Before doing the overhaul because of leakage inquire into all possibilities. Cynergistic with the braking systems, new and factory rebuild calipers are available on an exchange bases. If ever rebuilding calipers make sure that a rebuild kit is present before hand and always do it in pairs. Starting with the removal of the wheels where you should start loosening the lug nuts of the wheels then use the jack to lift the car on the jack stands safely. Rear calipers require you to release the parking break cable which can be done by unclipping the cotter pin found at the clevis pin. Remove the
Brake Line from the caliper and cover it in order to avoid any substances from coming into contact with the line. This is done as part of the brake pad replacement process As you do this, there is need to remove the caliper. Alight the caliper on a clean bench top making a note of the pad retainer if fitted before the removal of a retainer. Remove the dust boot retaining ring threaded into the drive shaft if fitted, and gently lever out the dust boot. To remove the piston just put a wooden block between the piston and the caliper and then blow air to have the piston released. Check for any scoring or rust on the mating surfaces; if such are apparent, then replace the caliper. Piston seal If the components are in good and healthy condition then, remove the seal with wooden or plastic implement so that seal will not get damaged. Extend out the emerged movement bolt sleeves and clean all structures with the brake system cleaner. Reassembly should be done using the right rebuild kit; the new piston seal should be soaked in the brake fluid before fitting in the caliper bore. Coat the piston with the compatible lubricant and, with utmost precision, pass it through the new boot and make sure that it sits as it should. If used, ready the retaining ring for the piston dust boot. Using silicone based grease lubricate the sliding bushing and sleeves and then put on the dust caps. The removal of the rear caliper may also necessitate use of specific tools hence it is advisable to seek the services of a mechanic if you don't have the right tools. To fit the caliper, just follow the above removal process in the conversant manner ensure the sealing washer fits on the brake line fitting. Last but not the least, perform the brake bleeder, put back the wheels, loosely put the nuts over the lugs, remove the car stands, lower the car and finally and again tighten the nuts to the desired torque.