One final note seems appropriate: If you drop the screen plate, and I would recommend doing so at least once, just to see. How many miles on the engine??. New gaskets, of course. Lots of VW parts suppliers on the web. Autozone and Advance Auto, NAPA, et al. may be able to supply also. I use some red silicone on these (as well as other gaskets and such where I want the oil to stay on the inside). The admonition to just go snug on all those little nuts that hold the plate in place is very good advice. Stripping out the studs in that aluminum case will ruin your day, and several more to follow. You will have to learn all about Helicoils.