Acura 42510-SD4-930 Rear Disc Brake Rotor

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This procedure applies to both the front and rear brake discs on vehicles equipped with them. Begin by loosening the wheel nuts, raising the vehicle, and securely supporting it on jack stands. Remove the wheel and install two lug nuts with 3 mm thick washers under them to hold the disc in place, unless the two disc retaining screws are still in place. For rear disc removal, release the parking brake. Next, remove the front or rear brake caliper without disconnecting the brake hose, and suspend it out of the way with a piece of wire. Remove the caliper mounting bracket-to-steering knuckle bolts for the front or the bracket-to-spindle bolts for the rear, then take off the mounting bracket. Visually inspect the disc surface for scoring or damage; light scratches and shallow grooves are normal, but deep scoring over 0.015 inch requires refinishing. If pulsation during braking is noted, check for disc runout using a dial indicator placed about 1/2-inch from the outer edge of the disc, ensuring the reading does not exceed the allowable limit. Regardless of the reading, resurfacing the discs is recommended for a smooth finish. Ensure the disc is not machined to a thickness less than the minimum allowable thickness, which is stamped on the disc and can be checked with a micrometer. To remove the disc, take off the two lug nuts or the two disc retaining screws, using an impact screwdriver if necessary. If the disc is stuck, thread two bolts into the holes provided and alternate tightening them until the disc is free, being careful not to damage the threads on the studs. For installation, place the disc over the threaded studs, then install the caliper mounting bracket, brake pads, and caliper over the disc, tightening the bolts to the specified torque. Finally, install the wheel, lower the vehicle, and depress the brake pedal a few times to bring the brake pads into contact with the disc, checking the operation of the brakes before returning the vehicle to normal service.