PCV valve chatters at idle

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austinado16

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Todd
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1990 w/307k miles on the clock
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5.7L TBI/4L60/3.42's
I replaced what was probably the original PCV valve because it had lost it's check-valve/one-way function. Installed a new one (supposedly for my application) from NAPA. It chatters at idle. I don't recall if the old one did this or not.

Did I get a POS valve, is this normal for them......or what?

Thanks!

EDIT No.1: Just did some quick online reading. Seems to be a common problem when using aftermarket PCV's. Fixed by installing OEM versions. One suggestion was to use the one rated for a '69 Camaro w/ 396, Purolator #PV736. I've just ordered an AC-Delco and it should be here later today, so I'll report back.

EDIT No.2: Just installed the new AC-Delco PCV along with a new grommet, and there's no more chattering. Have a little road trip coming up, so we'll see how it does after that.
 
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bucket

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Yep, I always spend the extra 63 cents and get an AC Delco valve.
 

austinado16

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Central Coast, CA
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Todd
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1990 w/307k miles on the clock
Truck Model
GMC V1500 Suburban SLE
Engine Size
5.7L TBI/4L60/3.42's
Ya, no sh!t. This OEM valve was $5.63. The days of any sort of quality in the aftermarket are loooooong gone and I need to embrace that. I actually know better, but figured, 'how could you F up a PCV valve.
 

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