TM 5-3825-226-24
VALVE SEATS AND INSERTS
INTAKE VALVE (with valve seat insert)
(1)
Diameter of the valve seat
insert ......... 2.1500 ± .0005 in. (54.610 ± 0.013 mm)
(2)
Bore in head for valve seat
insert ........ 2.1470 ± .0005 in. (54.534 ± 0.013 mm)
(2)
Depth of bore in head for valve
seat insert .............442 ± .002 in. (11.23 ± 0.05 mm)
(3)
Maximum permissible width of the face of the
valve seat insert ........................... 120 in. (3.05 mm)
(4)
Distance from head of valve to cylinder head face:
Maximum permissible (valve closed) 068
in.
(1.73
mm)
Minimum permissible (valve closed) 036 in. (0.91 mm)
(5)
Angle of the face of the valve seat insert 30 1/2 ± 1/2°
(6)
Outside diameter of the face of the valve
seat insert .......... 2.045 ± .005 in. (52.23 ± 0.13 mm)
Maximum permissible ............. 2.065 in. (52.45 mm)
(7)
Angle to grind face of seat insert (to get a reduction
of maximum seat diameter) ................................. 15°
EXHAUST VALVE
(1)
Depth of bore in head for valve
seat insert ............. 442 ± .005 in. (11.23 ± 0.13 mm)
(2)
Diameter of valve
seat insert .. 1.9120 ± .0005 in. (48.565 ± 0.013 mm)
(3)
Bore in head for valve
seat insert .. 1.9090 ± .0005 in. (48.489 ± 0.013 mm)
Maximum permissible width of the face
of the valve seat insert ................. 105 in. (2.67 mm)
(4)
Distance from head of valve to cylinder head face:
Maximum permissible (valve closed) ........................085 in. (2.16 mm)
Minimum permissible (valve closed)..........................050 in. (1.27 mm)
(5)
Angle of the face of the valve seat insert............................... 45 1/2 ± 1/2°
(6)
Outside diameter of the face of the
valve seat insert ............................... 1.735± .005 in. (44.07 ± 0.13 mm)
Maximum permissible ............. 1.760 in. (44.70 mm)
(7)
Angle to grind face of seat insert (to get a reduction
of maximum seat diameter) ................................ 15°
1-14
