90 Quattro 20V (Canada) L5-2309cc 2.3L DOHC (7A) (1989)
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Rollover Valve: Description and Operation
A "gravity" valve is used in the line to the charcoal canister to prevent fuel from leaking out through the vapor recovery system if the vehicle is
overturned. The valve is located just above the fuel tank near the filler neck.
