Cadillac 15942198 Front Brake Rotor

To inspect and replace brake discs, first loosen the wheel lug nuts, raise the vehicle, and support it securely on jackstands. Remove the brake caliper and visually check the disc surface for damage. Deep score marks or cracks may require disc refinishing or replacement. To check disc runout, place a dial indicator at a point about 1/2-inch from the outer edge of the disc. It's critical that the disc not be machined to a thickness under the specified minimum thickness, which can be checked with a micrometer. To remove the disc, remove the caliper mounting bracket bolts and slide the disc off the hub. To install the new disc, place it in position over the threaded studs, install the mounting bracket and brake pads, and then install the caliper onto the mounting bracket. Finally, install the wheel and lug nuts, lower the vehicle, and depress the brake pedal a few times to bring the brake pads into contact with the disc.

Installation is the reverse of removal. Make sure to tighten the caliper mounting bracket and wheel lug nuts to the correct torque specifications. Lower the vehicle and ensure everything is securely in place.

Look for any score marks or damage on the disc surface. Check both sides of the disc.

The first step is to loosen the wheel lug nuts.