Should a V8V PCV Valve Be Noisy?

[Percy Penguin]

I renewed the PCV valve on my 2006 4.3 V8V engine last week, as it's high mileage and I have no history of it ever being changed. Pure preventative maintenance as I have no symptoms or problems.

I bought an OEM Aston Martin part, but once fitted there was a strange noise (a sort of buzzing) coming from the new valve. I swopped back to old one, which continued to be silent. Okay, a faulty part I thought, so I bought another OEM valve from a different source - exactly the same buzzing noise on idle, which goes away when I refit the old one.

So now I'm confused. Is the PCV valve supposed to buzz, or have I just been unlucky in getting two faulty ones (perhaps a batch issue)? Or is my old silent valve faulty and not working at all?

I'd be really interested to know if your valves buzz, so to speak...

[V8V Quadcamboy]

Or was the original one you took of faulty as it didn't buzz? Don't know if it shoulda.

[Percy Penguin]

Yes, exactly - I don't now know if the original is at fault, or the new one(s).

If I could find out if the PCV valve is supposed to buzz/vibrate when it's working properly then I'd know. Can anyone help?

(It's the black round flat plastic thing sat near the air intake hose, above the thermostat.)

[kooky1976]

I stumbled across a YouTube channel (Redpants) earlier today who covered the PCV and he says a buzzing PCV means a fault.

[BiggaJ]

https://www.youtube.com/watch?v=Mrvae6FbY44

Worth watching if you haven't already, and then looking at this link to Redpants where a brief description is made ....

https://shop.redpants.lol/product/pcv-valve-v8/

Edited by BiggaJ on Wednesday 27th July 09:09

[Percy Penguin]

Thanks all for your help. In the end I bought a third (unbranded) PCV valve from eBay, which turned out to be identical to the OEM ones - all the same markings, dimensions, serial numbers, etc. That one was silent, like the original, so I think my conclusion is that I had two faulty parts (perhaps a batch quality issue). Anyway, all fixed now.