OEM Chevrolet Venture Brake Master Cylinder

Chevrolet Venture Brake Master Cylinder Parts and Q&A

• Master Cylinder
  18022002
  Q: How to replace the brake master cylinder on Chevrolet Venture?

  A:

  To change the Brake Master Cylinder you must disconnect its sensor electrical connector and brake pipes first. Install rubber caps as fluid plugs to seal each brake pipe end after disconnection to avoid leaks and prevent contamination. Start by replacing the brake pipe plugs then loosening and removing master cylinder mounting nuts. Take the master cylinder out including its fluid drain from the reservoir. Prior to attaching the Brake Booster install the master cylinder on a bench stand and complete the bleed procedure. Afterwards secure the master cylinder mounting nuts with 29 nm (21 ft. Lbs.) torque values. Secure the brake pipes to the master cylinder and fasten the fittings at 32 nm torque setting (24 ft. Lbs.). Close the electrical connection to the Brake Fluid Level Sensor then depress the brake pedal to remove all air from the brake system.
• Master Cylinder
  19209260
  Q: How to overhaul the brake master cylinder on Chevrolet Venture?

  A:

  To overhaul the Brake Master Cylinder, begin by extracting it from the vehicle and fix the mounting flange in a bench vise with the rear of the primary Piston exposed. Clean the exterior of the master cylinder reservoir around the cap before taking the cap and diaphragm off, examining them for cuts, cracks, or nicks or deformation and replacing compromised parts. Next, remove the master cylinder reservoir and use a smooth round-ended tool to push the primary Piston and the Piston retainer and then pull out the Piston assembly from the bore. Connect the cylinder inlet ports and the rear outlet ports, and thereafter, experience low pressure, non-lubricated, filtered air suction at the front outlet ports to disassemble the secondary Piston along with the primary and the secondary seals as well as the return spring and throw away the primary Piston assembly, the Piston retainer, and the seals. For assembly, clean the master cylinder, secondary Piston, and return spring with denatured alcohol, checking for cracks, scoring, pitting, or corrosion, and replace the master cylinder if any problems are detected. Dry all of the parts using non-lubricated, filtered air, and lubricate the master cylinder bore, secondary Piston, return spring, and all the parts undergoing overhaul with the delco supreme ii, gm p/n 12377967 (Canadian P/N 992667), or equivalent dot-3 brake fluid from a source in a sealed container. Put together the lubricated new primary seal and retainer and new secondary seal to the secondary Piston, install lubricated return spring and secondary Piston assembly into the cylinder bore followed by lube new primary Piston assembly . Push the primary Piston into the cylinder with a smooth, round-end tool while installing the new Piston retainer in that, and then reconnect the master cylinder reservoir, its cap and diaphragm before reinstalling the master cylinder into the vehicle.