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TM 10-3930-669-34
Table 3-1. Wear Limits, Fits, and Tolerances
Component
Minimum
Maximum
Exhaust Valves - continued:
Seat bore diameter in head nominal
1.5748 in.
1.5757 in.
(40.0000 mm)
(40.0250 mm)
Seat outside diameter
1.5803 in.
1.5811 in.
(40.1400 mm)
(40.1600 mm)
Valve seat width
0.0591 in.
0.0787 in.
(1.5000 mm)
(2.0000 mm)
Seat angle
45°
Valve rim thickness
0.0197 in.
0.0591 in.
(0.5000 mm)
(1.5000 mm)
Valve recessed below cylinder head seating surface
0.2000 in.
0.2205 in.
(5.0800 mm)
(5.6000 mm)
Valve Guides:
Outside diameter - nominal
0.5923 in.
0.5927 in.
(15.0450 mm)
(15.0560 mm)
Bore in cylinder head diameter
0.5905 in.
0.5909 in.
(15.0000 mm)
(15.0110 mm)
Pressed in inside diameter
0.3149 in.
0.3155 in.
(8.0000 mm)
(8.0150 mm)
Valve springs:
Total coils
7
Normal length
2.3230 in.
2.3976 in.
(59.0000 mm)
(60.9000 mm)
Minimum length
2.2047 in.
(56.0000 mm)
Cylinder Head:
Distance between cylinder head bottom and
0.2323 in.
0.2519 in.
cylinder head joint w/ shim bolts.
(5.9000 mm)
(6.4000 mm)
Stud nominal length
8.2870 in.
8.3268 in.
(210.5000 mm)
(211.5000 mm)
3-3
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