Fuel line and thread lock
Burning Brakes
Joined: May 2007
Posts: 1,022
Likes: 33
From: Lokeren, Belgium
My powerjection installation manual highly recommends to use blue loctite threadlock on all fuel line connections, which I'm doing. System is not ready for startup so can't tell if any of them don't leak.
Nick
Nick
Race Director
Joined: Mar 2006
Posts: 14,112
Likes: 28
From: Florida
It is always good to lubricate the threads and inside of a tube nut when torquing, the same as you do bolts and nuts. Any galling and minor interference including the flare area can cause leaks. This helps mate all surfaces.
I usually use copper antisieze on the tube and nut threads, being carefull not to get it in the tube or fitting. Helps years later on disassembly.
On brass pipe threads a sealer is helpfull, but on the small automotive sizes, you can usually get away without it.
Again, lubricating will help, but I use Permatex Aviation Form-A-Gasket No. 3 Sealant, resistant to gasoline, and also acts a lube. This won't plug anything downstream as a tape can, if improperly used.
Also FYI, contrary to a lot of opinion, teflon tape (white or yellow) is not harmed by gasoline to cause failure, but upon multiple assembly cycles, it becomes shredded on the female threads and can be carried downstream.
I usually use copper antisieze on the tube and nut threads, being carefull not to get it in the tube or fitting. Helps years later on disassembly.
On brass pipe threads a sealer is helpfull, but on the small automotive sizes, you can usually get away without it.
Again, lubricating will help, but I use Permatex Aviation Form-A-Gasket No. 3 Sealant, resistant to gasoline, and also acts a lube. This won't plug anything downstream as a tape can, if improperly used.
Also FYI, contrary to a lot of opinion, teflon tape (white or yellow) is not harmed by gasoline to cause failure, but upon multiple assembly cycles, it becomes shredded on the female threads and can be carried downstream.
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Burning Brakes
Joined: Jun 2005
Posts: 1,113
Likes: 35
From: LaUgH, mOrE!
I have used the yellow (gas) teflon tape on fuel line connections. You just have to be careful when disconnecting, to clean it all off and put on new when reconnecting. Seems to seal well and you don't have to over-tighten. Be sure to use good flare nut wrenches. They can be a little pricey, but will save you headaches and money in the long run.
