Operation CHARM: Car repair manuals for everyone.

Brake Fluid: Testing and Inspection

Indications of fluid contamination:
Swollen or deteriorated rubber parts.
- Swollen rubber parts indicate the presence of petroleum in the brake fluid.

To test for contamination:
Put small amount of drained brake fluid in clear glass jar.
- If fluid separates into layers, there is mineral oil contamination.

If contaminated:
Drain and thoroughly flush system, and replace all rubber parts.