2006 Aveo - Plugs Covered with Oil!

[rrb6699]

ok, so decided to change my plug wires due to coil pack failure and every plug was completely covered with oil. the plugs seemed difficult to remove. I cleaned them up and the plug wire sleeves they sit in.
the plugs went in straight and we I made sure they were not cross-threaded. tightened them snug.

car runs fine. I also torqued down the valve cover gasket just a hair.

seems like the plugs jumped their sockets but can't be sure. if so, too much backpressure from exhaust ?

can't think of any other causes. am I close?

update. just thought about this. it's doubtful the plugs jumped thread. car did not smoke at all. but, when I removed and cleaned each plug, oil leaked into combustion area. the car smoked because of that when I started it.

that tells me oil leaked into plug sleeves but did not leak past plug threads. otherwise, car would have been smoking all along.