Originally Posted by bboogieart
[quote=dusterguy]Mine is the huge cast iron unit. The master cylinder will run itself dry no matter where I keep the fluid level at. No leaks in the rest of the system.


Are you actually losing fluid with no visible leaks?
If it's running itself dry, it is going some where.
It might be going into the booster from the back of the cylinder.

Not good.

Might want to take a peak. [/quote

I had one doing that and it was leaking out the back down inside the firewall,like was said it's going somewhere.