General Fuel Cap Pressure?

[Sammii]

Hiya guys, ive recently developed slight pressure everytime i open my fuel cap.

im assuming this isnt normal, where is the tank vent? is it on the cap? on the tank? pipes? etc?

thanks

 

[nikcoleman]

Do you mean a whoosh when you unlock it? if so, normal in my experience and if you've run low after a long run then it's really a quite unnerving whoooooosssh as you unscrew it. Every Cinq I've had (5) and every Sei (3) the same.

 

[RuiG]

Just saw this thread and seems logical to post my question here.

Usually when I fill the tank I get the same "wosh" sound... so far normal...

... I usually fill it until I get the first click from the pump pistol. This time around (and the one before) I got the first click, then filled it a bit more until I got a second click (I could see the gas on the bottom of the filling tubbing).

Both this last times I got a smell of gas inside the car, and some of it came out of the breather/filling cap (the seal is getting old). I see no dripping on the tank or tubes underneath the car.

So am I losing gas from another place or do I have to fill it only until the first click?

Many thanks.

 

[AppleSei]

Slight pressure is normal, its basic science to need pressure regarding any type of fuel system, seen a few threads recently posted by OP with potential problems, we dont want another ronnie, enjoy your car and stop worrying all the time.

Reg. Rui G first click from pump usually means the tank is just about full, the majority of british i imagine go slightly beyond this just to round the amount to pay to an even number