Acura RDX 2007-2012 Drivetrain Bolt Torque Specifications
This page provides a comprehensive list of torque specifications for various bolts within the drivetrain system of the 2007-2012 Acura RDX. Includes specifications for the transmission, transfer case, and differential.
Important Information
Safety guidelines and reference information for proper torque application
Safety First
- Always verify torque specifications with your vehicle's factory service manual
- Use properly calibrated torque wrenches
- Replace all torque-to-yield (TTY) bolts - they are single-use only
- When in doubt, consult a professional mechanic
Quick Reference Guide
Quick Reference Guide
Common Torque Patterns
Star Pattern
Used for wheels and other circular bolt patterns
Cross Pattern
Used for gaskets and cover plates
Sequential Pattern
Used for head bolts and other critical components
Common Mistakes to Avoid
Common Mistakes to Avoid
Over-tightening
Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.
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.
Follow the manufacturer's specified torque sequence pattern.
Dirty Threads
Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.
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.
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.
Check if specs are for dry or lubricated threads. Use specified lubricant when required.
Recommended Tools
Recommended Tools
Torque Wrench (1/4" Drive)
Torque Wrench (3/8" Drive)
Torque Wrench (1/2" Drive)
Angle Gauge
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
M10 x 1.25
Flywheel Bolts
M10 x 1.25Torque Value
Important Notes
Drivetrain Transmission
Torque specifications for the transmission, bellhousing, and related components.
1 Transmission Bellhousing Bolts to Engine Block
M12 x 1.75
Transmission Bellhousing Bolts to Engine Block
M12 x 1.75Torque Value
Important Notes
2 Transmission Mounting Bolts
M12 x 1.75
Transmission Mounting Bolts
M12 x 1.75Torque Value
Important Notes
3 Transmission Oil Pan Bolts
M6 x 1.0
Transmission Oil Pan Bolts
M6 x 1.0Torque Value
Important Notes
4 Transmission Drain and Fill Plugs
M18 x 1.5
Transmission Drain and Fill Plugs
M18 x 1.5Torque Value
Important Notes
Drivetrain Axles
Torque specifications for drive axle/half shaft and related components.
1 Drive Axle/Half Shaft Bolts (Inner CV Joint)
M10 x 1.25
Drive Axle/Half Shaft Bolts (Inner CV Joint)
M10 x 1.25Torque Value
Important Notes
2 CV Joint/Axle Nut
M22 x 1.5
CV Joint/Axle Nut
M22 x 1.5Torque Value
Important Notes
Drivetrain Driveshaft
Torque specifications for the propeller shaft (driveshaft) and related components.
1 Propeller/Drive Shaft Bolts
M10 x 1.5
Propeller/Drive Shaft Bolts
M10 x 1.5Torque Value
Important Notes
2 Center Support Bearing Bolts
M8 x 1.25
Center Support Bearing Bolts
M8 x 1.25Torque Value
Important Notes
Drivetrain Differential
Torque specifications for the differential and related components.
1 Differential Mounting Bolts
M12 x 1.75
Differential Mounting Bolts
M12 x 1.75Torque Value
Important Notes
2 Differential Drain and Fill Plugs
M18 x 1.5
Differential Drain and Fill Plugs
M18 x 1.5Torque Value
Important Notes
3 Front and Rear Differential Input Flange Nut
M18 x 1.5
Front and Rear Differential Input Flange Nut
M18 x 1.5Torque Value
Important Notes
Drivetrain Transfercase
Torque specifications for the transfer case and related components.
1 Transfer Case Drain and Fill Plugs
M18 x 1.5
Transfer Case Drain and Fill Plugs
M18 x 1.5Torque Value
Important Notes
Troubleshooting Guide
Common issues, diagnostic steps, and prevention guidelines
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
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
Diagnostic Steps
Visual inspection, torque verification, thread assessment
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
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
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
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 are torque specifications important for drivetrain bolts?
Why are torque specifications important for drivetrain bolts?
Proper torque ensures bolts are tight enough to prevent loosening under stress and vibration, but not so tight that they cause damage or shearing. Over-tightening can stretch or break bolts, damage threads in the transmission or differential housings, and lead to component failure. Under-tightening can cause components to shift or separate, resulting in severe damage and potentially hazardous situations. For example, if a driveshaft bolt is under-torqued, it could come loose while driving, leading to loss of control.
Q2 Can I use 'feel' instead of a torque wrench?
Can I use 'feel' instead of a torque wrench?
While experienced mechanics may develop a good sense of tightness, using 'feel' instead of a calibrated torque wrench is highly discouraged for drivetrain components. The forces involved in transmitting power require precise torque application to ensure secure and reliable operation. Relying on 'feel' can easily lead to over or under-tightening, which, as noted above, can cause serious problems and increase the risk of accidents, not to mention the potential for increased component wear. A torque wrench is an essential tool.
Q3 Should I use thread locker on drivetrain bolts?
Should I use thread locker on drivetrain bolts?
The use of thread locker depends on the specific bolt and its location, and should always follow manufacturer's recommendations. Some bolts are designed to be used with thread locker, like the driveshaft flange bolts, to prevent them from loosening over time. Check the service manual for your 2007-2012 Acura RDX. For example, if the manual specifies thread locker on the transfer case bolts, you must use the correct type; using the wrong thread locker can cause further issues.
