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fuel hose no longer boring |
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tomj 
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Joined: Jan/27/2010 Location: earth Status: Offline Points: 7555 |
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 Topic: fuel hose no longer boringPosted: Mar/30/2019 at 11:17pm |
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well that sounds like just a lot of fun. O_o |
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1960 Rambler Super two-door wagon, OHV auto
1961 Roadster American, 195.6 OHV, T5 http://www.ramblerLore.com |
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ChillyB
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Joined: Nov/14/2018 Location: PA Status: Offline Points: 371 |
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Posted: Mar/30/2019 at 5:55am |
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On this topic, that gray "marine grade" glossy hose it also total crap. It has a clear membrane liner that turns to crunchy amber shards, after it delaminates and starves your engine. Happened every time I tried new lines on my outboard. Now I use automotive hose and replace every season.
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tomj
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Posted: Feb/20/2019 at 8:46pm |
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joe, if you have hose now in-service, and a week/month? later it's not noticably soft, it's probably OK. 30R7 rating is gasoline-only as far as i can tell; not alcohol resistant. i found this page http://www.underhoodservice.com/correct-fuel-hose-installation/ that has a bit of explanation. i think that, loosely, the common 30R7 hose is "old car" hose, and "fuel injection" is modern hose. i'm using "fuel injection" hose that has one of the low-permeability hoses. i don't know how stores ethically sell, in 2019, hose that almost immediately fails in service. it is very easy to see how this stuff could leak past under-tightened hose clamps. the short section i had from my new Tanks Inc tank to the fuel filter/pump produced about a tablespoon of an oily residue on the top of the tank. i need so little hose that i just bought the "fuel injection" hose from Pep Boys. nearly $5/foot! i think my 4 psi pump will be safe with 80 psi hose. it's dismaying to have to exert so much effort over hose. it's easy to fix -- get good hose -- but i'm kinda pissed off we're offered fuel hose that literally is unsafe in the state it's sold in. |
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1960 Rambler Super two-door wagon, OHV auto
1961 Roadster American, 195.6 OHV, T5 http://www.ramblerLore.com |
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Trader
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Joined: May/15/2018 Location: Ontario Status: Offline Points: 6913 |
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Posted: Feb/20/2019 at 3:17pm |
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The Dayco listed is the same as the Gates SAE 30R7.
Nylon tubing is rated as excellent resistance to Ethanol. The higher the concentration of Ethanol, the poorer most any polymer hose is going to be. Even the Gates SAE 30R9 specification states:
Resistant, not impervious. |
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73Gremlin401
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Posted: Feb/20/2019 at 2:26pm |
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Thanks for the information Tomj, I just looked at the underhood fuel hoses that I replaced on my Concord last summer, and they are all spongy and swollen. Ordered a couple rolls of 1/4 and 5/16 barricade line, as I've got 3 cars that are all in the same situation as the Concord. I dropped the tank on the Concord and replaced those last summer too - looks like I'm gonna be dropping the tank again - but at least now I know I'll be doing it with the right stuff.
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73 Gremlin 401/5-spd.
77 Matador Wagon 360/727. 81 Jeep J10 LWB 360/4-spd 83 Concord DL 4-dr 258/auto  |
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pacerman
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Posted: Feb/20/2019 at 11:42am |
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Does anyone know if Gates 5/16ths hose spec. 4219XL PCV/EEC (SAE 30R7) uses the same rubber specification as the Dayco hose above? The Gates hose is available at my local O'Reilly's and was used on a couple of cars by club members last summer. The hose is rated for 50 psi but specifically states that it is not for fuel injection cars. Joe
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Happiness is making something out of nothing.
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tomj
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Posted: Feb/18/2019 at 10:00pm |
YES! i just now, AGAIN, for the SECOND TIME, rebutted those assertions, and backed it up with specs from the freakin' manufacturer. it's not like some preference thing, the hose actually leaks fuel out the black rubber! i'm so sorry you had a fire from this. i've written Summit and pointed out that even though the disclaimer is there, it's all too easy to mis-use this hose, at best. and very likely, there is NOWHERE IN THE US that you can be guarenteed that fuel won't have alcohol etc in it. i assume that this is another one of these "old car" parts issues -- i dont know how you'd find out, but carbureted cars are probably under 1% of the national fleet of cars on the road. no one's gonna reformulate carb fuel hose since it's a shrinking market. i don't think Summit or anyone should even sell this stuff in 2019. |
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1960 Rambler Super two-door wagon, OHV auto
1961 Roadster American, 195.6 OHV, T5 http://www.ramblerLore.com |
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maximus7001
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Posted: Feb/18/2019 at 9:35pm |
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It does not help who do not know that the Q&A on that summit page says it can work with alcohol when it clearly cannot. I almost lost my Eagle to fire because of this within 1 year of putting the hose on.
Edited by maximus7001 - Feb/18/2019 at 9:37pm |
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1968 Javelin SST
1997 GMC Safari AWD 2001 Daewoo Nubira SX (Winnipeg only model) 1997 Honda Accord EX (Canadian Model) Winnipeg, home of the Jets. |
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tomj
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Posted: Feb/18/2019 at 9:23pm |
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you're welcome joe. i hopeit's useful. for the record this is the soft hose: It's Dayco 80060, 5/16" fuel hose. i could have known better if i'd read the fine print on the item page: "Not intended for fuel injected vehicles. Not suitable for gasoline/oil mixed fuels, alcohol blended fuels, or bio-diesel fuel." All CA fuel, at least, has alcohol and additives. those are hardly rare outside of CA (i just don't know). |
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1960 Rambler Super two-door wagon, OHV auto
1961 Roadster American, 195.6 OHV, T5 http://www.ramblerLore.com |
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wheelz
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Joined: Jan/29/2019 Location: NJ Status: Offline Points: 101 |
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Posted: Feb/18/2019 at 5:45pm |
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aeroquip sstartlite nomex braided hose is all I use. With or without fittings
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maximus7001 wrote: