HELP! Broken bolt/Heli Coil. - Team Camaro Tech
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post #1 of 3 (permalink) Old Sep 4th, 04, 01:53 PM Thread Starter
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I had a broken bolt in my intake manifold and after trying to extract it, I decided to use a heli coil to re-make the hole. I have another problem now. I started to drill the hole with a dull bit. The surface of the sheared bolt was not easy to drill in the center of with a dull bit. The hole I drilled is now to the left of where it should be and the opening of the hole is wider than it should be. What are my options now???



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post #2 of 3 (permalink) Old Sep 4th, 04, 03:40 PM
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I wish you guys would learn to stop and get some help, rather than totally screw things up Without seeing what you have done, its hard to say. You might be able to get the rest of the broken bolt out with a Dremel tool and a small bit, then there might still be enough room to put in a helicoil. Otherwise, you could get the hole welded up and drill and tap a completely new hole. There are also some solid inserts that are larger than a helicoil, but without looking at what you have done, its hard to say. Take the manifold down to your machine shop and see what they say.

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post #3 of 3 (permalink) Old Sep 5th, 04, 06:38 AM
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An insert that is two sizes larger than the orignal heli-coil but is still a heli-coil is called a twin-cert. Remember to intall a heli-coil (normal one)it uses and oversized hole so it is possible your still going to be ok. The solid type incert that you can use to fix your mistake is called a keen-cert. They are little harder to get in but once in will not back out as they are held in by stakes you drive between the incert and it's treads.

If you don't know what your doing STOP and get help. If you have an aluminum intake it might be an easy fix to have welded up and re-drilled and tapped. It might be even cheaper to go to the swapmeet for new to you one or purchase new anyway depending on the condition of the intake. Cast and original intake you might be spending some $$$$.


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