Hello, I’m new here and greet all the forum members very warmly. My problem: Apparently pressure in the coolant system. When opening the balance tank lid to refill coolant, the cooling water in the tank rises quickly and beyond, despite ice-cold and unactivated engine. When the coolant level is set between min. + max level, the problem occurs immediately as soon as the engine is started. Here also faster continuous cooling water rise until the tank cover had to be closed again. When driving, splash after approx. 40 kilometers the coolant water can be heard out of the balance tank, after a red warning signal briefly lit up and motor problems indicated. The engine temperature showed approx. 80°C const., whereby once a peak was registered by 120°C. However, on the way back there were no problems. However, after that the balance tank was empty and had to be filled up again with 1 litre of liquid, it was probably the same time as the coolant volume. The cooling liquid was renewed again (between min. + max.) and the engine was almost opened for the purpose of cooling, the liquid rise had to be found again.