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TM 9-2320-269-34-1
REPAIR AND REPLACEMENT STANDARDS - CONTINUED
COMPONENT
MANUFACTURER'S DIMENSIONS
MAXIMUM ALLOWABLE
POINTS OF
AND TOLERANCES IN INCHES
WEAR AND CLEARANCE
MEASUREMENT
(MILLIMETERS)
IN INCHES (MILLIMETERS)
MINIMUM
MAXIMUM
INTAKE VALVES -
CONTINUED
Valve head recession
(below cylinder
head face)
0.027 (0.69)
0.047 (1.19)
Valve tip to rocker
arm clearance
(hot or cold)
0.014 (0.36)
EXHAUST VALVES
Valve list
0.465 (11.81)
Stem diameter
0.3720 (9.449)
0.3725 (9.461)
Clearance in guide
0.0013 (0.033)
0.0028 (0.071)
Face angle
45 degrees
Seat angle
45 degrees
Seat width
0.080 (2.03)
0.090 (2.29)
Maximum seat runout
0.002 (0.05)
Maximum face runout
0.002 (0.05)
Seat insert and
counterbore data:
Standard
Insert od
1.950 (49.53)
1.951 (49.55)
Counterbore diameter
1.946 (49.53)
1.948 (49.48)
0.002 (0.50) oversize
Insert od
1.952 (49.58)
1.953 (49.61)
Counterbore diameter
1.948 (49.48)
1.950 (49.53)
0.015 (0.381) oversize
Insert od
1.965 (49.91)
1.966 (49.94)
Counterbore diameter
1.961 (49.81)
1.963 (49.86)
0.030 (0.762) oversize
Insert od
1.980 (50.29)
1.981 (50.32)
Counterbore diameter
1.976 (50.19)
1.978 (50.24)
Valve head recession
(below cylinder head
face)
0.042 (1.07)
0.062 (1.57)
Valve tip to rocker
arm clearance
(hot or cold)
0.016 (0.41)
1-9

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