Quote Originally Posted by haruman View Post
Any thoughts on this? Good idea? Bad idea?
Thoughts: search around forums / google for "helicoil fail" (with or w/out quotes) and see what comes up, like comments here: http://www.practicalmachinist.com/vb/general-archive/helicoil-failure-90103/ for example.

Or Youtube vids for helicoil fail. Consider the source, if someone says "I've never seen a helicoil fail", eh means little if they've only been back in to a few places where helicoils were used in the same type of situation you're planning. Think old metal, hard vs. softer, moving parts, torque, stress, sheer, heat/cooling differences, etc.

Whatever reasons for failure where others have done it, well, there's your sign to not do it how they did Thinking find out "how to NOT do it" or "WHERE to NOT use helicoils" vs. "How to".

^ those are my thoughts. Don't know why not, would call helicoil if possible & ask. Even if they can't tell you, they'll ask you questions about the application you're planning & give you a different angle to think about maybe.