SUBSECTION 11B
ENGINE (LESS MAJOR ASSEMBLIES)
GENERAL
The camshaft and balance shaft bores are
located on opposite sides near the top of
This subsection contains repair informa-
the block.
tion on the block items such as cylinder
blocks,
cylinder
head,
valves
The upper halves of the main bearing
crankshaft, flywheel, pistons rods,
support are cast integral with the block.
rings, camshaft, etc..
The main bearing bores are line-bored
with the bearing caps in place to ensure
longitudinal alignment. Drilled passages
CYLINDER BLOCK
in the block carry the lubricating oil to
all moving parts of the engine, eliminat-
ing the need for external piping.
Description
The cylinder block (Figure 11B-1 and
Figure 11B-2 on page 11B-2) serves as
the main structural part of engine.
Transverse members, cast integrally,
provide rigidity and strength and ensure
alignment of the block bores and bear-
ings under load. The two ends of the
block are similar, so the flywheel hous-
ing and gear train can be assembled to
either end.
The block is bored to receive replaceable
cylinder liners, Water jackets, which
extend the full length of the bores, are
divided into upper and lower sections
which are connected by hollow struts
(see Figure 11B-2 on page 11B-2). Coo-
lant from the pump enters at the bottom
through holes which register with corre-
sponding openings in the cylinder head.
An air box (Figure 11B-2 on page 11B-2)
surrounding the water jackets conduct
the air from the blower to the air inlet
ports in the cylinder liners. Air box
openings (Figure 11B-3 on page 11B-3)
on the side of the block opposite to the
blower provide access to the air box and
Figure 11B-1. Cylinder Block
permit inspection of the pistons and com-
pression
rings
through
the
air
inlet
ports in the cylinder walls.
The perimeter of the top surface of the
cylinder block is grooved, outside of the
cam
pockets,
to
accommodate
a
Subsection 11B 11B-1
