Tach colleagues, maybe you have an idea: Drive a 91 MX-5, which is eventually terribly overheated. Workshop tapped on cooler lids, because the cooler was empty and the collection tank was full. Ok, swap was the easiest exercise. Now, however, the engine was increasingly bluish, so the suspicion arose that the engine had just noticed one. From a reliable source I got a new old engine (including water pump) and had it installed. The subsequent joy was 10 Then maybe the thermostat! Mazda delivered promptly and the part was replaced. 5 km everything went well, then again the same problem. An expert typed on a clogged cooler. So cooler rinsed until the water was clear, filled up and 30 min. ventilated with stationary gas. Then 5 km drove and the temperature indicator marched straight to the right again. Now also the expert scratched his head. After ventilated, 5 km drove and… you guessed e The fan motor starts reliably and I think that everything has changed now except for the cooler. But if it was tight, the engine would also have to get hot when venting. Or do I make a mistake of thinking? Thanks already for your ideas!