If engine oil gets into the brake fluid, which of the following will happen? A. Rubber seals will swell. B. Everything should operate normally. C. Rubber seals will shrink. D. Brakes won’t hold.
Engine oil reacts with rubber, changing its properties and causing it to expand. This will compromise rubber seals in the brake system and lead to a failure.
When engine oil is added oil to the master cylinder. All of the seals will be swelled and there will be no brakes at all, after a while. Therefore, the master cylinder, all hyd. cylinders and abs modulator, will have to be replaced.
As the seals swell they bind in the different components and thus the pedal may be lost completely.
