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Home/Cars/Genesis/G70/1st Gen (2018-Present)/why does my Genesis G70 make a grinding noise when I brake?

why does my Genesis G70 make a grinding noise when I brake?

Genesis G70 1st Gen (2018-Present)

Severity: highDifficulty: medium1-3 hours
3 min read
489 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

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

Component
Brakes
Repair Time
1-3 hours

Safety Warnings

  • ⚠Ensure the vehicle is securely supported on jack stands before working underneath it.
  • ⚠Allow the brake components to cool before handling to avoid burns.

Symptoms

  • •Grinding noise when applying brakes
  • •Reduced braking performance
  • •Vibration or pulsation in the brake pedal
  • •Warning light illuminated on the dashboard
  • •Excessive dust or debris on wheels

Diagnostic Steps

  1. 1Inspect brake pads for wear, ensuring they are within manufacturer specifications.
  2. 2Check brake rotors for scoring, warping, or excessive wear.
  3. 3Examine brake calipers for proper function and any signs of sticking or damage.
  4. 4Inspect brake fluid level and condition in the master cylinder.
  5. 5Check for any debris or contaminants on the brake components.

Solution

Solution

1. Preparation

  • Tools Needed: Jack and jack stands, lug wrench, brake pad gauge, torque wrench, brake cleaner.
  • Lift the vehicle using a jack and secure it on jack stands.
  • Remove the wheel using the lug wrench.

2. Inspect Brake Pads

  • Remove the brake caliper bolts using the appropriate socket.
  • Carefully slide the caliper off the rotor and support it with a bungee cord (do not let it hang by the brake line).
  • Remove the brake pads from the caliper bracket.
  • Check the thickness of the brake pads. Replace if they are below the manufacturer's minimum thickness (usually around 3mm).

3. Inspect Brake Rotors

  • Check the surface of the rotor for grooves or scoring using the brake pad gauge.
  • Measure the rotor thickness using a micrometer. If it is below the minimum specification, replace the rotor.

4. Reassemble Components

  • If pads or rotors are replaced, clean the mating surfaces of the rotor and caliper bracket with brake cleaner.
  • Apply anti-squeal lubricant to the back of the new brake pads (if applicable).
  • Reinstall the brake pads and slide the caliper back into place.
  • Torque the caliper bolts to the manufacturer’s specifications.

5. Final Steps

  • Reinstall the wheel and torque the lug nuts to the manufacturer's specifications.
  • Lower the vehicle off the jack stands.

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 and jack stands
  • Lug wrench
  • Brake pad gauge
  • Torque wrench
  • Brake cleaner

Parts Required

  • Brake pads (if worn)
  • Brake rotors (if damaged)

Additional Information

Component

Brakes

Repair Time

1-3 hours

Difficulty

medium

Severity

high

Tools

5 items

Parts

2 items

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