Acura TL 2004-2008 Suspension Bolt Torque Specifications
This page provides a comprehensive list of torque specifications for all suspension-related bolts on the 2004-2008 Acura TL. Includes front and rear suspension components.
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
Front Suspension
Torque specifications for front suspension components.
1 Strut/Shock Absorber Top Mounting Bolts
M10 x 1.25
Strut/Shock Absorber Top Mounting Bolts
M10 x 1.25Torque Value
Important Notes
2 Front Lower Shock Mount Bolt to Knuckle
M14 x 1.5
Front Lower Shock Mount Bolt to Knuckle
M14 x 1.5Torque Value
Important Notes
3 Front Upper Control Arm Ball Joint Nut
M12 x 1.25
Front Upper Control Arm Ball Joint Nut
M12 x 1.25Torque Value
Important Notes
4 Lower Control Arm Bolts
M14 x 1.5
Lower Control Arm Bolts
M14 x 1.5Torque Value
Important Notes
5 Sway Bar Link Nut
M10 x 1.25
Sway Bar Link Nut
M10 x 1.25Torque Value
Important Notes
6 Tie Rod End Nut
M12 x 1.25
Tie Rod End Nut
M12 x 1.25Torque Value
Important Notes
Rear Suspension
Torque specifications for rear suspension components.
1 Rear Shock Lower Mounting Bolt
M14 x 1.5
Rear Shock Lower Mounting Bolt
M14 x 1.5Torque Value
Important Notes
2 Rear Upper Control Arm Inner Bolts
M12 x 1.25
Rear Upper Control Arm Inner Bolts
M12 x 1.25Torque Value
Important Notes
3 Rear Lower Control Arm Inner Bolts
M12 x 1.25
Rear Lower Control Arm Inner Bolts
M12 x 1.25Torque Value
Important Notes
4 Rear Knuckle Bolts
M12 x 1.25
Rear Knuckle Bolts
M12 x 1.25Torque Value
Important Notes
Subframe
Torque specifications for subframe components.
1 Subframe Bolts
M14 x 1.5
Subframe Bolts
M14 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 is using the correct torque specification important for suspension bolts?
Why is using the correct torque specification important for suspension bolts?
Using the correct torque specification is crucial for several reasons. Over-tightening can stretch or break bolts, potentially causing component failure and affecting suspension geometry, leading to poor handling and safety issues. Under-tightening can allow components to move, leading to premature wear, noise, and eventual failure. Proper torque ensures a secure and stable connection, maintaining the designed performance and safety of the suspension system. For example, an incorrectly torqued lower control arm bolt can shift under load, affecting wheel alignment.
Q2 Should I use new bolts when working on the suspension?
Should I use new bolts when working on the suspension?
It's highly recommended to use new bolts, especially for critical suspension components like control arms, ball joints, and strut mounts. Many bolts, especially torque-to-yield bolts, are designed for single use and can stretch upon tightening. Reusing old bolts can compromise their integrity, leading to premature failure. Always refer to the Acura service manual for specific recommendations on bolt replacement.
Q3 What type of lubricant should I use on suspension bolts?
What type of lubricant should I use on suspension bolts?
Unless specifically instructed otherwise in the Acura service manual, most suspension bolts should be installed clean and dry. Applying lubricant to the threads when not specified can result in incorrect torque readings as the lubricant alters the friction between the threads, potentially leading to over-tightening and failure. Refer to the service manual for specific instructions for each bolt.
Q4 What is the difference between Nm and lb-ft?
What is the difference between Nm and lb-ft?
Nm (Newton-meters) and lb-ft (pound-feet) are units of torque. Nm is the metric unit commonly used in European and Asian vehicles, while lb-ft is the imperial unit often used in North America. A torque wrench will have these two units available. Using the wrong unit will cause incorrect torque. Example: 100 Nm is approximately 74 lb-ft, not 100 lb-ft.
Q5 What should I do if I suspect I have over-torqued a bolt?
What should I do if I suspect I have over-torqued a bolt?
