DRAFT
TM 5-4210-249-13&P-2
0196
VALVE CLEARANCE ADJUSTMENT
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TFFT01268
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WARNING
ICON 13
Engine components become hot during normal operation. Allow engine to cool
completely prior to performing this task. Failure to comply could result in serious
injury to personnel.
NOTE
Adjust valve clearance with engine cold or allow engine to cool for at least one half hour to
lower engine oil temperature to 176F (80C) or less.
Increase valve clearance by 0.0039 in. (0.1 mm) at every cylinder head gasket renewal.
Adjust standard valve clearance after engine completes 100 hours of operation.
Valve overlap occurs when exhaust valve is about to close and intake valve is about to
open. Pushrods cannot be turned in this position.
1.
Remove screw (1) and timing gear cover (2) from engine, and attach turning gear tool (3) to timing gear (4).
0196-2