Dampner Problem

Not quite sure how it stripped out on you if it was already tight but they do sell a crank thread repair kit, you clean it out real good then use this mix they give you and thread the bolt it, it fills in the grooves and makes new threads.

I have no expierence with it but have heard it does work...

FWIW...Pulling the spark plugs out helps relive the cylinder pressure, and always make sure the car is out of gear.