Acura TSX 2009-2014 Exhaust System Bolt Torque Specifications
Detailed torque specifications for all exhaust bolts on the 2009-2014 Acura TSX, including manifold, downpipe, and cat-back exhaust bolts.
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 and headers
This subsystem includes the exhaust manifold, headers, and their connections to the engine block and cylinder head.
1 Exhaust Manifold/Headers to Engine Block Bolts
M12 x 1.5
Exhaust Manifold/Headers to Engine Block Bolts
M12 x 1.5Torque Value
2 Exhaust Manifold/Headers to Cylinder Head Bolts
M10 x 1.25
Exhaust Manifold/Headers to Cylinder Head Bolts
M10 x 1.25Torque Value
Exhaust pipe and muffler
This subsystem includes the exhaust pipe, muffler, and their connections.
1 Exhaust Pipe to Exhaust Manifold/Headers Bolts
M12 x 1.5
Exhaust Pipe to Exhaust Manifold/Headers Bolts
M12 x 1.5Torque Value
2 Muffler to Exhaust Pipe Bolts
M12 x 1.5
Muffler to Exhaust Pipe Bolts
M12 x 1.5Torque Value
Catalytic converter and oxygen sensor
This subsystem includes the catalytic converter, oxygen sensor, and their connections.
1 Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.25
Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.25Torque Value
2 Oxygen Sensor Bolts
M8 x 1.25
Oxygen Sensor Bolts
M8 x 1.25Torque Value
Important Notes
Exhaust system mounting and heat shields
This subsystem includes the exhaust system mounting brackets, heat shields, and their connections.
1 Exhaust System Mounting Bracket Bolts
M14 x 1.5
Exhaust System Mounting Bracket Bolts
M14 x 1.5Torque Value
Important Notes
2 Heat Shield Bolts
M8 x 1.25
Heat Shield Bolts
M8 x 1.25Torque Value
Important Notes
Exhaust pipe flanges
This subsystem includes the exhaust pipe flanges and their connections.
1 Exhaust Pipe Flange Bolts
M12 x 1.5
Exhaust Pipe Flange Bolts
M12 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 What are the torque specifications for the exhaust system bolts on a 2009-2014 Acura TSX?
What are the torque specifications for the exhaust system bolts on a 2009-2014 Acura TSX?
Typically, the exhaust manifold bolts should be torqued to 23 lb-ft (31 Nm). The exhaust pipe flange bolts (connecting sections of the exhaust) are usually tightened to 16 lb-ft (22 Nm). Always double-check with your vehicle's service manual as these values can sometimes vary slightly.
Q2 Why is it important to use a torque wrench when tightening exhaust bolts?
Why is it important to use a torque wrench when tightening exhaust bolts?
Using a torque wrench ensures that the bolts are tightened to the manufacturer's specified torque. Over-tightening can cause the bolts to break, strip the threads, or deform flanges, leading to leaks and potential damage. Under-tightening can lead to leaks and bolts coming loose over time due to vibrations and heat cycling. Consistent and correct torque is vital for a secure and leak-free exhaust system.
Q3 What happens if I over-tighten the exhaust bolts?
What happens if I over-tighten the exhaust bolts?
Over-tightening exhaust bolts can stretch or break the bolt itself, damage the threads in the exhaust flange or engine block, and distort the flange surface, leading to exhaust leaks. This can also make future removal difficult, requiring drilling out damaged bolts or repairing threads. Over-tightening often requires a significant repair.
Q4 What happens if I under-tighten exhaust bolts?
What happens if I under-tighten exhaust bolts?
Under-tightened bolts will not provide sufficient clamping force between flanges, leading to exhaust leaks. These leaks can cause exhaust fumes to enter the cabin, affect performance, and potentially damage other components. Loose bolts are also prone to vibration and can fall out, creating a dangerous situation.
Q5 Should I use anti-seize on exhaust bolts?
Should I use anti-seize on exhaust bolts?
