why does my Genesis G70 make a thumping noise when turning

Genesis G70 IG (2017-2023)

Error Codes

3-5 hours

Time

medium

Difficulty

medium

Severity

3 min read

588 words

Problem Statement

Learn how to diagnose and fix thumping noise when turning in Genesis G70. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Suspension

Estimated Time

3-5 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always use wheel chocks to prevent the vehicle from rolling.
•Always disconnect the battery before working on electrical systems.
•Allow the vehicle to cool before working under it to avoid burns.

Symptoms

•Thumping noise when turning the steering wheel
•Noise may vary with speed or steering angle
•Possible vibration felt through the steering wheel
•Clunking sound when hitting bumps or potholes
•Difficulty in steering or feeling of looseness in the steering wheel

Diagnostic Steps

1
Inspect the tires for uneven wear or damage.
2
Check the wheel lug nut torque to ensure they are properly tightened.
3
Examine the suspension components, including control arms and bushings, for wear or damage.
4
Inspect the CV joints and axles for signs of wear or damage.
5
Test the power steering fluid level and check for leaks in the steering system.
6
Evaluate the steering rack for any play or looseness.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Jack
•Jack stands
•Socket set
•Torque wrench
•Bushing press

Parts Required

•Control arms (if needed)
•Suspension bushings (if needed)
•CV axle (if needed)
•Power steering fluid

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Diagnostic Steps

1
Inspect the tires for uneven wear or damage.
2
Check the wheel lug nut torque to ensure they are properly tightened.
3
Examine the suspension components, including control arms and bushings, for wear or damage.
4
Inspect the CV joints and axles for signs of wear or damage.
5
Test the power steering fluid level and check for leaks in the steering system.
6
Evaluate the steering rack for any play or looseness.

Solution

1. Preparation

Gather tools such as a jack, jack stands, socket set, and torque wrench.
Ensure the vehicle is parked on a level surface and the engine is off.
Safety Warning: Always use wheel chocks to prevent the vehicle from rolling.

2. Inspect and Replace Suspension Components

Inspect Control Arms and Bushings
- Remove the wheel using a socket set.
- Visually inspect control arms and bushings for cracks or excessive wear.
- If damaged, remove the old control arm by unbolting it from the chassis and the steering knuckle.
- Install the new control arm and torque bolts to manufacturer specifications (typically around 60-70 ft-lbs).
Check and Replace Any Worn Out Bushings
- Remove the control arm if bushings need replacement.
- Use a bushing press to install new bushings.

3. Inspect and Replace CV Joints

Inspect CV Joints and Axles
- Look for torn boots or grease leakage around the CV joints.
- If damaged, remove the axle from the hub and the transmission.
- Replace with a new axle, ensuring it is seated properly in the transmission and hub.

4. Steering System Check

Check Power Steering System
- Inspect the power steering fluid reservoir for low fluid levels.
- If low, top off with the appropriate power steering fluid as per the manufacturer’s specifications.
- Check for leaks in hoses and connections. Replace any damaged hoses.

5. Reassemble and Test

Reinstall the wheel and torque lug nuts to specifications (usually around 80-100 ft-lbs).
Lower the vehicle and take it for a test drive to confirm the noise has been resolved.