The PCV valve or Positive Crankcase Ventilation valve, is one of your vehicle’s oldest emission components and it remains to be one of the most beneficial to your car. Simply put, the OEM Honda PCV valve recycles crankcase emissions, therefore improving your car’s gas mileage. It reprocesses fuel that could still be of use to the engine. Also, PCV valves get rid of moisture, which is the cause of sludge formation at the walls of stock emission gas tubing. Because of the harsh environment surrounding the PCV valve, it is subjected to a lot of heat. This often causes premature wear and tear. Eventually the PCV valve would have to be replaced. If you do not replace a broken PCV valve immediately, it could cause concentrated hydrocarbons, water vapor, and carbon dioxide to form. This inevitably results to sludge, which would ultimately contribute to engine damage.
However, you will be surprised to know that despite all its important functions, the PCV Valve requires not much maintenance. The scheduled maintenance to replace a PCV valve is approximately every 30,000 to 50,000 miles, but in our modified cars, with higher compression, aggressive camshafts, etc., you can expect to replace the PCV every 20,000 miles and sometimes sooner.
Note: Depending on the vehicle, your PCV valve may be a different color and have a slightly different shape.