Good idea, Tod, I tried that but was not successful thus far. I also loaned a borescope from the zone, but it is a bit too large to get into the cylinder and you cannot see anything with that little mirror adapter. I've got the cylinder to TDC, fishing in there with a small magnet but am not pulling anything out. I also undone the exhaust pipe below the manifold and was able to get up to the valve with the scope - nothing... Tried a vacuum cleaner, at various places, too. I am pretty sure that the intake was closed when this happened, the exhaust was open. So it's got to be in the exhaust... I'll just take the manifolds off, tomorrow, and check some more. It is better than removing the head, at this point ๐ฅฒ