Aluminum valve cover absolutely whooped my butt today. Took off the intake and valve cover to put a new gasket on and had a massive leak on the back passenger side. Took everything back apart, reseated the gasket and used rtv, three bolts would not grab. Rough day.
I think I know where I went wrong, there are two nuts that go on studs for the valve cover and I think I needed to tighten them down before I tried to thread in the rest of the bolts. Got to the job at 12 today and just now got out of the shower.