Stud replacement during timing belt job?

[Mikey_ZX]

I was able to remove the tensioner and upper pulley studs with no problem at all. However, when I tried removing the lower pulley stud I was able to turn it a few times until the stud froze and broke on me. This was one of the hardest bolts to remove from my block, I basically tried using an easy-out, and the only thing that worked was drilling to the point where only half of the diameter of the stud was left and using a long screwdriver to smack it loose. So, in the process of removing my broken stud I smoothened out a few of the bottom threads in the hole, I've inserted the new stud and it wiggles as it sets, however I haven't inserted the stud fully. I am asking what is the strongest application I can use to keep this stud still and free from wiggles??? Any suggestions will be appreciated!!!

[robomatic12]

I would show it to a machine shop and have them give you their opinion. Perhaps a heli-coil.

[es.biggs]

You could get it heli-coiled (which should work fine) or you could just tighten the stud down and hope for the best. It's your call man, honestly I don't think a thread or two will hurt it BUT if it does fail, you know what happens. I'd probably go to a machine shop and see if anybody is interested in a side job to come take a look and maybe heli-coil it for you

[robomatic12]

I was reading a thread on twinturbo.net about a better option to heli coils which is a keensert, I don't know much about them but it is another option at a machine shop to effectively repair the threads.