Acura TLX 2021-present Exhaust System Bolt Torque Specifications
Complete factory torque specifications for all exhaust components of the 2021-Present Acura TLX, including detailed procedures and specifications.
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
Exhaust Manifold Components
Torque specifications for the exhaust manifold and related mounting hardware on the 2.0L Turbo and 3.0L Turbo engines.
1 Exhaust Manifold to Cylinder Head Studs
M8 x 1.25
Exhaust Manifold to Cylinder Head Studs
M8 x 1.25Torque Value
Important Notes
2 Exhaust Manifold Shield Bolts
M6 x 1.0
Exhaust Manifold Shield Bolts
M6 x 1.0Torque Value
Important Notes
Exhaust Front Pipe Components
Torque specifications for the front exhaust pipe and related hardware. Includes connections to manifold and catalytic converter.
1 Front Pipe to Exhaust Manifold Nuts
M10 x 1.25
Front Pipe to Exhaust Manifold Nuts
M10 x 1.25Torque Value
Important Notes
2 Front Pipe to Catalytic Converter Bolts
M10 x 1.25
Front Pipe to Catalytic Converter Bolts
M10 x 1.25Torque Value
Important Notes
Exhaust Mid Pipe Components
Torque specifications for mid-pipe sections and their connections. May include resonator and muffler inlet.
1 Mid Pipe Flange Bolts
M10 x 1.25
Mid Pipe Flange Bolts
M10 x 1.25Torque Value
Important Notes
2 Mid Pipe Support Bracket Bolts
M8 x 1.25
Mid Pipe Support Bracket Bolts
M8 x 1.25Torque Value
Important Notes
Exhaust Muffler Components
Torque specifications for the muffler and its mounting hardware, including connections to tailpipes and hangers.
1 Muffler Inlet Flange Bolts
M10 x 1.25
Muffler Inlet Flange Bolts
M10 x 1.25Torque Value
Important Notes
2 Muffler Hanger Bolts
M8 x 1.25
Muffler Hanger Bolts
M8 x 1.25Torque Value
Important Notes
Exhaust Tailpipe Components
Torque specifications for the tailpipe and its connection to the muffler.
1 Tailpipe to Muffler Bolts
M10 x 1.25
Tailpipe to Muffler Bolts
M10 x 1.25Torque Value
Important Notes
2 Tailpipe Bracket Bolts
M8 x 1.25
Tailpipe Bracket Bolts
M8 x 1.25Torque 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 are the stock exhaust specifications for the 2021-Present Acura TLX?
What are the stock exhaust specifications for the 2021-Present Acura TLX?
The 2021-Present Acura TLX generally features a dual exhaust system with variations depending on the trim level (e.g., base, A-Spec, Type S). The stock system typically includes a catalytic converter, resonators, and mufflers designed for a balance of performance and noise reduction. Specific pipe diameter and materials may vary. For exact specifications, it's best to consult the vehicle's service manual or an Acura dealership.
Q2 Is it possible to modify the exhaust system on my 2021-Present Acura TLX?
Is it possible to modify the exhaust system on my 2021-Present Acura TLX?
Yes, it's possible to modify the exhaust system. Common modifications include replacing mufflers, resonators, and/or catalytic converters with aftermarket parts to enhance the sound and potentially performance. However, be aware of potential warranty implications and local regulations concerning vehicle modifications.
Q3 Will aftermarket exhaust modifications void my Acura warranty?
Will aftermarket exhaust modifications void my Acura warranty?
Modifying your exhaust system could potentially void certain parts of your vehicle’s warranty, specifically those related to the exhaust system or any components affected by the modification. It's important to consult with your Acura dealer before making modifications to understand potential warranty implications. Some aftermarket manufacturers offer warranties that may cover affected components.
Q4 What is the difference between an axle-back, cat-back, and full exhaust system?
What is the difference between an axle-back, cat-back, and full exhaust system?
An 'axle-back' exhaust replaces the components from the rear axle back (typically the mufflers). A 'cat-back' system replaces components from the catalytic converter back, including resonators and mufflers. A 'full exhaust system' replaces all the exhaust components, often including catalytic converters, which can have significant implications for emissions and legality.
Q5 Does changing the exhaust system improve performance on my Acura TLX?
Does changing the exhaust system improve performance on my Acura TLX?
While some aftermarket exhaust systems claim to increase performance, the gains are often modest and may require other modifications to realize their full potential. In some cases, aftermarket exhausts primarily alter the sound profile of the vehicle rather than providing a significant boost in horsepower or torque. Be wary of exaggerated performance claims.
Q6 Where can I find the original equipment manufacturer (OEM) specifications for my 2021-Present Acura TLX exhaust?
Where can I find the original equipment manufacturer (OEM) specifications for my 2021-Present Acura TLX exhaust?
The official OEM specifications for your Acura TLX exhaust can typically be found in the vehicle's service manual, which can be ordered from an Acura dealership or an authorized service center. Additionally, you may find some information on Acura’s official website, although detailed component specifications are often restricted to service documentation.
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 (10-100 ft-lb)
Used for tightening exhaust fasteners to the manufacturer's specified torque. Prevents over-tightening and damage to components.
- Adjustable torque range
- Click-type mechanism
- Clearly marked scale
Torque Wrench (5-25 ft-lb)
Used for tightening smaller exhaust fasteners and sensor mounts to the manufacturer's specified torque. Prevents damage to sensitive components.
