The tank is installed under the body floor and secured with two clamps 17 to the body brackets. Rubber gaskets are placed under the clamps. Filler pipe 14 is led out into a niche in the right rear wing and is closed with a sealed plastic plug 12. The plug has a tightening torque limiter: on some cars, a lock may be installed in the plug. The filler neck is connected to the tank branch pipe with a hose made of gasoline-resistant rubber. To prevent fuel leakage during refueling, the upper part of the filler pipe is connected to the tank branch pipe with a hose 15, through which air is displaced during refueling. The inner end of the branch pipe in the tank is located at a certain level, as a result of which filling the tank with fuel stops when the fuel level reaches the inner end of the branch pipe. Inside the filler pipe there is a check valve that prevents fuel leakage. To increase rigidity and reduce the possibility of fuel vibration when the car is moving, the tank has two partitions. Between the partitions there is a float of the fuel level indicator. Sensor 9 of the indicator in assembly with the fuel intake pipe and the fuel drain pipe is attached to the tank through a gasket. The fuel intake pipe has a mesh filter.
Two drainage tubes are installed in the fuel tank, inserted one into the other and having a common outlet in the branch pipe, which is connected to the separator 10 gasoline vapors. The capacity of the separator is 3 liters. Gasoline vapors, condensing in the separator, drain back into the tank. The ends of the drainage tubes in the tank are located on the right and left sides in order to prevent fuel leakage when the car is fastened and turned.
(The text is copied from the online resource: VAZBOOK.ru)