Spark plug thread repair - GIF

[Frank S]

Nah, if the machine isn't worth taking the motor apart to fix it properly then a quick vacuum with a small hose would probably be good enough for a ten dollar repair job.

If the engine is otherwise nearing end of life, then go for it if not, I sincerely hope you are joking. It will take longer to feed and twist a very small vacuum tube to vacuum out the cylinder then run a bore scope in to search for any you may have missed then try and vacuum out the rest to insure nothing has been left behind, than it would take to remove the head in the first place.

A $10.00 repair job is just that. Or better described as a new engine purchase in waiting.

If a guy is real careful with a powerful vacuum over the hole while drilling and tapping. possibly using a special adapter to fit over the hole that he can pass a drill bit or tap through he might get away without losing any chips down in the cylinder bore.

Ford came out with a special extraction tool to remove their stupidly designed new type sparkplugs when they went to coil overs. Dealerships wound up having to do a lot of cylinder head removals and even engine replacements due in part to lazy or poorly trained technicians not doing their jobs correctly or even if they did their job correctly, the tool just didn't work properly every time.