cheap bronco
Full Access Member
Well I have outdone myself this time, first time breaking a tap in a hole. I figured i would chase the threads and clean them up before assembly of the heads and now Im screwed. I have tapped many holes in the past from 1/8" to huge ones, and never a issue, it has to happen on a diesel engine block. The tap broke in a cylinder bolt hole. I have drilled through it with a carbide bit and tried to use a easy out, but broke the easy out also, had to start all over. I got to the part where now I have a hole drilled in the middle of the Tap and what now. I have tried to use a 50/50 mixture of acetone and ATF, no go. I also tried using heat the best I could with a acytelene torch, no go. I also tried taking a can of freon and holding it in the hole hoping it would shrink the tap a bit, no go. Aside from taking it to a place with a EDM machine, lack of funds for that, I need serious help.