[kurty85]

Got the brake system bled today with a power bleeder at 15 psi from the reservoir. I went back to a booster and the stock master cylinder with my lines (no abs). A lot of air came out and the pedal was hard for the first time. No leaks from any fittings. I checked the pedal about 15 minutes later and it had some firmness but was able to be pushed very far down. I was hearing a squealing noise that sounded like the last time I tried to bleed. I think it is from the master cylinder seals. Last time I was observing the master cylinder while my son pushed on the pedal and I saw fluid running down the front of the booster. I took the master cylinder apart and cleaned it and could see no deformation to the seals with a flashlight. Does anyone think that the master cylinder is letting air in or have observed this before? I bought another stock master cylinder to replace it with and will try and rebleed when it gets here. This is maddening as I have replaced every component in the system except the master cylinder. The picture is how I am set up right now.