Audi 80 – Engine damage at -17 degrees

Tomorrow! I’m not normally on the road here, but today I’m on a mission for a workmate. Today she called her 80’s Audi. According to her statement, the engine went out and a whole bunch of lights in the AI. So I’m going there. She had her bonnet already open. She said it burned. I’ve seen it in. Under the air filter on the engine the oil was standing. It’s estimated that also burned. I can’t imagine anything else (had seen it in the air filter on the engine). Now the assumption is in the room that the cooling water was frozen and that the whole thing came out of it. Is it possible? I am not really the technician now. Thank you very much for your assessments. Have telephoned with a friend who is actually quite fit, but such a remote diagnosis is really difficult, I know. LG