Engine Iveco Vector 8. Manual — part 35

Figure 15

Figure 16

MAIN DATA ABOUT CAMSHAFT PINS

Camshaft pin and cam surfaces shall be absolutely smooth; if they show any traces of seizing or scoring replace the camshaft

and the bushes.

* Data concerning the distribution shaft assembled on the engines with serial numbers starting from 01/01/2005

- Check the alignment of the supporting pins, setting the

camshaft as illustrated.
By means of a magnetic based comparator (1) read the
alignment error that must not exceed the one indicated on
the figure; otherwise replace the distribution shaft.
Check the useful cam lift that must be the same for both
the inlet and exhaust; if it is not, change the camshaft.

- Using a feeler gauge (1), check that the clearance between

the plate (3) retaining the camshaft (2) to the cylinder
assembly and the driving gear (4) is from 0.070 to 0.175
mm.
Check that the teeth of the driving gear (4) are neither
broken nor excessively worn.
The driving gear (4) of the camshaft is removed with an
extractor.
For assembly, heat the gear (4) to reach a temperature
difference of 250

°C between it and the camshaft.

Checking cam lift and pin alignment

Replacing the camshaft idle gear

Figure 17

89794

TIMING SYSTEM
Camshaft

16806

16808

14

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

VECTOR 8 ENGINES

Base - April 2006

Print P2D32V001E

MAIN DATA OF THE BUSHINGS SUPPORTING THE CAMSHAFT AND SEATS IN THE CRANKCASE.

The bushings must have been forced into their seats. The internal surfaces must be smooth with no sign of seizure or wear.

SEAT Ø 86.000 ÷ 86.030
PIN Ø 79.950 ÷ 79.968

Thickness variation
max 0.025 mm

Heigth to be
obteined after
driving the bushes

Heigth to be
obteined after
driving the bushes

Thickness variation
max 0.025 mm

SEAT Ø 86.000 ÷ 86.030
PIN Ø 79.950 ÷ 79.968

82233

Figure 18

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

15

VECTOR 8 ENGINES

Print P2D32V001E

Base - April 2006

Lubricate the tappets and fit them in their seats.

Lubricate the camshaft bushings and fit the shaft, taking care
not to damage the supporting bushings. Fit the nozzles, check-
ing that the centring pins are correctly positioned in the cylin-
der assembly.

Having to change the bushings, use one drift for removal and
assembly. The camshaft assembly clearance must be from
0.070 to 0.150 mm.

OUTPUT SHAFT
Measuring journals and crankpins

- Measure the pins of the bench and of the connecting rod

with the micrometric calliper and establish if the engine
shaft and/or the connecting rod and bench bearings need
to be replaced.

It is recommended to insert the found values in the
proper table.

During assembly, the bushings must be facing so that
the lubrication holes match those in the seats.

On completing assembly, bore the bushings to the diameter
shown in Figure 18.

Changing the tappets

- The surface of the tappets in contact with the cams of the

camshaft must be perfectly smooth with no dents.
Slight dents can be removed with an extremely fine
abrasive stone.
Changing the tappets, due to excessive clearance in the
seats, involves fitting oversized tappets after boring the
seats with an appropriate reamer.

Fitting tappets and camshaft

We recommend to lubricate the tappets carefully by
keeping them immersed for 30’.

82233

Changing the bushings

Figure 19

Figure 20

NOTE

NOTE

NOTE

89801

16

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

VECTOR 8 ENGINES

Base - April 2006

Print P2D32V001E

Figure 21

Figure 22

1

2

3

4

5

MIN. DIA.
MAX. DIA.

MIN. DIA.

MAX. DIA.

1

2

3

4

MAIN JOURNALS

Table for entering

main journal and

crankpin

measurements

CRANKPINS

The engine shaft is nitrided and its grinding is not
foreseen

105.000
104.980

121.995
121.975

CRANKSHAFT JOURNAL DATA

Check the state of the main journals and crankpins of the crankshaft. They must show no sign of scoring, ovality or excessive

wear. The data given refer to the nominal pin diameter.

8821

37710

NOTE

SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

17

VECTOR 8 ENGINES

Print P2D32V001E

Base - April 2006