Re: Olds Pump=More Oil pressure=Leaking Rear Main

Posted by PackardV8 On 2007/8/6 7:25:52

JV. check the rear main bearing cap to see if oil gallery is drilled out to 9/16. Also the verticle rear main feed oil gallery starting at rear main cap to rite oil gallery (about 5 inches long ) is probably 9/16 diameter too. The main bearing feed gallery's are probably drilled out bigger.

What kind of oil seals are used on the valves???