I have the 2.2 engine in my Zed and although it heats up quicker than most cars I've had in the past the temp gauge always sits bang in the middle suggesting all is well. However I've noticed that even after a long run the rad is stone cold apart from the top couple of inches. Is this normal? I would expect the entire set of gills on the rad to feel hot to the touch. :-\ Cheers, Deano.