[T3] Update with a Bowl Full of Rust Flakes

[Dave Hall]

Well, it wasn't from a Type 34 so I'm sure it's Type 3.  

I think the owner had a '71 or '72, so there may have been some changes if
yours is early.  The reason he looked into the situation was that he was
having fuel starvation problems, and being a very thorough engineer had
researched the situation with his tank carefully.  The nozzle part was
sealing against the hole through the bottom of the cup, and looked as if it
had been that way since made.  Once the gap was opened up, which I think
involved rebrazing the return nozzle, it worked perfctly, and exactly as Jim
described.

I've never heard of repro or after-market tanks being made.

Are you saying there is only a single skin at the bottom of your tank - no
'cup'?



-----Original Message-----
From: type3-vwtype3.org-bounces at lists.vwtype3.org
[mailto:type3-vwtype3.org-bounces at lists.vwtype3.org] On Behalf Of SCS
Crewcab
Sent: 25 July 2011 02:01
To: type3 at vwtype3.org
Subject: Re: [T3] Update with a Bowl Full of Rust Flakes

Pardon me, Dave, but I have two FI tanks and they don't look anything like
that diagram. I think that may be a Type 34 only design.



On 7/24/2011 6:38 PM, Dave Hall wrote:
> You can see a diagram on this webpage, comparing the carb tank and the FI
> tank.
>   http://home.clara.net/hallvw/fuelsend.htm
>
> I've heard that all tanks from about '68 have the same internal cup, but
not
> the return nozzle, obviously, as only the FI models (ie most USA cars)
have
> the fuel return pipes.
>
> Dave.
> UK VW Type 3&4 Club
> ===================
>
> -----Original Message-----
> From: type3-vwtype3.org-bounces at lists.vwtype3.org
> [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org] On Behalf Of Jim
Adney
> Sent: 24 July 2011 02:57
> To: type3 at vwtype3.org
> Subject: Re: [T3] Update with a Bowl Full of Rust Flakes
>
> On 23 Jul 2011 at 18:46, SCS Crewcab wrote:
>
>> What passages are you referring to?
> The FI tank has a sort of "cup" welded to the inside of the tank.
> That cup has a channel which leads under it, to the return line port.
> Returning fuel drags fuel from the main part of the tank thru that channel
> and into the "cup." So, when the tank is close to empty, the "cup" will
> remain full.
>
> In essense, this utilizes the return flow of the FI pump to scavenge gas
> from the main compartment and put it into the cup that the pump draws
from.
>
> If that small passage under the cup is blocked, the only way for gas to
get
> into the cup and to the pump is over the top of the cup. This means that
> once the tank is down to about 3/8 full, the pump will run out of gas.
>
> It's a system that works really well, unless you mess it up.
>
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
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