snot

backrodebob

Member
this is coming out of my gas tank, can anyone tell me what it is and what causes it?
 

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Someone might have used a sealer at one time and the ethanol in todays gas is breaking it down. I had a similar issue in my Model A, but the goo that came out of my tank was white.
 
One time I had stuff come out of the tank that looked like orange jello. Cleaned the tank and has been good since. I was told it probably came from the refinery but who really knows??
 
You don't mention the texture of the "snot". If it is it like silicone, it is possible that product was used at one time to seal the sender unit? The PO of my '46 Coupe used red rubber for the fuel sender gasket, and chunks of it ended up in the tank after being degraded by the fuel coming into contact with it.
 

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Fuel will soften silicone. Never use it on any fuel related item. Not saying that is what the snot is, but adding info.
 
It depends on the type of silicone. Fluorosilicone elastomer is used for fuel system o-rings for aviation applications.

Some fuels will grow a type of fungus and especially if water is present. It's generally diesel or jet fuel but the stuff could have been in a tank that had a change of contents but was not well flushed. Alcohol in modern fuels will absorb water and can foster microbial growth as well. Adding alcohol to motor fuel was not a real good idea but it's no surprise that anything can happen with a government like ours. Making sense is irrelevant to them.
 
just a thought check the hose on the filler pipe might be a high silicone product and its breaking down, fuel loves silicone and ethanol fuels love it more only rubber products should be used around fuel and always make sure its rated as alcohol [ethanol] proof
 
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