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silly question; how do ya get the gas cap to seal on my `57? for a while after i fill it, got gas all over the tail light area. new cap, plus i put a piece of riubber inside the cap for a tighter seal. signed, puzzled.
 

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Is the gas expanding in this heat ? if you "overfill" the tank this will happen sometimes ,,did it happen in the cooler weather ? try keeping it at 3/4 of a tank and see what happens -----:cool:
 

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1957 gas cap should have a air vent in it so pressure shouldn`t be a problem. Just don`t fill it all the way to the brim. The baffle may help you some if you install on of them in the neck.
Terry
 

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I put one of the check valves in the hose connections between the 2 fill pipes going to the tank. It has prevented gas splashing back out when you fill the tank.
Several of the suppliers offer them.


Tom
 

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I put one of the check valves in the hose connections between the 2 fill pipes going to the tank. It has prevented gas splashing back out when you fill the tank.
Several of the suppliers offer them.


Tom
I have one of those in my 56 and it works pretty good too:D Got mine at Ecklers... Later, Dave
 

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The air vent in the 57 filler tube is a "closed loop" kind of thing - it allows the fuel to flow down the tube without "burping", much like the handle on a milk jug. I wouldn't expect it to prevent pressure buildup. A little oil on the gasket material in the cap might help it keep a better seal.
Don
 

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The air vent in the 57 filler tube is a "closed loop" kind of thing - it allows the fuel to flow down the tube without "burping", much like the handle on a milk jug. I wouldn't expect it to prevent pressure buildup.
That part is true, but on a 57 it is supposed to have a vented cap that does prevent pressure. If not the gas tank will buckle. I learned that one by first hand experience.
Terry
 
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