ah ok thats interesting to know, thank you. so as long as the ecu temp switch (yellow) is working correctly it should be fine. runs like a dream once started, its just nice to not have it cranking so long. will have the metering head checked over once we put it on the rollers to make sure its fuelling correctly etc, I intend to remove the metering head and give it a once over as ive noticed a little bit of moisture just bellow the unions which im presuming as the unions are not weeping ther must be a paper type gasket on the top of the head somewhere?