TM 5-4310-354-14
Table 5-2. Repair and Replacement Standards - Continued
Maximum
New parts
allowable
Component
wear/
clearance
Minimum
Maximum
ENGINE - continued
Intake Valves - continued:
Top of valve recessed below cylinder head deck ..............................................
0.0210 in.
(0.5334 mm)
Valve seat angle ......................................................................................................
30
Exhaust Valves:
Head diameter .........................................................................................................
1.495 in.
1.505 in.
(37.973 mm)
(38.227 mm)
Stem diameter .........................................................................................................
0.3740 in.
'0.3750 in.
0.0025 in.
(9.4996 mm)
(9.5250 mm)
(0.0635 mm)
Stem-to-guide clearance ........................................................................................
0.0015 in.
0.0035 in.
0.0060 in.
(0.0381 mm)
(0.0889 mm)
(0.1524 mm)
Stem-to-rocker arm clearance, hot........................................................................
0.0150 in.
(0.381 mm)
Seat diameter in head ............................................................................................
1.451 in.
1.456 in.
(36.855 mm)
(36.982 mm)
Seat width in head ..................................................................................................
5/64 in.
1/8 IN.
(1.9844 mm)
(3.175 mm)
Top of valve recessed below cylinder head deck ..............................................
0.0210 in.
(0.5334 mm)
Valve seat angle ......................................................................................................
45
Valve Guide:
Length .......................................................................................................................
2.7244 in.
2.7444 in.
(69.1998 mm)
(69.7078 mm)
Outside diameter .....................................................................................................
0.6265 in.
0.6270 in.
(15.9131 mm)
(15.9258 mm)
Bore diameter intake valve guide, rear ................................................................
0.3740 in.
0.3750 in.
0.0030 in.
(9.4996 mm)
(9.5250 mm)
(0.0762 mm)
Bore diameter exhaust valve guide, ream ...........................................................
0.3750 in.
0.3760 in.
0.0030 in.
(9.5250 mm)
(9.5504 mm)
(0.0762 mm)
Depth below cylinder head deck, all ....................................................................
1.370 in.
1.380 in.
(34.798 mm)
(35.052 mm)
Tappet, Valve Lifter (push rod) :
Body diameter ..........................................................................................................
0.7485 in.
0.7490 in.
0.0030 in.
(19.0119 mm)
(19.0246 mm)
(0.0762 mm)
Overall length ...........................................................................................................
2.245 in.
2.255 in.
(57.023 mm)
(57.277 mm)
Clearance in bore (block) .......................................................................................
0.0005 in.
0.0015 in.
0.0050 in.
(0.0127 mm)
(0.0381 mm)
(0.127 mm)
Valve Springs, Intake and Exhaust:
Free length ...............................................................................................................
1.796 in.
1.836 in.
(45.6184 mm)
(46.6344 mm)
Total coils .................................................................................................................
6-1/4
Wire diameter ..........................................................................................................
0.177 in.
(4.4958 mm)
Outside diameter .....................................................................................................
1.292 in.
1.302 in.
(32.8168 mm)
(33.0708 mm)
Test load at 1.492 in. (37.8968 mm) ....................................................................
72 pounds
82 pounds
(32.66 kilograms)
(37.20 kilograms)
Test load at 1.082 in. (27.4828 mm) ....................................................................
163 pounds
180 pounds
(73.94 kilograms)
(81.65 kilograms)
5-16
