Acura RDX 2013-2018 Drivetrain Bolt Torque Specifications & Fastener Values
Acura RDX 2013-2018

Acura RDX 2013-2018 Drivetrain Bolt Torque Specifications

Detailed torque specifications for various bolts within the drivetrain system of the 2013-2018 Acura RDX, including engine mounts, 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

Drivetrain Flywheel

Torque specifications for the flywheel and related components.

1

Flywheel Bolts

M12 x 1.25
Torque Value
94 ft-lbs (127 N·m)
Important Notes
Tighten bolts in a star pattern. Ensure flywheel is properly seated against crankshaft flange. Clean threads are critical.

Drivetrain Transmission

Torque specifications for the transmission and related components.

1

Transmission Mounting Bolts

M12 x 1.75
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Ensure transmission is properly aligned before tightening. Clean threads are vital.
2

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten bolts in a criss-cross pattern. Overtightening may cause leaks. Ensure gasket is in good condition.
3

Transmission Drain and Fill Plugs

M18 x 1.5
Torque Value
29 ft-lbs (39 N·m)
Important Notes
Use new sealing washers if needed. Avoid over-tightening.
4

Automatic Transmission Bellhousing Bolts

M10 x 1.5
Torque Value
33 ft-lbs (45 N·m)
Important Notes
Ensure transmission is properly aligned to engine before tightening. Clean threads are vital.

Drivetrain Clutch

Torque specifications for the clutch assembly.

1

Clutch Pressure Plate Bolts

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Tighten bolts in a star pattern. Ensure correct alignment of clutch disc. Clean threads are critical.

Drivetrain Axles

Torque specifications for drive axles and CV joints.

1

Drive Axle/Half Shaft Bolts

M10 x 1.5
Torque Value
59 ft-lbs (80 N·m)
Important Notes
Ensure the axle is seated properly in the hub and differential flanges. Use new bolts if required. Clean threads are critical.
2

CV Joint/Axle Nut

M22 x 1.5
Torque Value
181 ft-lbs (245 N·m)
Important Notes
This nut may require a special tool. Check for proper bearing preload. Use a new nut if specified by the manufacturer.

Drivetrain Driveshaft

Torque specifications for propeller shaft components.

1

Propeller/Drive Shaft Bolts

M10 x 1.5
Torque Value
59 ft-lbs (80 N·m)
Important Notes
Ensure proper alignment of driveshaft to flanges. Clean threads are vital.

Drivetrain Differential

Torque specifications for the differential and related components.

1

Differential Mounting Bolts/Nuts

M12 x 1.75
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Ensure proper alignment. Clean threads are essential.
2

Differential Drain/Fill Plug

M18 x 1.5
Torque Value
33 ft-lbs (45 N·m)
Important Notes
Use a new sealing washer if needed. Avoid over-tightening.
3

Rear Differential Cover Bolts

M8 x 1.25
Torque Value
29 ft-lbs (39 N·m)
Important Notes
Tighten bolts in a criss-cross pattern. Ensure gasket is properly seated. Clean threads are vital.

Drivetrain Transfer Case

Torque specifications for the transfer case components.

1

Transfer Case Drain/Fill Plug

M18 x 1.5
Torque Value
29 ft-lbs (39 N·m)
Important Notes
Use new sealing washers if needed. Avoid over-tightening.

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 it important to use the correct torque specifications for drivetrain bolts?

Using the correct torque is critical for proper clamping force and joint integrity. Under-torquing can lead to bolts loosening, resulting in component failure, noise, and potential accidents. Over-torquing can stretch or break bolts, damage threads, or crush gaskets and seals, leading to leaks and further component damage. Consistent and proper torque ensures a safe and reliable drivetrain.

Q2

Where can I find the specific torque specifications for my 2013-2018 Acura RDX?

The most reliable source for torque specifications is the Acura service manual for your specific model year. You can usually find these specifications in the 'Chassis' and/or 'Transmission' sections. Alternatively, reputable online parts retailers or forums specific to the Acura RDX may provide torque specifications; however always verify any online sources with the service manual if possible.

Q3

What type of lubricant should I use on drivetrain bolts?

Generally, unless otherwise specified in the service manual, clean, dry threads are recommended. Some components, like those involving aluminum, may benefit from using a light anti-seize compound, but consult your Acura RDX service manual for specific recommendations. Avoid using grease or oil on most threaded fasteners unless explicitly stated.

