I hope this isnt too newbie, but I bought a MC from JCWhitney and installed it. I saw that there is a tiny hole in the MC Cap, where the nut connects to the washer thing. I looked at the old one and it had the hole too, but that one also got water in the system and rusted out everything. Is there supposed to be a hole? When I took it out driving the first time since the new MC, brake fluid was leaking out of the hole... I dont want to ruin a whole new brake system...Is it supposed to do that?