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 TM 55-1905-219-14-10
5-20. CYLINDER BLOCK-MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
CLEANING (Cont)
(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.
WARNING
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 inch-16 plugs to
150-180 lb-ft (203.4-244.0 N ) torque and the
m
2 inch-16 plugs to 230-270 lb-ft (311.8-
366.1 N ) torque.
m
CAUTION
Excessive torque applied to the core hole plugs may result in cracks in the water
jacket.
5-361
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