When it comes to the emission control devices that you can install in your Mercury, you can always trust on us! We carry quality-made emission-control mechanisms such as the Mercury PCV valve that is guaranteed to perform reliably once installed in your Mercury. The PCV valve is the device that effectively routes unburned crankcase blow-by gases into the intake manifold where they can be re-burned again. Aside from eliminating the crankcase emissions that is a source of air pollution, the constant movement of the air through the crankcase helps remove the moisture which may cause sludge formation. Thanks to this beneficial operation that the part performs in the system, it effectively extends the life of the oil and the engine. The Mercury PCV valve that you can get from this site will typically connect the crankcase to the intake manifold from a certain location, more or less opposite the breather connection. Other locations includes the opposite valve cover which the breather tube connects to a V engine, as well as the valve cover, though in some engines the valve location is far from the cover. However, no matter what the location is, one thing remains for sure - the Mercury PCV valve that you can have in your Mercury will prove as an effective emission-control device. The PCV valve is often considered as one of the oldest emission control parts which are out in the market. It is but proper to extend the best maintenance procedures on the part in your auto. Replace the stock one once you think it has already been damaged or is starting to fail. This part requires little maintenance and the replacement will depend on the specifications of the manufacturer. When the time comes that you need to get a new Mercury PCV valve, visit our site and we will help you anytime!