End Cap screw won't come out

[Weird Scenes]

One of the six socket head screws that secures the discs and end cap is just freely turning and will not come out. Is there a way to repair/replace the threaded part the screw is stuck in? ('82 CB900F Stainless 4 into 1 system) Most likely I will have to cut the head off of the screw so I can remove the discs/end cap to get at the problem area.

[bschultz]

Sounds like the tack welds, inside the core, let loose on the nut. The core assembley needs to be taken out of the muffler body and the nut (or a new nut) rewelded.

[Weird Scenes]

Thanks for the info!