Your donations help keep this valuable resource free and growing. Thank you.
|
fuel hose no longer boring |
Post Reply | Page <123 |
Author | |
pacerman
Supporter of TheAMCForum Joined: Jul/03/2007 Location: United States Status: Offline Points: 9060 |
Post Options
Thanks(0)
|
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
|
|
Happiness is making something out of nothing.
|
|
73Gremlin401
Supporter of TheAMCForum Joined: Mar/02/2013 Location: Stmbt Sprgs CO Status: Offline Points: 955 |
Post Options
Thanks(0)
|
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.
|
|
73 Gremlin 401/5-spd.
77 Matador Wagon 360/727. 81 Jeep J10 LWB 360/4-spd 83 Concord DL 4-dr 258/auto |
|
Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6909 |
Post Options
Thanks(0)
|
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. |
|
tomj
AMC Addicted Joined: Jan/27/2010 Location: earth Status: Offline Points: 7553 |
Post Options
Thanks(0)
|
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. |
|
1960 Rambler Super two-door wagon, OHV auto
1961 Roadster American, 195.6 OHV, T5 http://www.ramblerLore.com |
|
ChillyB
AMC Nut Joined: Nov/14/2018 Location: PA Status: Offline Points: 371 |
Post Options
Thanks(0)
|
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.
|
|
tomj
AMC Addicted Joined: Jan/27/2010 Location: earth Status: Offline Points: 7553 |
Post Options
Thanks(0)
|
well that sounds like just a lot of fun. O_o |
|
1960 Rambler Super two-door wagon, OHV auto
1961 Roadster American, 195.6 OHV, T5 http://www.ramblerLore.com |
|
Post Reply | Page <123 |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |