Actually, it has quite a lot to do with it. The intended airflow is for
clean air (from inside the air filter) to ENTER through the filler neck,
replacing the crankcase vapors drawn OUT by the PCV - Positive Crankcase
Ventilation. Earlier cars with a road-draft tube didn't need the clean air
entry point on the filler neck, as the crankcase vapors were merely vented
towards the road under the car, clean air never entered the crankcase.
Jon Arzt
>From: Jay_Laifman@countrywide.com
>There seems to be some confusion here. The oil filler neck has nothing to
>do with the PCV. The oil filler neck of the later Alpines with the outlet
>port goes to breathers on the two air cleaners.
>
>The PCV that mounts to the intake manifold is connected to a tube on the
>side plate. Earlier Alpines without the PCV had a side plate on which the
>tube pointed down to the ground, rather than up to the PCV.
>
>Jay
>
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