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looking at the engine from front it should be in the right valve cover. a hose comes from the pcv valve to throttle body.to replace it, just pull up on valve to release from rubber grommet. have a good day !!
The PCV valve (3) is mounted into the top/right side of the intake
1.The PCV valve (1) is sealed to the intake manifold with two
O-rings (2). 2.Remove PCV valve by rotating counter-clockwise 90 degrees
until locating tabs (3) have been freed. After tabs have cleared, pull valve
straight up from intake manifold.3.After valve is removed, check condition of
two valve O-rings (2).
The PCV valve can be located in several places. The most common location is in a rubber grommet in the valve cover. It can be installed in the middle of the hose connections, as well as installed directly in the intake manifold.
Once the PCV valve is located, make sure all the PCV system hoses are properly connected and that they have no breaks or cracks.
Remove the air cleaner and inspect the air and crankcase filters. Crankcase blowby can clog these with oil. Clean or replace such filters.
Oil in the air cleaner assembly indicates that the PCV valve or hoses are plugged.
Make sure you check these and replace the valve and clean the hoses and air cleaner assembly.
When the PCV valve and hose are in satisfactory condition and there is oil in the air cleaner assembly, perform a cylinder compression test to check for worn cylinders and piston rings.
The PCV valve is located in the valve cover on the passenger side of the vehicle. The valve is closer to the firewall than it is to the front of the engine. It has a hose attached to it and threads into the valve cover.
Nissan Scope Technician- 10+ years experience is Nissan dealership