[T3] fuel tank leak

Jim Adney jadney at vwtype3.org
Mon Jul 4 06:57:23 PDT 2011

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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