TM 5-3825-213-35
Table I. Engine Repair and Replacement Standards
Manufacturer's
dimensions and
Desired
Maximum
Maximum
tolerances in
clearance
allowable
allowable
inches
wear
clearance
Min.
Max.
Min.
Max.
Connecting Rods
Side play -----------------------------------------------------
0.005
0.009
------
------
------
0.010
Bore diameter -----------------------------------------------
3.250
3.252
Pin bushing id -----------------------------------------------
1.500
1.501
------
------
0.005
Bearing running clearance -------------------------------
------
------
0.002
0.005
------
0.005
Skirt diameter -----------------------------------------------
5.372
5.374
------
------
0.005
Skirt clearance in liners-----------------------------------
------
------
0.004
0.007
------
0.010
Piston Pin
Diameter------------------------------------------------------
1.499
1.500
------
------
0.002
Clearance in rod bushing---------------------------------
------
------
0.001
0.002
------
0.002
Piston Rings
No. 1
Width-----------------------------------------------------
0.093
0.094
------
------
0.003
Clearance in groove ---------------------------------------
------
------
0.004
0.006
------
0.007
Gap ------------------------------------------------------
------
------
0.017
0.032
------
0.037
No. 2
Width-----------------------------------------------------
0.123
0.124
------
------
0.003
Clearance in groove ---------------------------------------
------
------
0.003
0.005
------
0.006
Gap -----------------------------------------------------
------
------
0.017
0.032
------
0.037
No. 3
Width-----------------------------------------------------
0.124
0.125
------
------
0.003
Clearance in groove----------------------------------
------
------
0.002
0.004
------
0.005
Gap - ----------------------------------------------------
------
------
0.017
0.032
------
0.037
No. 4
Width-----------------------------------------------------
0.248
0.249
------
------
0.004
Clearance in groove ---------------------------------------
------
------
0.002
0.004
------
0.005
Gap -------------------------------------------------------
------
------
0.017
0.032
------
0.037
Crankshaft
End play -----------------------------------------------------
------
------
0.004
0.008
------
0.010
Journal diameter (main bearings)----------------------
3.748
3.749
------
------
0.007
Main bearing running clearance ------------------------
------
------
0.002
0.005
------
0.007
Connecting rod journal------------------------------------
3.248
3.249
------
------
0.005
Camshaft
Bearing id ----------------------------------------------------
2.250
2.251
------
------
0.003
Bearing clearance in crankcase ------------------------
------
------
0.005
0.008
------
0.010
Journal diameter -------------------------------------------
2.247
2.248
------
------
0.003
Bearing running clearance -------------------------------
------
------
0.002
0.004
------
0.006
Valves
Guides, ream at assembly
Intake ----------------------------------------------------
0.436
0.437
------
------
0.002
Exhaust--------------------------------------------------
0.437
0.438
------
------
0.002
Stem diameter
Intake ----------------------------------------------------
0.434
0.435
------
------
0.002
Exhaust--------------------------------------------------
0.434
0.435
------
------
0.002
Stem-to-guide clearance
Intake ----------------------------------------------------
------
------
0.002
0.004
------
0.005
Exhaust--------------------------------------------------
------
------
0.003
0.005
------
0.006
4
