How the cooling system works

With the engine running, the water pump continuously circulates coolant through the numerous coolant passages in the engine and removes the heat generated in the cylinders during combustion.

The water pump on the 4-cylinder engine is driven by a V-belt, on the 5-cylinder engine by a toothed belt, and on the 6-cylinder engine by a poly-V belt.

The coolant flow path depends on the coolant temperature at the given time:

If the engine has not yet reached operating temperature, the coolant flows through the small circuit, passing through the engine and the heat exchanger. The intake manifold is additionally connected to the small coolant circuit.

At a temperature of approximately 87°C, the thermostat opens the large circuit, which includes the radiator. If the coolant temperature rises further, so that the temperature in the radiator exceeds 92°C, the radiator fan switches on to assist cooling.