Coolant antifreeze

The cooling system must be filled year-round with a mixture of clean water and coolant antifreeze and corrosion inhibitor. This mixture prevents frost and corrosion damage and scale build-up, and it also raises the boiling point of the coolant. The pressure cap on the coolant expansion tank builds up an overpressure of 0.98 bar (diesel engine: 0.78 bar) within the cooling circuit when the engine is warm, which also contributes to raising the boiling point of the coolant. The higher boiling point of the coolant is required for the engine cooling to function properly. If the boiling point is too low, heat build-up can occur, which obstructs the cooling circuit and reduces engine cooling.

Because the radiator and heat exchanger are made of aluminium, only a suitable antifreeze and corrosion inhibitor may be used. Fiat specifies the coolant concentrate "Paraflu".

Caution: Coolants containing silicate, recognisable by their blue-green colour, and silicate-free coolants, recognisable by their red colour, are available on the market. These different antifreezes must under no circumstances be mixed, otherwise engine damage may occur.

The correct mixing ratio of coolant concentrate to water is 1:1. The antifreeze protection then extends down to at least -35 °C. The coolant concentrate should be mixed with clean, low-lime drinking water. For the total coolant capacity, see the engine table on page 13.

Caution: The proportion of coolant concentrate in the coolant must under no circumstances exceed 60 %, as this reduces the efficiency of the cooling system.