Oil from the oil pan is pulled through the suction
bell for the oil pump (10) by oil pump (8). The oil is sent
by the pump to an oil passage in the front cover for the
engine (3). Oil from this passage goes to the cylinder
block and on to base for the oil cooler (5). The base for
the oil cooler is on the left side of the engine, near the
front of the engine. Bypass salve (I ), in the base for the
oil cooler, will let the oil go around the oil cooler (7) when
the oil is cold or if the restriction in the oil cooler is more
than the other parts of the system. A difference in
pressure of 12 to 15 psi (85 to 105 kPa) between the oil
inlet and the oil outlet will open the bypass valve.
Oil from the oil cooler goes to the oil filters.
Bypass valve (12), in the base for the oil cooler will let oil
go around oil filters (13) if there is a restriction in the oil
There are two pressure outlets in the base for
the oil cooler. The pressure outlets are on the outlet side
of the oil cooler and oil filters. The pressure outlets are
for the sending unit and switch for the oil pressure.
Oil from the oil filters (13) goes through a
passage in the cylinder block to oil manifold (4). The oil
manifold is in the center of the cylinder block, above the
camshaft, and goes the full length of the cylinder block.
Oil goes from the oil manifold to the bearings for the
camshaft. There are grooves in the bores in the cylinder
block around the bearings for the camshaft. The bearing
surfaces (journals) on the camshaft get lubrication from
these grooves through a hole in the bearings for the
Some of the oil goes around the grooves and down
through a passage to a hole and groove in the top half of
the main bearing. Oil from the hole and groove gives
lubrication to the bearing surfaces (journals) of the
crankshaft for the main bearings.
Oil gets into the crankshaft through holes in the
bearing surfaces (journals) for the main bearings.
Passages connect the bearing surface (journal) for the
main bearing with the bearing surface (journal) for the
connecting rod. The piston pins get lubrication from oil
thrown by other parts.
Oil for the rocker arms comes from the oil mani-
fold (4) through passages in the cylinder block. The
passages in the cylinder block are in alignment with a
passage in each cylinder head. The passage to the
cylinder head on the left side is near the front of the
cylinder block. The passage to the cylinder head on the
right side is near the rear of the cylinder block.
The passage in each cylinder head sends the oil
into an oil hole in the bottom of the mounting surface of
the bracket that holds the shaft for the rocker arms. The
oil hole is in the front bracket on the left side and in the
rear bracket on the right side. The oil then goes up
through the bracket and into the center of the shaft for
the rocker arms. Oil goes along the center of the shaft to
the bearings for the rocker arms. From the rocker arms,
the oil is pushed through small holes to give lubrication to
the valves, push rods, cam followers, and cam - shaft
After the lubrication oil has done its work, it will
return to the oil pan for the engine.