Hi, I found a small, almost cylindrical thing, laying by the inner spark plug of the right cylinder, I'm trying to figure out what it is.
Its diameter is about 14mm (0.55in) although its not a normal circle, and is 4mm(0.16in) thick. Its hard plastic or metal, its dark grey probably due to the heat, light grey on one side, as if it was painted.
My main concern is if its something that dropped from inside the head cover.
Any ideas?