There is a component on most modern vehicles known as a PCV (positive crankcase ventilation) valve, which is part of the emission control system. It is a one-way valve that helps remove gases from the inside of the crankcase of your Nissan Pathfinder engine. By removing these gases, the PCV valve helps the engine operate more efficiently, thereby reducing exhaust emissions. You can easily replace the PCV valve on your Pathfinder and save yourself time and money in the process.
Tools Used: Socket set and ratchet
Replace PCV Valve
Park the Pathfinder and set the parking brake. Lift the hood and prop it open.
Locate the PCV valve mounted on the intake manifold on the top of the engine.
Disconnect the hose from the PCV valve. Remove the valve by turning it counterclockwise with a socket wrench.
Thread the new PCV valve into the manifold by hand. Tighten the valve firmly by turning it clockwise with the socket.
Attach the vacuum hose to the valve. Close the hood.
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