Acura CL 1997-1999 Suspension Bolt Torque Specifications
This page provides detailed torque specifications for all suspension bolts on the 1997-1999 Acura CL. Proper torque is essential for safe and reliable vehicle operation. Includes values in both foot-pounds (ft-lbs) and Newton-meters (Nm).
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 Struts
Torque specifications for front strut and shock absorber mounting components.
1 Strut/Shock Absorber Mounting Bolts
M10 x 1.25
Strut/Shock Absorber Mounting Bolts
M10 x 1.25Torque Value
Important Notes
2 Lower Strut Fork Bolt to Lower Control Arm Bolt
M12 x 1.25
Lower Strut Fork Bolt to Lower Control Arm Bolt
M12 x 1.25Torque Value
Important Notes
3 Strut Piston Rod Nut
M14 x 1.5
Strut Piston Rod Nut
M14 x 1.5Torque Value
Important Notes
4 Upper Strut Mount Bolts to Body
M8 x 1.25
Upper Strut Mount Bolts to Body
M8 x 1.25Torque Value
Important Notes
Front Suspension Control Arms
Torque specifications for control arm mounting components.
1 Control Arm Bolts
M12 x 1.5
Control Arm Bolts
M12 x 1.5Torque Value
Important Notes
2 Ball Joint Nut
M12 x 1.25
Ball Joint Nut
M12 x 1.25Torque Value
Important Notes
Steering System
Torque specifications for steering components.
1 Tie Rod End Nut
M12 x 1.25
Tie Rod End Nut
M12 x 1.25Torque Value
Important Notes
Sway Bar System
Torque specifications for sway bar components.
1 Sway Bar Link Nut
M10 x 1.25
Sway Bar Link Nut
M10 x 1.25Torque Value
Important Notes
2 Sway Bar Mounting Bracket Bolts
M10 x 1.5
Sway Bar Mounting Bracket Bolts
M10 x 1.5Torque Value
Important Notes
Wheel Hub
Torque specifications for wheel hub and bearing components.
1 Wheel Hub/Bearing Bolts
M12 x 1.5
Wheel Hub/Bearing 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 Why is it important to use the correct torque specifications?
Why is it important to use the correct torque specifications?
Using the correct torque specifications ensures that the suspension components are properly secured without being over-tightened, which can lead to bolt failure or damage to the component. Under-tightening can result in loose parts and potential loss of control. Proper torque also maintains the intended design performance of the suspension system.
Q2 What type of lubricant should I use on suspension bolts?
What type of lubricant should I use on suspension bolts?
Generally, using a light coat of anti-seize on the threads of suspension bolts is a good practice, especially in areas prone to rust. However, it's crucial to understand that using lubricant affects torque readings. If your torque specs are for dry threads, you need to reduce your torque by approximately 20-25% when using lubricant, otherwise, you risk over-tightening. Always refer to the manufacturer's recommendations if they specify to use lubricant.
Q3 Can I reuse suspension bolts?
Can I reuse suspension bolts?
It's generally recommended to replace critical suspension bolts, especially those that are torque-to-yield bolts (these are designed to stretch and are not meant to be reused) or those that have been subject to significant stress or removal. Always consult your vehicle's service manual for specific recommendations on which bolts should be replaced and which can be reused. Reusing worn bolts can cause them to fail prematurely and compromise the suspension's integrity.
Q4 What tool is best to use for torquing suspension bolts?
What tool is best to use for torquing suspension bolts?
A torque wrench is essential for accurately torquing suspension bolts. Avoid using impact wrenches for final tightening, as they are difficult to control for precise torque values. Choose a torque wrench with the appropriate torque range for your vehicle's specifications. Calibration of your torque wrench should be performed periodically to ensure accuracy.
Q5 How often should I check the torque of my suspension bolts?
How often should I check the torque of my suspension bolts?
