Wed, May 2, 2007, 1:50pm (EDT-3) firstname.lastname@example.org (tom) doth sayeth:
If there's enough "meat" left in the cast iron, you could drill out to
the next larger bolt, then tap new threads. Another possibility might be
Helicoil inserts, rather expensive, available at your local auto parts
Helicoil, I couldn't remember the name. I think they're available
at real hardware stoers too. Should be able to get them on-line.
Might even be able to just tap new threads without drilling first,
Might be able to weld it, drill a hole, and tap new threads. But
for something that you're talking a professional doing the work and
expensive. I'd save this option for last.
Or, maybe you could just buy a new, or used, part.
What is life without challenge and a constant stream of new
- Peter Egan