|The PCV Valve.|
|The PCV valve and hose.|
When the PCV valve starts to fail, you may notice more white fumes coming out of your exhaust pipe. Replacing the PCV is very simple and they are very cheap. The old valve is removed and replaced with the new valve. A PCV valve that is not working properly will steadily decrease your gas mileage and destroy the engine itself if it is neglected. PCV valves should be replaced or checked every 30,000 miles.