Instructions for installing Heli-Coils are generally on their package, but here is a summary of how to do it.
- Drill out damaged threads with recommended drill size (for mounting flange use 21/64").
- Use Heli-Coil tap supplied with kit, to cut oversize threads for coil insert.
- Screw insert onto the mandrel, of provided tang, until driving tang is fully engaged in slot.
- With mandrel, screw insert into tapped hole until insert is 1/4 to 1/2 turn below top surface.
- Trim off excess wire.