- Buick Ownership
I have a situation. A week ago my car was making noise, like lifters or rocker arms. It would last ten minutes then go away. The oil pressure on the dash read 55 lbs. I had the engine flushed , and the motor quieted way down , it sounds good. Then I was driving it and the reading on the dash gauge started fluctuating and went down to zero, the oil light came on, but the engine still sounds good . The mechanic last week tested the oil pressure and said it was ok. Sometimes the dash gauge reads in the seventies and seems stable. My question is, would a bad oil pump have readings like that or is it most likely a bad sending unit? It seems to run good, if the pressure was zero , wouldn't it be noisy? Does the oil pump on these cars go often? My gas gauge doesn't work, and neither does my speedometer, tach works sometimes. Thanks!