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Old 08-06-2019, 09:15 AM   #6
40 Deluxe
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Join Date: May 2010
Location: now Kuna, Idaho
Posts: 3,779
Default Re: Gas tank cap venting?

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Quote:
Originally Posted by History View Post
I assume the gas tank cap is designed to vent from internal pressure and as the gas heats up it expands,,,,,,,,,. I also assume it's designed to let air in to equalize pressure as the gas gets cold and condenses? How could I check my cap before I put gasoline in as my tank is bone dry at the moment? Should I be able to hear air escaping if I pressurized the tank slightly?

I'd like to not have to wonder later.
The cap also has to be vented so air can enter to replace the gas used as you drive, or the carb would soon run dry!
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