Any idea what this could be? It’s either some form of a washer or maybe a stripped out thread from the oil return line. It’s 13mm OD. It was round and broke in half when I tried to remove it. Appears to be aluminum (not magnetic). Appears to be round (like a washer) and not spiraled (like a thread). Pettty soft so it’s hard to tell.
I have to go with the assumption it’s remnant’s from the drain plug helicoil in the corner. Glad I found It. Doing some general Maint on a S54 swap engine.
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