Rollover Valve: Testing and Inspection

Two-Way Valve:

NOTE: To avoid breathing fuel vapors, do not suck on any evaporative emission control hoses.

1. Blow through the canister side of the valve. Air should pass with slight resistance. If not replace valve.
2. Blow through the fuel tank side of the valve. Air should pass with slight resistance. If not replace valve.
3. Visually inspect the valve and replace if cracks or other problems are detected.