Infiniti FX35 2003-2008 Drivetrain Bolt Torque Specifications & Fastener Values
Infiniti FX35 2003-2008

Infiniti FX35 2003-2008 Drivetrain Bolt Torque Specifications

Detailed torque specifications for the drivetrain bolts of the 2003-2008 Infiniti FX35, including driveshaft, differential, and transmission components.

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, and connecting rods.

1

Flywheel Bolts

M12 x 1.75
Torque Value
94 ft-lbs (128 N·m)
Important Notes
Proper torque is essential to prevent damage to the flywheel, crankshaft, and surrounding components.
2

Main Bearing Bolts

M14 x 2.0
Torque Value
56 ft-lbs (76 N·m)
Important Notes
Proper torque ensures the bearings are securely seated and the crankshaft is properly aligned.
3

Connecting Rod Nuts

M10 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Proper torque is necessary to prevent damage to the rods, bearings, and surrounding components.

Transmission

Bolt torque specifications for transmission components, including transmission mounting bolts, transmission oil pan bolts, and drain and fill plugs.

1

Transmission Mounting Bolts

M12 x 1.75
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Proper torque ensures the transmission is properly aligned and supported.
2

Transmission Oil Pan Bolts

M8 x 1.25
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Proper torque ensures the oil pan is properly sealed and the transmission is protected from contamination.
3

Transmission Drain and Fill Plugs

M10 x 1.5
Torque Value
29 ft-lbs (39 N·m)
Important Notes
Proper torque ensures the plugs are securely seated and the transmission is protected from contamination.

Driveshaft and axles

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

1

Drive Axle/Half Shaft Bolts

M14 x 2.0
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Proper torque is necessary to prevent damage to the axles, bearings, and surrounding components.
2

CV Joint/Axle Nut

M16 x 2.5
Torque Value
165 ft-lbs (224 N·m)
Important Notes
Proper torque is essential to prevent damage to the CV joint, axle shaft, and surrounding components.
3

Propeller/Drive Shaft Bolts

M14 x 2.0
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Proper torque is necessary to prevent damage to the propeller shaft, bearings, and surrounding components.

Differential and transfer case

Bolt torque specifications for differential and transfer case components, including differential cover bolts and transfer case mounting bolts.

1

Differential Cover Bolts

M10 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Proper torque ensures the cover is properly sealed and the differential is protected from contamination. **Estimated value**
2

Transfer Case Mounting Bolts

M12 x 1.75
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Proper torque ensures the transfer case is properly aligned and supported. **Estimated value**
3

Drive Shaft Center Bearing Bolts

M8 x 1.25
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Proper torque ensures the bearing is properly seated and the drive shaft is properly supported. **Estimated value**

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 are the torque specifications for the drivetrain bolts on a 2003-2008 Infiniti FX35?

The torque specifications for the drivetrain bolts on a 2003-2008 Infiniti FX35 vary depending on the specific bolt. For example, the transmission mount bolts typically require a torque of 25-30 Nm, while the differential bolts may require 40-50 Nm. Always refer to the manufacturer's service manual for precise values.

Q2

How often should I check the torque on drivetrain bolts?

It is recommended to check the torque on drivetrain bolts during routine maintenance, such as every 12,000 miles or annually. Additionally, inspect them after any significant drivetrain repairs or if you notice unusual vibrations or noises.

Q3

Can I use a standard torque wrench for drivetrain bolts?

Yes, a standard torque wrench is suitable for most drivetrain bolts. However, ensure it is calibrated and capable of handling the torque range required for your specific bolts. For critical components, consider using a digital torque wrench for more accuracy.

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

Torque Wrench

A precision tool used to apply a specific torque to a fastener, such as a bolt or nut.

  • Adjustable torque settings
  • Calibrated for accuracy
Learn more

Socket Set

A set of sockets in various sizes to fit different bolts and nuts.

  • Includes both metric and standard sizes
  • Durable construction
Learn more

Breaker Bar

A long-handled tool used to loosen tight bolts before applying torque.

  • High leverage for tough bolts
  • Durable steel construction
Learn more
Service Procedures

Drivetrain Bolt Torque Specifications

Detailed steps to properly torque drivetrain bolts on a 2003-2008 Infiniti FX35.

  • Locate the drivetrain bolts requiring torque application.
  • Clean the bolt threads and surrounding area to ensure proper torque application.
  • Set the torque wrench to the specified torque value for the specific bolt.
  • Apply torque to the bolt in a smooth, controlled manner until the wrench clicks or signals the desired torque has been reached.
  • Double-check the torque setting and re-torque if necessary.
View full procedure

Driveshaft Bolt Replacement

Procedure for replacing and torquing driveshaft bolts on a 2003-2008 Infiniti FX35.

  • Remove the old driveshaft bolts using a breaker bar and socket set.
  • Install new bolts and hand-tighten them.
  • Use a torque wrench to apply the manufacturer-specified torque to each bolt.
  • Verify all bolts are properly torqued and secure.
View full procedure
Technical Service Bulletins

Drivetrain Bolt Torque Specification Update

2005-06-15

Updated torque specifications for drivetrain bolts on 2003-2008 Infiniti FX35 models.

2003-2008 Infiniti FX35

Resolution: Refer to the updated torque specifications in the service manual and ensure all bolts are torqued to the correct values.

Driveshaft Bolt Loosening Issue

2007-03-22

Reports of driveshaft bolts loosening over time on 2003-2008 Infiniti FX35 models.

2003-2008 Infiniti FX35

Resolution: Inspect driveshaft bolts during routine maintenance and re-torque to the specified value if necessary. Replace any damaged or worn bolts.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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