Fuel Tank Rollover Valve Assembly Check

Shake the fuel tank rollover valve assembly up and down to check the float inside the fuel tank rollover valve assembly is not seized.

Fig 1: Shaking Fuel Tank Rollover Valve Assembly Up And Down
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Obtain a container, which is full of water.
Invert the fuel tank rollover valve assembly, and submerge it slowly in the water while placing your fingers over the nozzle.
Check that no more air bubbles appears from the fuel tank rollover valve assembly, and withdraw it slowly.

Fig 2: Checking No More Air Bubbles Appears From Fuel Tank Rollover Assembly
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Open the fuel tank rollover valve assembly nozzle. If no water flows out from the nozzle aperture, the valve is normal. If water flows out, the float or spring inside the fuel tank rollover valve is defective. Replace the fuel tank rollover valve assembly.

Fig 3: Checking Fuel Tank Rollover Valve Assembly Nozzle
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.