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 TM 5-2410-237-23
CYLINDER HEAD INLET AND EXHAUST VALVES REPLACEMENT - CONTINUED
0245 01
CLEANING AND INSPECTION - CONTINUED
F
E
G
H
J
K
I
421-0014
Table 1. Valve Specifications - Continued.
REF
DESCRIPTION
SPECIFICATION
LTR.
E
Depth of bore in cylinder head for valve seat insert
0.483 0.005 in. (12.28 0.013 mm)
F
Valve seat insert:
2.0035 0.0005 in. (50.889 0.013 mm)
Diameter of valve seat insert for exhaust valve
2.0005 0.0012 in. (50.813 0.030 mm)
Bore in cylinder head for valve seat insert for exhaust valve
2.0485 0.0005 in. (52.032 0.013 mm)
Diameter of valve seat insert for inlet valve
2.0455 0.0012 in. (51.956 0.030 mm)
Bore in cylinder head for valve seat insert fan inlet valve
G
Angle of face of valve seat insert
30.25 0.50 degrees
H
Width of valve seat for inlet/exhaust valve:
Maximum permissible width
0.076 in. (1.93 mm)
Minimum permissible width
0.045 in. (1.14 mm)
I
Dimension from top of closed valve to face of cylinder head:
Minimum permissible dimension for exhaust valve
0.026 in. (0.66 mm)
Minimum permissible dimension for inlet valve
0.006 in. (0.15 mm)
J
Outside diameter of face of valve seat insert:
1.7680 in. (44.907 mm)
Exhaust seat
1.862 in. (47.29 mm)
Maximum permissible distance for exhaust seat
1.900 in. (48.26 mm)
Inlet seat
1.990 in. (50.55 mm)
Maximum permissible distance for inlet seat
K
Grind seat of the face of the insert by 15 degrees in order to get a
reduction of maximum seat diameter
0245 01-5
Change 1
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