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Re: Are PCV's necessary?
Here is some interesting reading. Pretty much what everyone has said, but with a little more info. http://en.wikipedia.org/wiki/PCV_valve
Also, make sure that you install that PVC in the valve cover that has the baffle under it. If not, oil can come up thru the PVC valve.
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1997 GMC Sierra Ext
1965 Mustang
Last edited by 70GMCer; 09-27-2008 at 07:19 AM.
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