The coolant supply is regulated by a thermostat. When the engine is cold, the coolant circulates only in the engine block and the heater heat exchanger. As the coolant heats up, the thermostat opens and diverts the coolant flow to the radiator. The movement of the coolant is provided by a water pump driven by a V-belt. The coolant flows through the radiator from top to bottom and is cooled by the oncoming air flowing around the radiator fins.
An electric fan provides additional cooling. As soon as the temperature rises above +85°C, the thermal switch switches the fan on via a relay. When the temperature drops below +80°C, the electric fan switches off again.
The expansion tank serves as a coolant accumulator. It collects the coolant that expands during heating and returns it to the cooling circuit when the engine cools down. Coolant can only be added through the expansion tank.
Warning: The radiator fan may also switch on when the engine is not running and the ignition is off. This may happen repeatedly due to the formation of stagnant heat zones. Therefore, when working in the engine compartment with a hot engine, you can always expect the radiator fan to switch on suddenly. Therefore, if possible, always switch off the ignition when working in the engine compartment.
Cooling system capacity
- Engine 1.2 /1.3/1.5 l — 5.0
- Engine 1.6 l turbo - 5.0
- Engine 1.6 / 1.8 l 16-valve - 6.0 l
- Engine 1.8 l diesel - 6.0
(The original article was published on: «MITSUBISHIMAN.ru»)