A while back I had repaired a stripped thread on my aluminium timing chain cover with a M6x1.0 Helicoil. This involved:
- drilling out the damaged thread
- tapping a slightly larger M8x1.0 internal thread
- screwing in the M6x1.0 Helicoil
Lately I noticed that the Helicoil had backed out. In an attempt to "fix" this I ended up damaging the new thread.
Short of replacing the timing cover itself, is it possible to recover from this mess I've made?