Originally Posted by lagdti
If the ceramic part breaks off,then it's a head off job to get it out!
The end of the plug expands and gets stuck in it's mounting hole,so as you undo the plug the tip breaks off........
lagdti Which bit of it is ceramic bit.
The one I'm looking at is used, but still kicking. The only bit that I can see that could possibly be ceramic is the electrode, but since this is only about half the diameter of the thread, I can't figure out how it gets stuck.