As with almost every part on the 63 car, during the 63 model year the gas cap changed to a different design. The first cap was, I believe, vented to the atmosphere, the second was not.
I have an original on my early car, but it doesn't give me any hints of the internal construction. They're pretty rare and expensive, so I don't want to mess with it, so, does anyone know if the original cap p/n 3820865 had any sort of spring or other pressure regulator inside it, or was it just always open to free vapor escape to the atmosphere ?
Thanks,
I have an original on my early car, but it doesn't give me any hints of the internal construction. They're pretty rare and expensive, so I don't want to mess with it, so, does anyone know if the original cap p/n 3820865 had any sort of spring or other pressure regulator inside it, or was it just always open to free vapor escape to the atmosphere ?
Thanks,
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