[Keith Tedford]

I've had good luck heating manifolds red hot to get the three exhaust studs out. Of course, these weren't valuable. It's the valuable stuff that cracks. Just don't quench the hot part when finished. We used to bury parts in lime to slow the cooling process. With bolts etc, that are rusted, bottomed out or seized, EZ outs usually aren't of much help and as often as not you see them broken off in the hole. Then you have a real mess on your hands. With patience, you can drill the nut out to tap drill size then fish the remaining thread from the nut out with a scriber or small pointed punch. In most cases, it is better to take the part to someone with the equipment and experience. In a desperate case and a valuable part, you can have the piece EDM'd out.