gwmc7e

I have an oil leak originating from the rear of my engine block. Haven't yet identified what specifically is leaking. Will install new valve cover gaskets together with spark plug gaskets and any other gaskets provided in kit. Since I can't physically view where the leak is coming, what's the likelihood I have something else leaking besides? And what? What ought I look for upon removing valve covers? I still don't know how far back I can see.