I have a .16 vertex engine (I know its junk) but I'm trying to make it last. It's only had a gallon through it and for some reason oil keeps spraying out from underneath the cooling head where it meets the sleeve. I have tried tightening the bolts as much as I can and it still sprays out . When my engine heats up, i can tell there is oil underneath as white smoke trails from underneath the head. How can I fix this? Is there some way to seal it?