Yo guys, I need to change the IAC on my 88 TPI IROC. There is no room to get a wrench on the thing. What is they best way to go about the physical removal of the old one and to snug-up the new one once it is screwed back in? Without damaging the new one. Is there a secret tool or trick? Thanks.

 

Not a bad job at all, only annoying thing is that tiny coolant hose attached to TB and a little mess of coolant when removing. Disconnect all electrical connectors for sensors on TB (TPS, IAC), vacuum hoses (look all over the TB and you will see them, one is kinda hidden below), carefully remove the clips that hold throttle/tv cables to TB, remove the 4 10mm bolts holding the TB to plenum, remove clamp that secures coolant hose to intake or TB and it should come right out. Once its out find the right wrench to break it loose and it will come right out. I would also recommend doing the TB bypass while your at it, by doing that it will keep your TB cooler while driving and really make it much easier to remove for future cleanings or repairs. I would also do a good deep clean on it while its out, really helped my GTA.

First time I did this I removed the IAC without removing TB, took awhile and beat the part up a lot, it was also hard to tighten the new one up. Had to use a huge crescent wrench. I would just do it right, might even be faster and no risk of breaking everything.

 

I got a socket at harbor freight and turned down the end on my lathe to clear whatever was in the way. Has to be a thin wall. Could do it with a bench grinder on an extension chucked in a drill.

GD

 

https://www.ebay.com/itm/OTC-7226-ID...QAAOxy9X5TZZ6y

 

Already did the coolant bypass.

 

I use plumbing sockets like these:
Shower Valve Socket Wrench Set (harborfreight.com)
They are sheet metal sockets, so very thin. I had a set in my tool box already. If you stack them with a smaller one inside the one for the IAC hex, you can put a regular 1/2 drive socket on it for your torque wrench. It still takes a little finesse, but it works.