Acura TLX 2015-2020 Suspension Bolt Torque Specifications
Detailed torque specifications for all suspension bolts on the 2015-2020 Acura TLX, including 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 of a 2015-2020 Acura TLX.
1 Strut/Shock Absorber Upper Mounting Bolts
M10 x 1.25
Strut/Shock Absorber Upper Mounting Bolts
M10 x 1.25Torque Value
Important Notes
2 Strut/Shock Absorber Lower Mounting Bolt
M12 x 1.5
Strut/Shock Absorber Lower Mounting Bolt
M12 x 1.5Torque Value
Important Notes
3 Upper Control Arm Bolts
M12 x 1.75
Upper Control Arm Bolts
M12 x 1.75Torque Value
Important Notes
4 Lower Control Arm Bolts
M14 x 1.5
Lower Control Arm Bolts
M14 x 1.5Torque Value
Important Notes
5 Ball Joint Nut
M14 x 1.5
Ball Joint Nut
M14 x 1.5Torque Value
Important Notes
6 Lower Control Arm Ball Joint Pinch Bolt
M10 x 1.25
Lower Control Arm Ball Joint Pinch Bolt
M10 x 1.25Torque Value
Important Notes
7 Tie Rod End Nut
M12 x 1.25
Tie Rod End Nut
M12 x 1.25Torque Value
Important Notes
8 Sway Bar Link Nut
M10 x 1.25
Sway Bar Link Nut
M10 x 1.25Torque Value
Important Notes
9 Sway Bar Bushing Bracket Bolts
M8 x 1.25
Sway Bar Bushing Bracket Bolts
M8 x 1.25Torque Value
Important Notes
10 Steering Knuckle Bolts/Nuts
M14 x 1.5
Steering Knuckle Bolts/Nuts
M14 x 1.5Torque Value
Important Notes
Rear Suspension
Torque specifications for rear suspension components of a 2015-2020 Acura TLX.
1 Rear Trailing Arm Bolts
M14 x 1.5
Rear Trailing Arm 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 it important to use the correct torque specifications?
Why is it important to use the correct torque specifications?
Using the correct torque ensures proper clamping force, preventing components from loosening and causing potential failure. Over-torquing can damage bolts or threads, while under-torquing can lead to parts coming loose. Proper torque is critical for safe and reliable suspension operation. For example, if a lower control arm bolt is under-torqued, it can cause the suspension to shift and affect alignment, potentially leading to loss of control.
Q2 What happens if I over-torque a suspension bolt?
What happens if I over-torque a suspension bolt?
Over-torquing can stretch or damage the bolt, and may even cause it to shear or break. It can also damage the threads in the component it's being tightened into. This can lead to premature failure of the bolt or component, requiring costly repairs. For instance, over-tightening a strut tower bolt could lead to thread damage or a weakened mounting point.
Q3 What happens if I under-torque a suspension bolt?
What happens if I under-torque a suspension bolt?
Under-torquing leaves the bolt susceptible to loosening over time, especially with the vibrations and stresses experienced by the suspension system. This can result in premature wear and tear, noises, alignment issues, and in extreme cases, component failure. As an example, an under-torqued sway bar link can come loose, leading to clunking sounds and reduced handling performance.
Q4 Should I use new bolts when reassembling suspension components?
Should I use new bolts when reassembling suspension components?
It is generally recommended to use new bolts, especially torque-to-yield bolts (TTY), whenever reassembling suspension components. These bolts are designed to stretch upon tightening and should not be reused, as they will not provide the correct clamping force. Always consult the vehicle's service manual for specific recommendations. For example, many lower control arm bolts are TTY and must be replaced when removed.
Q5 Do I need to perform an alignment after working on the suspension?
Do I need to perform an alignment after working on the suspension?
Yes, anytime suspension components are removed, loosened, or replaced, a wheel alignment should be performed. Even if you only remove a component and reinstall it, the alignment can be affected. This ensures proper handling and tire wear. Improper alignment can lead to uneven tire wear and potential safety hazards.
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 with a 1/2-inch drive is essential for accurately tightening suspension bolts to specified torque values.
- Wide torque range (e.g., 20-250 ft-lbs)
- Click-type mechanism for accurate torque application
- Durable construction for long-term use
Torque Wrench (3/8-inch Drive)
A 3/8-inch drive torque wrench is useful for smaller suspension bolts and fasteners.
