The PCV system is supposed to be a sealed system so it’s illegal to vent any part of it directly to the atmosphere. So if your PCV valve doesn't have it‘s hose connected, someone has fiddled and made your car unroadworthy by removing it
This won’t make the car run better or last longer
The PCV valve you show in your picture should be connected to the engine air intake (or to the engine air intake via a oil catch can as an update, if that is a worthy update… don’t know)…
@Fu Manchu made a post that went through the PCV valve mod below so probably worth reading that thread in its entirety (as it discusses the mods and likely has hose routing diagrams within)…
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However, as Holden does running updates, I‘d have thought the VF would have had any updates to the PCV system incorporated so I don’t think it would need any PCV mod. I’d guess there shouldn’t be any issue in the later VF V6 cars but not sure if that’s made clear in FU’s thread above.
Me, I don’t have a V6 so don’t know. It may be that you’re just worrying about an old issue impacting earlier models for no real reason. It may be that the PCV and chain issues may have been resolved in these later cars.
Yes, change your oil more frequently than the factory service manual recommends.
Many stick to or even stretch the factory 15,000km normal service interval. But they may be driving in city stop start traffic during the heat of summer which Holden themselves define as severe driving conditions (just like towing is severe driving). If driving in severe conditions Holden specifies a server driving service schedule which I think includes a 7,500km oil change interval.
But I’d change oil more frequently than the factory schedule for your driving conditions. If you do normal driving, change oil at maybe every 10,000kms and if you drive in hot city stop start conditions, change oil maybe every 5,000kms. That should give a more headroom than Holden allows. That way the engine intervals will stay nice and clean and operate better…
Just remember, over servicing simply increases running costs while under servicing can drastically increase repair costs due to avoidable failures.
Don’t ignore hints from your car as squeals, vibrations and other bad noises are simply your car telling you something is wrong… ignore them at your peril…