Oil Pump: Description and Operation

The rotary spur-type oil pump, which develops the oil pressure, is bolted to the No. 4 crankshaft main bearing cap.
- The spur-driven gear is rotated by the camshaft position sensor housing shaft through an oil pump intermediate shaft.
- A full-flow oil bypass filter is externally mounted on the cylinder block and normally all engine oil passes through the oil bypass filter.
- However, if the oil filter element should become restricted, a spring-loaded bypass valve will open and allow an uninterrupted flow of oil to the engine's moving parts.
- Flexible fuel vehicles are equipped with a unique oil pump with a stainless steel oil pick-up screen.