2002 700 twin

Been having a lot of water in the oil so I pulled the head off and can not tell if it was the head gasket. Any other place where water can come from ? Visually the head looks fine, ( The head does have a some sort of clacking from the valves when the motor heats up.. thinking about that I probably have some water in the lifters causing that sound.. ) cylinders walls look good. Just not sure if it is head gasket..