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Old 06-21-2016, 09:58 PM   #1
geezer#99
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Re: New Holley carb, gas leak at fuel inlet

First off, don't use teflon tape on flare fittings!
Makes them leak. They seal on the flare, not the threads.
If you have a fitting that doesn't seal well, then you gotta move a little metal.
Snug it up, back it off, snug it up a little further, back it off again and then snug it up a little further yet. The flare heats up a little and the mating surfaces seat togethor.
You might need to do it several times.
We used to call that 'lapping'!
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Old 06-22-2016, 05:53 AM   #2
Jhawk73
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Re: New Holley carb, gas leak at fuel inlet

I did not use tape on the flares just where the gauge would go and on the end where the supplied bung goes in to the fuel line.
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Old 06-22-2016, 06:27 AM   #3
Shady Rascal
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Re: New Holley carb, gas leak at fuel inlet

Quote:
Originally Posted by Jhawk73 View Post
I did not use tape on the flares just where the gauge would go and on the end where the supplied bung goes in to the fuel line.
Geezer wasn't talking to you. He was talking to the original guy who started this thread and asked the question. His picture clearly shows a bunch of teflon tape on flare fittings, which is incorrect. Like was said, teflon tape is for tapered thread fittings like pipe thread, not for flare fittings.
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Old 06-22-2016, 11:52 AM   #4
GASoline71
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Re: New Holley carb, gas leak at fuel inlet

Quote:
Originally Posted by geezer#99 View Post
First off, don't use teflon tape on flare fittings!
Makes them leak. They seal on the flare, not the threads.
If you have a fitting that doesn't seal well, then you gotta move a little metal.
Snug it up, back it off, snug it up a little further, back it off again and then snug it up a little further yet. The flare heats up a little and the mating surfaces seat togethor.
You might need to do it several times.
We used to call that 'lapping'!
THIS!!! ^^^

Gary
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My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread.

The Rebuild of Creeping Death after the wreck

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