Acura TL 2009-2014 Drivetrain Bolt Torque Specifications & Fastener Values
Acura TL 2009-2014

Acura TL 2009-2014 Drivetrain Bolt Torque Specifications

Comprehensive list of torque specifications for drivetrain bolts on the 2009-2014 Acura TL, including transmission, driveshaft, and differential 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 Internal

Torque specifications for components inside the engine, directly related to the drivetrain.

1

Flywheel Bolts

M10 x 1.25
Torque Value
94 ft-lbs (127 N·m)
Important Notes
Tighten in a star pattern to ensure even clamping pressure. Use new bolts if recommended by manufacturer.
2

Camshaft Sprocket Bolt

M10 x 1.25
Torque Value
94 ft-lbs (127 N·m)
Important Notes
Ensure camshaft timing is set correctly before torquing. Use new bolts if recommended by the manufacturer.
3

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Value
181 ft-lbs (245 N·m)
Important Notes
Ensure the harmonic balancer is properly seated on the crankshaft before tightening. May require special tools to hold the crankshaft during tightening.

Transmission

Torque specifications for transmission related components.

1

Transmission Mounting Bolts

M12 x 1.75
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Tighten bolts evenly to prevent stress on the transmission housing and engine block.
2

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
8.7 ft-lbs (12 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even sealing pressure. Use new gasket if necessary.
3

Transmission Drain and Fill Plugs

M18 x 1.5
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Use a new sealing washer to prevent leaks.
4

Transmission Cooler Line Fittings

M12 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Estimated value. Ensure proper alignment of fittings to prevent leaks. Overtightening can damage the fittings.
5

Torque Converter Bolts

M10 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Estimated value. Tighten bolts in a circular pattern to ensure even pressure. Do not over-torque.

Clutch Components

Torque specifications for manual transmission clutch components.

1

Clutch Pressure Plate Bolts

M8 x 1.25
Torque Value
23 ft-lbs (31 N·m)
Important Notes
Estimated value. Tighten in a star pattern. Ensure clutch disc is properly aligned during installation. May use loctite if specified.

Axle And Driveshaft

Torque specifications for axle and driveshaft components.

1

Drive Axle/Half Shaft Bolts

M10 x 1.25
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Ensure bolts are properly threaded to prevent damage.
2

CV Joint/Axle Nut

M22 x 1.5
Torque Value
181 ft-lbs (245 N·m)
Important Notes
Use new axle nut if available. This nut is critical for securing the wheel bearing. May need specific tool for torquing.
3

Propeller/Drive Shaft Bolts

M10 x 1.25
Torque Value
54 ft-lbs (73 N·m)
Important Notes
Tighten evenly to prevent vibration. Applies to AWD models only.

Differential

Torque specifications for differential related components.

1

Differential Drain/Fill Plug

M18 x 1.5
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Use new sealing washer to prevent leaks. Only applies to AWD models.
2

Differential Mounting Bolts

M12 x 1.75
Torque Value
50 ft-lbs (68 N·m)
Important Notes
Estimated value. Tighten evenly to prevent stress on the differential housing. Applies to AWD models only.

Transfer Case

Torque specifications for transfer case related components.

1

Transfer Case Drain/Fill Plug

M18 x 1.5
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Use new sealing washer to prevent leaks. Only applies to AWD models.

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

Why is using the correct torque specification important?

Using the correct torque specification is crucial to ensure proper clamping force, which prevents bolts from loosening due to vibration. Over-tightening can stretch or break bolts, damage threads, or deform components, while under-tightening can cause parts to become loose, leading to premature wear, damage, and potential failure. For example, an improperly torqued axle nut can lead to wheel bearing failure and a loss of control of the vehicle.

Q2

What type of tool is recommended for achieving accurate torque?

A calibrated torque wrench is essential for accurate torque application. Use a click-type or digital torque wrench, and ensure it's within its calibration period. Avoid using impact wrenches for final torque settings, as they are difficult to control accurately and may over-tighten bolts. Hand-tighten bolts first before using the torque wrench for final torquing.

Q3

Should I use new bolts when reassembling drivetrain components?

Yes, it is generally recommended to use new bolts, especially for critical components like the driveshaft and axle, whenever possible. Many bolts are designed for single use and may stretch or become weaker upon removal. Reusing old bolts can lead to improper clamping force and potential failure. Refer to the manufacturer's service manual for specific recommendations for each fastener.

Q4

What does 'lubricate threads' mean regarding torque specifications?

