can anyone tell me wwhich way the thermostat should go in?? and also i had the head skimmed and a new gasket on a couple of weeks ago but the temprature guage keeps getting to three quarters, sometimes it will stay on half for a short time. if i do 80 or 90 on the m-way it will drop down to a quarterbut as soon as i drop the speed down to about 50 - 60 it soon gets back up. i have checked the header tank its not pressurising and its not loosing water could there be a fault elsewhere??? thanks for any suggestions.