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Author Topic: Fuel hoses gone bad  (Read 248 times)
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Nigel
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« on: June 22, 2024, 02:40:49 PM »


These are two fuel hose types that I installed about 3 years ago.
The 13mm hose is marked R6 and branded AGOMA
The 8mm is a Gates, made in Turkey, not marked R6.

At the time I was unaware of the 'R' ratings hence fitted what ever seemed suitable.
When I became aware, I decided to leave them on and monitor their condition.
I'm now glad that I had that, albeit forced, opportunity.

I'd advise checking if you've used either of these types.




* 20240622_badhoses_resized.jpg (1094.34 KB, 1500x2000 - viewed 73 times.)
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« Reply #1 on: June 22, 2024, 03:41:55 PM »

Hi Nigel,
Iíve been through the same process a week ago on the VX coupe. The smell of petrol appeared coming home from work a week ago and when I got under the car I found damp hoses from the tank. A little squeeze and hey presto. Fuel raining down.
All pipes now replaced with R6 purchased from Halfords as I was in a rush to stop the car leaking plus they had it in stock. Letís see how long these last.
When I get home (currently stuck in Italy thanks to cancelled easyJet/Gatwick air traffic control problems) I intend replacing the hoses on the Berlina again as the pipes underneath are around 3 years old and I canít remember where I got the hoses from. Hard to see above the crossmember.
Itís a battle to find hoses that really are what they say they are. Fake pipes are out there. 

Ian
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SanRemo78
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« Reply #2 on: June 22, 2024, 05:57:47 PM »

I'd recommend sourcing them from Car Builder Solutions and going for fuel injection specs, overkill, but the potential consequences of a failure (especially with an electric fuel pump) don't bear thinking about....

Guy
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peteracs
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Peter Stokes


« Reply #3 on: June 26, 2024, 09:05:21 PM »

Hi Ian

You need R9 not R6

I used Cohline, do not use unbranded, Gates should be a good alternative

Peter
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Nigel
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« Reply #4 on: June 27, 2024, 10:10:12 PM »

My subsequent research indicates that R6 and R9 have similar
resistance to ethanol.
R9 is indeed rated for the higher pressure of fuel injection which I
don't need at present. There is a maybe that later I will fit FI but
that would entail reworking the fuel supply to accommodate a rear mounted
fuel pump, so I'll put R9 on a future build.

Thanks for all your comments
Nigel
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1984 2.0 Carb HPE [ex Aus] Grigio Finanza.
2007 Mazda 6 2.3 [current daily, highly recommended]
The past:
1980 2.0 HPE White in South Africa [hope it survives!]
1976 1.6 Coupe Lancia Blu [PFG 76R] [probably deceased]
oh,and an Uno Turbo 1997 also in SA [stolen,never recovered]
peteracs
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Peter Stokes


« Reply #5 on: June 27, 2024, 10:24:23 PM »

Hi Nigel

Not sure it is quite that simple. If you read this article the table referring to the various R ratings shows that the R9 versus R6 has a much lower permitivity rating. Also I read that the lining differs between the two which may explain the difference.

http://www.volksbolts.com/faq/fuelhose.htm#Problems

Peter
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Nigel
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« Reply #6 on: June 28, 2024, 10:27:18 PM »

Hi Peter,

I stand corrected. This appears to be the article I also found but
I clearly didn't read it properly.

Thanks,
Nigel
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1984 2.0 Carb HPE [ex Aus] Grigio Finanza.
2007 Mazda 6 2.3 [current daily, highly recommended]
The past:
1980 2.0 HPE White in South Africa [hope it survives!]
1976 1.6 Coupe Lancia Blu [PFG 76R] [probably deceased]
oh,and an Uno Turbo 1997 also in SA [stolen,never recovered]
squiglyzigly
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« Reply #7 on: June 29, 2024, 12:09:07 PM »

As I was in a rush to stop my car leaking on the drive I took a punt and grabbed some R6 from a local Halfords store. I sold it to myself on the basis that Halfords is a big name and surely wouldnít risk selling fake/substandard fuel hose. Itís rated for e10. Iíll keep an eye on it as always and try to make a point of changing the hoses as part of a service regime every 3-4 years.

Cheers
Ian
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VX HPE (resto started Sept Ď21)
Beta Saloon 2.0l s2 1979 (completed July 2020)
Beta coupť VX (completed April 2017)
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