After cleaning any metal out of the hole and ensuring no oil has contaminated the new threads, it’s time to prep the Heli Coil insert. We like a little Loctite for added insurance.
Using the supplied tool, thread the insert until it is just below the finished surface.
Make sure to let the Loctite have some time to cure. On the bottom of the threaded insert is a “tab” that can either be broken off and retrieved, or left as is. On blind holes, we normally just leave the tab in place, as it can be a real PITA to break it off and retrieve it without causing more damage. On through holes like this one, a punch and hammer are the weapons of choice.
Here is our mangled bellhousing after the repair was made. In all likelihood, the repaired stainless steel thread will be stronger then the original aluminum ones ever were.