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Has anyone found a cure for when you are filling up with the large fuel nozzles to keep the fuel from spitting back and running down the side of the truck. The main problem is that they hose's are made for 4 inch open fuel tanks found on med/hvy trucks so they flow double the volume of a standard hose.
 

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I think you can get an after market filler neck, might want to do a search?
 

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Diesel foams so much there may not be a cure except a 4" filler.
 

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The LB7 fill tube is actually one tube inside the other, the fuel flows down a smaller restrictive center tube and the fumes are vented around the outside of the inner tube to the top. The fill tube looks big but it's not inside where the fuel flows.

Transfer flow has a kit that you remove the inner tube and run a new vent hose seperate from the fill tube, I have one and it works but you still have to go on the slow setting on the big pumps since they can pump at a lot of GPM.

Here's a link to Transfer Flow that sells the kit's, the prices went up some.

http://transferflow.com/html/gm_fillneck_kits.html


DD

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