I need a part number or a better way to describe it. For a gasket that goes between the B/B and B/M.C. Dumb people at advance auto don't understand what it is. I was also wondering if inface there is one. I would think there is, b/c its pushing like 1010lbs of pressure. Or can I just jb weld the spot for a temp fix? I don't really want to JB it. but I will if i have to, i have a spare mc and bb. Anyway thanks in advance.

 

I don't believe there is a gasket. Never have seen one for sale anywhere, and I actually just replaced the master cylinder on my car and there wasn't a gasket. Why do you think there should be one? There is no actual air or fluid pressure at that point.

Actually, I don't think I've seen one on any car I've worked on before.

 

Same here. No gasket on the '79 or the '83 that I pulled m/c from.

 

Its just a peice of paper. No need for it.

-nick-

 

well when i press the brake pedal down, air leaks out where they meet.

 

When I replaced my brake master cylinder and my brake booster, I didn't have a gasket in there. I don't see why you would need one.

 

well then what is the air leak coming from....is it normal? I can't find anything on it.

 

check your booster, I had to replace both on my 88, the M/C leaked and took it out also. It was leaking when I bought it and had been that way for a while.

I did not need a gasket either, there is a seal for the plunger that gets oil on it when the M/C fails

 

Usually if there is an air leak its because the booster is bad. Having a gasket in there will only delay a bigger problem.

 

Having a gasket just makes a 110% seal instead of a 100% seal.

You will want a new brake booster, dont put that off. It helps out the engine alot by taking out the vacuum leak. Believe me, the bolts have enough torque to hold it to the metal.

 

ok thanks guys