Jeepguy 43
Bigger Hammer
Over tightened pay attention to the surface near a retaped stud also make sure they are deep enough to properly seat.
Heli-coil fail
- Thread starter Jeepguy 43
- Start date
- Sep 20, 2017
- 3,905
- First Name
- Jeff
- Willys Model
- Wagon
- Pickup
- CJ
- Willys Year:
- 1955
- 1958
- 1962
Time for a Timecert 
Jeepguy 43
Bigger Hammer
Only supposed to hand tighten not with a wrench.
Mark W.
Precision Fit
I had to redo 3 manifold bolt holes. I made a drilling jig to center a bit over the bad holes then I drilled the holes out to allow a 9/16" fine thread tap to make new threads. I then took a 9/16" fine thread G8 bolt put it in the lathe and drilled and tapped it for a 3/8" fine thread. I squared off the end. Tgen using a bolt threaded into it with a perfectly flat washer I threaded the insert in place with a bunch of Red Loctite making sure it was perfectly flush to the block. A lot of work but the results are stronger then stock threads.
diggerG
Well Oiled
Helicoil fail? Not a surprise at all. You are screwing with headbolt threads. The right drilling, and the correct heat will easy out them out
diggerG.
diggerG.