Iveco Daily. Manual

62386

50676

75461

75942

Figure 146

Figure 147

Figure 148

Figure 149

Before assembly, check the flexibility of the valve springs with
the tool 99305047. Compare the load and elastic
deformation data with those of the new springs given in the
following figures.

MAIN DATA TO CHECK INTAKE AND EXHAUST

VALVE SPRINGS

COMPLETE ROCKER ARM ASSEMBLY

The rocker arm assembly is composed of the rocker arm (1),
hydraulic tappet (3), made integral with each other by the clip
(2).

540665

VALVE SPRINGS

ROCKER ARMS — TAPPETS

CROSS-SECTION OF THE HYDRAULIC TAPPET

A = 32.44

±0.3, end of stroke

B = 31.30, working position
C = 29.75

±0.25, start of stroke

F1A ENGINE

AILY

366

Base - May 2004

Height

Under a load of

H 54

Free

H1 45

P 243

±12

H2 35

P1 533

±24

75463

75462

75587

Figure 150

Figure 151

Figure 152

Checks

The sliding surface of the tappets must have no scoring/dents;
replace them if they do.

Using a micrometer, measure the diameter of the tappets
and, using a bore meter, measure the diameter of the seats
in the cylinder head; the difference in the measurements will
give the assembly clearance.

Lubricate the stem of the valves (1) and insert them into the
associated valve guides (4) according to the position marked
during removal. Using tool SP.2264 (2), mount the oil seals
(3) on the valve guides (4).

MAIN DATA HYDRAULIC TAPPETS — SEATS

Position the springs (8) and plates (7) on the cylinder head
(5).

Fit the part (4) of tool 99360260 onto the cylinder head (5)
and secure it with the screws (3).

Fit the part (2) of tool 99360260 onto part (4), screw down
the nut (1) so that by compressing the springs (8) it is possible
to insert the retaining cotters (6); then unscrew the nut (1)
checking that the cotters (6) have settled in correctly.

Repeat these operations on the remaining valves.

ASSEMBLING CYLINDER HEADS

F1A ENGINE

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75464

75465

75466

75467

75468

Figure 153

Figure 154

Figure 155

Figure 156

Figure 157

Fit the thermostat casing (5) with a new seal and tighten the
fixing screws (4) to the prescribed torque.

Mount temperature sensors (1 and 2), and tighten them at
prescribed torque.

For tightening sensor (2), use wrench SP.2262 (3).

Mount the temperature sensors (1 and 2) and, using the
wrench SP.2263 (3), tighten them to the prescribed torque.

Position the overhead (2) together with the pins 99360614
(1) on the mounting SP. 2271.

Take out the screw (4) with the washer (5) beneath fastening
the toothed pulley (3).

Using the extractor 99340028 (2) extract the toothed pulley
(1) driving the camshaft.

Using four self-tapping screws (2), apply the tool SP. 2325 (3)
to the seal (1) and with the extractor (5 and 6) remove the
seal (1) from the overhead (4).

Remove the circlip (1) and take off the cover (2) together
with the seal (3).

540650

Overhead

Overhead removal

The screws (2) must be screwed down so they get
positioned at the dimension shown in the figure.

NOTE

F1A ENGINE

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Base - May 2004

1. Camshaft on intake side — 2. Hydraulic tightener —

3. Camshaft on exhaust side — 4. MORSE chain —

5. Rocker arms — 6. Hydraulic reacting tappet —

7. Valve assembly.

Description

The timing system is the type with a twin camshaft in the head
and four valves per cylinder with hydraulic tappets.
Motion is transmitted by the crankshaft, via a toothed belt,
to the gear keyed onto the intake valve drive shaft. The drive
transmission of the exhaust valve drive shaft takes place via
a MORSE-type chain kept under tension by a hydraulic
tightener.
The toothed belt, moreover, drives the water pump and the
high-pressure pump CP3 and is kept at the right tension by
an automatic tightener roller.
The four valves move by the action of the “free” rocker arms
(with no supporting shaft).
The rocker arms, one per valve, are always in contact with
the corresponding cam and are kept in this position by a
hydraulic reacting tappet, thereby eliminating the need for
periodical adjustment.

75469

75471

75470

75472

75473

Figure 158

Figure 159

Figure 160

Figure 161

Figure 162

Take out the screws (1) and remove the rear cover (2)
together with its gasket.

Insert a suitable pin (2) in the hole (

⇒) of the chain drive (3).

Take out the screws (4) and (6) with their washers (5) for
fixing gears to the camshafts.
Take out the screws (7) and remove the chain drive (3) from
the overhead (1).

Turn over the overhead (1) and, taking care not to damage
the seats, extract the camshafts (2) and (3) from it.

TIMING SYSTEM DIAGRAM

5412

TIMING SYSTEM

1 CLOSING

INTAKE
OPENING

2 CLOSING

EXHAUST
OPENING

3 FIRING

ORDER
1-3-4-2

T.D.C

B.D.C

F1A ENGINE

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AILY

Base - May 2004

Content .. 95 96 97 98 ..

Iveco Daily. Manual - part 97