I had this problem a few years ago. You will have to replace the valve cover gasket. It is easy to do and the parts are pretty cheap. I also went ahead and changed the spark plug wires and the plugs them selves while I was at it. It took me about 45 minutes to do. I also bought a Chiltons guide so I knew what I was doing. The valve cover gasket is your problem though.
Answers & Comments
I had this problem a few years ago. You will have to replace the valve cover gasket. It is easy to do and the parts are pretty cheap. I also went ahead and changed the spark plug wires and the plugs them selves while I was at it. It took me about 45 minutes to do. I also bought a Chiltons guide so I knew what I was doing. The valve cover gasket is your problem though.