Is this a stainless stud screwed into aluminum
? If so you need to heat the aluminum
, not the stainless. Heating
the aluminum will enlarge the hole, good. Heating
the stud will enlarge the stud, bad.
Another way to go about it is to hit the stud with CRC Freeze-Off. This should chill the stud and make it shrink. I've never tried Freeze Off. If you try it, let us know how it works.
When you put the new stud in, coat the threads with Permatex Three. It will prevent it from happening again. I learned that trick when I hung out in an outboard shop as a teenager.