Broken spark plug...
I consider myself pretty handy, but I have a real winner that is givin me a fit.
I was going to do a routine spark plug/wire change...simple, 30 minute deal....until one of them snaps off, leaving only a hollow thread and electrode firmly in the head....
Its aluminum, so heating is out. And EZ out won't budge it and the last thing I need is to break one of those toughies off in there.
I know the optimal solution is to remove the head, go have it remachined...blah blah blah, but we are talking a 97 s-10 with almost 200,000 miles on it that already needs several hundred dollars worth of repairs on non-mechanical stuff so spending more than its worth isn't an option.
I have decided to HeliCoil it. What size drill bit should I use to remove the remaining plug and the old threads, so I can retap this thing? The spark plug thread is 14mm, so I assume I need to go just a tad bigger to tap and insert my helicoil, yes?
Any help is greatly appreciated!