Bore End Seal Leak Test

REMOVAL
1. Press brake pedal several times, to deplete booster vacuum.
2. Remove the windshield wiper motor if necessary.

Fluid Level Sensor Connector:

3. Disconnect the fluid level sensor connector.
4. Remove the nut retaining the wire harness support bracket. Remove the bracket.
5. Remove the nuts retaining brake master cylinder to the power brake booster.

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

INSTALLATION
^ Follow the removal procedure in reverse order.
^ Tighten retaining nuts to 21-29 Nm (16-21 ft. lbs.).
^ Retest brake system.