>>>*Morning!

Margie had me wander over here, I will try to help.

With the common use of aluminum heads we now see sparkplug hang up as an almost weekly concern around the shop.

If the plug snapped at the base of the threads, then there are just two options. Since it should not hurt anything to drive it a short distance, (it will just miss) then taking it to a local shop is one option. They might attempt a removal by drilling it out, or they may choose to remove the head.

It all depends on access. Drilling one out while the head is on the car requires skill, I would take the head off myself.

If you decide to try to DIY, start with a small drill, about 11/32nds or so, even larger and be SURE of being on center and aligned. Then step out in drill size one step at a time. If a reverse drill set is handy, use them, often when you get close to the threads they will release and come right out. So we can see that drilling inwards can result in the piece of spark plug inside the cylinder and you are outside.

NEVER use an EZ-out on a stuck or jammed thread of any kind. Those are brittle, if they snap it's torch time.

The rule of thumb is this: If you can get the piece out with an EZ-out, you don't need one. Simply drill a pilot hole, select a suitable screwdriver, tap it in and remove the broken piece if the piece is sitting there loose.

If it's not loose, the EZ out will not work.

Now for you folks that will run into this problem in the future. When installing spark plugs, always use some thread lube like Never-Sieze or any high heat resistant lube.

Note motor oil usually can't handle the heat, although synthetic can. Ordinary oil can actually burn on the threads and create this problem.

Tip: When you DO run into the spark plug that refuses to come out, try this. Rotate it out until it stops. Then spray some penetrant, and tighten it back up. Repeat the process, you will notice that each time you will gain slightly until finally the plug will come. (Usually)..

Pulling harder once it comes to a stop doesn't work often, but working it in and out gradually clears the threads until out the plug comes.

From your description, I would say pull the cylinder head and take it to a good machine shop. Sometimes what seems to be the most work turns out to be the least...Good luck!....*EB