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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: sbx22 on October 12, 2011, 09:48:24 pm

Title: fuel line leakage
Post by: sbx22 on October 12, 2011, 09:48:24 pm

'74 350 with Holley Street Avenger dual inlet. Why the heck is my fuel line leaking? It doesn't squirt, but definitely wet and drips down the pipe. Brand new carb, brand new solid Holley line. I've tried to moderately torque the 5/8" nuts, then slightly increasing. Should I just dump these solid fuel lines and buy some rubber fuel lines instead? It appears to not be leaking out from where the threads are, but where the arrows are indicated on the picture below. All the endings are flared, which I should think helps it not leak as much. Any help is appreciated. Also, what fuel line has worked for you? I'm about done with this piece of crap line from Holley.



(http://i462.photobucket.com/albums/qq344/sbx22/large34-150.jpg)

Title: Re: fuel line leakage
Post by: Irish_Alley on October 12, 2011, 11:34:47 pm

theres no o-ring?

Title: Re: fuel line leakage
Post by: sbx22 on October 13, 2011, 12:22:49 am

no o-rings. Looks like they don't need o-rings. the flared parts are just supposed to mate together. I've been reading reviews and threads around the internet, I'm late the party. From what it sounds like, these solid chrome fuel lines suck. Stay away from it if you can! You've been warned.

Title: Re: fuel line leakage
Post by: Captkaos on October 13, 2011, 02:01:44 pm

They should have a flare that keeps them from leaking. 

Title: Re: fuel line leakage
Post by: bake74 on October 13, 2011, 08:43:13 pm

     The flare end of the tube and the flare end of the nut use compression to seal.  If there is any abrasions or anything on either flare parts you will get a slight leak, and over time will get worse. 
     My job, we use a lot of this style of flare/Jic fittings and they are great until you get a little scuff or scratch, and then they start to leak.

Title: Re: fuel line leakage
Post by: sbx22 on October 13, 2011, 11:56:43 pm

Well, I'm not recommending these flare type fittings. Such a PITA. Waste of time and money. Forgot to mention, I went through 2 sets of these. Anyway, will update anyone who is interested on what works for me.

Title: Re: fuel line leakage
Post by: bobcooter on October 14, 2011, 03:20:57 pm

Try wrapping them with a little teflon tape.

Title: Re: fuel line leakage
Post by: Irish_Alley on October 14, 2011, 06:01:39 pm

didnt think teflon and gas mixed.

Title: Re: fuel line leakage
Post by: VileZambonie on October 14, 2011, 08:22:10 pm

Sounds like you don't have them tight enough

Title: Re: fuel line leakage
Post by: sbx22 on October 14, 2011, 09:57:28 pm

I had the first set on soo tight that it started bending the line. From my research, teflon isn't safe because it can become dislodged and go into the carburetor, causing flood and then mass destruction --> fire. But what the heck, I tried the teflon on one of the sets anyway, still no luck.

Title: Re: fuel line leakage
Post by: paniolo on October 15, 2011, 02:56:28 pm

Cut the ends of and re flare them?  Teflon would only do good if it was leaking past the threads,  you have a leak at the flares.

Title: Re: fuel line leakage
Post by: sbx22 on October 16, 2011, 11:57:59 pm

http://www.jamestowndistributors.com/userportal/show_product.do?pid=9403&familyName=Permatex+Aviation+Form-A-Gasket+No.+3+Sealant
I read the link above, went out and bought it at O'Reilly's. It's from Permatex Form a gasket #3. Slapped it on, waited 4 hours, and voila, no leaks! Oh, also purchased a $60 line from summit
http://www.summitracing.com/parts/SUM-220106-B/