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Old 06-06-2003, 09:17 PM
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Post Gas Tank Back Flow

I have a 30 Ford Tudor with saddle bag tanks. The filler neck is mounted to the rear of the car with a rise and fall over the rear axle and then a rise up at the back of the car. The tank is real slow to fill up because of the hump over the rear axle. The problem that is puzzling me is when the car gets hot I get back pressure out the filler tube. Gas is pushed out, up to a half gallon or so with only a 3/4 full tank. This only occurs when the outside tempture is over 90 degrees. I assume this is a problem with the vent, but I wanted to get some feedback before I start tearing out the floor boards. I am considering moving a side running board filler neck so I can get rid of the almost trap like filler I currently have. Thanks for any help I can get.

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Old 06-07-2003, 01:33 PM
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Do you have a vented cap on it right now?
If you do then you will need a aditional vent tube.
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Old 06-11-2003, 12:52 PM
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hey! hows the biggest little **** hole in the world? er, i mean my home town? lived there long enough to hate the place yet?
i would agree with needing a vent tube all the way from the tank, up along the neck to the opening to let the pressure get by the gooseneck. chris at Rod Bods off rock blvd could help you to. he builds brand new metal 32's. you can just attach a rubber gas line to the metal vent tube on the tank as long as it's higher than the opening i think youll be fine. give my regards to sparks. haha
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