helicoil question

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Mar 4, 2005 | 04:07 PM

rocmemphis

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Joined: Nov 2000

Posts: 374

From: Memphis, TN, US

helicoil question

I messed up a header bolt hole bad enough to where a 3/8 helicoil will not fit. Has anyone tried and successfully installed a 7/16 helicoil for a header bolt hole?

Mar 4, 2005 | 10:10 PM

shoebox

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Joined: Dec 1969

Posts: 27,728

From: Little Rock, AR

Re: helicoil question

I wonder if they make the helicoil (or similar insert) that has a bigger outside diameter, but would still be 3/8 inside? That would solve your problem, right?

Mar 5, 2005 | 10:25 AM

rocmemphis

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From: Memphis, TN, US

Re: helicoil question

Quote:

Originally Posted by shoebox

I wonder if they make the helicoil (or similar insert) that has a bigger outside diameter, but would still be 3/8 inside? That would solve your problem, right?

Yes that would solve my problem. I have been looking for such a helicoil but I dont think they exist

Mar 5, 2005 | 10:27 AM

rocmemphis

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Joined: Nov 2000

Posts: 374

From: Memphis, TN, US

Re: helicoil question

Quote:

Originally Posted by elguapo

Are the heads still on the car?

The heads are still on the car. I am trying everything in my power to get this fixed w/o removing the heads

Mar 5, 2005 | 11:11 AM

shoebox

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Posts: 27,728

From: Little Rock, AR

Re: helicoil question

Quote:

Originally Posted by rocmemphis

Yes that would solve my problem. I have been looking for such a helicoil but I dont think they exist

Talk to a machine shop. They would know.

Mar 5, 2005 | 11:46 AM

1stz28

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Joined: Jul 2004

Posts: 195

From: Palm Bay, Fl

Re: helicoil question

I am almost certain there is helicoil to do exactly as you want. Tap the hole one size larger than final thread size. I agree with Shoebox, talk to a machine shop.