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Re: [T3] Gas tank overflow hoses

On 7 Oct 2004 at 8:49, Jim Adney wrote:

> I recently acquired several gas tank overflow hoses from various sources. 

I've posted a photo of the 4 hoses at:


My earlier post was from memory, and I'm afraid that I mixed up some of the 
results. I apologize for my errors here. Please accept these new descriptions 
as accurate. Note that the NOS VW part PASSED the test.  

All of these hoses were just immersed about 3/4 of the way into the kerosene. 
If you look at the photos of the two hoses that failed you can see where the 
kerosene, and the swelling, stopped.

Lower Left:

1) New part, marked with the VW logo, 311 201 179B (not a real VW number), but  
no molder's logo. Different surface finish than the others I have ever seen. 
This part failed; the immersed portion swelled up to about double its normal 
diameter. This part came from ISP West; I emailed them about the odd part # but 
got no reply. I have no way of knowing who actually made this part, but if 
someone sells you a part with this odd part # on it you should just return it 
for a refund and let them know why. I emailed them again, but they have been 

Upper Left:

2) Old used (appears to be genuine VW) part from one of my cars, marked with 
the VW logo, 311 201 179A, and the usual triangular molders logo. This part had 
clearly shrunk in service and was SMALLER than normal and extremely hard at the 
beginning of the test. At the end of the test it was swollen. Failed.   

Lower Right:  

3) New reproduction part from type 3 Konny in Germany, marked 311 201 179C, no 
VW logo, T3K (Type 3 Konny) logo. Passed, no effect on the rubber.

Upper Right:  

4) NOS VW 311 201 179A, appears to be genuine, since it has the usual 
triangular maker's logo on it, in addition to the VW logo and part #. Passed, 
no effect on the rubber.  

I currently have 3 more overflow hoses soaking in kerosene and so far none of 
them are showing any effects, so they appear to be good.

If any of you have overflow hoses that you have bought and installed in the 
past year or so, I suggest that you go out and just reach under the fender and 
feel the part. If it feels larger in the middle than at the ends, with the 
middle feeling quite soft and spongy, then you have one which is made from the 
wrong rubber compound.

If you have one of these bad ones, please let us all know where you got it, and 
anything else you know about it. Also tell us whether yours is an early hose 
(bayonnet gas cap) or late hose (screw type gas cap.)


Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA

List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org

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