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Push lock fuel line AN fittings...troubles

cheavyk10

cheavyk10

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So these are the style of an fuel line push locks that came with my command center 2.0. I was wondering if anybody has ever had any trouble with these.
I was down at my local harbor freight today picking up some stuff and on the way home my truck died at a busy intersection in the turn lane. I popped the hood to see 58 psi of 93 octane spaying right at my headers, luckily the truck was pretty cool or this could have been a super disaster. What had happened was one of the fuel lines blew off one of these fittings. It was an easy fix as I grabbed a hose clamp and put it back together right there in the street.
The hose seems like it got pretty soft probably from crappy ethanol gas. Now I'm wondering if I should put hose clamps on all of these fittings for safety sake after I replace the hoses. Obviously it's not the way these fittings were designed to work but I don't want this to happen again.
Has anyone else had a similar experience with these type of fittings?
IMG_20210725_115250541.jpg
 
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I wouldn't trust that line anymore. Once having one blow apart like that would be all I need to step up to a better fuel line. I read over the Command 2.0 on Summit and it claims to be E85 ready, so the ethanol in the fuel shouldn't be an issue. However I'd still want to maybe upgrade to the PTFE lined fuel line. That stuff should need a little heat and lube to be able to be assembled, and won't come apart without a knife.
 
This is the fuel line that came with the command center. As it is a kit all inclusive with the fittings fuel filter and lines.
 
Fwiw, Goodyear (and maybe other companies) make push lock hose. If you’re really worried and want to avoid clamps maybe switch to that hose.

I’ve used push locks on everything possible for 25+ years and never had a line come apart (thankfully). I would think there’s probably contributing factor to cause the failure.
 
I run russell twist-lok on everything I have sub 200 psi. Never had a single failure. once they are set they are so tight I cant even twist them, let alone pull them off. The entire fuel system on all my vehicles are made up of them, all of my steering return lines, even some coolant lines.

How did you assemble the hose? Did you lubricate them? What brand hose? What brand fittings? If the hose got soft then it wasn't rated for the gas it was carrying. Get better hose.

There are air planes flying over your head with this type of fitting. Semi trucks and tractors all over with it.

I would advice not to clamp them. They were not made for that. IF you do decide to clamp them I would use the crimp style like this It is way to easy to over tighten and damage the hose on a sharp barb with worm style clamps.
 
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I got those with my FAST efi kit and hated them. I used the hose to get an exact length of what I needed and had a local shop use better hose and crimped AN fittings. Pay the money for some good lines and get piece of mind. I did that on my LS swap ‘68 c10 also.
 
TreeFarm said:
I run russell twist-lok on everything I have sub 200 psi. Never had a single failure. once they are set they are so tight I cant even twist them, let alone pull them off. The entire fuel system on all my vehicles are made up of them, all of my steering return lines, even some coolant lines.

How did you assemble the hose? Did you lubricate them? What brand hose? What brand fittings? If the hose got soft then it wasn't rated for the gas it was carrying. Get better hose.

There are air planes flying over your head with this type of fitting. Semi trucks and tractors all over with it.

I would advice not to clamp them. They were not made for that. IF you do decide to clamp them I would use the crimp style like this It is way to easy to over tighten and damage the hose on a sharp barb with worm style clamps.
Click to expand...
The hyperfuel command center 2.0 came as a kit with the lines and the fittings. Probably made in China. As far as assembly went I used a dab of assembly lube and pushed them together.
I do have a bunch of Earls crimp style clamps that I might put to use.
 
Cheavyk10 said:
The hyperfuel command center 2.0 came as a kit with the lines and the fittings. Probably made in China. As far as assembly went I used a dab of assembly lube and pushed them together.
I do have a bunch of Earls crimp style clamps that I might put to use.
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Is there any markings on the hose? It should be labeled.

The way I assemble them without the tool is to soak the end of the hose in boiling water for a bit to soften it up. That way you can avoid lube. Put the fitting in the vise and press the hot hose onto the fitting quickly. Make sure to get it seated fully. If you do need to use lube try using something that will dry like soap. that -06 3/8" hose can be a pain to get fully seated.
 
TreeFarm said:
Is there any markings on the hose? It should be labeled.

The way I assemble them without the tool is to soak the end of the hose in boiling water for a bit to soften it up. That way you can avoid lube. Put the fitting in the vise and press the hot hose onto the fitting quickly. Make sure to get it seated fully. If you do need to use lube try using something that will dry like soap. that -06 3/8" hose can be a pain to get fully seated.
Click to expand...
IMG_20210725_190931313.jpgHere's a pic of the hose. So now that you say that about the lube maybe using assembly lube was the wrong product. The stuff I used is made for cams and bearings. It probably never dried up and left a film of slipperiness.
 
this is what I ended up going with for an ls swap. I didn't trust push lock fittings. I haven't started the engine yet, but they seem good quality.

hotrodfuelhose.com

AN-8 Stainless Braided PTFE hose and 8 AN Fittings Bundle Deal

Stainless AN8 PTFE Hose and Fittings Kit – Premium Finish, Superior Durability This stainless steel AN8 PTFE hose and fitting kit offers exceptional durability and performance for your automotive plumbing needs. Built to handle high pressure and compatible with ethanol-based fuels, it's the...
hotrodfuelhose.com hotrodfuelhose.com
 
Yeah would suspect the lube that was used. petroleum based lubes are never kind to rubber based hoses.
 
Wes Harden said:
how old is that hose that failed ? Fragola says the PFTE hose is only good for @ 5 years, on blended fuel. So ....
Click to expand...

I didn't know that about ptfe. I thought that was only rubber hose. The place i bought mine has a lifetime warranty even when used with e85...
 
Well sounds like I'll be redoing my fuel lines without the lube this time at least I have enough parts and pieces to get it done without having to buy any more supplies
 
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Fragola show clamps on their ready made push lock hoses.

Requires them on a similar hose they have, for push locks

fragolaperformancesystems.com

EZ STREET LOW PERMEATION FUEL HOSE - Fragola Performance Systems

Part Numbers and Sizes Hose Size I.D. PER FT. 3 FT. 6 FT. 10 FT. 15 FT. 20 FT. -6AN 3/8" 730006 733006 736006 731006 731506 732006 -8AN 1/2" 730008 733008 736008 731008 731508 732008
fragolaperformancesystems.com fragolaperformancesystems.com

Now I can't find the 5 year replacement state on their site. I must be confused and spewing BS. Dam CRS and AGE viruses
 
seen too many people lost there hard earned time and money too those fittings failing and burning the thing to the ground if i have a vehicle and there on it thats the first thing to change
 
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