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Re: [T3] Playing with the fuel tank today.


On 4 Jan 2006 at 6:49, David wrote:

> What effect is leaving this only coating on the tank gonna have long term?
> Will the gas eventually break down the coating?

I don't think gas has any effect on this coating (it's actually more 
of a chemical reaction than a coating) at all.

> I don't know, I'm only asking...I would feel more comfortable following
> through with por-15's gas tank sealer as a final coat because that is what
> is designed for and I would trust it more that just the metal ready
> alone......you've gone thru all the effort to get this far, follow through
> with the treatment as designed......once you carefully apply the sealer and
> it dries, then I would worry no more about it!

If the tank was just a simple tank with only large inlets and 
outlets, then I might agree with you, but it's not. There are small 
openings which need to stay open, and there is a sort of cup 
structure spot welded to the bottom with small passages around it 
that must stay open if the tank is to work properly.

In addition, any coating like this is likely to start to peel off 
eventually and cause more problems than it solves. Keep in mind that 
the OEM tanks are not finished inside other than with a phosphate 
reactive coating. Those tanks will last forever, provided water is 
not allowed to accumulate in them.

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

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