For such situations, the only way to go about is to make sufficient room for the drill and it might mean raising or lowering the engine, ie, with engine mounts removed. Worse case is either to lift engine either partially or fully out of vehicle.
If there is still a short piece of stud sticking out and hopefully the broken stud is not fused due to rust. You might still be able to remove it with a pointed punch and hammer.
Tap the stud to try to make it turn anticlockwise and if it can move, then continue until you get sufficient grip with a grip pliers to remove. When tapping, do not hit hard, just gentle taps to vibrate the stud to move.
Saturday, January 6th, 2018 AT 9:46 PM