OEM 2001 Buick Park Avenue Brake Master Cylinder

2001 Buick Park Avenue Brake Master Cylinder Parts and Q&A

• Q: How to service and repair the Brake Master Cylinder on 2001 Buick Park Avenue?

  A: Place the Brake Master Cylinder mounting flange into the bench vise to fix it but allow access to the end of the main Piston when you need to repair the Brake Master Cylinder. Put suitable fittings with flare connection on both master cylinder ports to create hose connections. Also remove the existing parts from the reservoir and install them now. Route the clear hoses to the master cylinder through its fitting points. Place delco supreme 11 (R)(GM Part 12377967) or equivalent dot-3 brake fluid in the reservoir until it reaches at least halfway and make sure both ends of the hoses are immersed in fluid. Depress the primary Piston with a round-ended tool to bleed air from the system while monitoring fluid flow from the ports; as air leaves the pistons the effort needed will increase and Piston stroke decreases. Keep operating the tool to move the primary Piston until fluid exits without air bubble presence. Rewash the transparent hoses from the reservoir and reattach the master cylinder reservoir cap along with the diaphragm before taking off the fluid ports fittings. Keep the cylinder dry during all steps by covering it with a clean cloth as you remove it from the vise.