Good morning forum, I am recently proud owner of a Scania 142 year 1987 and would like to register this as a classic car. I am not a trained screwdriver, but I have no 2 left hands. Before I clear the points with the TÜV I am at the exchange of all liquids on the vehicle. Oils are changed except the rear axle and the servo all. Now I have a problem with the cooling liquid. I have (a large part?) dropped the cooling liquid at the deepest point of the system Now the liquid no longer circulates towards the engine. The cooler stays cold and the engine gets warm. I have the feeling that it has something to do with the thermostat and/or with the ventilation. Unfortunately, I did not find any precise instructions in the net, maybe someone can help me here? Thank you in advance Volkmarov