Well I drilled into the bolt about 7/16 or so - around 5 tries - and the bit did the work.
To be fair; part of an EZ out was used, but it was turned by hand.
A piece of gum & a stick most likely would have taken the bolt out all the way.
Note: Hole was filled with WD-40 the night before.


John

Just wanted to share a possible solution for anyone with a broken head bolt. My mechanic wanted to pull the engine, (or scrap the car) after breaking one of my head bolts aprox. 2 inches below the head. I went down to his shop, took measurements & machined a tool for deep extraction. 10 minutes ...