- Torque range appropriate for smaller fasteners (e.g., 10-80 ft-lbs)
- Click-type mechanism
- Compact size for accessing tight spaces
Socket Set (Metric)
A comprehensive set of metric sockets is needed to fit the various sizes of suspension bolts and nuts.
- Includes standard and deep sockets
- Sizes ranging from 10mm to 24mm (or larger)
- Durable construction (e.g., chrome vanadium steel)
Wrench Set (Metric)
A set of metric wrenches for holding nuts while torquing bolts, and for accessing difficult spots.
- Includes standard sized wrenches for the range from 10mm to 24mm (or larger)
- Variety of wrench types, including open-ended, box-end, and combination wrenches
- Durable construction
Extension Bars
Extension bars are helpful for accessing bolts that are recessed or in hard-to-reach places.
- Available in various lengths (e.g., 3 inch, 6 inch, 10 inch)
- Durable construction
- Compatible with both 3/8 and 1/2 inch drive tools
Jack Stands
Jack stands are critical for safely supporting the vehicle while working on the suspension.
- Sturdy construction (e.g., steel)
- Adjustable height settings
- Weight capacity sufficient for the vehicle
Vehicle Jack
A hydraulic floor jack is needed to safely lift the vehicle.
- Robust lifting capacity
- Stable platform
- Smooth hydraulic action
Service Procedures
Front Lower Control Arm Bolt Torque Procedure
Procedure for torquing the front lower control arm bolts on a 2015-2020 Acura TLX.
- 1. Raise the vehicle using a hydraulic floor jack and secure with jack stands.
- 2. Locate the front lower control arm bolts.
- 3. Loosely install the bolt through the control arm and into the chassis.
- 4. Using the correct socket and torque wrench, torque the bolt to the manufacturer's specified value.
- 5. Repeat the process for any additional bolts.
- 6. Lower the vehicle and remove the jack stands.
Rear Upper Control Arm Bolt Torque Procedure
Procedure for torquing the rear upper control arm bolts on a 2015-2020 Acura TLX.
- 1. Raise the vehicle using a hydraulic floor jack and secure with jack stands.
- 2. Locate the rear upper control arm bolts.
- 3. Loosely install the bolt through the control arm and into the chassis.
- 4. Using the correct socket and torque wrench, torque the bolt to the manufacturer's specified value.
- 5. Repeat the process for any additional bolts.
- 6. Lower the vehicle and remove the jack stands.
Front Strut Assembly Bolt Torque Procedure
Procedure for torquing the front strut assembly mounting bolts on a 2015-2020 Acura TLX.
- 1. Raise the vehicle using a hydraulic floor jack and secure with jack stands.
- 2. Locate the strut mounting bolts (both to the body and to the knuckle).
- 3. Loosely install the bolts.
- 4. Using the correct socket and torque wrench, torque the bolts to the manufacturer's specified value.
- 5. Repeat for all strut assembly bolts.
- 6. Lower the vehicle and remove the jack stands.
Rear Shock Absorber Bolt Torque Procedure
Procedure for torquing the rear shock absorber mounting bolts on a 2015-2020 Acura TLX.
- 1. Raise the vehicle using a hydraulic floor jack and secure with jack stands.
- 2. Locate the rear shock absorber mounting bolts (both top and bottom).
- 3. Loosely install the bolts.
- 4. Using the correct socket and torque wrench, torque the bolts to the manufacturer's specified value.
- 5. Repeat for all shock absorber bolts.
- 6. Lower the vehicle and remove the jack stands.
Technical Service Bulletins
Suspension Noise and Abnormal Wear
2017-06-15A bulletin regarding front suspension noises, which may be caused by improper torque of lower control arm bolts. Also addresses premature bushing wear.
Resolution: Inspect lower control arm bushings for wear or damage. Ensure all bolts are tightened to the correct torque specifications using a calibrated torque wrench. Replace any damaged components and perform a wheel alignment if needed.
Rear Suspension Alignment Issues
2018-03-20A bulletin addressing reports of rear suspension alignment issues and premature tire wear, often linked to improperly torqued upper control arm bolts.
Resolution: Inspect rear upper control arm bolts. Tighten all bolts to the correct torque values. Perform a thorough four-wheel alignment. If necessary, replace any damaged suspension components.
Strut Mounting Noise
2019-11-10A technical service bulletin concerning noise from the front strut assemblies, often traced back to loose or improperly torqued strut mounting bolts.
Resolution: Inspect the front strut mounting bolts, including those connecting the strut to the vehicle body and to the steering knuckle. Torque all bolts to the manufacturer's specified torque values, and replace any worn components 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.