TM 9-2330-356-14
Table 7-2. Repair and Replacement Standards (Con`t).
(All values in inches unless otherwise specified.)
Manufacturer's Dimensions
Maximum Allowable
and Tolerances
Component
Wear Limit
Minimum
Maximum
PISTON PIN:
Length
2,753
2.756
N/A
Diameter
0.9699
0.9901
0.001
Piston clearance
Thumb push fit
Connecting rod bushing clearance
0.0002
0.007
0.0006
PISTON RING:
Clearance in groove top
0.0035
0.0075
0.0100
Clearance in groove 2nd & 3rd compression
0.0030
0.0050
0.0080
Clearance in groove 4th oil control
0.0030
0.0020
0.0050
Gap
0.0100
0.0200
0.0400
VALVE, INTAKE:
Stem diameter
0.3410
0.3415
N/A
Stem guide clearance
0.0025
0.0028
N/A
Stem to rocker arm clearance
Cold 0.008
0.0005
Seat diameter in head
1.362
1.361
N/A
Top of valve recessed below cylinder head deck
0.439
0.433
0.500
Seat width
0.0625
0.0468
N/A
Valve seat angle
45
N/A
N/A
Valve face angle
42
N/A
N/A
VALVE, EXHAUST
Stem diameter
0.3415
0.3410
N/A
Stem guide clearance
0.0045
0.005
N/A
Stem to rocker arm clearance
0.007
0.0005
Seat diameter in head
1.361
1.362
N/A
Top of valve recessed below cylinder head deck
0.433
0.439
0.500
Seat width
0.0625
N/A
0.0466
Valve seat angle
45
N/A
N/A
Valve face angle
45"
N/A
N/A
VALVE GUIDE:
Length
1.7812
Outside diameter
0.4695
0.4690
0.4695
Bore diameter intake reamed
0.3435
0.3425
0.003
0.3455
0.3445
0.003
VALVE LIFTER:
Body diameter
0.8725
0.8730
0.003
overall length
1.510
1.550
1.500
Lifter bore
0.8755
0,8765
0.006
Free length
1,875
N/A
Total coils
5.75
N/A
Length, valve closed
N/A
1.528
Length, valve open
1.214
N/A
Load, valve closed
45 lb.
49 lb.
40 lb.
Load, valve open
N/A
83 lb.
93 lb.
CYLINDER HEAD.
Warpage (longitudinally)
0.001
0.0015
Warpage (laterally)
0.0015
0.001
* Replacement bearing only
** Shim controlled
7-9