So I just noticed this happening. For some reason whenever I drive long distances, all the coolant out of my radiator and my turbo shoot over to my overflow tank, which in turn overflows out the top, and then the temperature gauge slowly starts to creep up. What could be causing this, I have filled up my radiator and turbo twice now. When I drive around town it does not seem to do it, only when the engine is really warmed up.... Could this be the thermostat. Doesn't really sound like a common symptom of a thermostat seized... but I could be wrong.
Thanks in advance!