Originally Posted by poleposition
The reason why I replaced the waterpump and thermostat is because the engine was overheating. Now that everything has been replaced, it still is doing the same. The temp needle will slowly rise like normal, but it keeps going past the half way mark all the way into the red zone. The radiator, waterpump and thermostat is new. I checked both hoses from the radiator, one was hot initially. Then after a few minutes the other got hot too, which means the thermostat opened right? There is no heat through the heater, just cold air. Could it be because of improper bleeding? heater valve? or a sensor?
Same symptoms happened to me with my m20. Was due to air trapped in the system due to improper bleeding