DETROIT DIESEL 53
The upper halves of the main bearing supports are cast
The cylinder block (Figs. 1
is a one-piece casting
integral with the block. The main bearing bores are line-
which forms the main structural part of the engine.
bored with the bearing caps in place to ensure
Transverse webs provide rigidity and strength and
longitudinal alignment. Drilled passages in the block
ensure alignment of the block bores and bearings under
carry the lubricating oil to all moving parts of the engine
and thus eliminate external piping.
The block is bored to receive replaceable wet-type
in both sides of the block on the V-type engines, permit
cylinder liners. On the
access to the air box and inspection of the pistons and
cylinder blocks, a water jacket surrounds the upper
rings through the air inlet ports.
half of each cylinder liner.
The top surface
of the V-block is grooved to accommodate a
water jacket and air box are sealed off by a seal ring
block-to-head seal ring. Also, each water or oil hole is
compressed between the liner and a groove in the block
counterbored to provide for individual seal rings (Fig.
30). In addition, the V-type engine block is grooved
around the air inlet opening, between the cylinder banks,
to accommodate a blower-to-block seal ring.
On the V-type engine, the camshaft bores are
Each cylinder liner is retained in the block by a flange at
located on the inner side of each cylinder bank, near the
its upper end, which seats in the counterbore in the
top of the block.
1972 General Motors Corp.
SEC. 1.1 Page 1