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 TM 55-1905-219-14-10
5-43. 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.
WARNING
Wear eye protective 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 (203.4-244.0Nm) 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.
5-619
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