Ive read, seen and heard of guys being skidish about Helicoils so here we go on the ins and outs of thier wonderful use. If youve got a stripped or pulled threaded hole this is the key of getting it back together without having to replace the said part. Just simply go and buy you a Helicoil or Powercoil kit and get it fixed. Just simply drill out the damaged threads with the supplied/recommended size drill bit.
After you clean al of the chips out of the hole and clean it out with brakeclean take the tap that came in the kit to cut the threads for the Helicoil, be sure to use Tapmagic or some other tapping fluid(even some WD40 will work) to make cleaner cut threads unless your tapping cast iron then do it dry:
Once you tap the hole all the way to the bottom clean the chips out again with some brakeclean:
Take your Helicoil install tool and an insert and follow the instructions of how to install it.
Once you start to thread the insert into the hole take light pressure to guide it into the threads and twist it into position all the way flush with the top of the hole:
Once its all the way in make another half turn to drop the insert just below the surface:
Now, be sure to take the tool or a screwdriver to break the tab off the bottom of the insert and remove the broke off tab.
Your done. BTW, if you are repairing a sparkplug hole or something you dont want a chance for the tab to fall into just use some needlenose pliers.