TRUCK SERVICE MANUAL
ENGINE
Worn limits as stated in this manual indicate that the
Specifications and Wear Limits Group 18
part may be reused if it is at the worn limit. Discard only
if it exceeds the worn limit. All engine models are the
same unless otherwise stated. Limits are given in U.S.
and Metric measurements. All Metric units are enclosed
in brackets [].
WEAR LIMITS
New
New
Worn
Part or Location
Minimum
Maximum
Limit
GROUP 1. CYLINDER BLOCK
Installed Camshaft Bushing Inside Diameter
1.999
2,0005
2.0015
[50.77]
[50.813]
[50.838]
Camshaft Bushing Bore in Block
2.1285
2.1295
2.1305
[54.064]
[54.089]
[54.115]
Cylinder Liner Counterbore
Inside Diameter
6.5615
6.5635
[166.662]
[166.713]
Counterbore Depth
0.350
0.352
0.412
[8.89]
[8.94]
[10.46]
Liner Protrusion
0.003
0.006
[0.08]
[0.15]
Liner-to-B lock Clearance
Lower Bore
0.002
0.008
[0.05]
[0.20]
Cylinder Block Lower Liner Bore
6.124
6.126
[155.55]
[155.60]
Main Bearing Bore
4.7485
4.750
4.7505
[120.612]
[120.65]
[120.663]
Main Bearing Bore Alignment
See Page
347
Main Bearing Capscrew
Tightening Ft-Lb. [kg m]
1. Tighten to
145
155
[20.05]
[21.44]
2. Advance to
300
310
[41.49]
[42.87]
3. Loosen
All
All
4. Tighter to
140
145
[19.36]
[20.05]
5. Advance to
30 deg
30 deg
Cylinder Block Height From Main Bearing
Bore Center Line
19.004
19.006
18.994
[482.70]
[482.75]
[482.45]
From Top of Alignment Bar
16.629
16.631
16.619
[422.38]
[422.43]
[422.12]
Cylinder Liner Counterbore
0.350
0.352
0.412
[8.89]
[8.94]
[10.46]
Cylinder Liner Counterbore Shims
Part No. 143938
0.0063
0.007
[0.160]
[0.18]
Part No.,143939
0.0072
0.0088
[0.183]
[0.223]
423