- Joined
- Feb 13, 2012
- Messages
- 60
Seems like I run into a lot of stripped or damaged spark plug threads, especially with aluminum heads.
A few years ago, I was fed up with failed heli-coil and inserts, so I decided to make my own.
The tricky part is tapping the 3/4-16 thread to correct depth to allow a correct thread interference.
After accomplishing this, I apply a permanent high heat thread locker to insert and installed with a spark plug.
Been doing this for years with never a problem.
A few years ago, I was fed up with failed heli-coil and inserts, so I decided to make my own.
The tricky part is tapping the 3/4-16 thread to correct depth to allow a correct thread interference.
After accomplishing this, I apply a permanent high heat thread locker to insert and installed with a spark plug.
Been doing this for years with never a problem.