The best way to tell which is which is to install an oil pressure gauge in place of the sending unit. If pressure is normal replace the OSU if not you're looking at the oil pump/engine bearings/clogged oil return galleries.
Maybe a good engine flush with the good stuff is just needed and oil pick-up screen clean-up for sludge.
Its knocking you better be concern or its gonna end up as a major repair.
Sunday, November 11th, 2007 AT 6:32 PM