Re: Retrieving a Broken-off Sparkplug

Well, all cautionary info aside, if you have part of the threads of the spark 
plug still in the head, you need to get them out.  Hopefully, you can do it 
without having to drill a hole in the plug to get an easy out into it.  That 
would likely cause further contamination. (unless you use the shop vac 
outside the engine while you are drilling the hole.)

Best of luck.... planning and finness are called for.

John Carey