When the torque specification mentions 'lubricate threads,' it typically means applying a light coating of engine oil or anti-seize compound to the bolt threads. This reduces friction and allows for more accurate torque application. The specified torque value is based on whether the threads are lubricated or dry. If not lubricated when specified, the bolt will be tighter than intended and could result in damage. Always follow the manufacturer's instructions.

Q5

What should I do if I accidentally over-torque a bolt?

If you suspect you have over-torqued a bolt, it is best to replace it and inspect the component it was attached to for damage, especially threaded holes. Over-torquing can stretch or yield the bolt, making it unsafe to reuse and potentially damaging the mating surface. Never ignore a suspected over-torqued fastener, and replace any questionable component.

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 (1/2" drive)

A calibrated torque wrench with a 1/2" drive is essential for applying accurate torque to larger drivetrain bolts.

  • Click-type mechanism
  • Wide torque range (e.g., 20-150 ft-lb)
  • Clear torque scale
Learn more

Torque Wrench (3/8" drive)

A calibrated torque wrench with a 3/8" drive for smaller, more sensitive torque applications.

  • Click-type mechanism
  • Appropriate torque range (e.g., 5-80 ft-lb)
  • Clear torque scale
Learn more

Socket Set (1/2" and 3/8" drive)

A comprehensive socket set with both 1/2" and 3/8" drive sockets, including metric sizes commonly found on the Acura TL drivetrain.

  • Includes various sizes (e.g., 10mm-24mm)
  • 6-point sockets preferred
  • Durable construction
Learn more

Extension Bars (1/2" and 3/8" drive)

Extension bars of various lengths to reach recessed or difficult-to-access bolts.

  • Various lengths (e.g., 3", 6", 10")
  • Durable construction
  • Secure attachment to sockets and wrenches
Learn more

Universal Joint (1/2" and 3/8" drive)

A universal joint to allow for torque application at angles.

  • Durable construction
  • Secure attachment to sockets and wrenches
Learn more
Service Procedures

Driveshaft Bolt Torque Procedure

This procedure outlines the steps for correctly torquing the driveshaft bolts on the Acura TL.

  • Locate the driveshaft bolts at both the transmission and rear differential end.
  • Ensure the threads of bolts and mating surfaces are clean and free of debris.
  • Install the bolts and tighten them finger-tight initially.
  • Using the appropriate socket, extension, and torque wrench, tighten the bolts in a star pattern to the specified torque of 47 lb-ft (64 Nm).
  • Double check that all bolts have been tightened to the correct torque spec.
View full procedure

Axle Nut Torque Procedure (Front)

This procedure outlines the steps for correctly torquing the front axle nuts on the Acura TL.

  • Locate the axle nuts at the front hubs.
  • Ensure the threads of nuts and mating surfaces are clean and free of debris.
  • Install the nuts and tighten them finger-tight initially.
  • Using the appropriate socket and torque wrench, tighten the nuts to the specified torque of 181 lb-ft (245 Nm).
  • Ensure the nut is secured with a new cotter pin if applicable.
View full procedure

Rear Differential Mounting Bolt Torque Procedure

This procedure outlines the steps for correctly torquing the rear differential mounting bolts on the Acura TL.

  • Locate the rear differential mounting bolts.
  • Ensure the threads of bolts and mating surfaces are clean and free of debris.
  • Install the bolts and tighten them finger-tight initially.
  • Using the appropriate socket, extension, and torque wrench, tighten the bolts to the specified torque of 53 lb-ft (72 Nm) for smaller bolts and 80 lb-ft (108 Nm) for larger bolts.
  • Double check that all bolts have been tightened to the correct torque spec.
View full procedure
Technical Service Bulletins

Driveshaft Bolt Loosening Issue

2012-03-15

Some 2009-2012 Acura TL models have experienced issues with driveshaft bolts loosening over time. This can lead to vibration and noise. Incorrect torque application is a potential cause.

2009-2012

Resolution: Verify proper torque application (47 lb-ft). Inspect threads for wear. Consider using new bolts with pre-applied threadlocker.

Front Axle Nut Noise

2011-08-20

Reports of clicking or knocking noise from the front axle nuts have been received on some 2010-2011 models, often a result of insufficient torque or re-use of old cotter pins.

2010-2011

Resolution: Ensure the front axle nuts are torqued to 181 lb-ft (245 Nm). Always replace cotter pin. Inspect for damage or wear of hub and related components.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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