I just stripped the threads on one of the mounting bolt inserts while attaching the rocker cover to the heads of my 94 EX VTEC engine. Has anyone had to install a helicoil insert and what size do I need? Is that something AutoZone will carry?

 

I've used them in similar places. Carefully check out the hole before you drill it out. Make sure there's enough material surrounding the hole, so the action of enlarging it doesn't remove too much metal.

AutoZone probably; if not, call around. There's also a competing product called 'TimeSert'.