| Fuel Line -bad reaction to gas [message #365046] |
Sun, 27 June 2021 11:10  |
MikeB
Messages: 133
Registered: December 2018
Location: South Bama
Karma: 1
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Yesterday I drained my fuel tanks because the fuel was old and weak and I’m planning to go over my entire fuel system. I bought some gates fuel injection hose to replace the short rubber line 8” from hard line to throttle body. In doing so of course some fuel got on the outside of the new line. Today I went to remove that “new” hose piece and I ended up with a thick black mess on my hands. The hose felt slick and sticky on the outside. I cut open the hose and it didn’t seem to be doing the same inside. I looked up the hose Gates 4219BF and it states it’s compatible with gas. I’ve never had to deal with injector hose but I thought the only difference was pressure strength. Any idea of what’s going?
I’m thinking the exterior is just not as resistant to gas as the inside layer. Just never ran into this before.
M Beam
75’ Avion
TBI EBL , 3.70 LSD and other stuff
Zuki Sidekick,
Dozier Al
[Updated on: Sun, 27 June 2021 11:25] Report message to a moderator |
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| Re: Fuel Line -bad reaction to gas [message #365059 is a reply to message #365046] |
Sun, 27 June 2021 16:39  |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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The next step up is E10 resistant submersible injection hose. What you use in the tank from pump to sender in very short lengths. Very expensive. You can switch to that or keep fuel inside the hose only
John Lebetski
Woodstock, IL
77 Eleganza II
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| [GMCnet] Re: Fuel Line -bad reaction to gas [message #365062 is a reply to message #365059] |
Sun, 27 June 2021 17:17 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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John,
That fully submersible hose comes from Turkey.
I had several people copy our in tank kit using the standard hose that
lasted only one year.
The standard hose has a "Barrier" , a nylon thin hose covered with regular
rubber.
On Sun, Jun 27, 2021 at 2:39 PM John R. Lebetski
wrote:
> The next step up is E10 resistant submersible injection hose. What you use
> in the tank from pump to sender in very short lengths. Very expensive. You
> can switch to that or keep fuel inside the hose only
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
> _______________________________________________
> GMCnet mailing list
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--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.gmcrvparts.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Fuel Line -bad reaction to gas [message #365072 is a reply to message #365059] |
Mon, 28 June 2021 00:36 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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JohnL455 wrote on Sun, 27 June 2021 16:39The next step up is E10 resistant submersible injection hose. What you use in the tank from pump to sender in very short lengths. Very expensive. You can switch to that or keep fuel inside the hose only
I had the same problem in a diesel environment (Inside the tank). The solution there was also submersible hose as John suggested. In your case just do not expose the outside of the hose to fuel.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Fuel Line -bad reaction to gas [message #365077 is a reply to message #365046] |
Mon, 28 June 2021 08:39 |
MikeB
Messages: 133
Registered: December 2018
Location: South Bama
Karma: 1
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I was just amazed at how bad the outer hose reacted to a little gas touching the outside. Especially since the gas is non-ethanol ( I’m guessing it’s not really completely ethanol free). I’m curious now about the condition of the small sections of rubber hose that are on both of my in-tank pumps. I have confidence though that my PO used the correct hose.
M Beam
75’ Avion
TBI EBL , 3.70 LSD and other stuff
Zuki Sidekick,
Dozier Al
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| Re: Fuel Line -bad reaction to gas [message #365080 is a reply to message #365046] |
Mon, 28 June 2021 09:08 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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On every Motortrend TV show I constantly see rubber fuel line and plastic filters feeding carbs. Big no no. I’ve said it here before but only factory type steel feeding carb. You can see what a little fuel splash from testing with air cleaner off or just a lot of heat and fumes can do. Degrades from outside in. “New” rubber hose ages way faster than expected and fire results. In-line add-on filter should go before pump in factory rubber hose at right front cross member. This way no additional hose is added. And use a barb/barb metal filter by Wix or other name brand, not plastic.
We had to drop the tank on a 7000 mile 89 Turbo Trans Am (involves dropping transverse exhaust and some suspension parts) because some “genius” used non submersible 1.5” hose piece in tank and it was spraying back into tank giving only 5 PSI at port injection fuel rail. No go.
John Lebetski
Woodstock, IL
77 Eleganza II
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| [GMCnet] Re: Fuel Line -bad reaction to gas [message #365082 is a reply to message #365077] |
Mon, 28 June 2021 09:30 |
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The only rubber hose in my entire fuel delivery system is the two 2"
sections that came with my Airtex "In Tank" pumps that connect them to the
suction lines. One of those failed a couple of months after installation,
stopping me dead in my tracks. The other one survives to this day, about 5
years now. Go figure!
But I'm prepared, just in case. ;-)
bdub
On Mon, Jun 28, 2021 at 8:40 AM wrote:
> I was just amazed at how bad the outer hose reacted to a little gas
> touching the outside. Especially since the gas is non-ethanol ( I’m
> guessing it’s not really completely ethanol free). I’m curious now about
> the condition of the small sections of rubber hose that are on both of my
> in-tank pumps. I have confidence though that my PO used the correct hose.
>
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bdub
bdub.net
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| Re: Fuel Line -bad reaction to gas [message #365083 is a reply to message #365046] |
Mon, 28 June 2021 10:15 |
Tom Katzenberger
Messages: 399
Registered: June 2019
Location: Kingsville, MD
Karma: 4
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Senior Member |
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Billy,
Did you use steel, stainless steel or copper to run your fuel lines?
Thanks
Tom K.
Tom & Oki Katzenberger,
Kingsville, Maryland,
1977 23' Birchaven, 455 C.I.D., Micro Level, Howell EBL-EFI Spark Control, Macerator, York Air Compressor, 6 Wheel Disc, Quadra Bag, Onan W/Bovee Ignition
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| [GMCnet] Re: Fuel Line -bad reaction to gas [message #365090 is a reply to message #365089] |
Mon, 28 June 2021 14:25 |
bdub
Messages: 1578
Registered: February 2004
Location: Central Texas
Karma: 5
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Quadrajet. I do have a stainless wrapped teflon line from the firewall.
bdub
-----Original Message-----
From: mtb8114@gmail.com [mailto:mtb8114@gmail.com]
Sent: Monday, June 28, 2021 11:54 AM
To: gmclist@list.gmcnet.org
Subject: [GMCnet] Re: Fuel Line -bad reaction to gas
Billy
So your hard line connects directly to your TBI with no rubber line for flex?
--
M Beam
75’ Avion
TBI EBL , 3.70 LSD and other stuff
Zuki Sidekick,
Dozier Al
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bdub
'76 Palm Beach/Central Texas
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