Had a friend drop an ms461 cylinder to me with a stripped spark plug hole. I purchased a helicoil kit to fix...they had tried to fix it with one already, and most likely didn't set the coil hard enough to get it to stay, as it Blew back out....or drilled hole wrong size. Was hoping to be able to fix it for him, but threads are stripped too far out for helicoil threads to grab at all.
My question is, does the actual time sert get drilled out the same size, or larger than the helicoil?
My question is, does the actual time sert get drilled out the same size, or larger than the helicoil?