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TM 10-4320-343-14
6.6.2 Cylinder Head Repair.
(continued)
e .
f .
g .
Figure 6-3.
Checking Cylinder Head Seating Surface.
Check that cylinder head seating surface (figure 6-3) is flat and square.
Slight damage to seating surface can be ground.
After reworking, measure clearance between cylinder head bottom
head seating surface.
The measured value may not be lower than
(5.8 m).
Insert valve in seat and measure distance from crown of valve to
seating surface (figure 6-4).
If distance exceeds specification
v a l v e , ( t a b l e 6 - 1 ),
seat must be replaced.
and cylinder
0.23 inch
cylinder head
s on either
Figure 6-4.
Valve Depth Measurement.
6-13
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