I was changing oil at 1850 hours a few days ago, and removed the sump oil intake screen to clean it.
I had only removed it once before on the initial cleaning/reassembly.
On inspection, there appeared to be something INSIDE the screen that would not wash out.
The foreign object could move from one end of the screen to the other and was nearly the ID of the screen.
When shaken, it moved from mid-screen to the threaded end, made of steel (not brass) in this listeroid. I had to use a rod to dislodge it from the threaded end, pushing it back into the screen.
The object was larger in diameter than the threaded end, so could not be removed. Whatever it was, how did it get in there?
I cut the end off the screen to get this thing out and discovered it was a magnet, cylindrical and with tapered rounded ends and shaped like a large very smooth rat turd. I suppose it seemed like a good idea to the manufacturers, but it could very easily migrate to the threaded end of the screen assy and effectively shut off oil flow. Sure glad it did not! With the magnet/oil shut off valve removed, I re-closed and re-installed the intake screen thinking I had dodged a very large bullet!
I had early on put a couple of magnets in the sump, so this OEM one now sits on my shop window sill as a reminder that with a listeroid, ANYTHING is possible!
Cheers
Hugh