Iveco Daily. Manual

88338

88339

88340

88341

Figure 148

Figure 149

Figure 150

Figure 151

Fit the thermostat casing (3) with a new seal and tighten the
fixing screws (4) to the prescribed torque.

Fit the temperature sensors (1 and 2) 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

556

F1C ENGINE

AILY

Base - May 2004

1. Rocker arm - 2. Reaction hydraulic tappet -

3. Valve assembly - 4. Camshaft on exhaust side -

5. Camshaft on suction side - 6. Camshaft control chain.

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

88342

87804

Figure 152

Figure 153

Figure 154

TIMING SYSTEM AND AUXILIARY SYSTEM DIAGRAM

1. Camshaft control gear - 2. Single chain - 3. Hydraulic

chain stretcher with anti-return device - 4. Chain -
5. Drive gear on driving shaft - 6. Fixed skid - 7. Oil

pump/depressor control shaft gear — Hydraulic power

steering pump - 8. Double chain -

9. High pressure pump control shaft gear.

TIMING SYSTEM DIAGRAM

5412

TIMING SYSTEM

Hydraulic chain stretcher (3, Figure 153) equipped
with anti-return device must be replaced every
time it is disassembled: moreover, it cannot be
re-assembled after the piston has escaped from the
hydraulic chain stretcher seat.

NOTE

Revi - February 2005

F1C ENGINE

557

AILY

75474

87806

87807

Figure 155

Figure 156

Figure 157

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.

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.

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.

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).

558

F1C ENGINE

AILY

Base - May 2004

88343

88344

88340

88346

88347

Figure 158

Figure 159

Figure 160

Figure 161

Figure 162

Lubricate the new seal rings (1) with engine oil and fit them
on the covers (2).
Fit the covers (2) on the overhead, drive in the fastening
screws (3) and tighten them to the prescribed torque.

Lubricate the support pins of the suction camshafts (2) and
exhaust camshafts (4) and fit them on the overhead (1).

Fit the top skid (3) and drive in the nuts (4), then tighten them
to the prescribed torque.
Fit the shoulder plate (2) and drive in the screws (1), then
tighten them to the prescribed torque.

Position the camshafts (3 and 4) so that the pins 99360614
(1) can be inserted in the camshaft slots (2) through the
over-head threaded holes.

Rotate the driving shaft so that the tool 99360615 (1) can be
inserted in the shaft crank hole through the cylinder block
hole, in order to stop the engine in the timing system setting
condition.

AUXILIARY ORGAN CONTROLS

During this operation do not exchange the
assembly position of the shafts.

The suction camshaft can be recognised (2)
through the dowel (3) on the front side and the
retainer on the rear side.

In addition, take care not to damage the support
seats of the over-head shafts.

NOTE

F1C ENGINE

559

AILY

Base - May 2004

Content .. 163 164 165 166 ..

Iveco Daily. Manual - part 165