Acura ILX 2013-2021 8DCT Transmission Torque Specifications
This page provides detailed torque specifications for bolts used in the 8-speed Dual Clutch Transmission (8DCT) found in the 2013-2021 Acura ILX. Includes specifications for critical fasteners during transmission maintenance and repair.
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
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8dct-transmission Mounting
Torque specifications for mounting the 8DCT transmission to the engine and chassis.
1 Transmission Mounting Bolts
M12 x 1.75 (estimated)
Transmission Mounting Bolts
M12 x 1.75 (estimated)Torque Value
Important Notes
8dct-transmission External
Torque specifications for external components of the 8DCT transmission.
1 Transmission Oil Pan Bolts
M6 x 1.0 (estimated)
Transmission Oil Pan Bolts
M6 x 1.0 (estimated)Torque Value
Important Notes
2 Transmission Drain and Fill Plugs
M18 x 1.5 (estimated)
Transmission Drain and Fill Plugs
M18 x 1.5 (estimated)Torque Value
Important Notes
3 Drive Axle/Half Shaft Bolts
M10 x 1.25 (estimated)
Drive Axle/Half Shaft Bolts
M10 x 1.25 (estimated)Torque Value
Important Notes
8dct-transmission Internal
Torque specifications for internal components of the 8DCT transmission.
1 Transmission Case Bolts/Housing Bolts
M8 x 1.25 (estimated)
Transmission Case Bolts/Housing Bolts
M8 x 1.25 (estimated)Torque Value
Important Notes
2 Mechatronics Unit Mounting Bolts
M6 x 1.0 (estimated)
Mechatronics Unit Mounting Bolts
M6 x 1.0 (estimated)Torque Value
Important Notes
3 Clutch Actuator Mounting Bolts
M6 x 1.0 (estimated)
Clutch Actuator Mounting Bolts
M6 x 1.0 (estimated)Torque Value
Important Notes
4 Transmission Speed Sensor Bolts
M5 x 0.8 (estimated)
Transmission Speed Sensor Bolts
M5 x 0.8 (estimated)Torque 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 What happens if I overtighten the transmission bolts?
What happens if I overtighten the transmission bolts?
Overtightening bolts can stretch or weaken them, potentially leading to failure. This can cause leaks, misalignment, and even damage to the transmission case threads. In extreme cases, the bolt may break, requiring costly repairs and potentially causing further damage to surrounding components. For example, overtightening the oil pan bolts could crush the gasket, leading to leaks.
Q2 What happens if I undertighten the transmission bolts?
What happens if I undertighten the transmission bolts?
Undertightened bolts will not provide proper clamping force, potentially leading to fluid leaks, component misalignment, and premature wear. In a severe case, a bolt could come loose during operation, causing significant damage or even complete transmission failure. For instance, loose bellhousing bolts can cause vibrations and misalignment, potentially damaging the input shaft.
Q3 Should I use new bolts when working on the 8DCT transmission?
Should I use new bolts when working on the 8DCT transmission?
While not strictly required in every case, it's highly recommended to use new bolts, especially for critical components like the bellhousing or torque converter. Bolts can stretch or become fatigued over time, and reusing them may lead to inaccurate torque readings or even bolt failure. This is a preventative measure that can help to ensure a secure and reliable reassembly.
Q4 Do I need to use a torque wrench for these specifications?
Do I need to use a torque wrench for these specifications?
Absolutely. A torque wrench is essential for achieving the correct clamping force on each bolt. Using hand tools and guessing the torque is highly inaccurate and can lead to either overtightening or undertightening, both of which can be detrimental. Using a calibrated torque wrench will ensure proper assembly and help prevent future issues.
Q5 What type of lubricant should I use on the transmission bolts?
What type of lubricant should I use on the transmission bolts?
