Right i've recently had the engine out to fit a LOF clutch assy so whilst it was out i replace the thermostat again this time for a Gates one, the others have been a mixture of britpart and allmakes ones but its still doing it and the gauge still reads the same, so i'm now thinking its my electric fan over cooling it ( free wheeling ) but i will remove it completely to test it but obviously keep it with me just incase then decide what to do next as i'm not sure if you can buy a fan that doesn't free wheel