Q4 What happens if I don't tighten drivetrain bolts to the correct torque?
What happens if I don't tighten drivetrain bolts to the correct torque?
Failure to adhere to torque specifications can lead to a range of issues. Under-torqued bolts may loosen over time, causing vibrations, clunking noises, and component damage. In extreme cases, components can separate, leading to loss of vehicle control. Over-torqued bolts can stretch or break, requiring replacement of the bolt itself or damaged components, and possibly causing thread damage which could require extensive and costly repairs. For example, over tightening a rear differential mounting bolt could cause the bolt to shear off requiring a difficult and time-consuming repair.
Q5 Do I need to re-torque drivetrain bolts after driving?
Do I need to re-torque drivetrain bolts after driving?
Generally, re-torquing is not required for most drivetrain bolts after initial installation, however, it's recommended to check them after a short initial drive. If you've worked on critical components such as the driveshaft or differential mounting, double-checking after 50-100 miles is good practice and may be recommended in the service manual. If any bolts are found to have loosened, investigate the cause and retorque to the correct specifications.
Environmental Considerations
Temperature, humidity, and seasonal effects on torque specifications
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
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
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
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 1/2" drive torque wrench is essential for accurately tightening larger drivetrain bolts and fasteners to specification. Offers a higher torque range, and is usually used for wheels, axle nuts and other components.
- Wide torque range (typically 20-150 ft-lbs or more)
- Click-type or digital readout
- Durable construction
Torque Wrench (3/8" Drive)
A 3/8" drive torque wrench is suitable for smaller drivetrain bolts and fasteners, providing more control and accuracy in the lower torque range.
- Lower torque range (typically 5-80 ft-lbs)
- Compact design for tight spaces
- Click-type or digital readout
Socket Set (Metric)
A comprehensive metric socket set is required to fit the various bolt head sizes found on the drivetrain.
- Variety of sizes (8mm - 24mm and larger)
- 6-point sockets for better grip
- Durable construction
Socket Extensions
Socket extensions of various lengths help reach recessed bolts and nuts.
- Various lengths (3", 6", 10" or more)
- Durable chrome vanadium construction
- Secure locking ball
Universal Joint (Swivel Socket Adapter)
A universal joint adapter is needed for accessing bolts at angles.
- Flexible rotation
- Durable construction
- Allows work in angled positions
Service Procedures
Front Axle Nut Torque Procedure
This procedure details the steps to properly torque the front axle nut to ensure proper bearing preload and joint integrity.
- Loosen the axle nut using the correct socket and breaker bar.
- With the vehicle on the ground, and with the brakes applied, or the hubs secured, tighten the new axle nut to the manufacturer-specified torque with a 1/2" drive torque wrench. The torque specification is 181 ft-lbs.
- Reinstall and torque the wheel to the proper wheel nut torque specification (80 ft-lbs).
- Perform a test drive to ensure proper operation and listen for any unusual noise.
Rear Differential Fill Plug Torque Procedure
This procedure outlines how to properly tighten the rear differential fill plug after fluid changes.
- Locate the rear differential fill plug.
- Ensure the mating surface is clean, and install a new crush washer on the plug.
- Using the correct socket, tighten the plug to 33 ft-lbs with a 3/8" drive torque wrench.
- Verify there are no leaks.
Rear Differential Drain Plug Torque Procedure
This procedure details how to correctly tighten the rear differential drain plug after fluid changes.
- Locate the rear differential drain plug.
- Ensure the mating surface is clean, and install a new crush washer on the plug.
- Using the correct socket, tighten the plug to 33 ft-lbs with a 3/8" drive torque wrench.
- Verify there are no leaks.
Driveshaft Bolts Torque Procedure
This procedure explains the proper torquing procedure for the bolts connecting the driveshaft to the differential.
- Locate the driveshaft bolts at the rear differential flange
- Ensure the mating surfaces are clean and there are no foreign objects
- Using the correct socket, tighten the bolts in a crisscross pattern to 30 ft-lbs using a 3/8" drive torque wrench
- Verify proper alignment and test-drive vehicle
Technical Service Bulletins
Rear Differential Fluid Leakage from Fill Plug
2011-05-15Some 2007-2012 Acura RDX vehicles may exhibit a slow leak around the rear differential fill plug after a fluid change. This is often due to a used or damaged crush washer.
Resolution: Always use a new crush washer when reinstalling the fill plug. Ensure proper torque specification (33 ft-lbs) is achieved. Clean mating surfaces before installation.
Premature Driveshaft Bolt Corrosion
2010-02-22Some driveshaft bolts may corrode prematurely due to environmental factors. This can cause noise or vibration. Ensure the mating surfaces are clean, and apply an anti-seize compound on the bolt threads to prevent corrosion. Always replace with OEM hardware when possible.
Resolution: Inspect driveshaft bolts for corrosion. Replace with new, properly torqued (30 ft-lbs) bolts using a 3/8" torque wrench. Apply anti-seize compound.
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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.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.