KKloveIT

So when I was at the gas station filling up my RX 350 today, I accidentally lift the fuel nozzle up and saw the gasoline gushing down the fuel neck. This got me intrigued. Where the heck is the physical valve that is suppose to be at the opening of the fuel neck?

My previous vesicles were a Honda Accord and BMW 5 series. I remembered those 2 cars had some sort of a spring operated physical flap/valve that shuts the fuel neck and opens up when you push it with the fuel nozzle. If I were to lift the nozzle up during refueling the valve would have closed and gasoline would be everywhere.

That got me intrigued, without the valve what stops foreign substance from entering the fuel tank except the fuel filler cap? Is the cap alone enough?

oohpapi44

iTrader: (1)

As far as I can recall, it's was designed for two purposes and neither of which was to keep debris out. Can't think of any situation where debris would fall in unless it was intentional and if so, that little spring isn't going to stop it.

Think I remember hearing it was designed to keep fuel from spilling out in case of rollover and the second was to contain fumes. But i've seen numerous late model vehicles that do not have them any longer.

Flap or no flap, you lift the nozzle up while fueling, you're going to have gas everywhere regardless.