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TM 10-4320-324-14
(2) Inspect cylinder head for external damage or
cracks. Replace cylinder head if damaged or
cracked.
(3) Inspect cylinder head parts for obvious
defects. Replace defective parts.
(4) Check cylinder head seating surface. It must
be flat and square. Slight damage to seating
surface can be removed by grinding cylinder
head on cylinder with fine abrasive paste. If
cylinder head seating surface is more
severely damaged, re-cut with cutting device.
NOTE
Measurement must be made with intermediate
ring inserted.
(5) After refacing cylinder head seating surface, measure clearance between cylinder head bottom and cylinder
head seating surface. The measured value may not be lower than 0.23 in. (5.8 mm).
(6) Using a micrometer, measure valve springs (4) length. Minimum length is 2.204 inch (56 mm). Replace if
less than minimum length.
(7) Inspect valve rotor and spring seat (5) for damage. Replace if damaged.
(8) Inspect valves (6 and 7) for cracks and pits. Replace as required. Reface valves if required and inspect to
the tolerances specified in Table 6-1.
6-37
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