Your noise sounds like the same problem I had a while back. The bottom of the oil pan was pushed in enough along with no cork gasket (just silicon) that the crank shaft was hitting the pan just enough to make a noise. I'll try and post a link to my thread here:
https://www.stovebolt.com/ubbthreads/ubbthreads.php/topics/1079065/1.html Good luck!
