Brake Rotor Replacement
How are brake rotor issues diagnosed?
Trained technicians have seen hundreds, if not thousands, of brake rotors through their careers and training. The signs they look for when disc brakes are suspected of failure are deep grooves, stress fractures, and a blue color indicating the brake rotor has exceeded the allowable heat range. If any of these conditions exist, the technician will recommend replacement, or machining if appropriate.
How is a brake rotor replaced?
To replace a brake rotor, the wheel, brake caliper, and a retaining screw must be removed from the vehicle. The replacement rotor is installed by sliding onto the hub and bearing assembly, and cleaned before installing the brake caliper and brake pads. Wheel nuts, also called lug nuts, must be tightened to the manufacturer specification.
RepairPal Recommendations for brake rotor issues
When replacing a brake rotor, it is important to replace the corresponding rotor on the other side of the vehicle. This will ensure the braking power is even and predictable. Brake pads show wear patterns after many times of grinding into the old brake rotor, and must be replaced to avoid brake noise, uneven braking pressure, and unpredictable braking performance.
What to look out for when dealing with brake rotor issues
Some brake rotors are mounted onto the wheel bearings, and those bearings should be repacked with grease or replaced when the rotor is removed. Any grease or automotive fluid besides water on the brake rotor will instantly contaminate the brake pad, necessitating replacement of the pads. To avoid this, the new rotors should be cleaned with brake parts cleaner prior to installation of the brake pads and caliper.