Generally, lightly lubricating bolt threads with a specified lubricant, as recommended by the manufacturer, is advised when tightening them. Using the wrong lubricant or not lubricating at all can affect the accuracy of the torque readings. For example, using a heavy grease may result in overtightening, while dry threads may under-torque during the process. Refer to the Acura service manual for specific lubricant recommendations.
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-inch Drive)
A calibrated torque wrench is essential for accurate bolt tightening.
- 10-150 ft-lb range
- Audible click indication
Torque Wrench (3/8-inch Drive)
A smaller torque wrench is useful for lower torque specifications.
- 5-80 ft-lb range
- Greater accuracy at lower torque ranges
Socket Set (Metric)
A comprehensive set of metric sockets for various bolt head sizes.
- 6-point sockets
- Sizes ranging from 8mm to 19mm
Extension Bars (Various Lengths)
Extension bars help reach recessed bolts.
- 3-inch, 6-inch, and 10-inch lengths
- 1/2-inch and 3/8-inch drive sizes
Universal Joint Adapter
A universal joint allows access to bolts at an angle.
- 1/2-inch and 3/8-inch drive sizes
- Full 360-degree rotation
Service Procedures
8DCT Transmission Fluid Drain Plug Torque Procedure
Properly tightening the transmission fluid drain plug is crucial to prevent leaks.
- Locate the transmission fluid drain plug.
- Clean the plug and surrounding area.
- Install a new crush washer on the drain plug.
- Thread the drain plug by hand.
- Using a torque wrench, tighten the drain plug to 36 lb-ft (49 N·m).
- Double-check the torque value.
8DCT Transmission Fluid Fill Plug Torque Procedure
Properly tightening the transmission fluid fill plug is crucial to prevent leaks.
- Locate the transmission fluid fill plug.
- Clean the plug and surrounding area.
- Thread the fill plug by hand.
- Using a torque wrench, tighten the fill plug to 36 lb-ft (49 N·m).
- Double-check the torque value.
8DCT Transmission Mounting Bolt Torque Procedure
Tightening the transmission mounting bolts to the correct torque is essential for secure installation and prevents vibrations.
- Locate the transmission mounting bolts.
- Clean the bolt threads and surrounding areas.
- Install the mounting bolts by hand.
- Use a criss-cross pattern when tightening to ensure even pressure
- Using a torque wrench, tighten the mounting bolts to 47 lb-ft (64 N·m) for the upper mounts and 40 lb-ft (54 N·m) for the lower mounts.
- Double-check all torque values.
8DCT Transmission Case Bolt Torque Procedure
Correctly torqueing the transmission case bolts is necessary to seal the case properly.
- Locate the transmission case bolts.
- Clean the bolt threads and surrounding areas.
- Install the bolts by hand.
- Use a criss-cross pattern when tightening to ensure even pressure
- Using a torque wrench, tighten the case bolts to 21 lb-ft (28 N·m).
- Double-check all torque values.
Technical Service Bulletins
Potential Transmission Leak from Drain Plug
2017-05-15Some 2013-2017 ILX models may experience minor fluid leaks from the transmission drain plug due to improper tightening or a faulty crush washer.
Resolution: Inspect the drain plug and crush washer. Ensure the drain plug is torqued to 36 lb-ft using a calibrated torque wrench. Replace the crush washer with a new part during each fluid service.
Vibration Issues Related to Transmission Mounting Bolts
2019-02-28Certain 2018-2020 ILX vehicles may experience vibrations due to improperly torqued transmission mounting bolts.
Resolution: Inspect all transmission mounting bolts. Ensure all upper bolts are torqued to 47 lb-ft (64 N·m) and lower bolts to 40 lb-ft (54 N·m). Retighten as necessary.
Updated Torque Specification for 8DCT Case Bolts
2020-09-10A revision has been made to the transmission case bolt torque specification to prevent potential oil leaks.
Resolution: The torque specification for all transmission case bolts is now 21 lb-ft (28 N·m). Ensure all bolts are tightened using a calibrated torque wrench to this specification.
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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.