Sealing AN fittings fo fuel and oil lines

[TouringBubble]

Wht does everyone recommend for properly sealing AN/NPT fittings in the fuel and oil system? The VW guys say to use the paste style pipe sealer for oil, but I have no idea for fuel. Any thoughts?

[Chuck Baader]

AN fittings done properly need NOTHING!!! CB

[Cholewa]

What chuck said.

If you feel unsure, a little plumbers dope or dope tape on the threads should be fine, but if all the lines were put together correctly, and everything was tightened to spec, the ball/socket of the fittings should naturally compress and seal itself.

If you're freaked out about it, a little thread sealer shouldn't hurt.

[e30Racer]

I used Jegs Thread Sealant and it worked great!!!

I would also recommend picking up a set of these if you don't already have them. They make life soooo much easier when trying to put all the hoses and fittings together.

[JohnW8]

AN fittings done properly need NOTHING!!! CB

This right here!!! AN fittings Don't need anything on the threads. They aren't designed for that. Anything you put on the threads can get into the pipe and muck things up.

Pipe threads are a different matter. A smear of thread sealant seals everything up nice.

[kilgojr]

Yes, what Mark said. Jeg's thread sealant is very cool and works like a charm.

However, as Chuck said, if you have good quality AN fittings, and they are put together right, they should seal properly at the 37degree fitting and not leak. You shouldn't need any type of sealant on the threads.

[TouringBubble]

Alrighty, thanks! I've got several NPT threads I'm adapting to, so I will seal those. I've been using the pasty plumbers sealant.

[Cholewa]

dope (hurray double entendre)

[Chuck Baader]

For pipe to AN, use dope on water fittings. For oil, use the yellow teflon tape and don't get any into the oiling system. For AN to AN, use nothing...if it is ok on fighter and passenger aircraft, it is good enough for our silly race cars Chuck