- Adjustable torque range
- Click-type mechanism
- Fine graduation scale
Exhaust Spring Hook Tool
Designed to safely and easily remove and install exhaust springs, which connect various exhaust sections.
- Ergonomic handle
- Durable construction
- Multiple hook positions
Oxygen Sensor Socket
Specialized socket with a slot to accommodate the oxygen sensor wiring, preventing damage during removal and installation.
- Slotted design
- Various sizes available
- Durable metal construction
Exhaust Pipe Cutter
Tool for cutting exhaust pipes cleanly and efficiently. Useful for custom exhaust work or replacing sections of pipe.
- Rotating cutting wheel
- Chain for wrapping around pipe
- Adjustable size settings
Penetrating Lubricant
Used to loosen corroded or seized exhaust fasteners, making removal easier and preventing damage to components.
- Fast-acting formula
- Rust dissolving properties
- Prevents breakage
Jack Stands
Heavy-duty stands used to safely support the vehicle during exhaust work, providing stable working conditions.
- Adjustable height settings
- Wide base for stability
- Rated weight capacity
Vehicle Lift (Optional)
Provides full access under the vehicle for easy exhaust system work, increasing safety and efficiency (optional, but highly recommended for professional shops).
- Variable height adjustment
- Safety locking mechanisms
- Robust construction
Service Procedures
Exhaust System Inspection
A comprehensive visual and physical inspection of the exhaust system for damage, leaks, or corrosion.
- Step 1: With the vehicle safely raised or on a lift, visually inspect all exhaust pipes, mufflers, resonators, and catalytic converters for rust, cracks, or holes.
- Step 2: Check all exhaust hangers and brackets for damage or looseness, ensuring the exhaust is securely mounted.
- Step 3: Examine all exhaust connections and gaskets for leaks or damage. Pay close attention to areas where exhaust components are joined.
- Step 4: Check all oxygen sensors for damage or loose connections.
- Step 5: Start the vehicle and listen for unusual exhaust noises, indicating a potential leak. Also, check for exhaust fumes coming from unusual locations.
Exhaust Component Replacement (Muffler)
Procedure for replacing a worn or damaged muffler on the Acura TLX.
- Step 1: Safely raise the vehicle using a lift or jack stands, making sure the vehicle is properly supported.
- Step 2: Apply penetrating lubricant to the exhaust fasteners connecting the muffler to the exhaust pipe and allow to soak for 10-15 minutes.
- Step 3: Remove the exhaust fasteners connecting the muffler to the exhaust pipe.
- Step 4: Disengage the muffler from the exhaust hangers and carefully remove the muffler from the vehicle.
- Step 5: Install the new muffler, ensuring all exhaust gaskets are replaced, and that the muffler is correctly aligned with exhaust hangers.
- Step 6: Install new hardware as needed and tighten all fasteners to the manufacturer's specified torque.
- Step 7: Start the vehicle and check for leaks at the connections. Adjust as necessary.
Oxygen Sensor Replacement
Procedure for replacing an oxygen sensor on the Acura TLX, commonly performed due to sensor failure or age.
- Step 1: Safely raise the vehicle using a lift or jack stands. Let the vehicle cool down if recently run.
- Step 2: Locate the oxygen sensor to be replaced. Disconnect the sensor wiring harness connector.
- Step 3: Use the oxygen sensor socket to carefully remove the old sensor from the exhaust system.
- Step 4: Apply a thin coating of anti-seize compound to the threads of the new oxygen sensor, and install the new sensor into the exhaust system using the oxygen sensor socket.
- Step 5: Tighten the new sensor to the manufacturer's specified torque.
- Step 6: Reconnect the sensor wiring harness connector.
- Step 7: Start the vehicle and verify no check engine light related to oxygen sensors. If any codes appear, clear them and run the system to ensure the fix was successful.
Technical Service Bulletins
Exhaust Rattle/Vibration at Low RPM
2023-03-15A small number of 2021-Present Acura TLX vehicles have experienced a rattle or vibration noise emanating from the exhaust system at low RPMs (around 1000-1500 RPM).
Resolution: Inspect the exhaust hangers and brackets for looseness or damage. Check and re-torque all exhaust fasteners to specification. If the rattle persists, replace the affected hangers and/or install additional sound dampening material around the exhaust system. Consult TSB for any updated part numbers and procedures.
Premature Exhaust Pipe Corrosion (Northern/Salt Belt Regions)
2022-11-01Some Acura TLX models in areas that use road salt may experience premature corrosion of exhaust pipes, particularly at the welds and near hangers.
Resolution: Inspect the exhaust system for corrosion. If corrosion is significant, replace the affected exhaust pipe sections. Apply rust preventative treatment to the affected areas. If the corrosion is deemed to be a manufacturing defect within the warranty period, refer to the manufacturer's warranty guidelines and procedures for replacement.
Oxygen Sensor Fault Codes - P0130, P0131, P0134, P0135
2021-09-20Specific oxygen sensor fault codes (P0130, P0131, P0134, P0135) have been reported on some Acura TLX models. These codes indicate a potential issue with the oxygen sensors and their circuitry.
Resolution: Inspect the oxygen sensor wiring and connectors for damage or corrosion. Verify the integrity of the oxygen sensor and connector pins. Replace the affected sensor and repair any wiring damage. Clear the codes and retest to ensure proper functionality.
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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.