E N G I N E
S Y S T E M S
O P E R A T I O N
SYSTEM OIL FLOW
LUBRICATION SYSTEM SCHEMATIC (ENGINE WARM)
1. Oil passage (to front idler gear). 2. Oil pe$eage (to turbocharger and fuel injection
pump). 3. Rocker arm shaft. 4. Oil preaaure connection. 5, Oil manifold. 6. Piston cooling
orifices. 7. Camahaft bearing bore. 8. Balancar shalt bearing bores. 9. Oil cooler bypass
valve, 10. Oil filter bypaaa valve. 11. Oil filter. 12. Turbocharger. 13. Oil pump. 14. Oil
pan. 15. Engine oil coolar.
Oil pump (13) pulls oil from oil pan ( 14) and then
pushes the oil to oil cooler (15). From the oil cooler
the oil goes to oil filter (11) and then to oil manifold
(5). From the oil manifold, oil goes to all main bear-
ings, piston cooling orifices, camshaft and balancer
shaft bearings. Oil passages in the crankshaft send
oil to the connecting rod bearings. Oil from the front
main bearing goes through oil passage (1) to the
bearing for the fuel injection pump idler gear.
Oil passage (2) from No. 3 main bearing sends oil
to turbocharger (12) and the fuel injection pump
housing on the right side of the engine.
An oil passage from the rear of the cylinder block
goes below the head bolt hole and connects with a
drilled passage that goes up next to the head bolt
hole. A hollow dowel connects the vertical oil passage
in the cylinder block to the oil passage in the head.
The spacer plate has a hole with a counterbore on
each side that the hollow dowel goes through. An O-
ring is in each counterbore to prevent oil leakage
around the hollow dowel. Oil flows through the hol-
low dowel into a vertical passage in the cylinder head
to the rocker arm shaft bracket. The rocker arm shaft