Cooling System - Alfa Romeo 159 Training Material

Fiat Auto S.p.A.
ENGINE
ALFA 159 TRAINING MATERIAL
After Sales Training
Hydraulic features
Working using engine oil
Flow > 3.8 l/min
Working pressure < 10 bars
Filters integrated on valves (fine mesh 300 µm).
Electrical characteristics:
Frequency signal in range from 200 to 250 Hz.

Cooling system

FUNCTION: To cool the various parts of the engine, warm the air for the climate control system and cool engine oil.
FEATURES: This is a total flow bypass cooling system: in other words, the coolant can be entirely recirculated by the
pump suction if it is too cold at engine outlet.
The coolant pump is built into the engine block on timing side and is driven by the balancing shaft drive chain.
An o-ring is arranged between the cylinder block and the coolant pump. Both engine versions fit a heat exchanger for
the engine oil.
This is positioned outside the engine block and is positioned on the oil filter side.
The coolant may penetrate inside the lubrication circuit if an o-ring or the drive shaft gasket is not tight.
MAINTENANCE: The cooling circuit must be emptied through the drain holes on the radiator and pump before
removing the coolant pump.
Before removing the pump, the coolant chain gear must be blocked with respect to the timing chain cover using a
specific tool.
The balancing shaft chain and the timing chain housing do not need to be removed.
Cooling circuit components
Traccia Didattica Alfa 159-en-ridotta 68/318 © 2004 Fiat Auto S.p.A. - All rights reserved