Iveco Daily Euro 4. Manual — part 65
108441
88339
88340
88341
Figure 198
Figure 199
Figure 200
Figure 201
Fit the thermostat casing (2) with a new seal and tighten the
fixing screws (3) to the prescribed torque.
Fit the temperature sensors (1) and tighten them to the
prescribed torque.
Fit the brackets for lifting the engine and tighten the fixing
screws to the prescribed torque.
Remove the screws (2 and 3) and the covers (1 and 4)
together with the over-head seal rings.
Remove the nuts (4) and the top skid (3).
Remove the screws (1) and the shoulder plate (2).
Tilt the over-head (1) and take care not to damage the seats,
then take off the camshafts (2 and 3) from the overhead.
540650
Overhead
Overhead removal
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Description
The timing system is the type with a twin camshaft in the head
and four valves per cylinder with hydraulic tappets.
The control is transmitted by two chains:
- a double chain by 3/8” is set in motion by the driving shaft
and sets the control shafts in motion: oil pump/depressor
— high pressure pump;
- a single chain is set in motion by the high pressure control
shaft gear and sets the camshafts in motion.
The camshaft gears are mutually interchangeable and are
fitted with slots to make it possible for the phase sensor to
detect the phase.
The rocker arms, one for the valve, are kept in contact with
the corresponding cam by an hydraulic tappet, thus
eliminating the need for regular adjustments.
88055
108432
Figure 202
Figure 203
Figure 204
TIMING SYSTEM AND AUXILIARY SYSTEM DIAGRAM
1. Camshaft control gear - 2. Single chain - 3. Hydraulic
chain stretcher with anti-return device - 4. Chain -
5. Hydraulic belt stretcher - 6. Drive gear on driving shaft -
7. Fixed skid - 8. Oil pump/depressor control shaft gear —
Hydraulic power steering pump - 9. Double chain -
10. High pressure pump control shaft gear.
5412
TIMING SYSTEM
NOTE
HYDRAULIC BELT STRETCHER
WITH ANTI-RETURN DEVICE
A = Max. range: 76.9 ± 0.4 mm
B = Piston engaged: 53.6 mm
C = Min. travel for piston disengagement: 2.3 mm
D = Working travel: 24.5 mm
Both chains shall be replaced, even though the
anomaly affects only one chain: in this case, gears
(8-10), pads (7) and belt stretchers (3 and 5) shall
also be replaced (see figure 204).
Hydraulic belt stretcher (5) with anti-return device
shall be replaced every time it is disassembled. In
fact the belt stretcher cannot be assembled back
into place after the piston has come off the
hydraulic belt stretcher housing.
1. Rocker arm - 2. Reaction hydraulic tappet -
3. Valve assembly - 4. Camshaft on exhaust side -
5. Camshaft on suction side - 6. Camshaft control chain.
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Figure 205
87804
TIMING SYSTEM DIAGRAM
541210
Camshaft
Checks
The surfaces of the shaft supporting pins and of the cams
must be finely honed; if there is any sign of meshing or scoring,
replace the shaft.
75474
Figure 206
Using a micrometer (1), measure the diameter of the pins (2)
of the camshaft and, using a bore meter, measure the
diameter of the supporting seats in the overhead.
The difference between these two measurements gives the
existing clearance.
The nominal assembly clearance is 0.037
÷ 0.088 mm.
87806
Figure 207
541211
Checking cam lift and pin alignment
Place the shaft (1) on the parallels and use a centesimal dial
gauge fitted on the central support to check that the
alignment error does not exceed 0.04 mm; otherwise,
change the shaft. Check also the cam lift: it must correspond
to the prescribed value; if different values are detected,
change the shaft.
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87807
Figure 208
MAIN DATA, CAMSHAFT PINS AND SEATS
1. Intake valve camshaft seats — 2. Exhaust valve camshaft seats — 3. Intake valve camshaft — 4. Exhaust valve camshaft.
The camshaft (3) of the suction valves can be recognised through the spring cup (4) and the dowel (6).
NOTE
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