TM 5-3810-294-34
Table 1-4. Repair and Replacement Standards (Continued)
Manufacturing Dimensions
Maximum allowable
and tolerances inches
wear or clearance
Component
From
To
maximum
PISTON PINS (Continued):
Clearance in rod ..................................................... 0.0008
0.0011
Clearance in piston................................................. 0.0001T
0.0002T
PISTON RINGS:
Compression rings:
Number used on each piston .........................
3
Size - inch ...................................................... 3/32
3/32
Oil rings:
Number used on each piston .........................
1
Size - inch ...................................................... 3/16
3/ 16
Ring gap:
Compression ......................................... 0.013
0.025
U-Flex-No gap at ring joint (Gap
built between ring segments)
Fit in groove
Top
....................................................... 0.0035
0.005
(Comp)
Second ....................................................... 0.0035
0.005
(Comp)
Third
............................................0.0035 0.005
(Comp)
Fourth
....................................................... 0.001
0.003
(Oil Control)
INTAKE VALVES:
Stem diameter ....................................................... 0.434
0.435
Valve guide bore .................................................... 0.4365
0.4380
Stem clearance ...................................................... 0.0015
0.0040
Valve to rocker arm clearance (hot) .......................
0
0
Hydraulic lifter bleed-down rate
(1/2 inch travel) 6 Sec Min
Width of valve seat ................................................. 3/32
1/16
Note Valve face angle is 15 degree
EXHAUST VALVES:
Stem diameter ....................................................... 0.433
0.434
Valve guide bore .................................................... 0.4365
0.4380
Stem clearance in guide......................................... 0.0025
0.0050
Valve to rocker arm clearance (hot) ......................
0
Hydraulic lifter bleed-down rate
(1/8 inch travel) 6 Sec Min
Width of valve seat - inch ....................................... 3/32
1/8
Note Valve face angle is 15 degrees
VALVE GUIDE:
Distance above head (Intake) ................................ 1 1/16
Distance above head (Exhaust) ............................
1
VALVE TAPPET:
Clearance in block.................................................. 0.0015
0.0040
VALVE SPRINGS:
Free length
Inner (new) ..................................................... 2-9/32
Outer (new) .................................................... 2-19/32
Length-valve open
Inner (new) .................................................... 1.495
Outer (new) .................................................. 1.620
Lbs. pressure-valve open
Inner
...................................................86
93
Outer
....................................................... 121
129
VALVE ROCKER ARM CLEARANCE
IN SHAFT
............................................0.0015 0.0040
VALVE TIMING:
22
Intake opens (before TDC) ....................................
58
Intake closes (after BDC) ......................................
Exhaust opens (before BDC) .................................
62
18
Exhaust closes (after TDC) ...................................
OIL PUMP:
Body gear end clearance ....................................... 0.0015
0.009
Pump body to gear clearance ................................ 0.0046
0.0086
1-9
