I'm still having problems with the overheating! I was driving this morning when I noticed the temperature gauge go past halfway and then the heater went cold which pointed to an air lock. When I got home and let it cool I took the radiator cap off and noticed that some coolant had been lost. I know that the radiator is definitely not leaking. (it was brand new!) This also goes to show that it should've been checked weekly! I've topped it up and it seems all right now. I haven't checked the coolant level since I fitted the radiator 4 weeks ago. I'm bidding for another Acclaim on eBay at the moment. This one is a real beauty, is more or less rust free and has been very well looked after. Well worth buying (if I win the auction!