Hi all, new to the forum. i recently bought a 1998 polaris sportsman 500. the head gasket was gone, i had the head and cylinder resurfaced by a machine shop as the cylinder head was warped. i bought new base gasket and cylinder gasket. the camshaft turned freely and moved sided to side prior to disassembly. i have the polaris shop manual, and followed the assembly instructions as stated exactly. i left the cam and rocker assembly assembled on the head before installation. after reassembly the cam was bar tight, woud not rotate nor move side to side. called a friend who ownns an atv/motorcycle repair business and he had never heard of this before. so i untorqued the head bolts in stages as it says to do, and after the 1st 180 degree loosening turn the cam would free up again…..im at a loss… cant figure it out, so i started over from beginning nd followed torquing procedure again, and sure enough cam bound up again… has anyone ever encountered this before? i checked both head and cylinder surfaces with straight edge and feelers and both are perfectly flat, i cant even find this issue on google anywhere lol.. please help
thanks in advance