[f30fanboy]

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I filled up at my normal gas station, when done the gas nozzle caught the metal flap at the top of the filler neck and I had to rotate the nozzle to extract. When I looked down the filler neck I noticed the metal flap door does not fully cover the opening, it looks like an oval shape thin metal plate that leaves gap to the lower half of the opening. Is this normal? Mine is a N26 SULEV 2013 328i.

In my old beater bimmer this flap covered the whole opening, and was a solid metal door, this F30 one is more like a tin can switch in comparison.

[bcl0328]

mine covers whole hole. n20

[f30fanboy]

Originally Posted by bcl0328

mine covers whole hole. n20

Thanks for the info. The part# of the filler pipe for N20 and N26 are different(16117244035 and 16117270991), need to find another N26 to check. From the look of it, the N26 metal flap looks like a switch rather than a cover for the filler pipe opening. I now wonder if the N26 fuel tank is sealed(to achieve zero evaporative emission), and this switch opens up the tank during fillup?

[BavarianFanatic]

Originally Posted by f30fanboy

I now wonder if the N26 fuel tank is sealed(to achieve zero evaporative emission)

That's what the cap does. The flap's purpose is to slow the spillage of fuel during a rollover if the cap is missing. It probably doesn't cover the opening anymore because it got mangled when the nozzle got stuck.

[f30fanboy]

Originally Posted by BavarianFanatic

That's what the cap does. The flap's purpose is to slow the spillage of fuel during a rollover if the cap is missing. It probably doesn't cover the opening anymore because it got mangled when the nozzle got stuck.

Another colleague's N26 F30 has the same oval flap that does not cover the opening 100%, so hopefully things are OK. BTW, new Japanese cars usually don't have that flap, not sure if those cars can spill fuel during rollover.