It's a good practice to recheck the torque of your suspension bolts after approximately 100-500 miles after doing suspension work, as this allows the components to settle. Regular inspection should be included in routine maintenance, particularly after encountering rough roads or heavy use. A visual check for loose or missing fasteners is recommended during regular tire rotations.
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 calibrated torque wrench is essential for accurate tightening of suspension bolts.
- Wide torque range (typically 20-150 ft-lbs)
- Click-type mechanism for precise readings
- 1/2 inch drive size for compatibility with common sockets
Socket Set (Metric)
A comprehensive set of metric sockets is needed to fit the various bolt heads in the suspension system.
- Includes common sizes such as 10mm, 12mm, 14mm, 17mm, 19mm
- 6-point sockets for secure grip
- Durable chrome vanadium construction
Breaker Bar (1/2" Drive)
Used to loosen stubborn bolts before using a torque wrench.
- Provides extra leverage for difficult bolts
- Durable construction
- 1/2 inch drive size
Service Procedures
Front Lower Control Arm Bolt Torque Procedure
Procedure for torquing the bolts that attach the front lower control arm to the vehicle's frame and knuckle.
- Raise and safely support the vehicle using jack stands.
- Locate the front lower control arm bolts: one connecting to the frame and one connecting to the knuckle.
- Using a suitable socket and breaker bar, loosen the bolts (if previously tightened).
- Using a torque wrench, tighten the bolt connecting to the frame to 47 ft-lbs (64 N-m)
- Using a torque wrench, tighten the bolt connecting to the knuckle to 47 ft-lbs (64 N-m)
- Recheck torque values after driving the vehicle for 50 miles.
Front Shock Absorber/Strut Upper Mount Torque Procedure
Procedure for torquing the nuts that attach the front shock absorber/strut to the upper mount.
- Raise and safely support the vehicle using jack stands.
- Locate the upper strut mount nuts
- Using a suitable socket and breaker bar, loosen the nuts (if previously tightened).
- Using a torque wrench, tighten the strut mount nuts to 22 ft-lbs (30 N-m).
- Recheck torque values after driving the vehicle for 50 miles.
Rear Trailing Arm Bolt Torque Procedure
Procedure for torquing the bolts that attach the rear trailing arm to the vehicle's frame and hub.
- Raise and safely support the vehicle using jack stands.
- Locate the rear trailing arm bolts: one connecting to the frame and one connecting to the hub.
- Using a suitable socket and breaker bar, loosen the bolts (if previously tightened).
- Using a torque wrench, tighten the bolt connecting to the frame to 80 ft-lbs (108 N-m)
- Using a torque wrench, tighten the bolt connecting to the hub to 40 ft-lbs (54 N-m)
- Recheck torque values after driving the vehicle for 50 miles.
Rear Lower Control Arm Bolt Torque Procedure
Procedure for torquing the bolts that attach the rear lower control arm to the vehicle's frame and knuckle.
- Raise and safely support the vehicle using jack stands.
- Locate the rear lower control arm bolts: one connecting to the frame and one connecting to the knuckle.
- Using a suitable socket and breaker bar, loosen the bolts (if previously tightened).
- Using a torque wrench, tighten the bolt connecting to the frame to 40 ft-lbs (54 N-m)
- Using a torque wrench, tighten the bolt connecting to the knuckle to 40 ft-lbs (54 N-m)
- Recheck torque values after driving the vehicle for 50 miles.
Technical Service Bulletins
Suspension Bolt Re-Torque Recommendation
2001-03-15A service bulletin recommending re-torquing all suspension bolts after a certain mileage due to potential settling and bolt loosening.
Resolution: Re-torque all suspension bolts to specified torque values after 1,000 miles of initial service or repair. Then re-torque annually or every 12,000 miles.
Lower Control Arm Bolt Failure Advisory
2000-09-20Technical bulletin warning of potential failure of the lower control arm bolt, particularly when over-torqued or reused multiple times
Resolution: Inspect lower control arm bolts for damage or excessive wear. Replace if necessary. Always use new bolts for all lower control arm service and torque them to the specified value.
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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.