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Originally Posted by Michael C Henry
are all PCV valves pretty much the same? If they are then why so many different applications? A lot of the valves look the same ,if they wern't still in the package you couldn't tell one from another.. Some have addon plumbing. Is there really a difference or just find one that fits?
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If you check the application guide for a specific year, you'll usually find that all V8 engines of a certain make used the same PCV valve; 6 cyl engines usually used a different one. This is true for both Ford and Chevies, so the difference is mainly what will fit; I'd personally stay somewhere near the same year as the engine you have in case things such as computers etc. affect them. Don't know that they would, but just to be safe...
JMHO,
Dan