The spark plug may be especially exciting to drill for an easy-out, since
it's filled with a ceramic core and won't drill, but seems to me that when
I took one apart a long time ago (to make a leakdown tester), the ceramic
center insulator just lifted out once I ground off the upper part of the
body, so maybe you can actually pull the core out (if it isn't already out)
and then  try heating it with a torch (exciting...) or saw a slot from the
inside (use a slimmed down hacksaw blade) to loosen it, prior to using an
an easyout.   (since it was tight enough to break off in the first place ,
you really need to loosen it up somehow first).   The two kinds of stud
removers I've seen are the easy-out type, which has a fast spiral reverse
thread, and one that just has tapered, non-spiral sides which you tap in.
I think the easy-out type works better.   You can get pretty big easy-outs.

Dave

At 10:06 PM 7/20/98 -0400, Gary Edwards wrote:
>Ah! Brilliant deduction, Sherlock. Easy out is precisely what I meant and the
>toughest job I've ever used them on was a manifold cover bolt. The sparkplug
>would indeed pose more serious consequences.
>