I had the top-end of my 96 Sportsman 400 bored, installed new piston, rings, and gaskets; now it sucks coolant into the piston! IT NEVER DID BEFORE! I've replaced the head gasket 3 times since, trying to fix the problem, does anyone have any suggestions?
you have a warped head! and if you used a black gasket its nots a heat treated gasket. use a red one they are heat treated