glad you found the problem,just saw the thread and was gonna say,last time i heard a boiling noise coming from my shee i ended up needing a fresh topend. my impeller snapped som fins and wasnt pumping very well,it would still circulate some but it would get really hot when i was just putting around or going slow through tight trails. been running engine ice ever since. bought it at the track from the manufacture booth,guy gave me a hell of a deal on a gallon and a shitload of stickers.claimed in the event of another failure it would keep it kool even with no flow? im not going to call him a lier,but i aint gonna try to prove him wrong either.