The oil pump is of a trochoid type, and rotates with the crankshaft. Oil is drawn up through the oil pump strainer and passes through the pump to the oil filter. The filtered oil flows into two oil passages in the cylinder block.
From one passage, oil reaches the crankshaft main bearings. Oil from the crankshaft main bearings is supplied to the connecting rod bearings by means of intersecting passages drilled in the crankshaft, and then injected from the big end of the connecting rod to lubricate the piston, rings and cylinder wall.
From the other passage, oil goes up to the cylinder head and lubricates valves and camshafts after passing through the internal oil way of the camshafts.
An oil relief valve is provided on the oil pump which relieves oil pressure when the specified pressure is exceeded.
