Brake Fluid Contamination

Indications of fluid contamination are swollen deteriorated rubber parts. Swollen parts indicate the presence of petroleum in the brake fluid. To test for contamination, put a small amount of drained brake fluid in clear container. If fluid separates into layers, there is mineral oil or other fluid contamination of the brake fluid. If brake fluid is contaminated, drain and thoroughly flush system. Replace master cylinder, proportioning valve, caliper seals, wheel cylinder seals, ABS hydraulic unit and all hydraulic fluid hoses.