Hello everyone! I turn in my distress to everything knowing and ignorant, looking for the solution. Because I’ve been having a problem for quite some time. But first to my car: Audi 80 Coupe Quattro Bj. 92 NG (exchange block series 85) with gas conversion And now the problem: I don’t get the Audi cold, and the fan only runs when it’s getting warm. So at least my researches. What was done so far: – Cooling system flushed. – Thermostat changed – 3Poli the switch for the fan changed – thermo sensor changed What has not yet been done: – oil changed – cooler changed (due to the ridiculously high cost) So that it is the head seal I doubt quite simply, because the cooling water is absolutely oil-free and the oil also does not show any starting point of foam formation. In addition, the pressure indicator shows no worrying values during the ride…. the temperature display ensures this. So during the operation on the Autob The cooling temperature is usually between 90°C – 100°C and the oil temperature is so close to 130°C. My question would be now too. Would “wasted” oil provide an increased temperature? And what else could you recommend to me what I could look/check. Thank you for your help! Small note to the end: For all those who think the temperatures are in the green area: No they are not!