Nanni T4.155 seriers, Workshop Manual

Page: 165 / 191

60300140 (
indice A
) 4 CYLINDERS WORKSHOP MANUAL 165/191
f. Put a piece of plastigage over the crank pin of the
crankshaft.
g. Reinstall the connecting rod cap with the two assembly
bolts.
Recommended tightening torque:
First stage:
29 N.m (300kgf.cm)
2nd stage: Turn 90°
REMARK:
Make sure not to turn the crankshaft at this moment.
h. Remove the two assembly bolts, the connecting rod cap
and the lower shell bearing. (Refer to description in (b) and
(c) previously).
i. Measure the plastigage at the largest location.
Lubrication clearage:
Nominal
0.036 – 0.054 mm
Dimension less than 0.25 and dimension less than
0.50:
0.037 – 0.077 mm
Clearance limit: 0.10 mm
Replace the shell bearings if the clearance limit is exceeded. If
necessary, replace the crankshaft.
ADVICE: When a standard shell bearing is used, replace
it with a shell bearing of the same number. If it is not
possible to determine the shell bearing number, choose
an appropriate one by adding the numbers stamped on
the connecting rod cap and the crankshaft, then select a
shell bearing for which the number corresponds to the
total of these numbers. There are five nominal shell
bearing sizes, identified respectively by the numbers "2",
"3", "4", "5" and "6".