FAQ for Brake Disc Repair
Q: What tools are needed to replace the Front Brake Rotor (J55)?
A:
You will need J 41013 Rotor Resurfacing Kit and J 42450-A Wheel Hub Resurfacing Kit.
By BobGM Specialist
01/11/2022 Q: How to burnish the brake pads and rotors?
A:
You can select a smooth road with little or no traffic, then accelerate the vehicle to 48 km/h (30 mph), next using moderate to firm pressure, apply the brakes to bring the vehicle to a stop, then repeat steps 2 and 3 until approximately 20 stops have been completed, and allow sufficient cooling periods between stops to properly burnish the brake pads and rotors.
By BobGM Specialist
01/11/2022 Q: What must be measured before refinishing a brake rotor?
A:
You will need to make sure that the rotor must be checked for adequate thickness to allow the rotor to be refinished and remain above the minimum allowable thickness after refinishing specification.
By BobGM Specialist
01/11/2022 Q: What tools are needed to remove the rust or corrosion on the hub?
A:
You will need J 42450-A.
By BobGM Specialist
01/11/2022 Q: What tools are needed if I service the rotor?
A:
You will need J 42450-A to clean the contact area of the wheel bearing/hub.
By BobGM Specialist
01/11/2022 Q: What tools are needed to remove the rust or corrosion from the mating surface of the rotor to the hub?
A:
You will need J 41013.
By BobGM Specialist
01/11/2022 Q: Is it okay to leave the caliper/pads installed while cutting rotors using an on-car lathe?
A:
On-car lathes should never be used with the pads and calipers installed on the vehicle. The debris from cutting the rotors can contaminate the brake pads/calipers which can lead to other brake concerns and comebacks.
By BobGM Specialist
01/11/2022 Q: What's the recommended torque for the mounting screw?
A:
The recommended torque is 12 N.m (106 lb-ft).
By BobGM Specialist
01/11/2022 Q: Which lathe is essential for performing brake work, the bench or the on-car?
A:
Dealers must have a well-maintained bench lathe and a well-maintained on-car lathe. These lathes need to be calibrated monthly. BOTH lathes are essential to providing quality brake service.
By BobGM Specialist
01/11/2022 Q: What's the preliminary procedure for replacing the Rear Brake Rotor (J55)?
A:
The procedure is to raise the vehicle, and remove the tire and wheel, next remove the brake caliper mounting bracket.
By BobGM Specialist
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