It is 9 Nm for the valve cover and 8 Nm for the coils. WIS does not show a tightening sequence. At the dealer most people just use 1/4" air ratchets to tighten down the valve covers, I have yet to see a valve cover break. Are you going to re-seal the chamber on top of the valve cover while you have it off? That is usually the source of the leak and not the bottom gasket.