Yes, it is highly recommended to apply a thin layer of high-temperature anti-seize compound on the threads of exhaust bolts before installation. This prevents corrosion and makes future removal much easier. The high temperature environment of the exhaust system promotes rust and seizing of metal, making future removal tedious if anti-seize is not used. Applying anti-seize also ensures more accurate torque readings as it reduces friction during bolt tightening.
Q6 What are the signs of an exhaust leak?
What are the signs of an exhaust leak?
Common signs of an exhaust leak include a loud hissing or rumbling noise, especially during acceleration, reduced engine performance, decreased fuel efficiency, and the smell of exhaust fumes inside the vehicle cabin. You might also notice soot or black deposits around joints in the exhaust system. If you suspect a leak, have your exhaust system inspected immediately.
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
A calibrated torque wrench is essential for accurately tightening exhaust bolts to the specified torque values, preventing leaks and damage.
- 1/2 inch drive
- Range covering 10-80 ft-lbs
Socket Set
A standard socket set containing the sizes necessary for the exhaust bolts and nuts on the 2009-2014 Acura TSX.
- Standard and metric sizes
- Includes 12mm, 14mm, and 17mm sockets
Extensions
Various length socket extensions for reaching hard-to-access bolts on the exhaust system.
- 3-inch and 6-inch extensions
- 1/2 inch drive
Anti-Seize Lubricant
Used on threads to prevent future corrosion and make removal easier.
- High-temperature rated
- Prevents galling
Service Procedures
Exhaust Manifold to Cylinder Head Bolt Tightening
Procedure for correctly tightening the exhaust manifold bolts to the cylinder head on a 2009-2014 Acura TSX.
- Apply a small amount of anti-seize lubricant to the threads of each bolt.
- Install the bolts by hand until they are snug.
- Using a torque wrench, tighten the bolts in a crisscross pattern to 23 ft-lbs (31 N-m).
- Double-check all bolts to ensure they are torqued correctly.
Front Pipe to Exhaust Manifold Bolt Tightening
Procedure for correctly tightening the bolts connecting the front pipe to the exhaust manifold on a 2009-2014 Acura TSX.
- Apply a small amount of anti-seize lubricant to the threads of each bolt.
- Install the bolts and nuts by hand until they are snug.
- Using a torque wrench, tighten the bolts and nuts evenly to 33 ft-lbs (45 N-m).
- Double-check all bolts and nuts to ensure they are torqued correctly.
Front Pipe to Catalytic Converter Bolt Tightening
Procedure for correctly tightening the bolts connecting the front pipe to the catalytic converter on a 2009-2014 Acura TSX.
- Apply a small amount of anti-seize lubricant to the threads of each bolt.
- Install the bolts and nuts by hand until they are snug.
- Using a torque wrench, tighten the bolts and nuts evenly to 33 ft-lbs (45 N-m).
- Double-check all bolts and nuts to ensure they are torqued correctly.
Exhaust Flange Bolt Tightening
Procedure for correctly tightening bolts on exhaust flanges.
- Apply a small amount of anti-seize lubricant to the threads of each bolt.
- Install the bolts and nuts by hand until they are snug.
- Using a torque wrench, tighten the bolts and nuts evenly to 33 ft-lbs (45 N-m).
- Double-check all bolts and nuts to ensure they are torqued correctly.
Technical Service Bulletins
Exhaust Leak Diagnosis and Repair
2011-05-15This bulletin provides diagnostic information and repair procedures for exhaust leaks on 2009-2014 Acura TSX models, including torque specifications.
Resolution: Check for leaks at flange connections. Inspect gaskets. Torque all bolts to specification.
Corrosion of Exhaust Fasteners
2013-02-28This bulletin addresses the issue of corrosion on exhaust system fasteners and provides preventative measures and replacement guidelines for 2009-2014 Acura TSX.
Resolution: Apply anti-seize lubricant during install or re-installation of exhaust fasteners. Inspect for corrosion and replace as needed
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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.