Aircraft type: Messerschmitt Bf 109 E-1, E-3, E-4
System affected: Water Cooling system
Description of the problem: In the real aircrafts, the Water Cooling system have overpressure valve, prevent of the overpressure causes damage on the system. If i dont open radiator in the game, the cooling system boils (it's ok), and damaged (it's not ok). The valves in the front-top positions. The pilot immediately notice if the steam burst out.
Description of proper operation: The coolant leaves the system only for the time while in an excess pressure. There is no permanent damage (except for the loss of coolant).
Sources: Bf 109 E Betriebs- und Rüstanleitung, pages 101, 102