Hi all.I

Did you check if your aircraft actually has radiators? In the aircraf.cfg the piston_engine->cooling_type=1 entry has to be set. Then (A:Recip eng1 radiator temperature,celsius) works.Arne Bartels

Thanks for your answer, Arne, now it

I'm not a pilot but I think it's normal, a bit of pressurization and additives and the boiling point is shifted somewhere above 100