i have oil leaking from a part on the side of the valve cover(99 metro lsi 4 cyl.), i have no idea what the name for it is, so i have included the pictures beow:

here is the general area the leak is coming from. i pointed to the gasket because i will need to replace it and i don't know what the name of the part would be called that the gasket is affixed to, i would just like to know when i go to the dealer. the leak is not coming from the gasket, i don't think, but from the part i have cicled in the next picture

here is where i think the leak is coming from. what is the name of this part and what should i use to seal it up so it doesnt leak?