I've heard of putting a small amount of JB Weld on the outside of the helicoil before installation in places like that where theres fluid behind the threads. To tip the odds in favor of no seepage. Then tap or thread chaser after its hardened. In this case, the plug gasket should stop anything that gets past, and theres no pressure on the fluid. Just thought I'd toss that in, has nothing to do with holding the threaded insert in place. I did the carb mount holes in my V8 intake way back when, and yep the coils are to be trimmed to length. Dremel beats wire cutters for that! Snapping off just the tang is what to do when you can use the whole thing.
Originally Posted by idrivejunk
