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![]() Wear limits
Sizes and fits
Fig.
Ref.
Field
Depot
Point of measurement
No.
letter
maint
of new parts
maint
(3) Connecting rod journals and sleeve bearings (0.0100-inch undersize).
*
*
WW
3.2510 to 3.2520
Inside diameter of sleeve bearing bore
in rod.
Thickness of connecting rod sleeve
xx
0.1299 to 0.1304
0.1289
0.1295
bearing.
2.9942
YY
Inside diameter of sleeve bearing at
2.9902 to 2.9922
2.9932
proper torque tightness.
2.9860 to 2.9870
2.9845
2.9850
AD
Outside diameter of connecting rod
journal.
YY-AD
Theoretical oil clearance between
0.0032L to 0.0062L
0.0082L 0.0070L
connecting rod sleeve bearing and
crankshaft connecting rod journal.
Journal out-of-round condition
must not exceed 0.0005-inch.
(4) Connecting rod journals and sleeve bearings (0.0200-inch undersize).
*
*
WW
Inside diameter of sleeve bearing
3.2510 to 3.2520
bore in rod.
xx
Thickness of connecting rod sleeve
0.1349 to 0.1354
0.1339
0.1345
bearing.
YY
Inside diameter of sleeve bearing
2.9802 to 2.9822
2.9842
2.9832
at proper torque tightness.
AD
Outside diameter of connecting rod
2.9760 to 2.9770
2.9745
2.9750
journal.
YY-AD
Theoretical oil clearance between
0.0032L to 0.0062L
0.0082L 0.0070L
connecting rod sleeve bearing and
crankshaft connecting rod journal.
(5) Connecting rod alinement.
*
*
Allowable twist of connecting rod per
0.0005
inch of bearing length.
f. Crankshaft Assembly, Main Bearing Sleeves, and Related Components.
(1) Crankshaft journal and main bearing sleeves (standard).
*
*
N
Inside diameter of main bearing sleeve 3.9370 to 3.9380
bores in crankcase.
O.1544
0.1549
AA
Thickness of main bearing sleeve ----
0.1554 to 0.1559
ZZ
Inside diameter of main bearing sleeve 3.6252 to 3.6272
3.6292
3.63282
at proper torque tightness
(theoretical).
AE
Outside diameter of main bearing
3.6200 to 3.6210
3.6185
3.6195
sleeve journals.
Theoretical oil clearance between
ZZ-AE
0.0042L to 0.0072L
0.0092L 0.0085L
main bearing sleeve and crankshaft
main bearing journal.
336
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