Venting issue leading to the tank changing its size?

This is completely wild ass speculation and hypothesis here, but let's say that there was a tank venting issue that makes your tank bulge. You then pump in a bunch of gas into this bulging tank. The cool gas makes the metal tank contract and suddenly the bulging tank side pops back to its original smaller shape, making it too small to hold all the gas you have just pumped in....

Yeah, I know. It's a stretch. But it's the only thing I can think of that makes sense.

Do you ever hear noises that could be the gas tank changing shape?

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition