Engine Lubrication: Description and Operation

1. General

The lubrication system is a full-flow, filtering type. The oil pump utilizes a thin, large-diameter trochoid design to accommodate the high engine output. It is directly driven by the crankshaft. Engine oil flow is regulated by the relief valve built into the oil pump. It is then delivered to the journal bearings, connecting rod bearings, etc., via the oil passage (on the lower right side of the cylinder block), oil filter, and the oil gallery (on the right of the cylinder block) to provide proper lubrication.

Engine oil is also fed under pressure to the cylinder head valve mechanism after the flow is regulated by the orifice provided in the oil gallery. The rocker shaft has a built-in relief valve on the end so proper oil pressure is delivered to the hydraulic lash adjusters. The oil pan is provided with baffle plates to eliminate the effect of oil suction caused by oil level variations during operation.