How's the temperature gauge sitting? I've had 2 now that sat about 1/4 even when driving for a while. The original thermostat was seized open, but fitting a second thermostat in the top radiator hose solved the problem. Have a look at the video by Andyb2000. http://www.chryslerforum.co.uk/topic/1425-25-crd-thermostat-sealed-unit-or-not/