Table 1-1. Repair and Replacement Standards-Continued
Manufacturer's
Desired
Maximum
dimensions
clearance
allowable
Component
and tolerance
wear and
in inches
clearance
Minimum
Maximum
Minimum
Maximum
Main bearing bore I.D
3.7520
3.7530
3.7535
Main bearing cap pad width
6.7485
6.7495
6.7610
Main bearing cap width
6.7535
6.7545
6.7525
Tappet bore inside diameter
Valve
1.1000
1.1010
1.1025
Injector
1.4000
1.4010
1.4025
Out-of-round
0.0015
Cylinder liner inside diameter at 70F less
protective coating
5.4995
5.6010
5.6050
Out-of-round packing ring area
.0015
Out-of-round above piston ring travel
.003
Cylinder liner outside diameter
Packing ring lands
5.9930
5.9970
5.9900
Top flange (press fit area)
6.5015
6.5035
6.5015
Cylinder liner flange:
Thickness
0.3550
0.3560
0.3550
Protrusion above block
0.0040
0.0060
0.0040
Cylinder liner to block packing ring bore
clearance 0.0020 0.0080
Crankshaft
Main journal O.D
3.4990
3.5000
3.4965
Rod journal O.D. 158370
3.1240
3.1260
3.1216
Rear main (thrust) width
1.9400
1.9420
1.9440
Fillet radii
0.140
0.160
Crankshaft adaptor O.D
4.749
4.751
4.747
Main bearing shell thickness
0.12465
0.12526
0.1230
Main bearing journal clearance
0.0015
0.0045
0.0070
Crankshaft end clearance
0.005
0.015
0.0220
Thrust bearing thickness
0.1510
0.1530
0.1490
Connecting Rod
Connecting rod bearing shell
Thickness-STD
0.09425
0.09476
0.09295
Journal clearance
0.0015
0.0045
0.0070
Length center to center
8.1920
8.1940
Piston pin bushing bore inside diameter
(in rod)
1.9995
2.0005
Crankpin bore inside diameter
Standard
3.3160
3.3165
Maximum out-of-round
0.0015
Bore misalignment
Bend
0.0040
Twist
0.0100
Rod bolts:
Fit in rod
0.0007
0.0003
0.0006
Pilot outside diameter
0.5640
0.5645
Minimum outside diameter
0.4790
0.4830
0.4775
Hole inside diameter in cap
0.5638
0.6643
0.5645
Assembled side clearance
Rod to rod
0.0080
0.0160
0.0180
Rod to piston boss
0.0800
0.0700
Piston pin bushing inside diameter
1.7510
1.7516
1.7525
Bolt pad corner radius standard
0.2500
0.2700
Piston:
Piston pin bore inside diameter (70F)
1.7485
1.7489
1.750
Piston pin outside diameter
1.7488
1.7490
1.7478
Piston ring-to-groove clearance
New ring with piston wall
0.002
0.006
1-5
