To ensure the continuous cooling of air inside the crankshaft of Honda gasoline internal combustion, the Honda PVC valve present in it must be of reliable quality. Honda Positive Crankcase Ventilation valve, or commonly referred to as PVC valve, is a part of the vehicle's PVC system which works to divert a small percentage of air collected by the air cleaner to crankcase. PVC system is simply an open system that flushes the contaminants from the crankcase to the combustion chamber to provide cooler outside air. By using the breather before the air is drawn back in to the intake tact again, the PVC system is able to do its job efficiently. The Honda PVC valve, in particular, is just a simple part of the PVC system which performs a very critical and complicated function. When the engine is not running, the PVC system is exposed to the intake manifold. But when the engine is running, the tapered end of the cone is drawn towards the opening in the PVC valve to restrict the opening of the PVC. The Honda PVC valve's function starts when the intake manifold's pressure becomes higher than that of the crankcase. The PVC valve closes to prevent reversal of the exhausted air back into the crankcase again. This function explains the 'positive' from the acronym PVC that is synonymous to 'one-way.' This motion assures that as the engine load increases, the vacuum on the valve decreases, so the entire system is allowed to have proper operation. The critical task of Honda PVC valve and the entire PVC system requires regular cleaning. Otherwise, the air flow will be insufficient. A damage PVC valve might eventually cause damage to the entire engine system. So if ever you have a problem with your PVC valve, don't hesitate to change them immediately with the finest Honda PVC valve found right here at our online auto parts and accessory store.