Originally Posted by JimVonBaden
Some thing the heli-coil will beck out with the screw, but experience tells this is simply not the case.
The only time I saw this happen was with a stainless screw in a stainless helicoil without any lubricant, a condition the Helicoil documentation will tell you to avoid.
The screw galled and welded itself to the helicoil. This would not have happened had the screw been lubed.