Oil quart foil seal accidentally poured in during routine change

[Topless]

Yep, I did that once. I drained the oil through a screen (no joy) then dropped the pan and there it was, stuck to the bottom of the pan. Crisis averted!

[BYprodriver]

Directly below the oil filler hole in the case lies the crankshaft housing, adjacent to cylinder #1. With all the oil that's been poured in, I believe the foil has fallen into the crankshaft housing. I would drain the oil, in a clean container if you want to reuse it. Remove the oil sump plate & look for the foil, if you don't find it rotate the engine Clockwise& keep looking for the foil. At this point it's either completely disassemble the engine or allow the engine to chew it up & spit it out. If the foil drops in the sump whole it "could" cover 90% of the oil pickup tube!