870 broken exhaust manifold bolt

[2dlb]

a little trick i have learned. we got pretty good at drilling and taping but lately i prefer to get a nice 90* 1/4" die grinder with a small carbide ball and bore down through the center of the broken bolt then change to a taper and clean out as much as u can with out touching the threads and then run a tap down through. or try a good left hand drill sometimes that bite at the bottom will screw the broken piece out. just my 2c