Quote:

Oh, and I just remembered, the real problem was a very small leak from the master cyl. onto the rod causing it to rust and ruin the booster seal.



The mc was replaced the same time as the booster because it was dead. old booster was nasty in that area also which was why I decided to change it out, probably in hindsight there was nothing wrong with it that a wire brush and rattle can couldnt have fixed.


Check valve only has a single port for the vac hose and all of that is in good condition. Leaning towards the diaphram having a small hole in it. I never drove the van before changing/rebuilding the brake system (why it originally sat parked for 3 years) but even after the rebuild/restoration of the brake system I have never felt the brake system has the proper amount of stopping power that it should.