Originally Posted by warhwk

Second flight with a used (Ebay) Magnum two-stroke 91. Engine lost power then dead sticked. Back on the bench I noticed the glow plug was pointing a bit off-center. I took the glow plug off, but could not find any issue with it. When I tried to start the engine on the bench, the glow plug ignitor shot off with the glow plug still attached.
When I looked closer, the glow plug thread insert had come out of the head!!

I first thought it was a defective heli-coil repair, but I could see the insert is press fit into the head and is shaped like a Torx socket. It may have been spot welded as well.
I don't have anything to lose by trying JB weld, but I don't want anyone standing next to the engine when it is started.

Has anyone seen something similar?