motor oil in brake booster
 

Well I finaly found a truck thats worth working on, when I popped the lid off the brake booster it was full of oil. Could this hurt any of my brake parts? NO WONDER MY BRAKES DIDN'T WORK. :rolleyes:

Pat :fb:

I am going to take a WILD GUESS and say someone connected the vacuum brake hose into the valve cover. It should be connected to a vacuum source like the rear of the intake manifold or the bottom of the carburetor. Just an uneducated wild guess.

brake fluid probabally//new master and booster

Is the oil in your master cylinder reservoir, or is it inside the vacuum booster itself?

brake fluid is polyglycol based petroleum will make all the seals in the system swell....new master cylinder calipers wheel cylinders anything with rubber seals....and you will need to completely flush the lines with brake clean and compressed air....

bump...and the answer is...

oil in brakes
 

You said when you popped the lid off your brake booster- Did you mean the master cylinder cause the booster don't have a lid that I know of. I'd purge the MC and the rest of the system and replace with brake fluid and bleed the system and see if you have brakes. If you have ruined any seals then you may have to replace the parts as Cdowns stated. Are you positive it's engine oil because brake fluid gets dark in the MC when it gets old but it still smells like brake fluid. You may just have a bad MC.

Re: motor oil in brake booster
 

stupid me the oil was in the master cylinder reservoir :rolleyes
pat

Re: motor oil in brake booster
 

I have the same problem, but it is the rear seal in the back of the master cyl that is leaking. Some fluid looks like it went into the vacuum booster. We'll see what happens after I change the MC.