Q4

Should I replace drivetrain bolts when I remove them?

Certain drivetrain bolts are considered 'torque-to-yield' (TTY) or 'stretch bolts'. These bolts are designed to permanently stretch when tightened to the correct torque and must be replaced when removed. If your service manual specifies a torque-to-yield tightening method, the bolts must be replaced with new ones. Other bolts can be reused as long as they are not visibly damaged, stretched or corroded. Always consult your service manual.

Q5

What happens if I don't have a torque wrench?

While a torque wrench is the most accurate way to tighten bolts, it's strongly discouraged to rely on 'feel' for drivetrain components. An improperly torqued bolt can cause severe damage or dangerous component failures. It's recommended to borrow or purchase a torque wrench before attempting any drivetrain maintenance. In an emergency, you could use a local auto shop to torque the bolts after your initial install.

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 inch drive)

A 1/2 inch drive torque wrench capable of accurately measuring torque values in ft-lbs or Nm.

  • Click-type or digital readout
  • Accuracy within +/- 3%
Learn more

Torque Wrench (3/8 inch drive)

A 3/8 inch drive torque wrench, often used for lower torque fasteners.

  • Click-type or digital readout
  • Accuracy within +/- 3%
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets in 1/2 and 3/8 inch drives to fit various drivetrain fasteners.

  • Variety of sizes ranging from 10mm to 24mm
  • 6-point design for secure grip
Learn more

Extension Bars

Various lengths of extension bars to reach recessed bolts.

  • 1/2 and 3/8 inch drive options
  • Durable construction
Learn more

U-Joint Adapter

A universal joint adapter to access bolts at difficult angles.

  • 1/2 and 3/8 inch drive options
  • Allows for angled access
Learn more
Service Procedures

Rear Differential Fluid Drain and Refill

Procedure for draining and refilling the rear differential fluid and torque specifications of the drain and fill plugs.

  • Locate drain and fill plugs on the rear differential.
  • Remove drain plug and drain old fluid into a suitable container.
  • Reinstall drain plug using a new crush washer and torque to 33 lb-ft (45 Nm).
  • Remove fill plug and fill with specified fluid until level with fill hole.
  • Reinstall fill plug using new crush washer and torque to 33 lb-ft (45 Nm).
View full procedure

Driveshaft Bolt Torque Specification

Procedure for checking and tightening the driveshaft bolts to the correct torque specification.

  • Locate the bolts connecting the driveshaft to the transmission/transfer case and the rear differential.
  • Using a torque wrench, tighten each bolt to 43 lb-ft (59 Nm).
  • Verify all bolts are correctly torqued to specifications.
  • Inspect bolts for any signs of damage or wear and replace if needed.
View full procedure

Transfer Case Fluid Drain and Refill

Procedure for draining and refilling the transfer case fluid, and proper torque specification of the plugs.

  • Locate drain and fill plugs on the transfer case.
  • Remove the drain plug and drain the old fluid into a suitable container.
  • Reinstall drain plug using a new crush washer and torque to 33 lb-ft (45 Nm).
  • Remove fill plug and fill with specified fluid until level with fill hole.
  • Reinstall fill plug using new crush washer and torque to 33 lb-ft (45 Nm).
View full procedure
Technical Service Bulletins

Rear Differential Whine/Noise on Acceleration

2017-03-15

Some 2013-2018 Acura RDX vehicles may exhibit a whine or noise coming from the rear differential during acceleration or low speed turns. This may be attributed to improper differential fluid.

2013-2018

Resolution: Drain and refill the rear differential with the updated differential fluid, and inspect driveshaft bolts.

Transfer Case Oil Leakage

2016-08-22

Some vehicles may experience oil leakage from the transfer case seals. This is due to improper assembly of components.

2014-2016

Resolution: Inspect all transfer case seals, replace with new seals and torque all connecting bolts to specification.

Driveshaft Bolt Inspection

2018-01-10

Driveshaft bolts may come loose over time, resulting in excessive vibration or drivetrain noise.

2013-2018

Resolution: Inspect all driveshaft bolts, tighten to proper specification, replace any bolts if there is sign of stretch or fatigue.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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