i just bought a eclipse gst 2nd gen. It needs a new valve cover gasket. I bought the gasket today from mitsu. I am removing the valve cover but it is stuck on. I have removed all the bolts the ones in the middle and the ones on the outside also. However it won't budge i have tapped on it with a deadblow hammer but it won't move at all. Is there some kinda trick to taking it off or something i'm forgetting? any help is appreciated i am getting fustrated