No, at 500k, stick to a cultus or a coure. As for overheating, any mismaintained vehicle will over heat, I drove one of my cultuss for 190k km, from Lahore to kalam and another for 100k within isb and pindi over a period of twelve years, not a single indication of overheat. Cultus built quality fell after 2005-2006, I would always advice to look for a decent vehicle pre 2006, and live a trouble free life