TM 9-6115-664-13&P
5-9. CYLINDER HEAD MAINTENANCE
8. Inspect valves for scoring on the 45° face surface.
9. Inspect stems of valves and valve guides as follows:
a.
Install exhaust valve in cylinder head with stem
extending fully through the valve guide.
b.
Place a dial indicator along the side surface of
the valve stem, right at the tip of the stem. Shift
the valve stem laterally and note the amount of
movement. If movement exceeds 0.15 mm
(0.0059 in.), both the valve and the valve guide
must be replaced.
c.
Repeat steps a. and b. for the intake valve and
valve guide.
10. Measure cylinder head dimensions D, E, F. Replace
cylinder head if any dimension is beyond limit.
a.
Dimension D = 11.985 to 11.974 mm (0.4722 to
0.4718 in.)
b.
Dimension E = 109.150 to 109.200 mm (4.300 to
4.302 in.)
c.
Dimension F = 5.000 to 5.100 mm (0.1970 to
0.2010 in.)
11. Measure outlet valve dimensions G and H. Measure
inlet dimensions G and I. Replace valve if any
dimension is beyond limit.
a.
Dimension G = 7.918 to 7.930 mm (0.3120 to
0.3124 in.)
b.
Dimension H = 38.150 to 41.850 mm (1.5031 to
1.6489 in.)
c.
Dimension I = 41.850 to 42.150 mm (1.6489 to
1.6607 in.)
Figure 5-3. Cylinder Head
(Sheet 4 of 7)
5-27
