I'm trying to avoid splitting my case/removing my engine in order to remove an engine stud and R& R that stud which broke while traveling down the road.

The stud (drivers side stud, 2nd top from/toward driver) 1st broke about 1 inch from its end, 2nd brake while extracting at the engine's case - heli coil into case?

? : Are the factory engine stud "Heli coils" (threads into alum. case that hold stud into case) install/removed from the exterior side or interior side of the case?

This may be important as we try our next extraction - I'm not willing to remove engine and therefore it's "do or die" for this engine/perhaps my trusted old vanagon.

Pls. advise if you have knowledge of this .....

Have a good day!

Larry
Ga.