Engine Lubrication: Description and Operation

LUBRICATION

DESCRIPTION
The lubrication system is a full flow filtration pressure feed type.

OPERATION





Oil from the oil pan is pumped by a gerotor type oil pump directly mounted to the crankshaft nose. Oil pressure is controlled by a relief valve mounted inside the oil pump housing. For lubrication flow refer to (Fig. 80)

The camshaft exhaust valve lobes and rocker arms are lubricated through a small hole in the rocker arm; oil flows through the lash adjuster then through the rocker arm and onto the camshaft lobe. Due to the orientation of the rocker arm, the camshaft intake lobes are not lubed in the same manner as the exhaust lobes. The intake lobes are lubed through internal passages in the camshaft. Oil flows through a bore in the No. 3 camshaft bearing bore, and as the camshaft turns, a hole in the camshaft aligns with the hole in the camshaft bore allowing engine oil to enter the camshaft tube. The oil then exits through 1.6mm (0.063 inch) holes drilled into the intake lobes, lubricating the lobes and the rocker arms.





ENGINE LUBRICATION FLOW CHART - BLOCK: TABLE 1





ENGINE LUBRICATION FLOW CHART - CYLINDER HEADS: TABLE 2