Originally Posted by
adam151082
thats a bloody strange one. take it your water levels ok? could it be you radiator is covered up some how so when the engine is under load and producing more heat its not gettin enough air flow to cool it?
the water level is fine. There is no blockage in front of the rad. I can drive it at low speed but high RPM and it stayes at the correct temp. It only seems to happen at a high speed - not effected by the engine RPM
It is strange indeed, wonder if the guage is faulty (the self test seems ok though)