Hey guys I own a 2002 polaris sportsman 500 that i bought used about a year ago and ive mostly been working on it and not riding a whole lot. Ever since ive had it i always noticed it didnt hold coolant and i suspected i might be in for a head gasket or water pump issue or both but the bike seemed to run fine, i had no external leaks and it never overheated. Just recently after putting it through some hard work i had coolant which has never even come past the minimum line on my overflow that was completely pressurized and shooting out the top of the overflow resevoir cap. I immediately stopped put it in my garage and started taking it apart as i figured it was the head gasket so i have the head out at a shop right now to be planed. I noticed when i took the head off a ton of coolant sitting outside of the cylinder walls. Im assuming this is normal in order to remove heat from the piston rings but im not terribly experienced and not sure. If you guys tell me there should not be coolant there i will be more confident that the head gasket was my problem for sure because i havent really noticed coolant in my oil or the exhaust putting out white smoke so im a little bit baffled. Is there a chance it could be a water pump issue? I havent noticed anything at the weep hole and i dont see how a leak or bad seal could cause it to completely pressurize. Im just not sure what would have caused the head gasket to go on me since ive never overheated this bike with a clogged rad or anything. Any insight from some experienced people would be awesome. Im scared to go ahead and put this all back together and have to rip it up because i should have done something different. Thanks a bunch.