printable version

Engine cooling system

General information and precautions

Driving the engine cooling system

Engine cooling system works by the following algorithm. While the engine is cold, coolant (coolant) is pumped continuously working water pump only in the head and the cylinder block, as well as the interior heater in the heat exchanger. When the coolant temperature rises to a certain level the thermostat opens the large cooling circuit and the coolant circulates through the radiator in addition, cooling air passing through it. When the coolant temperature reaches a still higher value includes an electric cooling fan, which creates an additional air flow through the fins for more intensive dissipation of heat from it. The water pump is driven by a belt from the crankshaft.

Before working in the engine compartment, especially in the area of the radiator fan, be sure to disconnect the negative battery cable and connector wiring fan since He may start due to the effect of thermal conductivity even when the ignition is switched off.

Do not open the coolant expansion tank or radiator to full cooling of the engine in order to prevent scalding or steam.

If necessary, open the expansion tank cap when the engine is hot, wrap it with a cloth. Remove the lid slowly, gradually reducing the vapor pressure.

Description of test and adjust the level of coolant, replace the coolant, as well as some of the checks of the cooling system is given in Section Check of levels of liquids, the control of leaks, check and replacement of hoses and tubes in the engine compartment, localization of leaks and the replacement of coolant.