Hi everyone...this is my first post so be gentle with me. My problem is with my E36 1.6i saloon overheating. It only overheats in slow traffic or when stopped, when on the move it's fine. I have checked for leaks and found nothing obvious. I don't have any white smoke from the back and performance seems normal. Also the heater only blows warm air when on the move. There has been no work done on the cooling system during the last year, so I can't blame faulty workmanship. One last thing, I can turn the fan blades quite easily by hand...is this normal? Any tips would be appreciated.