Reply To: Broken off screws advice

[Mumbles]

Here’s where a set of left hand drill bits can come in really handy. Quite often the drilling alone will unwind the broken bolt out of the hole, as long as it isn’t corroded in place. Depending on the size of the broken bolt, Easy Outs or other fluted style screw extractors can be used to remove it. Any drill bit used shouldn’t be much larger than the tap drill size for that particular thread so the threads in the block aren’t damaged. If those threads get damaged or drilled out, then a Heli Coil insert is the next step.