Are all IAC Housing interchangable meaning can you take one off a 52mm Throttlebody and put it on a 58mm Throttlebody??

 

Yes.

 

Ok, I got a question. What do you do if you snapped one of the little torx heads off the bolt when attempting to remove the IAC housing??

 

Take all the others out and remove the housing. You should have a stud left standing (hopefully). I'd heat the stud and attempt removal with vice grips. If not, you could probably get by without one of the torx screws. If you do get a vacuum leak, time to drill and tap some threads.

 

Thanks for the info..Also I did not break any screws..

 

That's a thought. After I broke the head off, I didn't attempt to remove any of the other screws. I just left it as it is. I haven't had a problem with a vacuum leak, that I know of. I didn't attempt removing any of the other screws for fear of breaking even more.

Where could I get replacement screws that small? Would I have to go through GM?

 

if you are still running the coolant through the TB, it may eventually leak into or out of the TB with a broken screw(i know mine did) It runs ok without the coolant lines hooked up.

 

Pick up the screws at any competent hardware store.

 

My screws snapped off to. What i did was pull the rest out...pryed the housing off carefull, took some vice grips and pulled the rest out but one that broke clean off. I just got all new gaskets cleaned it real well and put it back together with new a new screw kit from GM. I did the Coolent bypass so im hoping everything will be kewl. The Screw kit from GM comes with all the screws for the TB and cost about $24 with tax...same with the gaskets too...Good luck