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TM 9-2320-269-34-1
INTAKE AND EXHAUST VALVES - CONTINUED
TABLE IV-1
INTAKE AND EXHAUST VALVE SPECIFICATIONS
INTAKE VALVES - CONTINUED
Maximum allowable seat runout
0.002 in (10.05 mm)
Seat insert and counterbore data:
Standard:
Insert, OD
2.204 - 2.205 in (55.98 - 56.00 mm)
Counterbore diameter
2.200 - 2.202 in (55.88 - 55.93 mm)
0.002 in (0.05 mm) oversize:
Insert, OD
2.206 - 2.207 in (56.03 - 56.06 mm)
Counterbore diameter
2.202 - 2.204 in (55.93 - 55.98 mm)
0.030 in (0.762 mm) oversize:
Insert, OD
2.234 - 2.245 in (56.74 - 56.77 mm)
Counterbore diameter
2.230 - 2.232 in (56.64 - 56.69 mm)
Valve head recession (below
cylinder head face):
Minimum
0.027 in (0.69 mm)
Maximum
0.047 in (1.19 mm)
EXHAUST VALVES
Valve lift
0.465 in (11.81 mm)
Stem diameter
0.3720 - 0.3725 in (9.449 - 9.461 mm)
Clearance in guide
0.0013 - 0.0028 in (0.033 - 0.071 mm)
Face angle
450
Seat angle
450
Seat width
0.080 - 0.090 in (2.03 - 2.29 mm)
Maximum permissible seat runout
0.002 in (0.05 mm)
Seat insert and counterbore data:
Standard:
Insert, outside diameter
1.950 - 1.951 in (49.53 - 49.55 mm)
Counterbore diameter
1.946 - 1.948 in (49.43 - 49.48 mm)
0.002 in (0.05 mm) oversize:
Insert, OD
1.952 - 1.953 in (49.58 - 49.61 mm)
Counterbore diameter
1.948 - 1.950 in (49.48 - 49.53 mm)
0.015 in (0.381 mm) oversize:
Insert, OD
1.965 - 1.966 in (49.91 - 49.94 mm)
Counterbore diameter
1.961 - 1.963 in (49.81 - 49.86 mm)
0.030 in (0.763 mm) oversize:
Insert, OD
1.980 - 1.981 in (50.29 - 50.32 mm)
Counterbore diameter
1.976 - 1.978 in (50.19 - 50.24 mm)
Valve head recession (below
cylinder head face):
Minimum
0.042 inch (1.07 mm)
Maximum
0.062 inch (1.57 mm)
2-162
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