put new oil pump and screen in 1975 chevy c-10 and oil pressure still drops now motor knocking just a little . when I put new pump on at first it sounded though it would stop but once it warmed up it starte knocking again. took valve cover off on right -side it seems to be oiling but could not tell if was clogged or return hole clogged. can you help me ?
Nov 5, 2007 at 3:02 PM