Howdy Folks,
I have a 1993 Westfalia with a 2.5L gas motor and a 5 speed manual transmission.  Fairly regularly I get gas fumes in the cabin. There are no visible leaks.
Is the gas cap vented and therefore release fumes into the open driver's window?
Is there a breather/overflow hose that is subject to breaking or popping off?

Anyone know how to fix the issue?

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