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cparman · 09-26-2008, 05:10 PM

The PCV valve was the very first emissions control device installed on cars back in the 50's. Yes they are necessary!! I have a breather in one valve cover that has a tube attached to the bottom of my air cleaner, so the engine is getting clean filtered air. The PCV is in the other valve cover. SO, the PCV draws air into the engine on one side, and thru the engine to the PCV valve which gets it vacuum from the carb clean filtered air to keep the engine crankcase unburned gas free, and ALSO makes sure that there is no pressure building in the engine, this will keep it from leaking oil from perfectly good gaskets. I see many cars at my shop with oil leaks, and one of the first things we do is to make sure that the PCV system is working. It is the culprit of a many a oil leak. YA NEED ONE

09-26-2008, 05:10 PM	#4
cparman sharp as a marble Join Date: Jan 2007 Location: atlantic beach,florida Posts: 1,082	Re: Are PCV's necessary? The PCV valve was the very first emissions control device installed on cars back in the 50's. Yes they are necessary!! I have a breather in one valve cover that has a tube attached to the bottom of my air cleaner, so the engine is getting clean filtered air. The PCV is in the other valve cover. SO, the PCV draws air into the engine on one side, and thru the engine to the PCV valve which gets it vacuum from the carb clean filtered air to keep the engine crankcase unburned gas free, and ALSO makes sure that there is no pressure building in the engine, this will keep it from leaking oil from perfectly good gaskets. I see many cars at my shop with oil leaks, and one of the first things we do is to make sure that the PCV system is working. It is the culprit of a many a oil leak. YA NEED ONE Last edited by cparman; 09-26-2008 at 05:11 PM.