine

1

Flywheel Bolts

M14 x 1.5
Torque Specification
94 ft-lbs (128 N·m)
Important Notes
Proper torque ensures the flywheel remains securely attached to the crankshaft.
2

Main Bearing Bolts

M12 x 1.25
Torque Specification
61 ft-lbs (83 N·m)
Important Notes
Proper torque ensures the main bearings are securely fastened to the engine block.
3

Connecting Rod Nuts

M10 x 1.0
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Proper torque ensures the connecting rods are securely attached to the crankshaft.
4

Camshaft Sprocket Bolt

M12 x 1.25
Torque Specification
94 ft-lbs (128 N·m)
Important Notes
Proper torque ensures the camshaft sprocket is securely attached to the camshaft.

Transmission

1

Transmission Mounting Bolts

M14 x 1.5
Torque Specification
58 ft-lbs (78 N·m)
Important Notes
Proper torque ensures the transmission is securely attached to the engine and chassis.
2

Transmission Crossmember Bolts

M12 x 1.25
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Proper torque ensures the transmission crossmember is securely attached to the chassis.

Drivetrain

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Specification
58 ft-lbs (78 N·m)
Important Notes
Proper torque ensures the drive axles/half shafts are securely attached to the transmission and differential.
2

CV Joint/Axle Nut

M18 x 1.5
Torque Specification
217 ft-lbs (294 N·m)
Important Notes
Proper torque ensures the CV joint is securely attached to the axle shaft.
3

Propeller/Drive Shaft Bolts

M10 x 1.0
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Proper torque ensures the drive shaft is securely attached to the transmission and differential.

Differential

1

Differential Cover Bolts

M10 x 1.0
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Proper torque ensures the differential cover is securely attached to the differential housing.
2

Axle Shaft Retaining Bolts

M12 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Proper torque ensures the axle shafts are securely attached to the differential.
3

Differential Drain/Fill Plug

M14 x 1.5
Torque Specification
29 ft-lbs (39 N·m)
Important Notes
Proper torque ensures the differential drain/fill plug is securely attached to the differential housing.

Electrical

Torque specifications for Electrical

Alternator and Starter Motor Mounting

1

Alternator Mounting Bolts

M12 x 1.5
Torque Specification
36.5 ft-lbs (49.5 N·m)
Important Notes
Estimated average torque value from the given range.
2

Starter Motor Mounting Bolts

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

Battery Terminal Connections

1

Battery Terminal Nuts

M8 x 1.25
Torque Specification
57 inch-lbs (6.8 N·m)
Important Notes
Estimated average torque value from the given range.

Ignition Coil and Fuel Pump Electrical Connections

1

Ignition Coil Bracket Bolts

M8 x 1.25
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated average torque value from the given range.
2

Fuel Pump Electrical Connector Bolts

M5 x 0.8
Torque Specification
7.5 inch-lbs (0.85 N·m)
Important Notes
Estimated average torque value from the given range.
3

A/C Compressor Electrical Connector Bolts

M5 x 0.8
Torque Specification
7.5 inch-lbs (0.85 N·m)
Important Notes
Estimated average torque value from the given range.

Emissions Sensors

Torque specifications for Emissions_sensors

Oxygen Sensors

1

Oxygen Sensor (O2 Sensor) Bolts

M8 x 1.25
Torque Specification
18.5 ft-lbs (25 N·m)
Important Notes
Estimated torque value based on typical O2 sensor bolt sizes and applications. Ensure the sensor is properly aligned before tightening.
2

Heated Oxygen Sensor (HO2S) Bolts

M8 x 1.25
Torque Specification
18.5 ft-lbs (25 N·m)
Important Notes
Estimated torque value based on typical HO2S bolt sizes and applications. Ensure proper alignment and avoid overtightening.

Nox Sensors

1

NOx Sensor Bolts

M8 x 1.25
Torque Specification
18.5 ft-lbs (25 N·m)
Important Notes
Estimated torque value based on typical NOx sensor bolt sizes and applications. Ensure proper alignment and avoid overtightening.

Egt Sensors

1

Exhaust Gas Temperature (EGT) Sensor Bolts

M8 x 1.25
Torque Specification
18.5 ft-lbs (25 N·m)
Important Notes
Estimated torque value based on typical EGT sensor bolt sizes and applications. Ensure proper alignment and avoid overtightening.

Egr Valve

1

EGR Valve Bolts

M8 x 1.25
Torque Specification
19.5 ft-lbs (26.5 N·m)
Important Notes
Torque value based on provided specifications. Ensure proper alignment and avoid overtightening.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold Headers

1

Exhaust Manifold/Headers to Engine Block Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure and prevent warping.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar M8 bolt applications. Ensure proper sealing to prevent exhaust leaks.

