Does anyone know what size the O-ring is on the PCV valve for a 2006 9-3 B207R? How many MM? The PCV valve (12797658) has been discontinued for years, so I was thinking I could just clean it and the little screen inside it with some carb cleaner and then put a new O-ring on. Hope to do this when I take the throttle body off and clean that too, but won't get to it until next month. Thanks.