Engine Iveco Vector 8. Manual — part 3

ENGINE COOLING

The cooling system is reponsible for cooling the engine casing and the engine lubrication oil inside the heat exchanger (2).

From the circulation pump (1), the coolant is sent to the heat exchanger (2) where the engine lubrication oil is cooled.
From here the coolant reaches the engine block and, after having cooled the cylinders, is sent to the thermostat casing.

Depending on the temperature, the coolant is either recirculated by the water pump (1) or sent to the radiator.

Figure 6

103273

1. Circulation pump - 2. Engine lubrication water/oil heat exchanger - 3. Thermostat casing

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SECTION 1 - GENERAL SPECIFICATIONS

VECTOR 8 ENGINES

Base - April 2006

Print P2D32V001E

COOLING SYSTEM ASSEMBLY

Figure 7

Coolant coming from the cooling radiator being drawn into the pump.

Coolant coming from the engine block passing through the thermostat casing (temperature < 70˚C) sent to the
circulation pump.

Coolant coming from the engine block passing through the thermostat casing (thermostat valve opening
temperature around 70˚C, complete travel 85˚C) to the cooling radiator.

112492

1. Thermostat casing - 2. Radiator - 3. Coolant circulation pump - 4. Cooling fan.

A

B

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SECTION 1 - GENERAL SPECIFICATIONS

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VECTOR 8 ENGINES

Print P2D32V001E

Base - April 2006

VARIANT FOR APPLICATIONS WITH BRAKE AIR COMPRESSOR

Figure 8

103509

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SECTION 1 - GENERAL SPECIFICATIONS

VECTOR 8 ENGINES

Base - April 2006

Print P2D32V001E

Rif.

Description

1

Circulation pump

2

Engine lubrication water/oil heat exchanger

3

Air system compressor (for DRAGON applications)

AIR/AIR INTERCOOLER SYSTEM (DRAGON, G-DRIVE AND GRIFFON APPLICATIONS)

Figure 9

Air drawn in by the filters and sent to the turbochargers.

Air drawn in from the heat exchanger (air/air intercooler) to the main intake manifold and from there to the bank
intake manifolds.

Hot supercharing air coming from the two turbines to the heat exchanger (air/air intercooler).

112484

1. Air filter - 2. Turbochargers - 3. Heat exchanger (air/air intercooler)

A

B

The system has been designed to lower the temperature of the supercharing air before it is sent to the cylinders.
The air is drawn in and filtered by means of two dry filters and introduced inside the turbochargers.
The air is compressed, with a consequent increase in temperature and, after having been collected in a single pipe, it is sent to the
intercooler.
This heat exchanger, which the flow of air produced by the fan fastened axially and driven by the crankshaft comes into contact
with, cools the compressed air and sends it, via the pipe, to the main manifold and from there to the two intake manifolds, located
on each bank.
On versions for cold climates, there are two pre-heating heaters on the main manifold designed to assist engine starting at low
temperatures (ambient temperature up to - 25˚C).
Heater voltage: 24V DC
Peak current: 240

± 50˚

Stabilization current: 83

± 12A.

Together with the above mentioned heaters, these versions also have a resistance for heating the engine lubrication oil and a fuel
heater on the diesel pre-filter.

C

SECTION 1 - GENERAL SPECIFICATIONS

11

VECTOR 8 ENGINES

Print P2D32V001E

Base - April 2006