Thumping in intake and ticking in engine

[gtn116]

In the picture of what i assume is #8 head, it looks like part of one of the intake valves broke off? Is that me seeing goofy chit, or does it actually look like that?

Outside intake valve at 12o clock.

It's a small knick in the valve head, nothing broken off.

The material was magnetic, so who knows what it actually was before it got mashed. Valve recession on 6&8 crudely measured with a straight edge and feelers shows .016-.024 and head thickness measured at 3.744.

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[sideactiondiesel]

Seems someone dropped or lost a nut in there at one time and sent it on its way. They will live for a lil while until it wears enough to get wedged or fall in and then... Boom here we are.