My 2hp air compressor has been acting up. I turn the thing on, and it slowly pumps up to 50psi, then continues running, but without developing anymore air pressure. It should go to about 130. I tightened up all the bolts, thinking maybe some had rattled loose, but the same thing. Now Ive taken the head off and dismantled it. Ive found some deposits of a rubbery sort of 'gunk', smaller than a pea, but theyre on the surface that contacts the reeds. I scraped the crap off, hoping that after I make a new gasket and put the thing back together, it'll be fixed. Anyone have any ideas?? Ill post pics later.