Have you checked your cooling system lately to make sure it is functioning properly? Check the coolant flow (make sure radiator is not clogged), fresh coolant, cleaned the radiator fins...etc. I have never had my VX overheat even when sitting in traffic (or crawling along on the trail) and I am in Tucson where the temps hover in the 108 range in the summer. I am not SC'd but that shouldn't make that big of a difference.