Exhaust Pipe Connections

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure proper alignment before tightening to prevent stress on the exhaust system.
2

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure proper alignment to avoid damaging the catalytic converter.
3

Muffler to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Estimated value based on similar M8 bolt applications. Ensure proper alignment to prevent rattling.

Exhaust System Mounting

1

Exhaust System Mounting Bolts (Bracket to Frame)

M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Estimated value based on similar M8 bolt applications. Ensure brackets are properly aligned before tightening.
2

Exhaust Clamp Bolts (Flexible Joints)

M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar M6 bolt applications. Ensure clamps are properly aligned to prevent leaks.

Exhaust Heat Shield

1

Exhaust Heat Shield Bolts

M6 x 1.0
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value based on similar M6 bolt applications. Ensure heat shield is properly aligned to avoid rattling.

Fuel

Torque specifications for Fuel

Fuel Rail System

1

Fuel Rail Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure even tightening in a crisscross pattern to avoid warping the fuel rail.
2

Fuel Injector Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure injectors are properly seated before tightening.

Fuel Pump System

1

Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Ensure the fuel pump gasket is properly seated before tightening.
2

Fuel Tank Sender Unit Bolts

M6 x 1.0
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Estimated value based on similar components. Ensure proper sealing of the sender unit.

Fuel Tank System

1

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Ensure straps are evenly tightened to avoid stressing the fuel tank.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
7.5 ft-lbs (10 N·m)
Important Notes
Converted from inch-lbs to ft-lbs. Ensure proper sealing of the filler neck.

Fuel Filter System

1

Fuel Filter Bolt/Nut

M8 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the filter is properly aligned before tightening.

Fuel Pressure Regulation

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 proper sealing of the regulator.
2

Fuel Return Line Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Estimated value based on similar components. Ensure proper sealing of the return line.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Torque value is based on typical specifications for M10 bolts. Always follow the manufacturer's recommended sequence.

Ac Lines

1

A/C Line Fittings

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Torque value is estimated based on typical specifications for M8 fittings. Ensure fittings are clean and free of debris before tightening.

Evaporator

1

Evaporator Housing Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Torque value is estimated based on typical specifications for M6 bolts. Ensure housing is properly aligned before tightening.

Heater Core

1

Heater Core Inlet/Outlet Fittings

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Torque value is estimated based on typical specifications for M8 fittings. Ensure fittings are clean and free of debris before tightening.

Blower Motor

1

Blower Motor Mounting Bolts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Torque value is estimated based on typical specifications for M6 bolts. Ensure motor is properly aligned before tightening.

Condenser

1

Condenser Mounting Bolts

M8 x 1.25
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Torque value is estimated based on typical specifications for M8 bolts. Always follow the manufacturer's recommended sequence.

Suspension

Torque specifications for Suspension

Front Suspension

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
130 ft-lbs (176 N·m)
Important Notes
Torque value is an average of the specified range.
2

Control Arm Bolts

M12 x 1.25
Torque Specification
97 ft-lbs (132 N·m)
Important Notes
Torque value is an average of the specified range.
3

Ball Joint Nut

M16 x 1.5
Torque Specification
46 ft-lbs (62 N·m)
Important Notes
Torque value is an average of the specified range.

Steering System

1

Tie Rod End Nut

M14 x 1.5
Torque Specification
39 ft-lbs (53 N·m)
Important Notes
Torque value is an average of the specified range.
2

Steering Gear Mounting Bolts

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

Sway Bar System

1

Sway Bar Link Nut

M12 x 1.25
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Torque value is an average of the specified range.
2

Sway Bar Mounting Bolts

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

Control Arm Bushings

1

Upper Control Arm Bushing Bolts

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

Lower Control Arm Bushing Bolts

M12 x 1.25
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Estimated torque value based on general industry standards.

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 setting for the lug nuts on a 2013 Infiniti g37?

103 ft-lbs or 140 Nm

Q2

What type of torque wrench IS most suitable for tightening engine head bolts on a 2009 g37?

A high-quality click-type torque wrench that meets or exceeds industry standards

Q3

When tightening critical bolts, such as suspension components, IS it advisable to use anti-seize lubricant?

Yes, applying a small amount of anti-seize lubricant to the threads of critical bolts can prevent seizing and ensure proper torque application

Q4

What should be done if a torque specification IS not listed in the manual for a specific component?

If a torque specification IS unavailable, consult with an authorized Infiniti technician or refer to a reliable online resource that provides Infiniti-specific information

Q5

Can I use a torque multiplier to achieve higher torque settings?

Yes, a torque multiplier can be used to amplify the torque applied by the torque wrench, but caution must be exercised to prevent over-tightening

Q6

What IS the proper sequence for tightening multiple bolts on a component, such as a cylinder head?

Always follow the manufacturer's specified tightening sequence and torque values to ensure even distribution of load and prevent warping

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 G37.

  • 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
Technical Service Bulletins

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Technical Information
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About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

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