Clutch Fluid: Testing and Inspection

CLUTCH HYDRAULIC FLUID CONTAMINATION TEST
If a vehicle is inspected to have contaminated fluid, check for swollen or deteriorated rubber parts.
Swollen rubber parts indicate the presents of petroleum in the clutch fluid
To test for contamination, put a small amount of drained clutch fluid in a clear glass jar. If the fluid separates into layers, there is mineral oil contamination.
If contaminated, the entire hydraulic clutch system must be replaced. Do not attempt to recondition any of the hydraulic clutch components.