my Volvo XC90 makes a grinding noise when I brake, what does it mean?

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface and secure it with wheel chocks.
• Disconnect the negative battery terminal to avoid electrical shorts.

2. Remove Wheel

• Use a jack to lift the front or rear wheel (depending on the noise source).
• Secure the vehicle with jack stands.
• Use a lug wrench to remove the lug nuts and take off the wheel.

3. Inspect Brake Components

• Visually inspect the brake pads; replace if less than 1/8 inch is left.
• Check the rotors for grooves or excessive wear; replace if necessary.
• Ensure calipers are functioning properly and are not sticking.

4. Replace Brake Pads and Rotors (if necessary)

• Brake Pads:

  • Remove the caliper bolts using a socket set.
  • Slide the caliper off the rotor and support it with a bungee cord.
  • Remove the old brake pads and replace with new ones.
  • Reinstall the caliper and torque bolts to manufacturer specifications (typically around 25-35 ft-lbs).

• Brake Rotors:

  • Remove the old rotor by unscrewing any retaining screws.
  • Install the new rotor, securing it with screws if applicable.

5. Reassemble and Test

• Reattach the wheel and hand-tighten lug nuts.
• Lower the vehicle and torque the lug nuts to the manufacturer's specifications (typically around 80-100 ft-lbs).
• Reconnect the battery terminal.