Engine Oiling System

Oil pump is a gear-type pump, driven by camshaft gear through hexagonal drive shaft. Oil enters pump through screened inlet in oil pan, passes through oil filter to oil cooler in the radiator. It then returns to the oil filter base.

Oil is delivered to right gallery where it is distributed to the 5 main bearings. The right bank valve lifters receive oil from this gallery through 8 feed holes that intersect gallery. Camshaft bearings are lubricated from vertical passages intersecting main bearing oil passages. Front main bearing connects right gallery to left gallery, which then feeds left bank of valve lifters.

The injection pump driven gear gets oil from passages in front camshaft bearing. Rear driven gear bearing receives oil from passage in shaft of driven gear and vacuum pump is oiled by orifice in rear oil gallery plug. An orifice in front of right gallery lubricates the timing chain and fuel pump eccentric.

Rocker arms and valve tips are lubricated through lifters and hollow push rods. Vacuum pump drive gear is lubricated through left rear gallery and connecting rod bearings receive oil from drilled passages in crankshaft. Grooves around each main bearing furnish oil to drilled crankshaft passages. Oil returns to oil pan reservoir through 2 passages in cylinder head.