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 TM 3-1040-279-12&P
3-4 REPAIRING ENGINE HEAD.
a. Disassembly.
1.
Remove machine bolt (1), lockwasher (2), backstop washer (3), engine valve backstop (4) and
engine valve (5) from engine head (6).
b. Inspect/Repair.
1.
Inspect machine bolt (1) for stripped threads and backstop washer (3) for corrosion. Replace
damaged parts.
2.
Inspect engine valve backstop (4) for burred or worn index tabs (7) and for corrosion. Remove
corrosion with rag and fog oil. If badly damaged, replace with spare and turn in to organizational
maintenance.
3.
Inspect engine valve (5) for broken, bent or burnt petals. Replace if petals are broken or bent.
Change 4
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