swapping the PCV valve for updated one?
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TECH Apprentice
Joined: Jan 2005
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Basic tech question about swapping the PCV valve for updated one I was reading some threads on reducing oil consumption, and one of the most common suggestions was upgrading the PCV valve to the one for the newer LSx engines. GM part #12572717. I picked this up yesterday, as the car recently hit 30k so I wanted to get a new one anyways. Is the design of this new one a lot different? I know it's an updated version...but it just seems too different. It's much lighter, and there's really no "valve" inside at all. There's really nothing inside it at all, in fact you can look right through it. 
Like if you shake the original you can feel it rattling inside and this one doesn't at all. Is the part the wrong one or defective or does this sound right?
Like if you shake the original you can feel it rattling inside and this one doesn't at all. Is the part the wrong one or defective or does this sound right? 
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TECH Apprentice
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Yeah, that's probably a good part of it. Mine isn't out of control, but it is definitly noticeable and like I said, I was doing some maintainance and figured it was a good time to replace it anyway since it had 30k on it and I was changing the oil anyway which made it easier to compare any improvement. Although I've wondered if the German Castrol is helping or hurting the situation.
Thanks for the reassurance 777! People said the new design was "fixed orifice" but I was unsure if that's what they meant because it seemed like a little too much orifice compared to the factory one.
Thanks for the reassurance 777! People said the new design was "fixed orifice" but I was unsure if that's what they meant because it seemed like a little too much orifice compared to the factory one.
I've heard that on higher hp engine it's not a good idea. Since the hole is soo small it builds up too much pressure in the crank case and will blow out the seals. Could just be speculation though.
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My car is otherwise factory. Actually have a lid and GMMG sitting in a box going on next week but after that the next few mods will be suspension related so that's about as modifed as I planned to go for a while. Should be ok.
