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AN fitting/ fuel line leaks. help!
#198210
01/19/09 05:19 PM
01/19/09 05:19 PM
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Joined: Jan 2003
Posts: 5,281
In a town not near you.
clownzilla
OP
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OP
Joined: Jan 2003
Posts: 5,281
In a town not near you.
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I have a couple fuel leaks on my new fuel system that I need to adress before I go on a maiden voyage to get my exhaust welded up.
I have two spots where I have AN fittings screwed to a chrome shut off valve and also at my fuel pressure regulator.
I bought all this stuff from Jegs at the salesman's recommendations.
I was okay with no leaks at first but have developed a couple leaks as the car sat.
I tried to snug them up a bit, but not too tight and they seem tight enough.
Is there some kind of sealant that can be used to keep a better seal or do I have to start all over again, maybe with some different composition regulator and shut off valve?
I'm all ears, thanks.
The early bird gets the worm, and the second mouse always gets the cheese.
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Re: AN fitting/ fuel line leaks. help!
[Re: clownzilla]
#198211
01/19/09 05:28 PM
01/19/09 05:28 PM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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You might unscrew them, blow them clean with brake clean, eyeball the threads for any nicks/damage,thread them together dry & see if it screws in smoothly then unscrew them & lube them w 30 wt eng oil. I drip several drops of oil on then blow most of it off with an air nozzle EDIT I forgot the most important part, check the condition of the flare & the seat that it seats against which is what is doing the sealing. Been doing NPT stuff too long. The flare needs to be perfect
Last edited by RapidRobert; 01/19/09 05:46 PM.
live every 24 hour block of time like it's your last day on earth
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Re: AN fitting/ fuel line leaks. help!
[Re: Andrewh]
#198213
01/19/09 08:59 PM
01/19/09 08:59 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
Did not know this when I put my fuel system together.
There are two types of AN fitting. One seals with a flare, the other seals via o-ring.
They both bolt into each other, but won't seal.
If it uses an o-ring, it "ain't" AN, which IS by definition "flare."
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Re: AN fitting/ fuel line leaks. help!
[Re: RapidRobert]
#198214
01/19/09 09:10 PM
01/19/09 09:10 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
I Live Here
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I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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Quote:
You might unscrew them, blow them clean with brake clean, eyeball the threads for any nicks/damage,thread them together dry & see if it screws in smoothly then unscrew them & lube them w 30 wt eng oil. I drip several drops of oil on then blow most of it off with an air nozzle EDIT I forgot the most important part, check the condition of the flare & the seat that it seats against which is what is doing the sealing. Been doing NPT stuff too long. The flare needs to be perfect
 sometime's you just need to snug them up, aluminum will crush a little and seep. 
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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