Kia 517123C100 Disc-Front Brake

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Loosen the wheel lug nuts, raise the vehicle, and support it securely on jackstands. Remove the wheel and install the lug nuts to hold the disc in place, releasing the parking brake if working on the rear brake disc. Remove the brake caliper without disconnecting the brake hose, suspending it out of the way with a piece of wire after removing the caliper bolts. Take out the caliper bracket bolts and remove the bracket. Visually inspect the disc surface for score marks and damage; light scratches are normal, but deep scoring over 0.039-inch requires disc removal and refinishing. Check both sides of the disc, noting that severe wear may necessitate replacement. To check disc run out, place a dial indicator about 1/2-inch from the outer edge, set it to zero, and turn the disc, ensuring the reading does not exceed the allowable limit. Resurfacing is recommended whenever pads are replaced to ensure a smooth finish and eliminate brake pedal pulsation. If not resurfacing, remove glaze with sandpaper or emery cloth using a swirling motion. Ensure the disc is not machined below the minimum allowable refinish thickness, which is cast into the inside of the disc, and measure thickness with a micrometer. Remove the lug nuts holding the disc in place, take out the Phillips-head screws, and slide the disc off the hub. If the rear disc is stuck, remove the plug and rotate the adjuster to back the parking brake shoes away from the drum surface. Place the new disc over the threaded studs, install the caliper and tighten the bolts to the specified torque, bleeding only if the brake hose was disconnected. For rear discs, adjust the parking brake shoes, then install the wheel and lug nuts, lower the vehicle, and tighten the lug nuts to the specified torque.