Stripped Head Bolt


Dawg 89
No but I've done intake and exhaust . Simple job .


Premium User
I have twice that I remember in 15 plus years. The first time I did it I was a little skeptical but never had an issue as long as I owned the engine (3-4 racing seasons). The second time, well that engine is still roaring the streets on a mini bike.
We have done it many times. Good luck if it's @ the #7 head bolt though -- you'll lose head gaskets there even more than normal.
Stacking heli-coils can be a real chore keeping them in time too, but it's important to do that so that the cylinder is distorted & supported similarly to the other good bolt thread holes.

🏁Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Cutz
Carlson Motorsports on Facebook
32 years of service to the karting industry ~ 1Cor 9:24
Linden, IN


I've made my own thread inserts on the lathe. Used Devcon as a sealer. Fel-Pro makes an aluminum epoxy that works great also. Never had a problem with them, even on modifieds.


old member
thinwall thread inserts are a much better option. honestly, I hate helicoils but that's just me