"I think it's getting loose...snap!" aka I think the bolt just twisted like a pretzel and snapped! Helped a buddy remove his broken crank bolt from a 2003 Cobra Mustang. Needed a way to guide a drill bit...and an excuse to machine something. Put the jig on the crank, tighten and use the hole to guide the drill bit right down the middle of the hole. Used a die grinder and stone to make a flat then a left handed drill bit pulled the bolt right out. My jig wasn't pretty (didn't need to be), but it worked!

Design

Finished tool

The engine block side

The not as pretty side with drill guide attached.

Problem solved

Clamping holes

It worked!