I replaced my master cylinder with a rebuilt one. Found out that it was from a 71/72 Impala or Caprice.
The car has power brakes with front disks. Old one was leaking. Now the new one leaks. Not only did it leak but it actually sprayed the inside of my hood. Not so bad that I couldn't touch it up. But bad enough.
I thought at first it was a line, so I had a buddy pump brakes - nothing spewing anywhere. I looked at the spray pattern and it looked like it was coming from the back of the master cylinder. The cover I got with the cylinder is a little rough looking. The little slit where the gasket pokes thru to keep it in place was the only place I figured the leak would be coming from.
I thought I may have put too much fluid in, so I reduced the fluid and JBWelded over the slit. Wrapped the cylinder with a paper towel and went for a ride. Nothing when I was on flat roads. Went up hills. No spraying, but still has a big leak. Down over my freshly painted booster.
Went back to parts dealer that sold me master cylinder. They called distributor - none left and don't intend making them either. I looked for weeks to find the cylinder and I'm stuck again! They may be able to get my old one back but don't know if they can.
I have included a picture of the cover. I put a little brake fluid on top of cylider rim to show where it is positioned on gasket. It looks good, but when I yank the cover off, the whole top rim of cylinder (where it meets cover) is soaked with fluid.
Here is the picture where I patched it.
I did notice that the bail is pretty easy to pull off and on from the cover. My other ones I needed a screw driver to pry bail off. Could it be too loose? Where the heck will I find another cover? When I put the cover on a flat surface, it looks level. Anyone have any ideas on what I can do? Can I bend bail to tighten it up?