If you suspect you have over-torqued a bolt, especially a critical suspension bolt, it is best practice to replace it with a new one. Over-tightening can weaken the bolt, increasing the risk of failure. If the bolt is a torque-to-yield bolt, it should always be replaced after being tightened once. If you cannot replace the bolt, loosen it and retighten to the correct torque spec. Visually inspect the area around the bolt for damage.
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 suspension bolts to the manufacturer's specified torque settings. Using a torque wrench prevents over-tightening, which can damage components, and under-tightening, which can lead to component failure.
- Adjustable torque settings
- Click-type mechanism for accurate torque application
- Appropriate torque range for suspension components
Socket Set
A comprehensive socket set is needed to match the various bolt head sizes found in the suspension system. Ensure the set includes both standard and metric sizes, and deep sockets for access to recessed fasteners.
- Metric and SAE sizes
- Standard and deep sockets
- Durable construction
Breaker Bar
A breaker bar can be used to loosen stubborn or corroded suspension bolts. It provides additional leverage compared to a standard ratchet.
- Long handle for increased leverage
- Durable construction
- 1/2 inch or 3/8 inch drive compatibility
Extension Bars
Extension bars are used to reach fasteners that are recessed or difficult to access within the suspension assembly. Different lengths can be beneficial for varying access situations.
- Various lengths for flexibility
- Durable construction
- 1/2 inch or 3/8 inch drive compatibility
Service Procedures
Front Lower Control Arm Bolt Torque Procedure
This procedure outlines how to properly torque the bolts securing the front lower control arm to the frame and steering knuckle.
- Loosen, but do not remove, all bolts securing the lower control arm.
- Position the vehicle with the suspension loaded. This is the most critical step for a proper torque, since if the suspension is unloaded, the rubber bushings will be tightened in an improper position
- Torque the front lower control arm to frame bolts to 70 lb-ft (95 Nm).
- Torque the front lower control arm to steering knuckle bolt to 47 lb-ft (64 Nm).
- Recheck all bolts to ensure they meet the specified torque values.
Front Strut Mount Bolt Torque Procedure
This procedure outlines how to properly torque the bolts securing the front strut mount to the vehicle chassis.
- Loosely install the bolts securing the strut mount to the vehicle chassis.
- Torque the strut mount to chassis bolts to 36 lb-ft (49 Nm).
- Recheck all bolts to ensure they meet the specified torque values.
Rear Upper Control Arm Bolt Torque Procedure
This procedure outlines how to properly torque the bolts securing the rear upper control arm to the frame and knuckle.
- Loosely install all the bolts securing the upper control arm.
- Position the vehicle with the suspension loaded
- Torque the rear upper control arm to frame bolt to 70 lb-ft (95 Nm).
- Torque the rear upper control arm to knuckle bolt to 47 lb-ft (64 Nm).
- Recheck all bolts to ensure they meet the specified torque values.
Rear Lower Control Arm Bolt Torque Procedure
This procedure outlines how to properly torque the bolts securing the rear lower control arm to the frame and knuckle.
- Loosely install all the bolts securing the lower control arm.
- Position the vehicle with the suspension loaded.
- Torque the rear lower control arm to frame bolts to 70 lb-ft (95 Nm).
- Torque the rear lower control arm to knuckle bolt to 47 lb-ft (64 Nm).
- Recheck all bolts to ensure they meet the specified torque values.
Technical Service Bulletins
Premature Bushing Wear in Front Lower Control Arms
2006-05-15Some 2004-2006 Acura TL vehicles may experience premature wear of the front lower control arm bushings. This bulletin advises checking the torque of the control arm bolts as a potential contributing factor.
Resolution: Inspect bushings for wear and verify correct torque of lower control arm bolts.
Rear Suspension Noise and Component Play
2007-11-20Reports of rear suspension noises and play have been linked to loose or improperly torqued control arm bolts. This bulletin recommends a thorough inspection and proper torque of all rear suspension fasteners.
Resolution: Inspect all rear suspension components, paying close attention to the control arm bolts. Ensure they are torqued to the correct 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.