Oil on intake manifold

Seal the bolts that hold the intake to the head. Either use teflon tape, or thread sealer on the bolts. Oil drips on the threads that protrude thru the openings by the valve springs and wick right back up the bolt to where it runs out from under the bolt head and pools up in the little valleys by the intake runners. If oil is also dripping onto the plugs and wires....you need valve cover gaskets too.