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 TM 55-1905-220-14-11
5-79. CYLINDER BLOCK - MAINTENANCE INSTRUCTIONS. (Continued).
LOCATION
ITEM
ACTION
REMARKS
CLEANING (Cont)
(e) Rinse the block in clear hot water to remove
the acid solution.
(f) Neutralize the acid that may cling to the
casting by immersing the block in an alkaline
bath.
(g) Wash the block in clean water or steam clean it.
Wear protective eye goggles when using
compressed air.
(4) Dry the cylinder block with compressed air.
(5) Make certain that all water passages, oil
galleries and air box drain openings have
been thoroughly cleaned.
NOTE
The above cleaning procedure may be used on all
ordinary cast iron and steel parts of the engine.
Mention will be made of special cleaning procedures
whenever necessary.
(6) After the block has been cleaned and dried,
coat the threads of the plugs with sealant
and, using new gaskets, reinstall the core
hole plugs. Tighten the 1-3/4 inch - 16
plugs to 150-180 lb-ft (203.4 - 244.0 Nm)
torque and the 2-1/2 inch - 16 plugs to
230-270 lb-ft (311.8 - 366.1 Nm) torque.
CAUTION
Excessive torque applied to the core hole plugs may
result in cracks in the water jacket.
5-1074
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