I screwed this coil in a bit too far (but will still work). The coil is suppose to be just under flush with your gasket surface.

5) now we use the provided punch to break off that coil tab you see. It just takes a light tap on the punch to break off the tab.

Now your done, and can use the stock screw. This thread is actually stronger than the original thread. In a aero space shop I worked at (twice), all aluminum threads were heli-coiled. This sure beats buying a new cylinder.



Doug @ ESP