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 TM 55-1905-221-14-4
6-29. CYLINDER BLOCK - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION/ITEM
ACTION
REMARKS
PRESSURE TEST (Cont)
(4) At the end of the test
period, examine the
cylinder bores, air box,
oil passages, crankcase
and exterior of the
block for presence of the
water and antifreeze
mixture which will
indicate the presence of
cracks. A cracked
cylinder block must be
replaced by a new block.
(5) After the test is com-
pleted, remove the
plates, drain the water
jacket and blow out
all of the passages in
the block with compressed
air.
INSPECT
7.
a. After cleaning and pressure
testing, inspect the cylinder
block.
b. Since most of the engine cool-
ing is accomplished by heat
transfer through the cylinder
liners to the water jacket,
a good liner-to-block contact
must exist when the engine
is operating. Whenever the
cylinder liners are removed
from an engine, the block
bores must be inspected.
NOTE
Before attempting to check the block bores, hone them throughout their entire
length until about 75% of the area above the ports has been "cleaned-up".
6-525
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