Hi All Coming down the motorway this afternoon my gauge went to three quarters I was doing just short of 70 in top gear. When I stopped I checked the water level, nothing wrong. I have only had this vehicle about 3 months and in that time it has always been very slow to warm up, I haven't checked but suspect the thermostat has been removed. The other thing is the heater never seems to get hot like in all other vehicles I have owned. Thoughts are head gasget. impeller on water pump, maybe radiator fans not kicking in, thermostat or any combination. What is the best way of narrowing this down. Your thoughts gentlemen & ladies. Many thanks Bob Hill