Oil leak behind the cam

Righty Tighty said
Thanks TMM, the visual helps me understand.





Now I don't want to beat a dead horse regarding the plugs, but is there any reason a shop would remove those to get the camshaft and cam bearings out? I'm just thinking that they're still there. The only plugs I used from the kit were the plugs I removed (aside from the cam plug, which is now installed). Does that make sense?
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Not that I can see. If they did the work you mentioned they shouldn't have removed any plugs. Like others have mentioned, after any machine work (no matter how good they cleaned it) clean it again. I use gun cleaning brushes, brake clean and compressed air to make sure all the oil passages were clean.