Bore End Seal Leak Test

INSPECTION
^ Inspect end of master cylinder bore for signs of excessive leaking. Some fluid is normal due to the wiping action of the seal.
^ Inspect inside booster for presence of brake fluid. A plastic tie strap can be inserted through push-rod opening or through booster check valve opening and into bottom of booster and checked for fluid.
^ If excessive fluid is found, master cylinder will need to be removed and overhauled. Refer to Master cylinder - Service and Repair.
^ Booster should be replaced if booster is contaminated with brake fluid. Refer to Brake Booster. Vacuum Brake Booster