stealthbob Posted April 1, 2010 Share Posted April 1, 2010 I'm rebuilding a fuel/vac pump for a 54 Buick Roadmaster and have come across this issue of a white powder build up. There is also the accompanying pitting in the housing.What is this stuff?Dirty Fuel Chamber.pdfFuel dirt.pdf Link to comment Share on other sites More sharing options...
cobravii Posted April 1, 2010 Share Posted April 1, 2010 Youe need GUNK....It is what is used to properly clean carbs but will also work really well on the alluminium corrosion that you have. Link to comment Share on other sites More sharing options...
stealthbob Posted April 1, 2010 Author Share Posted April 1, 2010 I have it all cleaned...I just want to know what his stuff is made of.I'm shocked this car ran with all that inside. Link to comment Share on other sites More sharing options...
Fr. Buick Posted April 1, 2010 Share Posted April 1, 2010 I have seen it that bad and worse before on a friend's '50 Buick and my ownm '54. It cleans out easily enough, and does not seem to harm the pump in any permanent way.It looks like some strange reaction of the alloys in the pump to whatever contaminants are in the gas - water and otherwise.Just think how well it will work once it is all spiffy and clean!Doug Cook Link to comment Share on other sites More sharing options...
Mark Shaw Posted April 1, 2010 Share Posted April 1, 2010 Probably what is left from an oxidized rubber diaphragm.... Link to comment Share on other sites More sharing options...
HurstGN Posted April 1, 2010 Share Posted April 1, 2010 Could be from moisture in the gasoline too. With all the crap they add to gasoline today, they need an ingredients label on the pump:Ingredients:Gasoline - 64% (or less)Ethanol - 10%Water - 1%Misc. Inert ingredients (the crap we put in but we don't want you to know what it is)25% or more, depending on how much profit we want to make at any given moment in timeUnless you have a fuel filter problem, that's most likely corrosion related from water and alcohol in the fuel. Link to comment Share on other sites More sharing options...
stealthbob Posted April 1, 2010 Author Share Posted April 1, 2010 Yes there was some corrosion/pitting in the fuel chamber so likely thats it...the thing is the car was running fine on this pump before I took it apart. There was a filter after the pump so that protected the carb I guess. I was just wondering if it was debris from the "distilled" gas. The fuel system would empty after every use....I can only imagine how bad the fuel tank is :eek:Thanks all for the comment... Link to comment Share on other sites More sharing options...
pirate Posted April 1, 2010 Share Posted April 1, 2010 (edited) I am guessing the fuel tank is free of the corrosion being that is it made of steel. The fuel pump is aluminum and most likely corrosion from that aluminum is the reason for all that "white stuff". Maybe all of us should start to wonder if our fuel pumps are secretly corroding away inside from the acahol gasoline where we can't see it happening? Edited April 1, 2010 by pirate incomplete (see edit history) Link to comment Share on other sites More sharing options...
stealthbob Posted April 1, 2010 Author Share Posted April 1, 2010 I will be sure to update this thread regardless of what I find in the tank....It does look to be the corrosive nature of the fuel though.. Link to comment Share on other sites More sharing options...
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