TM 9-2320-366-34-4
20-3. CYLINDER HEAD REPAIR (CONT)
c. Inspection (General).
NOTE
Replace any part that fails visual inspection or
size measurement requirements.
(1) Inspect 12 intake and exhaust valves (1) for signs of
cracking, wear, and overheating.
(2) Measure 12 intake and exhaust valves (1) for reuse.
Refer to Table 20-1 Valve Specifications.
Table 20-1. Valve Specifications
Description
Intake
7W8064
Exhaust
7W2699
Overall length
(C)
6.958-6.994 in.
(17.67-17.76 cm)
6.943-6.979 in.
(17.63-17.72 cm)
Valve head diameter
(D)
1.845-1.856 in.
(4.68-4.71 cm)
1.570-1.580 in.
(3.98-4.01 cm)
Valve face angle
(E)
29.5-30
44.75-45.25
New stem diameter
(F)
0.3147-0.3153 in.
(0.799-0.800 cm)
0.3147-0.3153 in.
(0.799-0.800 cm)
Minimum stem diameter within
area
(F)
0.3136 in.
(0.796 cm)
0.3136 in.
(0.796 cm)
New lip thickness
(H)
0.118-0.134 in.
(0.30-0.34 cm)
0.103-0.119 in.
(0.26-0.30 cm)
Minimum lip thickness
(H)
0.071 in.
(0.18 cm)
0.060 in.
(0.15 cm)
20-12
