1968 – 1979 VW 1600 Transporter Fuel Tank Ventilation and Activated Carbon Filter Unit

There may be one or more vent pipes on the fuel tank to cope with expansion due to heat and to prevent spilage when the vehicle is parked at, or assumes, unusual angles. These pipes and rising vent tubes are partially enclosed in the rear vertical body panels on the latest models.

Where the market calls for it there is a filter unit of activated carbon which traps hydro carbon fumes evaporating from the petrol. This filter is incorporated in the fuel tank venting system and the container is mounted in the ceiling of the engine compartment at the right. It is automatically “rinsed” when the engine is running, by air which is fed to it from the fan housing. The fumes thus driven from the filter are carried by a hose into the air cleaner where they are fed to the engine.

1968 – 1979 VW 1600 Transporter Schematic Drawing of Fuel Tank Ventilation With Activated Carbon Filter Unit

1968 - 1979 VW 1600 Transporter Fuel Tank Ventilation Schematic

1. Expansion chamber (incorporated in fuel tank design)
2. Breather line
3. Pressure line from fan housing
4. Suction line from air cleaner
5. Crankcase breather hose

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