hey i have an ls vtec setup and after i put on my head i notice there was oil leaking in to my fourth spark plug(far right). now i have changed all the o rings and the valve cover gasket to OEM after i seen the problem occur. after i changed the o rings from months back i checked all my spark plugs and the same one is filling up with oil again. i dont know if i need a new valve cover or what. i would appreciate any advice giving. thank you