Before 4 weeks my Audi started running to 100 degrees and did not cool any more.We changed the thermoswitch on it, then it started again, within 1 km again to 100 degrees. A sniffing test was done, exhaust gases in the water.Then the head seal, wapu and thermostat was renewed. As soon as it came to 90 degrees, the cooling water gushed out above, again tested, again exhaust gases in the water.Sudden cylinder heads have hair cracks. Which worried, today built together. And again, M otor hot,fans don’t turn,heating is cold,cooler is warm and any amount of air has been ventilated despite. I don’t know any more, you can help me. Thanks in advance Colli