TM 9-2320-266-34
Table 11-1. Engine Specifications-Continued
Connecting rod bearings
Material . . . . . . . . . . . . . . . . . . Aluminum
End play (two rods connected) . . . . . . . . . . 0.006" - 0.014"
Desired bearing clearance . . . . . . . . . . . . 0.0002" - 0.0022"
Maximum allowable bearing clearance . . . . . . . . 0.003"
Bearings available for service . . . . . . . . . . . Std., 0.010"
Crankshaft
Type . . . . . . . . . . . . . . . . . . . Counter-balanced
Number of main bearings . . . . . . . . . . . . 5
Bearing material - no. 1, 2, &4 . . . . . . . . . Aluminum
no. 5 . . . . . . . . . . .. Babbitt
no. 3 . . . . . . . . . . .. Tin aluminum
Thrust taken by . . . . . . . . . . . . . .. No.3
Main bearing clearance - desired . . . . . . . . . . 0.0005"-0.0015"
maximum allowable . . . . . 0.0025"
Endplay . . . . . . . . . . . . . . . . . 0.002"-0.009"
Main bearing journal diameter . . . . . . . . . . . 2.4995"-2.5005"
Maximum allowable out-of round . . . . . . . . . 0.001"
Maximum allowable taper . . . . . . . . . . . . 0.001"
Bearings available for service . . . . . . . . . . . Std., 0.010"
Cylinders - diameter of bore (nominal). . . . . . . . . 3.91"
Maximum allowable taper before reboring . . . . . . 0.010"
Maximum allowable out-of-round before reboring . . . . 0.005"
Maximum allowable taper after reboring . . . . . . . 0.001"
Maximum allowable out-of-round after reboring . . . . 0.001"
Type . . . . . . . . . . .
. . . . . . . Aluminum
Material. . . . . . . . . . .
. , . . . . . Alloy tin-coated
Land clearance at top of skirt .
. . . . . . . . . 0.0005"-0.0015"
Weight (std. thru 0.040" oversize)
. . . . . . . . . 594.6 grams
Length (overall) . . . . . . .
. , . . . . , . 3.45"
Pistons available for service . . .
. . . . . . . . Std., 0.005", oversize
Piston pins
Type. . . . . . . . . . . . . . . . . . . Interference fit in rod
Diameter . . . . . . . . . . . . . . . . . 0.9841''-0.9843"
Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.990" - 3.000"
Clearance in piston (at 70 F) . . . . . . . 0.00045"-0.00075"
End play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.004''-0.026"
Interference in rod
. . . . . . . . . . . . 0.0007"-0.0014"
Pins available for service . . . . . . . . . . . . Standard only
Piston rings
Compression rings - number used . . . . . . .
.2
Oil rings - number used. . . . . .
......1
Oil ring type . . . . . . . . . . . . . . . . 3-piece steel rail - chrome face
Compression ring gap . . . . . . . . . . . 0.010"-0.020"
Oil ring gap . steel rails . . . . . . . . . . . . . 0.015"-0.055"
Compression ring side clearance in groove . . . . . . . 0.0015"-0.0030"
Oil ring/steel rail side clearance in groove . , . . . . 0.0005"-0.0050"
Intake valves
Type . . . . . . . . . . . . .
....
Solid stem
Head diameter. . . . . . . .
...
. 1.775"-1.785"
Overall length . . . . . . . . . .
....
. 4.962"-4.987"
Stem diameter . . . . . . . . .
....
. 0.372"-0.373"
Stem-to-guide clearance . maximum
allowable - (measured with tools C-3973 and
dial
indicator using wobble method) . . .
. . . . . . 0.017"
Change 7
11-2
