Are your ltft plus 22?

If so you still have a large vacuum leak and that'll be the source of the noise

Eta I just listened to the first clip you have air in and it sounds likely to be the pcv rattling too

Thanks dingg the hose is very loose is that normal?

 Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

I can't visualise which that one is tbh.

What I would do -

Remove the pcv - its 2 small star shaped retaining screws , give it a blow through with some wd40 , before you put it back tape up the hose joint to make sure that o ring potential issue is circumvented (I mean clip the joint together in the correct position and then apply tape) refix the pcv and see how it sounds.it may take a while for the noise to dissappear ie a couple of hundred miles or so so dont be alarmed if its still noisy.
My pcv had the very same sound at one time so I suspect this may be your issue.

Are your trims plus 22?
If so you most likely have air ingress and it certainly sounds like you do with that hissing the join I mention is a weak point in the system

Good luck

hi dingg - sorry to go over old ground but are you saying before you cleaned and tidied your pcv it sounded exactly the same as mine? Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

Yes.
You but you still have never answered the q.
Are your ltft showing plus 22?
If so the most likely cause is a large vacuum leak ds of the maf sensor.
If so the most likely place is the pcv connection point.
Sort this out and all your problems will be gone. 👍

Sorry about the grammar but I've had a few and posting on phone

Ok just popped out now to do as you said made 0 difference made a couple of videos looking around the back of the engine off and the front when on if that makes things any clearer?




Any thoughts? Cheers Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

With trims that positive you are most likely pulling in a vast amount of unmetered air somewhere.thatcould explain the noise too.

If you can't manage to find it take it to someone with smoke test equipment.

that's my next play its booked in on Friday ... Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

Hope you get to the bottom of it

Ok thought I’d better update nobody likes a post which is not finished

So had my mate round who’s a bmw mechanic of 20years. He borrowed a smoke tester and there were two leaks one tiny one from the loose solid plastic pipe I put a video of and then from the pcv it was leaking all out the top of the circle (not loads but a bit. Taped it up to test it was better and he then listened and told me the noise was a knackered alternator... what are the chances
Of everything going wrong as I change one little intake duct. Going to order a denso from Dan Monday I’m off all week so should have a go at fitting doesn’t look too evil and will update... Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

Just to confirm after changing the alt and the pcv (greats fun job the alt) the noise is gone and my ltft at down to 10 and 5 and I thinking that due to the leaking brake booster hose but accidentally got the wrong side through so hopefully can have it good as gold then.

Cheers for the suggestions Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF