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Old 07-27-2016, 09:10 PM   #21
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717,
Re your post #19 why would hot fluid solder not squeeze out into the outside and inside of the fuel line. It's a liquid, has volume and gets compressed. Can't help but see the excess get squeezed out. Not trying to argue .. just can't imagine it not happening.
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Old 07-27-2016, 10:44 PM   #22
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Quote:
Originally Posted by jleonard View Post
NPT threads are designed to use sealant.
NPTF threads are dry sealing.


Yup, you are correct. NPTF Also called Dryseal if I remember correctly.
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Old 07-28-2016, 09:49 AM   #23
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It has been suggested not to use Teflon tape on fuel lines as it could break off and get into the fuel system. Probably not when you install it, but when you take it apart in the future.


I just go to the home center and get pipe dope that's labeled for diesel fuel. Any sealant that's labeled for diesel fuel should work no matter where you get it.
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Old 07-28-2016, 11:25 AM   #24
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Loctite 545, works on gasoline and oil and ethanol and other fluids.
It is a thread sealer.
http://static.rshughes.com/wm/p/wm-a...2fe7b1.pdf?uf=
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Old 07-28-2016, 11:29 AM   #25
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Quote:
Originally Posted by Nomad Willy View Post
717,
Re your post #19 why would hot fluid solder not squeeze out into the outside and inside of the fuel line. It's a liquid, has volume and gets compressed. Can't help but see the excess get squeezed out. Not trying to argue .. just can't imagine it not happening.
I suppose because the threads are too tight fitting at their minor diameter when tightened up for it to leak into the inside area of the fuel pipes.

And it did not happen. I had no leaking into where the fuel flows.

Solder has a viscosity thicker than water when liquid and it has surface tension.
Any time soldering pipes, there must be a loose enough fit up to actually draw the solder into the fitting. There must exist a sufficient clearance space for solder to flow into and fill a space.
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Old 07-28-2016, 12:35 PM   #26
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I use rector seal tru-blue on all my npt fuel and coolant lines. If its something I will need to get apart later i will use white teflon paste.
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Old 07-28-2016, 02:39 PM   #27
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Quote:
Originally Posted by Nomad Willy View Post
717,
Re your post #19 why would hot fluid solder not squeeze out into the outside and inside of the fuel line. It's a liquid, has volume and gets compressed. Can't help but see the excess get squeezed out. Not trying to argue .. just can't imagine it not happening.
Pics or it did not happen?
Can anyone see this, I shared on google photos 2 pics as an album.
https://photos.google.com/share/AF1Q...U1UzRxMm81QWpR
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