How to remove a broken bolt from an engine block?
How to remove a broken bolt from an engine block? Step 1 Punch the center of the broken bolt with a hardened steel centering punch and a hammer. Drill into the bolt using a metal-cutting drill bit, approximately 1/8th of an inch or smaller. Measure the width of the bolt threads and buy an appropriately sized bolt remover at your local hardware store. How to repair pulled out or stripped head bolt threads in? With the increase in the use of aluminum in engine blocks, there has been a significant increase in head bolt threads being pulled or stripped out....