[s-cars] Loose spark plug disaster

[colin gans]

Yes, it happened.

Last week while my wife was driving our 93 S4 the plug from #5 cylinder
completely unthreaded destroying the spark plug boot and damaging the
threads in the cylinder head to the point where a new plug can find no
purchase.

Any BTDT? Can the cylinder head be tapped (?) so that a new plug will be
secure?

Thanks,

Colin Gans