Retaining

The valve closes again when the pressure returns within limits.

RETAINING

In particular vehicle operating conditions, a vacuum can be created inside the fuel tank due to the effect of:

• changes in temperature
• fuel consumption.

In this case, the function of the valve is to restore the pressure in the tank by admitting air.

A possible fault of this function may cause "sawing" or vehicle stoppage, because of the difficulty in supplying the electric pump.

This function is carried out directly by the goose-necked valve made directly on the fluorine-silicone rubber.

SEALING IN THE CASE OF OVERTURNING (ROLL-OVER)

This function is to prevent fuel from spilling from the tank if the vehicle is overturned or sloped heavily.

During normal operation of the vehicle (bends, acceleration, braking, etc.) the fuel is shaken and could spill to the canister.

The high degree of sensitivity of the roll-over prevents this from occurring.

The roll-over closing angle is below 33°.

REMOVAL/REFITTING

• Remove the fuel tank (see specific procedure).

1. Remove the multi-function valve complete with pipe from the fuel tank.

PIPE FROM PRESSURE PUMP TO FUEL MANIFOLD

REMOVAL/REFITTING

1. Remove the engine oil filler cap.
2. Slacken the fastening screws and remove the engine cover.
3. Refit the engine oil filler cap.

1. Slacken the screws and move aside the fuel return manifold pipe.