1.1
DETROIT DIESEL 53
CYLINDER BLOCK
serves as the main
permit inspection of the pistons and compression rings
The cylinder block (Fig 1)
structural part of the engine. Transverse webs provide
through the air inlet ports in the cylinder liners.
rigidity and strength and ensure alignment of the
block bores and bearings under load. Cylinder blocks
The camshaft and balance shaft bores are located on
for the two, three and four cylinder In-Line engines
opposite sides near the top of the In-Line engine
are identical in design and dimensions except for
block.
length.
The block is bored to receive replaceable wet-type
cylinder liners. On the In-Line and 6V cast iron
The upper halves of the main bearing supports are
cylinder blocks, a water jacket surrounds the upper
cast integral with the block. The main bearing bores
half of each cylinder liner.
are line-bored with the bearing caps in place to ensure
longitudinal alignment. Drilled passages in the block
The
carry the lubricating oil to all moving parts of the
water jacket and air box are sealed off by a seal ring
engine, eliminating the need for external piping.
compressed between the liner and a groove in the
block (Fig. 3).
The top surface of the In-Line block
is grooved IO accommodate a
An air box surrounding the lower half of the cylinder
block-to-head oil seal ring. Also, each water or oil hole
liners conducts the air from the blower to the air inlet
is counterbored to provide for individual seal rings
ports in the cylinder liners. An opening in the side of
(Fig. 6).
the block opposite the blower on the In-Line engines
and air box openings in both sides of the block on the
V-type engines provide access to the air box and
Fig. 1 - Cylinder Block (Four Cylinder Block Shown)
SEC. 1.1 Page 1
March, 1973
