Re: Trouble - broken manifold bolt.

Posted by DavidPackard On 2018/6/10 11:55:43

This link is a video on removing a broken bolt with the additional complication of a broken 'Easy-Out'.https://www.youtube.com/watch?v=W13kiM7bqyY

At the very end of the video is some advice on when to use an 'Easy-Out' and when you might just as well move on the next step. The advice is; if corrosion (rust in the case of an iron substrate) is the root cause of not being able to remove the original fastener then do not attempt to use an 'Easy-Out'. If the failure of the original fastener was gross over-torque then it's OK to try to extract with an 'Easy-Out'.

My personal experience supports this advice. I've had success with drilling the corroded fastener to just below the tap drill size and picking out the 'coil' of threads. In your case the 'coil' may be just a mess of rust. The exact of drill you use is related to how close to the center of the hole the drill bit is following. If you have a selection of 'left-handed' drill bits those may help, but I have never removed a corroded bolt with 'left-handed' drills. It's one of those 'it can't hurt' situations.

Dp