Well I noticed that I had an oil leak around the valve cover. I pulled it off clean all the mating surfaces very well of the old silicon. I read that the copper gasket sealer can stuff worked pretty good, so I bought a can and now it leaks worse than before... I really don't wanna spend 30 bucks on a new gasket. So my question is this Is Silicon the best way to seal the valve cover or is there something else that works better?