To upgrade the Wheel Cylinder, take it out from the vehicle firstly. Next, extract the boots and then remove the
Pistons , seals and the spring. After that, use a bleeder valve to pull, and check the bore of the cylinder and the pistons for gouges, tire and scratchy, and what the cylinder neck and what. If there is corrosion, then the suitable Wheel Cylinder hone should be used to clean up. Albeit, if the cylinder bore does not clear up after a couple of passes, change the Wheel Cylinder . Clean all pieces with denaturing alcohol and dry down with non-lubricated compressed air. Clean the new seals of oil, using clean brake fluids. For assembly, install the bleeder valve, and tighten up to 7 nm (62 inch lbs.), followed by spring, seals , pistons, and boots. Finally, install the Wheel Cylinder.