Starting and Running Problem...

So I started her up again today after perfect driving all night... and there it was again the ticking... so I opened up the valve cover and look what I found.....

This is the same one that was off the first time it happened. It is the #6 exhaust... the bolt that holds the rod keeps coming off... below is a pick of the bolt with messed up threading and the rod and bolt.

Could the threading in the rod be bad too??? Help me supermen!!!