Engine Lubrication System

Pressurized oil from the oil pump is directed through a drilled oil passage to the full-flow oil filter and from the oil filter to main oil galleries intersecting the valve tappet guide bores. A drilled gallery (crossover) at the rear of the tappet chamber routes oil to the left bank. The crankshaft main bearings, connecting rod bearings, and camshaft bearings are supplied with oil from the right oil gallery.

Oil flow to the camshaft sprocket and timing chain/belt is through an annulus and drilled passage at the front of the No. 1 camshaft bearing. Oil flow to the rocker arms is through the valve tappets and up the push rods to the arms.

All 7.5L engines are equipped with an engine oil cooler. The engine oil cooler is block-mounted. The compact oil-to-water heat exchanger mounts directly to the left side of the engine, at the oil filter mounting pad.

Oil Pump

The heart of the lubrication system is a full-pressure cast-iron pump. The high capacity gerotor pump is bolted to the bottom of the cylinder block and is driven by a hex shaft from the distributor. The pressure is relief-valve controlled. The oil pump draws oil from the oil pan through an attached oil pump screen cover and tube to provide the necessary volume of oil for engine lubrication.

Oil Pan

The oil pan is a stamped steel part that bolts to the bottom of the cylinder block. The oil pan is a reservoir for engine oil used by the oil pump to lubricate internal engine components.

Item	Part Number	Description
1	9278	Oil Pressure Sensor
2	—	From Engine to Oil Bypass Filter to Oil Cooler
3	—	From Oil Cooler Back to Engine
4	—	From Oil Cooler
5	—	To Oil Bypass Filter