Buick 18029940 Caliper,Front Brake

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If an overhaul is needed, explore all options before starting the job. New and factory rebuilt calipers are available on an exchange basis, making the job easier. If you decide to rebuild the calipers, ensure rebuild kits are available. To remove the calipers, siphon off two-thirds of the brake fluid and remove the front wheels. Bottom the piston in the caliper bore and disconnect the brake hose inlet fitting. Remove the mounting bolts and detach the caliper from the vehicle. To overhaul the calipers, remove the brake pads and clean the exterior of the caliper. Use compressed air to remove the piston from the bore and carefully pry out the dust boot. Remove the piston seal and the sleeves and bushings from the caliper ears. Clean all parts and inspect the piston and caliper bore for damage. Lubricate the piston bore and seal, then install a new boot in the piston groove. Insert the piston into the caliper bore and position the dust boot. Install the bleeder valve and new bushings in the mounting bolt holes. Place the caliper over the rotor and mounting bracket, tighten the bolts, and check the clearance. Install the brake hose-to-caliper bolt with new copper washers and bleed the brakes. Finally, install the wheels and depress the brake pedal to bring the pads into contact with the rotor.