OEM 2001 Cadillac Eldorado Brake Master Cylinder

2001 Cadillac Eldorado Brake Master Cylinder Parts and Q&A

• Q: How to overhaul the brake master cylinder on 2001 Cadillac Eldorado?

  A: In order to overhaul the Brake Master Cylinder, first, unbolt it from the vehicle and clamp the mounting flange to a bench vise, with the rear of the primary Piston exposed. Clean outside of master cylinder reservoir near cap before removing the element cap and diaphragm, check them for cuts, cracks, nicks, or deformation and renew defective parts. Then remove the master cylinder reservoir, and then, using a smooth, round-ended tool, pump the primary Piston and remove the Piston retainer and then the primary Piston assembly from the cylinder bore. Plug the cylinder inlet ports and rear outlet port, using low pressure, non-lubricated and filtered air to the front outlet port in order to take out the secondary Piston with primary and secondary seals and the return spring. Remove the first Piston assembly, Piston retainer, and seals from the secondary Piston. Clean the internal and external surfaces of the master cylinder, secondary Piston, and return spring with denatured alcohol while inspecting for cracks, scoring, pitting, or corrosion, and replace the master cylinder if found. Dry all elements using non-lubricated, filtered air, lubricate the master cylinder bore, secondary Piston, return spring, and every overhaul element with delco supreme 11(R) (GM P/N 12377967), or comparable dot three brake fluid from an unamended, closed rank. Mound the lubricated new primary seal and retainer, with the new secondary seal on the secondary Piston, install the lubricated return spring and secondary Piston assembly to the cylinder bore, and introduce the lubricated new primary Piston assembly . Depress the primary Piston gently with a smooth round-ended tool to install new Piston retainer, master cylinder reservoir can be connected to master cylinder and reservoir cap and diaphragm attached. Last but not least, reinstall the master cylinder on the vehicle.