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#1
04-08-2008, 01:38 AM
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Teflon tape on flare fittings
I see lots of resto's with teflon tape on the flare fittings... fuel lines and sometimes brake lines... can anyone explain this to me? I have never seen teflon tape cure a flare fitting leak...
Also do the judges dock points for it?
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~JAG~ NCRS#65120 68 GTO HO 4 spd Alpine Blue /Parchment 2 owner car #21783 71 Corvette LT1 45k miles Orig paint - Brandshatch Green - National Top Flight - last known 71 LT1 built. 71 Corvette LT1 42k miles Original paint - Black - black leather - only black LT1 known to exist. NUMEROUS Lemans blue Camaros, Monza Red and Daytona Yellow Corvettes & a Chevelle or two... Survivors, restored cars, & other photos https://picasaweb.google.com/lh/myphotos 
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#2
04-08-2008, 01:46 AM
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Re: Teflon tape on flare fittings
Makes no sense. A bad flare is a bad flare.
__________________
 <span style="font-weight: bold"> (__{B}_____]]]]~~~~</span>Don't mess with old farts - age and treachery will always overcome youth and skill! Bullshit and brilliance only come with age and experience.
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#3
04-08-2008, 01:56 AM
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Re: Teflon tape on flare fittings
Also teflon tape softens and breaks down when it comes in contact with any kind of solvent or petroleum based fluid ...........Use the blue paste used on natural gas and oil fittings if you feel it necessary to use anything...But flare fittings in most cases are not very forgiving if the flare is bad as Belair said...
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#4
04-08-2008, 02:51 AM
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Re: Teflon tape on flare fittings
Threads on a flare fitting do nothing as far as sealing. The seal comes from the taper of the pipe or tubing being pressed into the sealing surface of the fitting. A thread lube is a good idea on the threads just to prevent galling and make the flare nut tighten down a little easier.
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Tony 55 Nomad Gasser 70 SS 427 Nova 34 Ford Sedan..Hemi powered Michigan/ Florida
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#5
04-08-2008, 02:52 AM
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Re: Teflon tape on flare fittings
The nut doesn't seal, it just holds the flare surfaces tightly together so that they don't leak. Bad flare, bad leak. It's not a pipe thread.
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Chevelleless after 46 years......but we did find a low mileage, six speed, silver 2005 Corvette. It will just have to do for now. 
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#6
04-08-2008, 02:54 AM
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Re: Teflon tape on flare fittings
Teflon tape was not originally used, and is not needed in a flare fitting application.
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Steve Shauger The Supercar Registry www.yenko.net Vintage Certification™ , Providing Recognition to Unrestored Muscle Cars. Website: www.vintagecertification.com
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#7
04-08-2008, 03:38 AM
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Re: Teflon tape on flare fittings
Plus if the tape tears and gets into a line it could plug the line. I was priming a motor I rebuilt. I used teflon tape on the threads for the oil gauge. At first I wasn't getting a pressure reading on the gauge. When I removed the gauge, the tape was covering the small hole for the gauge.
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 1969 SS396 Post Sedan Delivered to Van-T Topeka KS MCACN Day2 Concourse Gold Award 1965 VW El Lobo Dune Buggy built in the mid 70’s for the Iowa Shriners 1968 Schwinn Orange Krate 1969 Schwinn Pea Picker 1968 Schwinn 5-Speed 1970 Schwinn 3-Speed Deluxe 1972 Schwinn 10-Speed Continental 1973 Schwinn 5-Speed Suburban All Original Paint Bikes
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#8
04-08-2008, 04:02 AM
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Re: Teflon tape on flare fittings
OK
 --In a ****quick fix ****if the flare is just having a problem seating against the face of the nipple fitting and unless the flare itself is not split or chipped--wiping some blue paste on & around the **face** NOT threads of the nipple fitting usually stops the leak----------I've had to make ***temporary repairs*** in a pinch ------Replacing a worn flare fitting is the proper procedure for a permanent repair--------save teflon for the faucet. ......
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#9
04-08-2008, 05:01 AM
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Re: Teflon tape on flare fittings
<font color="blue">I've seen a locking compound on threads so they do not back off. Not for sealing though. </font>
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Mike Fabian 
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