New Generation N62 Engine Chapter 6 P.5
Course Contents/Background Material
© BMW AG, Service Training
- Tank ventilation
Optimum ventilation of the tank system ensures trouble-free
refuelling, and that no vacuum can develop during operation.
The ventilation system consists of:
- Two service vent valves (left/right 16)
- A filling ventilation valve (30)
- A hose to the fuel expansion tank (24)
- Two rollover valves in the fuel expansion tank (11+28)
- A service vent hose (13)
- An activated-carbon filter with hoses (9)
- A dust and spider filter (12)
Tank ventilation components
- Service vent (16):
The service vent valve (16) on the right side of the tank consists
of a float which locks the ventilation while fuel is being admitted
(ball valve).
The service vent valve (16) ensures that no fuel enters the venti-
lation pipe when the vehicle is on an incline. A simple ventilation
connection piece (16) is located in the left tank chamber.
Both service vent valves (16) ensure that no air cushions form in
the lower positions of the tank.
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