We have all done it, overtightened a bolt and blown out the threads. When a bolt starts to tighten up and then go suddenly loose, you know that the threads are toast and now you have a problem.

Everybody who has worked on a car knows the pain and suffering of stripping or damaging threads. It can and will happen to anybody on a wrenching journey, and it often feels like a firm dead-end for ...

Spark plugs that haven't been changed for a long time can become one with the cylinder head. Fortunately, it's possible to repair damaged threads instead of scrapping the head. (Photograph by Chris ...

Few things disturb us more than the bewilderment of a broken bolt or seized pipe plug in a casting. You're at a loss for how to get the darned thing out. This is when you have to slow down and come up ...

Few things disturb us more than the bewilderment of a broken bolt or seized pipe plug in a casting. You're at a loss for how to get the darned thing out. This is when you have to slow down and come up ...

Few things disturb us more than the bewilderment of a broken bolt or seized pipe plug in a casting. You’re at a loss for how to get the darned thing out. This is when you have to slow down and come up ...