I picked up a Kodiak 400, Lots of power, but, it is overheating and there oil getting into the water. I found the fan motor was froze up. I can handle that. The oil in the water, is what I need some tips on. Head Gasket? Will stop leak seal a head gasket? Is there a possibility, that if I fix the heating issue, the oil will quit getting in the oil? Thought the heat causing expansion of the head, may be causing it. Thanks!