Cadillac 15712803 Rear Brake Rotor

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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.

If the disc has excessive runout, it should be refinished.

The first step is to loosen the wheel lug nuts.

Disc runout can be checked by placing a dial indicator at a point about 1/2-inch from the outer edge of the disc.

Remove the brake calipers without disconnecting the brake hoses and hang them out of the way. On newer models, remove the caliper mounting bracket.

After installing the new disc, the wheel and lug nuts should be installed, the vehicle should be lowered, and the brake pedal should be depressed a few times to bring the brake pads into contact with the disc.