1978 924 Brake Booster

[rialaigh]

Can't seem to find any good diagrams. Mine leaks and has brake fluid all in it. I have been working on the brakes for 6 months and have replaced EVERYTHING except the booster and the line. The booster was the problem....I am assuming there is some type of rubber seal that seals between the master cylinder and the booster and mine has failed, I need to know if I can replace the seal, or what I need to do for this. Basic problem is the front right and rear left wheels won't bleed (air keeps coming through) and air bubbles up into the brake fluid resivoir (For those wheels) when you release the brake pedal. Also I pulled the vacum lines and they have brake fluid in them, pulled the master cylinder off and its really wet inside the booster....

Any help would be appreciated, I am looking to get the brakes going and sell this sucker, its been fun to work on but Im needing the cash and obv cant sell with no brakes.

[redstrosekNic]

Your booster is going to be toast if there is brake fluid in it...

[Rasta Monsta]

Master is leaking.

[944kyle]

+1 master cylinder is bad, booster should have no fluid in it at all. If your pedal is very hard the booster may be bad also, kinda feels like it does when you press the pedal down with the car off.

[old 924]

+1...bad master

[rialaigh]

so bad master and now bad booster as well? because I replaced the master with a remanufactured one when I started working on the brakes 6 months ago. I guess I will replace the master again, do I need to replace the booster?

[redstrosekNic]

With brake fluid inside, the booster diaphragm with fall apart. You could suck out the fluid with a turkey baster for the short term, but the booster will eventually fail.

Good luck!

[rialaigh]

thanks, I will get on that today . Are there any seals inside the booster that would fail or is this for sure the master cylinder