TIP: Always use jackstands when using a jack to raise a vehicle!!! I have known of too many guys that have been killed for not following this simple rule.
To rebuild calipers you will need to remove them from the vehicle. With the tire off remove the two caliper bolts and the banjo bolt holding the brake hose to the caliper.*Photo 1
With the caliper unbolted, place a block of wood inside the caliper as pictured in *Photo 2.
Apply air pressure to the caliper through the banjo bolt hole, be aware this is going to cause the piston to pop out. *Photo 3
Inspect the piston and caliper for excessive pitting, grooves or scarring. If any of these are present, I would recommend replacing either the piston or the caliper. If none of these are
present, remove the rubber seals from the caliper and piston and clean thoroughly,
I recommend a strong solvent or degreaser(I use carb cleaner), being sure not to get any on the rubber seals. If some varnish still remains, use 400-600 grit sand paper until you achieve a smooth surface. *Photos 4-7Inspect seals, replace as needed (usually called a caliper kit), install the oring and outer boot in the caliper. Lube the piston with brake fluid, then carefully slide the piston into the caliper without unseating the boot or oring(the most difficult part of the whole project).
TIP: check pads and rotors before reinstalling the caliper to prevent further issues, if your rotor looks like mine, get it turned or replace it.
Reinstall the caliper. Be sure to bleed the brakes (for process, search my blog for "bleeding brakes") before putting the wheel back on, then pump up the brakes to ensure the caliper is working properly.
Remount the wheel and test drive.
TIP: Always pump the brake pedal before driving a car that has had brake work done to avoid severe damage to the vehicle, persons, and other property!!! And always test drive a vehicle after doing brake work before assuming the job is finished.
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