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TM 9-2815-226-34-1
d. Valve seat insert security and seat width check:
(1) Tap lightly on cylinder head near seat insert.
(2) If seat loose enough to bounce, mark it for replacement.
(3) If slight looseness found, seat insert is serviceable.
1. MINIMUM SEAT WIDTH 0.063 INCH (1.600mm)
2. MAXIMUM SEAT WIDTH 0.125 INCH (3.175mm)
TA295325
(4) Check insert seat area width. If width exceeds 0.125 in. (3.175 mm) at any point and cannot be narrowed
sufficiently during regrind, mark for replacement.
e. Injector sleeves inspection.
NOTE
Injector sleeves marked for replacement due to failure of air pressure test are not
checked further.
NOTE:
SEATING AREA
IS APPROXIMATELY
1/16 IN. (1.58mm)
WIDE.
(1) With bright light, check injector cup seat area of sleeve for scratches.
(2) If scratched, mark for replacement.
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