Quote:
You might see if you can jamb a cheap HF NPT tap up there & get it to bite CCW into the piece
Actually this could make things worse 
I once broke off a steel stud in the upper aluminum crankcase of a Honda CL360 motor (dissimilar metals) I got the stud out and while cleaning the threads with a bottoming tap, broke the tap in the hole 
Taps are very hard and it took hours of delicate grinding to get it out. I then had to tap the hole larger and put in an insert. You don't have enough room in the hole to go oversize before you ruin the block
1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction
1998 Ram 2500 QuadCab, new daily driver.
2008 Honda Element
2014 Carry-On 7x14 Cargo Trailer
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