The fact that your Cadillac is composed of so many parts, some of which are no longer familiar to you. Take for instance the PCV valve, which even its actual figure is still unknown to you. The PCV valve or known as the positive crankcase ventilation is a part of the engine assembly that removes excess combustion gases through the usage of vacuum lines plugged into it. This part is then connected by a hose to the intake manifold and there is also a second hose in the middle of the air cleaner and crankcase that gives off fresh air to aid flush the vapors away of the crankcase. Moreover, the PCV valve like the Cadillac PCV valve is spring-loaded that contains a detailed orifice size specially made in order to limit the amount of air that comes from the crankcase down to the intake manifold. This part is especially helpful given the fact that air drawn through the valve that comes from the crankcase possesses a receptiveness result on the fuel mixture. And because of this, the air flow that enters the valve must be proscribed within certain limits. When the part is not moving, air flow is condensed since there is a very minimal blowby that is formed. But in the event when the engine is cruising and vacuum is high, the airflow that goes through the PCV valve is at a highest level in order to cleanse the blowby vapors from the crankcase. Like any other part, the Cadillac PCV valve also needs to be regularly maintained and inspected to preserve its function. Never delay replacement when the times calls for it since at the end, you might end up regretting your action. For replacement, you can order your part here at our site if you don't want to be stress out by buying your product from your neighboring stores.