[T3] fuel tank leak

[crash 69]

I do have POR 15, but I didn't consider it for this application.  Thanks for
the idea.

On Tue, Jul 5, 2011 at 8:32 PM, Keith Park <topnotch at nycap.rr.com> wrote:

> You CAN assemble it with POR 15, that stuff will seal small pinholes and
> leaks, but you will NEVER get it apart again!
>
> Keith
>
>
> Top Notch Restorations
> topnotch at nycap.rr.com
> http://www.a383ina68.addr.com/radiorest/main.htm
> 71 Squareback "Hothe"
> 65 Notchback "El Baja Rojo"
> 65 Squareback "Eggcrate"
> 87 golf "Winterat"
> 93 RX7 "Redstur"
>
>
> -----Original Message-----
> From: type3-vwtype3.org-bounces at lists.vwtype3.org
> [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org] On Behalf Of Dave
> Hall
> Sent: Tuesday, July 05, 2011 5:45 AM
> To: type3 at vwtype3.org
> Subject: Re: [T3] fuel tank leak
>
>
> It sounds as if that red fibre washer is what you should be using between
> the nut and the outer side of the flange.  I would guess the sock crush
> washer sghould be sealing the tank outlet to the outlet pipe flange, and
> the
> fibre washer spreads to stop any seepage from going out along the outlet
> pipe or up the threads of the nut.
>
> I've heard that pin-holes in a tank can be sealed by rubbing bar soap on
> them - maybe you can try something like that here - it probably won't have
> your engine blowing bubbles like Herbie did!
>
>
> 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 crash 69
> Sent: 04 July 2011 15:36
> To: type3 at vwtype3.org
> Subject: Re: [T3] fuel tank leak
>
> I see.
>
> The filter flange is crushed VERY tightly on the tank nipple (good).  So
> much so that it would take a tool used with some force to get it off.
>  (This
> is the new, german filter I installed a few days ago.)  I have not wanted
> to
> do this, fearing I will ruin the smooth outer surface of the filter flange
> (it looks very good).  Therefore, I think the metal to metal seal is good.
>  It certainly looks like they've "mated" together well.  Then, I've been
> assembling it with the "red" o ring seal that came with the filter.  I'm
> locating the o ring between the aluminum filter flange and the steel outlet
> pipe flange.  The red seal is flat and fairly hard, not like a rubber o
> ring.  There is definitely fuel getting past this (why?), since it's coming
> out the bottom of the hole in the big nut.
>
> The outlet pipe flange is smooth, straight and there are absolutely no
> imperfections in the factory attachment to the pipe. You're right about the
> tight threads.  I did put some oil on there several days ago and it's been
> working much better.  I've had it off and on now several times, after each
> leaking "event".
>
> Happy 4th!!
>
>
>
> On Mon, Jul 4, 2011 at 8:57 AM, Jim Adney <jadney at vwtype3.org> wrote:
>
> > On 3 Jul 2011 at 18:49, crash 69 wrote:
> >
> > > So you're saying the tube flange should be tight to the big nut,
> > > with nothing in between.  The reason I'm asking this again is
> > > because of the parts diagram that we saw earlier showing the gasket
> > > between these two surfaces.
> >
> > Okay, looks like I've been wrong about this from the beginning. That
> > "gasket" sits between the outlet tube flange and the nut, so it can't
> > have anything to do with sealing. It must just be an anti-friction
> > washer to allow the nut to turn without turning the outlet pipe. That
> > means that the filter flange must be able to deform enough to create a
> > leak-tite metal-to-metal seal.
> >
> > You should check the filter flange to make sure it's been crushed
> > smooth enough to seal, and check the faces of the tank nipple and
> > outlet pipe flange to make sure they are clean and smooth. I also
> > remember that those nuts tend to be VERY tight. Oiling the threads
> > might help.
> >
> > --
> > *******************************
> > Jim Adney, jadney at vwtype3.org
> > Madison, Wisconsin, USA
> > *******************************
> >
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