Engine Lubrication

3.0L Lubrication System

The engine lubrication system is of the force-feed type in which oil is supplied under full pressure to the crankshaft main bearings and crankshaft thrust main bearing, and connecting rod bearings, valve tappets and camshaft bearings. From the valve tappets, a controlled volume of oil is supplied to the rocker arms through the hollow push rods. All other moving parts are lubricated by gravity flow or splash. The rotary spur-type pump, which develops the oil pressure, is bolted to the No.4 main bearing cap. The spur-driven gear is rotated by the distributor shaft through an oil pump intermediate shaft. A full-flow oil filter is externally mounted on the cylinder block and normally all engine oil passes through the filter. However, if the element should become restricted, a spring-loaded bypass valve will open and allow an uninterrupted flow of oil to the engine's moving parts.