OEM 2004 Chevrolet Malibu Brake Master Cylinder

2004 Chevrolet Malibu Parts Questions & Experts Answers

• Q: How to service and repair the Brake Master Cylinder on 2004 Chevrolet Malibu?

  A: Secure the Brake Master Cylinder flange in a bench vise so you can access the primary Piston in the rear. Set the master cylinder reservoir cap and diaphragm aside before you attach proper fittings to its ports for hose connections. Bend clear hoses to each fitting connection before placing them into the storage tank. Put delco supreme ii gm p/n 12377967 brake fluid into the reservoir to reach the midpoint through clean hoses attached to fitting ends that stay under fluid surface. Move the primary Piston down about 1 inch with a rounded tool then release it repeatedly to check fluid flow from the ports at 25 mm depth. The force required to lower the primary Piston rises because the Piston moves less distance when bleed air from the primary and secondary chambers. After these steps run until the ports show normal fluid release without air bubbles. Take out transparent hoses from the reservoir space then place back the reservoir cap and diaphragm before you disconnect the hose fittings from port locations all while covering the master cylinder with a dry shop cloth to stop spills. Take the master cylinder off the vise at last.