Originally Posted by Needforspeed3685
The re-threader will be the exact same size as the spark plug. It's supposed to be.
I think pictures will help this out a lot, if you can.
RIGHT! The helicoil insert is a bit bigger so wouldnt i have to "drill" a bigger hole , then insert the helicoil insert.
So, am i missing a drill bit? If so, i physically take a drill bit and smooth out the insulator. Then i rethread with the helicoil insert, correct?