volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Sensors and Switches - Fuel Delivery and Air Induction > < Rollover Valve, Fuel Tank|Locations|Page 4857
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in only one direction. This one-way operation prevents raw fuel from flowing out of the fuel tank into the charcoal canister in the event of a vehicle
rollover.

TESTING

Rollover/Gravity Valve (typical)

-

Remove the valve from the fuel filler neck by uncliping it and pulling it up out of the filler neck.

Rollover/Gravity Valve (typical)

-

Hold the valve "LEVEL" and blow air through the inlet.

^

Air SHOULD pass freely.

-

"Tilt" the valve 45° or more and blow air through the inlet.

^

Air SHOULD NOT pass.

-

If the valve fails either test replace it.

Sensors and Switches - Fuel Delivery and Air Induction > < Rollover Valve, Fuel Tank|Locations|Page 4857