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Not really. I think it's just a normal noise these cars make, as it came and went somewhat intermittently throughout my ownership and didn't change when i replaced the valve cover 6 months after the original post. I will say that if you hear the dolphin/chipmunk noises, especially under braking, that's a better sign of PCV failure in my experience. A shop actually damaged my (replaced) valve cover during an incorrectly-performed walnut blasting and I got those noises. Fortunately FCP covered it. I sold the car last April after putting 30k miles on it. Feel free to ask me any other questions you may have.
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