Any ideas? It is about an 1/8th inch long, and 1/16th tall. Some kind of gear tooth, but I think it is too big to think cam. Top and end edge have some kind of etching lines on them, the two sides are smooth like they have mated. Is this coming from my gears? If so, do I have to remove the engine and crack the case? What happens if I don't? Thanks. Here is another view. Thanks for any ideas.