Infiniti G37 2009-2013 Drivetrain Bolt Torque Specifications & Fastener Values
Infiniti G37 2009-2013

Infiniti G37 2009-2013 Drivetrain Bolt Torque Specifications

Detailed torque specifications for the drivetrain components of the 2009-2013 Infiniti G37, including transmission, driveshaft, and differential bolts.

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

Engine

Bolt torque specifications for engine components, including flywheel, main bearings, connecting rods, and camshaft.

1

Flywheel Bolts

M14 x 1.5
Torque Value
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 Value
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 Value
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 Value
94 ft-lbs (128 N·m)
Important Notes
Proper torque ensures the camshaft sprocket is securely attached to the camshaft.

Transmission

Bolt torque specifications for transmission components, including transmission mounting bolts and transmission crossmember bolts.

1

Transmission Mounting Bolts

M14 x 1.5
Torque Value
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 Value
70 ft-lbs (95 N·m)
Important Notes
Proper torque ensures the transmission crossmember is securely attached to the chassis.

Drivetrain

Bolt torque specifications for drivetrain components, including drive axle/half shaft bolts, CV joint/axle nut, and propeller/drive shaft bolts.

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Value
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 Value
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 Value
22 ft-lbs (30 N·m)
Important Notes
Proper torque ensures the drive shaft is securely attached to the transmission and differential.

Differential

Bolt torque specifications for differential components, including differential cover bolts, axle shaft retaining bolts, and differential drain/fill plug.

1

Differential Cover Bolts

M10 x 1.0
Torque Value
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 Value
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 Value
29 ft-lbs (39 N·m)
Important Notes
Proper torque ensures the differential drain/fill plug is securely attached to the differential housing.

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 specification for the driveshaft bolts on a 2009-2013 Infiniti G37?

The driveshaft bolts on a 2009-2013 Infiniti G37 should be torqued to 25-30 Nm (18-22 ft-lbs). Ensure the bolts are tightened evenly and in a crisscross pattern to avoid misalignment.

Q2

How often should I check the torque on drivetrain components?

It is recommended to check the torque on drivetrain components, such as driveshaft bolts and differential mounting bolts, every 30,000 miles or after any significant impact or repair. Regular inspections help prevent loosening due to vibrations and wear.

Q3

Can I reuse the same bolts when reassembling the drivetrain?

It is generally not recommended to reuse bolts, especially critical ones like driveshaft or differential bolts, as they can stretch and lose their clamping force. Always refer to the manufacturer's guidelines and replace bolts if specified.

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

A precision tool for applying accurate torque to drivetrain bolts.

  • Adjustable torque settings
  • LCD display for real-time readings
Learn more

Breaker Bar

A long-handled tool for loosening tight bolts before torque application.

  • Durable steel construction
  • Non-slip grip
Learn more

Torque Angle Gauge

Used to measure the angle of rotation when applying torque-to-yield bolts.

  • Magnetic base for easy attachment
  • 360-degree rotation measurement
Learn more
Service Procedures

Driveshaft Bolt Torque Procedure

Steps to properly torque the driveshaft bolts on a 2009-2013 Infiniti G37.

  • Raise the vehicle and secure it on jack stands.
  • Locate the driveshaft bolts at the differential and transmission connections.
  • Clean the bolt threads and apply a small amount of thread locker.
  • Tighten the bolts to the specified torque using a torque wrench.
  • Verify the torque with a second pass.
View full procedure

Rear Differential Mount Bolt Torque Procedure

Steps to torque the rear differential mount bolts to ensure proper alignment and stability.

  • Support the rear differential with a transmission jack.
  • Remove the old bolts and inspect the threads for damage.
  • Install new bolts and hand-tighten them.
  • Torque the bolts to the manufacturer's specifications in a crisscross pattern.
  • Double-check the torque after initial tightening.
View full procedure
Technical Service Bulletins

Drivetrain Vibration and Noise

2011-05-15

Some 2009-2013 Infiniti G37 models may experience drivetrain vibrations or noises due to improperly torqued driveshaft bolts.

2009-2013 Infiniti G37

Resolution: Inspect and re-torque the driveshaft bolts to the specified value. Replace any damaged bolts.

Rear Differential Mount Bolt Loosening

2012-08-22

Reports of rear differential mount bolts loosening over time, causing alignment issues and noise.

2009-2013 Infiniti G37

Resolution: Re-torque the rear differential mount bolts to the specified torque and apply thread locker to prevent loosening.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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