Date: Sun, 2 Aug 2020 14:49:25 -0600
Reply-To: OlRivrRat <OlRivrRat@COMCAST.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: OlRivrRat <OlRivrRat@COMCAST.NET>
Subject: Re: Fuel hose size
In-Reply-To: <CACvdLxPALZKf81LwAAWqcuqDYKsaw459V0cURhm0KBCEcQBeBg@mail.gmail.com>
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David McN
I would suspect that the answer would depend A Lot on the Quality of Hose
that You used back in '08 ~ But probably a Thorough Inspection is In Order & If
the decision is that it Looks OK then maybe add that inspection to a SpringTime
Before going traveling Check List & Play It By Eye ~
ORR ~ DeanB
On 2 Aug , 2020, at 12:18 PM, David McNeely wrote:
> Dennis, you are onto something, but another group I respect greatly seems
> not to have considered the static concern to be a problem, or else has
> simply not considered it. GoWesty sells a grommet specifically for the
> purpose of running a hose through the hole in the "firewall." My 1991
> Volkswagen Vanagon GL Campmobile has been so equipped since 2008.
>
> Speaking of 2008, that is when I replaced all the fuel hoses. I have asked
> before on this list if it is time to do so again, but no one has responded
> to the question. Is it time?
>
> Thanks, mcneely
>
> On Sun, Aug 2, 2020 at 7:53 AM Dennis Haynes <d23haynes57@hotmail.com>
> wrote:
>
>> I am not sure that this is a good approach. When looking at fuel hoses we
>> look at pressure and temperature ratings and we pay attention to the outer
>> jacket and how it will interface with clamps. What I never see mentioned is
>> conductivity or the ability to dissipate static charges nor the ability to
>> resist electrolysis. That is what really causes hoses to crack and fail on
>> the inside.
>>
>> Whenever a fluid flows through a tube or hose static charges are
>> generated. Even when you fill a plastic gas can, the can is static
>> dissipative and hence the signs at the filling station advising the
>> container shall be placed on the ground and the nozzle in contact with the
>> container while filling. That plastic tube is a life time part. Hoses are
>> not although the original have lasted 10 -15 years or even more. With VW
>> being cost conscious as they are there is no part or design that doesn't
>> serve some purpose. My thoughts are that the hose sections are kept short
>> for a reason and it could even be that that firewall nipple is a
>> strategically place insulator, in addition to a service feature for engine
>> removal. The longer a hose the higher the static potential can be. I
>> really don't know, just a thought and all modifications needs thought. I
>> just give the VW engineers credit for knowing a lot more than me.
>>
>> Dennis
>>
>>
>> -----Original Message-----
>> From: Vanagon Mailing List <vanagon@gerry.vanagon.com> On Behalf Of
>> Richard Koerner
>> Sent: Saturday, August 1, 2020 7:37 PM
>> To: vanagon@GERRY.VANAGON.COM
>> Subject: Re: Fuel hose size
>>
>> Superb! Well thought out.
>>
>> On Saturday, August 1, 2020, 3:46:04 PM PDT, OlRivrRat <
>> olrivrrat@comcast.net> wrote:
>>
>> IMHO,, The Correct Way To Do the Fuel Supply Hose Replacement
>>
>> & The Way that I Always Recommend that It Be Done is to Run 1 Single
>>
>> Length of High Pressure Fuel Injection Hose frm Fuel Filter to the Splitter
>>
>> "T" by the OilBreather Tower ~ You end up with Only 2 Possible Leak Points
>>
>> Instead of 6 & a Brand New, Really Strong, All 1 ID Hose ~
>>
>> (I use 225PSI Gates 5/16) It is Pricey Hose @ about $3.50/Ft but only takes
>>
>> about 6.5Ft >> Way Cheaper than an Engine Fire ~
>>
>> Also >> I usually DoNot run the Hose back through the hole left by
>> the
>>
>> removal of the Old Plastic PasThru Fitting, I just run it under the
>> FireWall &
>>
>> then it aligns nicely with passing under the Intake ~
>>
>> ORR ~ DeanB
>>
>>
>> On 31 Jul , 2020, at 7:03 PM, Rob wrote:
>>
>>> 7.5mm, thank you. The last time I did this the plastic tube was a good
>>> fit inside the hose, I ran it in 6" or so & used two clamps with no
>>> leaks. I was planning on doing this again.
>>>
>>> Rob
>>> vwrobb@gmail.com
>>>
>>>
>>> On Fri, Jul 31, 2020 at 3:30 PM Dennis Haynes
>>> <d23haynes57@hotmail.com>
>>> wrote:
>>>
>>>> At some point VW went to a 7.5mm ID hose in part to reduce reliance
>>>> on the clamps. For the firewall fitting it gets a bad rap. A more
>>>> common place to leak is where the hose attaches to the plastic tube
>>>> from the filter. Hose selection and clamp choice and installation is
>>>> extremely critical. Too lose and the hose slides off or leaks, too
>>>> tight and the plastic tube collapses especially after some heat. On
>>>> other vehicles that use this type of tube a sleeve goes inside to
>> support the tube from collapsing.
>>>>
>>>> Spring or crimp clamps are the best choice here.
>>>>
>>>> It is worth noting the OEM the hoses on the engine and outside the
>>>> compartment are different part numbers-construction. With the
>>>> aftermarket stuff we go from 10-15 year hoses to 2-5!
>>>>
>>>> Dennis
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: Vanagon Mailing List <vanagon@gerry.vanagon.com> On Behalf Of
>>>> Rob
>>>> Sent: Friday, July 31, 2020 4:59 PM
>>>> To: vanagon@GERRY.VANAGON.COM
>>>> Subject: Fuel hose size
>>>>
>>>> What size fuel hose do I need to replace the one from the firewall
>>>> plastic fitting to the engine?
>>>>
>>>> Rob
>>>> vwrobb@gmail.com
>>>>
>>
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