If you are repairing an oil leak or need a replacement PCV valve, O'Reilly Auto Parts offers a selection of PCV valves, gaskets, seals, and PCV hoses for most vehicles. You can learn more about how to diagnose and replace a PCV valve with our helpful video. I replaced the valve cover gaskets on my 2007 6S Hatch V6 thought I would write up a DIY since I couldnt find one on here for the V6. For 2002-2003 Mazda Protege5 Valve Stem Seal Kit 76823MSTZ 2. Mazda 6 1st Generation (2002-2008) Engine / Suspension / Drivetrain 3.0 Valve Cover Gasket. New Listing Vacuum Switch Valve Solenoid for Mazda 626 Protege RX-8 (Fits: Mazda Protege5) Brand New: Unbranded. If you can hear the check ball moving inside the valve, it means that it is free and able to open and close as needed. Rocker & Valve Covers Rocker Arms & Parts Tappets & Lifters Valve Guides. It is often easy to test a PCV valve to determine if it is functioning properly by removing and shaking the valve. ![]() Over time, a clogged or malfunctioning PCV valve can cause increased oil consumption, poor fuel economy, rough idling, oil leaks, or an active Check Engine light. By regulating the flow of excess oil vapor through the crankcase, the PCV valve also helps prevent the buildup of oil pressure in the engine, which can cause excessive force on seals and gaskets which could otherwise cause a damaged seal or gasket and an oil leak. The recirculating of oil vapor through the PCV valve helps reduce harmful emissions and increases combustion efficiency. PCV valves are designed to remain closed to minimize oil loss through evaporation, and open with the rising force of oil vapor to reduce internal engine pressures. PCV valves are designed to direct oil vapor and excess pressure from the crankcase back into the intake manifold where it's burned off through the combustion process. ![]() The positive crankcase ventilation (PCV) valve is an engine component typically located on the engine valve cover or intake manifold.
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