Preparation:
- Park the vehicle on a flat and stable surface.
- Engage the parking brake and chock the rear wheels to prevent the car from rolling.
- Loosen the lug nuts on the wheel where you will be replacing the disc, but do not remove them completely.
Step 1: Remove the Wheel:
- Use a jack to safely raise the vehicle until the tire is off the ground.
- Remove the lug nuts completely and take off the wheel.
Step 2: Remove the Brake Caliper:
- Locate the brake caliper, which is mounted to the steering knuckle.
- Remove the bolts that hold the caliper in place.
- Carefully remove the caliper and hang it using a strong wire or hook to avoid damaging the brake line.
Step 3: Remove the Old Disc:
- Remove the two bolts holding the disc to the wheel hub.
- Pull the disc straight off the hub. If it is stuck, you may need to tap it gently with a rubber mallet.
Step 4: Inspect the Hub and Clean the Area:
- Check the wheel hub for any damage or excessive wear.
- Use a wire brush or emery cloth to remove any rust, dirt, or build-up from the hub.
Step 5: Install the New Disc:
- Place the new disc onto the hub, ensuring that it sits flush against the hub surface.
- Install the two bolts that hold the disc in place, but do not tighten them completely yet.
Step 6: Reinstall the Brake Caliper:
- Carefully lift the brake caliper back into position and align the caliper pins with the mounting holes on the steering knuckle.
- Secure the caliper using the bolts removed earlier and tighten them.
Step 7: Tighten the Disc Mounting Bolts:
- Tighten the two bolts that hold the disc to the wheel hub securely using a torque wrench. Refer to the vehicle's repair manual for the specified torque.
Step 8: Reinstall the Wheel:
- Place the wheel back on the hub and hand-tighten the lug nuts.
- Lower the vehicle using the jack until it is firmly on the ground.
- Tighten the lug nuts fully using a lug wrench in a star pattern to ensure even tightening.
Step 9: Test the Brakes:
- Pump the brake pedal several times until you feel resistance to build pressure in the brake lines.
- Test the brakes by driving the vehicle slowly and making sure they respond properly.
Step 10: Road Test:
- Take the car for a short road test to ensure that the brakes are functioning correctly.
Note: It is recommended to replace the brake pads at the same time as the discs to ensure optimal braking performance. Always follow the vehicle's specific repair manual or consult with a qualified mechanic if you are unsure about any of these steps.
