General Description Of Oil Flow; Lubrication For The Power Components - Dodge D250 1990 Service Manual

Engine Lubricating System Base Engine Components
Page 9B-4 DODGE Turbo Diesel
Lubrication for the Power Components
General Description of Oil Flow
The main bearings and the valve train are lubricated by pressurized oil directly from the main oil rifle. The other
power components, connecting rods, pistons, and camshaft receive pressurized oil indirectly from the main oil rifle.
The drillings in the crankshaft supply oil to the connecting rod bearings. The oil is supplied to the camshaft journals
through drillings in the main bearing saddle. Smaller drillings in the main bearing saddle supply oil to the piston
cooling nozzles. The spray from the nozzles also provides lubrication for the piston pins.
The number one main bearing saddle does not contain a piston cooling nozzle. Cylinder Number One receives the
lubricating and cooling spray from the nozzle located in the Number Two Bearing Saddle. Cylinder Number
Two receives the spray from the Number Three Bearing Saddle, etc.