gas tank filler cap
hi i have a question, should the gas cap be vented, when i remove the cap, it is under pressure, lots, so much that if the tank is 3/4 full if i take off gas sprays out and i get soaked, cap has a vent in it which allows air into the tank but not out. is this correct, its a 67 ranchero . i also replaced gauge sending unit, no leaks, untill it sits in shop for a day, air pressure builds up in tank then drip drip drip grrrrrrrrr any ideas,??????
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