Fuel Tank Breather Problem
I am having some trouble with the breather system on my fuel tank and need some help on how to rectify it. I only have a single side fuel tank on my KVA and when I fill it up trapped air in the tank forces fuel up the main pipe and overflows everywhere. This problem would not make me very popular at filling stations and I am stumped on how to sort it out.
To give you an idea on how it is set up at the moment I have a separate breather pipe that runs to the inside of the cap (taken from the highest point of the tank itself). This then does not let air escape when the cap is shut. I have installed a breather at the rear of the tank over the weekend with a two way check valve inside. I had hoped this would help but when I filled the car up with fuel it entered the tank ok, and then trapped air forced it to overflow again.
Could anyone please advise me on what I can do to sort this out. Does anyone have a diagram of how the tank vents on their cars are done. I really need to get this sorted out. It overflowed when it was sat in the sun last week due the heat expansion. Any help would be most appreciated.