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8bit Innovations Samba Member
Joined: August 14, 2019 Posts: 160
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Posted: Mon Mar 15, 2021 11:02 am Post subject: Fuel hose catastrophe |
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Yesterday I replaced my 67 bug battery, so as with all battery replacements I give the engine a spin to see if it cranks alright. However, I am watching the engine run with the cover up and notice a pretty significant FUEL LEAK from the hose that runs from the pump to the carb. And I’m not talking just some moisture, I’m talking about a pretty sizable stream coming out of the hose, thank god I was able to stop the engine very quickly! Anyway, Since the hose itself was broken, we got a replacement fuel hose, however it wasn’t only unthreaded, it was 4.8 mm instead of the manual spec 5mm. I noticed the hose went in smoothly and everything went back to normal. However, I am a bit worried that using a different kind of hose may increase the odds of an engine fire (the engine has never been changed, so I am super worried of it going up in flames). Is it ok if I run the car with that hose or should I get a 5mm threaded one like it used to have before?? _________________ -8Bit
67 Bug Puerto Rico spec Deluxe sedan Fontana Grey (Acquired from original owner’s family)
Last edited by 8bit Innovations on Mon Mar 15, 2021 7:09 pm; edited 1 time in total |
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KTPhil Samba Member
Joined: April 06, 2006 Posts: 35030 Location: Conejo Valley, CA
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Posted: Mon Mar 15, 2021 11:13 am Post subject: Re: Fuel hose catastrophe |
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Check the hoses under the tank, and next to the tranny as well. |
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VOLKSWAGNUT Fastest VW Belt Changer
Joined: October 14, 2007 Posts: 11121 Location: Flippin' a Belt........ .... Off-n-On ... NC USA
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Posted: Mon Mar 15, 2021 12:38 pm Post subject: Re: Fuel hose catastrophe |
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^ Agree check them all.
Threaded fuel hose ?
Do you mean the hose with the cloth braiding on the outside??
There is much better fuel hose today than those used in 1938..
3/16 or 4.8mm proper type fuel hose is not going to cause a fire....
Loose carb and fuel pump fittings that pop out and not maintaining deteriorated fuel hoses are what causes fires.
I am in the minority of those that WILL NOT use the original style German Fire Hose.
. _________________ aka Ken {o\!/o}
Its your vehicle- stop askin' for approval-do what YOU like for cryin' out loud
Better to roll em' how you want and wear em' out-than lettin' em' rot out
Its about the going not the showing
Rebuilt to drive not decorate
WANTED: Local Eatin' Joints, Triple D for TheSamba contributions here http://www.thesamba.com/vw/forum/viewtopic.php?t=570510
Search "VOLKSWAGNUT" on YouTube since you cant watch a "certain" BELT change video round here
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8bit Innovations Samba Member
Joined: August 14, 2019 Posts: 160
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Posted: Mon Mar 15, 2021 1:11 pm Post subject: Re: Fuel hose catastrophe |
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VOLKSWAGNUT wrote: |
^ Agree check them all.
Threaded fuel hose ?
Do you mean the hose with the cloth braiding on the outside??
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Exactly, the one with braid on the outside and rubber on the inside. I like how it looks, but it looks very dated compared to modern hoses though. _________________ -8Bit
67 Bug Puerto Rico spec Deluxe sedan Fontana Grey (Acquired from original owner’s family) |
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8bit Innovations Samba Member
Joined: August 14, 2019 Posts: 160
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Posted: Mon Mar 15, 2021 1:12 pm Post subject: Re: Fuel hose catastrophe |
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Well, that’s reassuring. At least now I know that the engine will not go up in flames. Next order of business will be a thorough inspection of all remaining hoses under the transmission and the fuel tank to avoid further leaks, since they might be in similar or worse condition than the one that broke. Thank you all for the quick responses! I owe you all one! _________________ -8Bit
67 Bug Puerto Rico spec Deluxe sedan Fontana Grey (Acquired from original owner’s family) |
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EverettB Administrator
Joined: April 11, 2000 Posts: 70647 Location: Phoenix 602
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8bit Innovations Samba Member
Joined: August 14, 2019 Posts: 160
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Posted: Mon Mar 15, 2021 7:23 pm Post subject: Re: Fuel hose catastrophe |
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EverettB wrote: |
I don't what fuel hose you bought but you want to make sure it's rated for today's ethanol fuels.
This stuff is good
https://www.belmetric.com/multifuel-hoseethanol-ap...-9852.html
I have the non-braided stuff from BelMetric and it's lasted for year when I was replacing the other braided hose I had almost every year due to wear/leaks.
I need to order some braided stuff too to have the right VW "look". |
A quick check on a second slice of new hose reveals me that I blindly got the nice stuff too! It’s from one in a line of stores frequented by old timey mechanics, so it is definitely what should be going into my engine. I would have preferred a braided one like it originally had, but I would rather see my engine bit period incorrect instead of seeing it serve as my new bonfire. Thanks for the insight on the correct hose specs to you too! I owe you one too! _________________ -8Bit
67 Bug Puerto Rico spec Deluxe sedan Fontana Grey (Acquired from original owner’s family) |
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Matt Wilson Samba Member
Joined: November 14, 2005 Posts: 2411 Location: Colorado
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Posted: Mon Mar 15, 2021 7:35 pm Post subject: Re: Fuel hose catastrophe |
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The trick with 'new' hose with rubber cover is that it's not usually found in metric diameters readily here in the USA. The Belmetric is a good source for metric ID hose, with the old textile braided cover.
Hose with a rubber cover is essentially three layers: inner tube, textile reinforcement and rubber cover. The tube holds the media inside the hose and must chemically work with whatever media you convey, the reinforcement helps with pressure, and the cover protects the reinforcement.
Hoses with rubber cover may also have some downsides, like UV damage/ozone cracking, and require a bigger ID clamp for the larger hose OD. Often the bend radius is larger, meaning that it can't make as small a bend without kinking over. The braided textile cover material (which is only inner tube and textile cover) will not show any cracking for better or for worse (as evidenced by your dramatic leak). It is generally smaller OD, tighter bend radius, and the dense textile braided cover protects the tube from being cut or permanently indented by the clamp.
Hoses, like any other rubber component, are wear items. They should be periodically replaced, especially ones that get baked in the sun, or in a hot engine compartment. Use new ones periodically, that fit well and are rated for the application, and you'll be okay. _________________ 1972 Standard Beetle
1969 Baja Beetle |
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iowegian Samba Curmudgeon
Joined: February 16, 2005 Posts: 9898 Location: Somewhere between Dubuque and Keokuk
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Posted: Mon Mar 15, 2021 8:08 pm Post subject: Re: Fuel hose catastrophe |
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EverettB wrote: |
I don't what fuel hose you bought but you want to make sure it's rated for today's ethanol fuels.
This stuff is good
https://www.belmetric.com/multifuel-hoseethanol-ap...-9852.html
I have the non-braided stuff from BelMetric and it's lasted for year when I was replacing the other braided hose I had almost every year due to wear/leaks.
I need to order some braided stuff too to have the right VW "look". |
What clamps from BelMetric would you suggest using with this hose for the right "look"? |
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EverettB Administrator
Joined: April 11, 2000 Posts: 70647 Location: Phoenix 602
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