Engine Oiling System: Notes

Oil is circulated through engine by pressure provided by a trochoid type oil pump. Pump is mounted on bottom of crankcase and driven by camshaft via an oil pump drive gear. Oil is drawn from oil pan and circulated through a full flow oil filter to main oil passage. Oil is then distributed to camshaft journals and crankshaft main bearing journals. Oil flows from main bearing journals to connecting rod journals. Cylinders, piston pins and piston pin bushings in connecting rod are lubricated by oil squirting from hole in connecting rod. Oil is supplied to camshaft sprocket and timing chain tensioner by main oil passage. Oil flows from main oil passage to rocker arm shafts. This supplies oil to rocker arms. Excess oil from rocker arms lubricates valves and valve stems. Oil not used flows back to oil pan thru push rod holes.