Adding radiator and thermostat to Polaris Ultra Touring.
Hey guys, I have been looking into possibly adding a radiator to my snowmobile. I have been looking around to see any info on snowmobiles with radiators and some of the newer models come with them straight out of the factory. some other threads I was viewing people say they don't like them because they add weight and get clogged easily in powder which I understand.. But here in South central MN I think having one would be very useful. Lately the early winters have been barely putting out snow... just enough for fan cooled sleds to get around but I would like to be able to have the luxury of riding and ice fishing with the ultra in low snow conditions. I don't believe this would be a very hard project to tackle but I just want to get some things straight.
1: Snowmobiles can be over cooled.. So adding the radiator not only would add extra cooling ability, but more coolant capacity which means longer warm up times and high risk of overcooling so the engine would cold seize. Now in order to solve this issue a thermostat would be needed, which I found out my sled does not have. Other 1997 Polaris models had them (XCR 600) so I am wondering if I could swap one of them into the cooling system. OR if aftermarket ones are made, I have heard some people talking about "in line" thermostats so I will have to look into that.
2: I would have to figure out where to mount the radiator.. I am thinking right above where the exhaust pipe connects to the engine and use those threads and nuts to mount it. I would have to also figure out what size radiator I would need to fit under there but also not be too small for lack of cooling.. I heard some people use ATV rads in sleds for dune riding but I see a cheap Polaris IQ rad on eBay I could probably get to work.
Anyone got any advice on the matter? thanks - jim.