Measuring The Mounting Clearance Of Big End Pins; Fitting The Connecting Rod Caps; Check Of Piston Protrusion - Iveco VECTOR Series Technical And Repair Manual

VECTOR 8 ENGINES
Measuring the mounting clearance of big end
pins
Figure 72
To check the clearance proceed as follows:
- clean all the parts accurately and remove any traces of oil;
- arrange the bearings in their seats;
- place a length of calibrated wire (1) on the drive shaft pins
(2).
Figure 73
α
- connect the connecting rods to the journals of the
crankshaft and fit the connecting rod caps together with
the half bearings;
- tighten the screws, which have been previously lubricated
with UTDM oil, with a dynamometer spanner to a
prescribed torque;
- remove the cap.
Measure the existing play by comparing the width of the
calibrated wire with the graduated scale shown on the package
which contained the wire. If the measured play is not equal to
the prescribed value, replace the bearing halves and repeat the
check.

Fitting the connecting rod caps

- Thoroughly clean the journals of the crankshaft and the
big end bearing shells of the remains of the calibrated wire.
Lubricate them and refit the connecting rod caps
tightening the nuts as described for measuring the
assembly clearance.
Print P2D32V001E
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
Upon final reassembly, the big end cap fastening
!
screws must always be replaced.
- Manually check that the connecting rods can be moved
sideways on the drive shaft pins.

Check of piston protrusion

Figure 74
16795
- When the rod—piston group have been assembled, check
for piston protrusion at T.D.C. from the upper engine
block level.
- The protrusion should be from — 0.21 to +0.59 mm.
16896
33
16800
Base - April 2006