In order for an engine to operate properly, its cooling system must operate in an adequate temperature range recommended by the factory to ensure that both the engine parts and oil viscosity are at the proper and recommended levels. Therefore, we will share some recommendations related to the engine cooling system:If the engine is operating at a temperature lower than recommended, the coolant will pass through the engine, but not through the radiator. When the operating temperature is reached, the refrigerant circulates through the radiator thanks to the thermostat.