Wednesday, June 24, 2009

How to Repair Stripped Bolt Hole Threads

Angie's List!

Not many things frustrate me more than bolt hole threads when they strip out. I don't think anyone would be in disagreement with me that it always happens at exactly the wrong time. Who wants to spend an hour and a half searching for a tap and die set and then digging up a bigger bolt?

But there is good news! There is a cheap and easy DIY fix! I don't recommend doing this on your engine block, for obvious reasons, but it will work wonderfully in a number of light duty situations.

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And further good news; it doesn't require any expensive new tools either. The initial thing you'll need to do is back out the bolt. This should be easy; it's already stripped, right? You might have to use vice grips on the head and pull while turning it counter-clockwise.

Next, fill the bolt hole with a compound, either Liquid Steel or J.B. Weld. This stuff has the advantages of wood glue and finishes like metal. You've got to love the folks that invented those products!

They're so good they don't even need to hire Billy Mayes to hawk them on TV. Next, coat the bolt (preferably a new one) liberally with liquid soap, including the head.

Run the bolt back into the hole and wipe up the excess that squeezes out around the bolt head. Do this gently; remember that you're making new threads.

When the compound is dried, you're set! You can now screw or unscrew at will.

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jessica said...

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Unknown said...

I appreciate the post. While hanging my LCD screen, I discovered one of the four back mounts is stripped, and I felt really screwed. I'm hopeful this will be successful remedy.