The easiest way to replace the gas tank vent valve on 1994 BMW 325i is to replace the gas cap. The vent valve is attached to the gas cap and is easy to find through the dealerships or online.
the vent in your fuel tank is not working properly
No. The vent hose is under the tank
it is to allow air to enter the tank to replace the space that the gas was taking up.
I assume you are referring to the cap on the fuel tank. The cap has a vent hole so the tank will not create a vaccum as it delivers duel to the engine. If the tank is half-full or more, vibration caused by using the implement will casue the fuel to "splash" within the fuel tank and also "splash" out trhough the vent hole. Check the inside of the fuel cap to see if the diaphragm is worn or missing and replace the cap if necessary.
Fuel tank cap vent is plugged.
If the vent is on the top of the cap, it would indicate that something is causing back-pressure inside the tank. Get it serviced.
Clogged fuel tank vent. As the fuel is removed air must enter the tank or it will collapse. Can be nothing more than a defective fuel cap.
Yes you can get a high wind cap for the vent.
Sounds as if you have a blockage in the fuel tank vent. Leave the filler cap off and drive around. If all is ok then you have a blocked vent causing a vacuum in the tank
No, there should not be pressure in the gas tank when removing the gas cap. Pressure in the tank could indicate an issue with the evaporative emission control system, such as a clogged vent. If you notice pressure when removing the gas cap, it's recommended to have your vehicle inspected by a professional.
The radiator doesn't have a cap. The overflow reservoir tank has a cap instead. (Tan plastic tank on passenger side)