I have never seen a spark plug break like that before. What kind of plug was it? I can't see from the picture if it is Bosch or Champion, or Auotlite or what. Anyway you are going to have a lot of trouble trying to remove it because of the "well" it is in. You would need a LONG drill or EZ-out or whatever you are going to try to do. My best advice would be to pull the head and take it to a machine shop. They can try drilling it out and if necessary put a thread insert in. Generally when you break something off in aluminum the threads are messed up anyway either from the part being seized in the first place or when you do remove it you wind up tearing the threads out. Always when installing spark plugs you should use anti-seize compound to prevent this from happening. Actually this is required on ANY steel fastener in aluminum. If you do pull the head you could do this yourself. Most large auto shops sell a spark plug rethreading kit. It comes with a drill bit, a tap, a couple of inserts and a tool to install it. They are not expensive and the only real important part is to have the drill perfectly aligned with the hole or the spark plug will be crooked. I don't think an ezout is going to be of any use. If it is loose enough to remove with an ezout it would have unscrewed and not broken. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, kKoncelik@xxxx wrote: > The fact that it broke like it did may indicate its rusted in place. > > I would plug the hole a bit to keep stuff from getting in.then soak the > threads if you can with WD40 for a while. > > They do make an easy out that will fit that size hole but you may have to go > to a specialty tool store to get one or find one on line. > > IF it doesn't you can have the hole resized close to the thread dimensions. > Sometimes the easy out then will work better since the thread is not as stiff > and has some give. > To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/