Cooling System
- Cylinder block
- Right cylinder head
- Electric coolant pump
- Heat exchanger (passenger compartment)
- Preheating crankcase ventilation
- Throttle body
- Upper cooling hose
- Bypass pipe
- To cylinder head
- Radiator
- Oil cooler
- Lower cooling hose
- Thermostat housing
- Coolant pump
- Left cylinder head
- Expansion tank with level sensor
- Air bleed circuit
The engine is cooled used reversed cooling, that is, the cylinder head is cooled first. The system gives fast heating and contributes to reducing emissions.
The radiator is made of aluminum to withstand thermal fatigue as the radiator is alternately cooled with cold air and heated with hot coolant. The cooling system is regulated by a mechanical thermostat, which is located in the thermostat housing. The thermostat housing, in turn, is located on the inlet side of the coolant pump, between the radiator and the coolant pump.
The heart of the thermostat is a wax body which expands when energy, in the form of heat, is applied. A jiggle pin is located in the thermostat. Any air in the cooling system can be evacuated from the system using the jiggle pin.
Cold air is sucked through the cooler using an electric engine cooling fan installed on the fan shroud behind the radiator. The engine cooling fan is brushless and has six fixed stages. It is controlled by the engine control module (ECM).
Oil cooler
The oil cooler is round and has an inlet and outlet for oil as well as for coolant. The oil cooler is structured in layers, with alternating layers of coolant and oil flow. Because the oil cooler has very small slits, there is a large pressure drop here.