OEM 2006 Buick LaCrosse Brake Master Cylinder

2006 Buick LaCrosse Brake Master Cylinder Parts Questions & Experts Answers

• Q: How to overhaul the brake master cylinder on 2006 Buick LaCrosse?

  A: Install the Brake Master Cylinder in a vise on a workbench to provide good access to the back of the primary Piston during repairs. First clean the area around the master cylinder reservoir cap and take out the cap with diaphragm when you are ready to inspect them for damage and replace any faulty parts. After disconnecting the reservoir you can push the primary Piston down with a rounded tool. This removes the Piston retainer part and the primary Piston unit from the cylinder structure. Connect all cylinder ports then insert filtered low air pressure into the front outlet port to push out the secondary Piston, primary sets, secondary sets and return spring for disposal. Keep the primary Piston parts for replacement. Wipe down the inside and outside of the master cylinder and secondary Piston components using denatured alcohol before inspecting for damage or corrosion on the return spring when needed. Replace the master cylinder if you cannot fix the found problems. Put components through non-lubricated filtered air and soak all overhaul components in delco supreme 11® brake fluid or equivalent dot-3 from a sealed fluid pack. Insert both lubricated primary seal and retainer components into secondary Piston and fit the lubricated return spring with secondary Piston assembly into cylinder bore. Set new primary Piston assembly on top before positioning it into place. Use a smooth tool to push down on the primary Piston while installing the new Piston retainer. Put the master cylinder reservoir back in place and place its cap and diaphragm. Return the master cylinder to its original position.