Did you try a thread chaser first? I just recently had a cross-threaded sparkplug,,, Had to take 3 "breathers" to remove, it was either that tight,,, or I'm getting old.

Well anyway, I ran a thread chaser through the SP hole and the new spark plug took it great. I even have had to remove the spark plug and reinstall it,,, seems it's good to go,,, now onto the other problems of the car,,,

On a side note, what size did you have to drill the SP hole to get the insert tap started?

__________________
Closing the store
Benzbonz.biz on your smart phone or tablet.