i suggest getting a temp gauge.I know you can tell by water but i think its worth the money for the cost of a new engine is high.First make sure your stock settings are correct some people post from flush some post out from tight.I had this problem reason im stating this.I also bought a nova head for my genesis to add power. www.rushrc.com has all the genesis stuff i need.Let us know what ya find out.THanks for all the posts.