I want to replace my PVC valve but I don't know how. Does anyone know where I can find the instructions and the location of the PVC valve?
Thanks all!

 

The PVC valve is located almost dead center in the rear of the engine, just to the left of the throttle cables. The easiest way to change it is to take the support bolt for the vacuum line off, and then detach the tubing and PCV valve from the engine. Takes about 3 minutes. BTW, part number for a Purulator one is PV1058 I believe.

 

The correct designation is PCV valve. PCV = Positive Crankcase Ventilation. This is a pollution control device, and it is a good one because it is inexpensive, seldom fails, and does not detract from engine power.

Are you certain your PCV valve is bad? In my experience many PCV valves last for the life of the car.

The PCV valve is located near the throttle body. For a good photo, go to
http://integra.vtec.net/geeser/megamax/60k_service.html
Scroll down to Step 6, PCV Valve. Click on the thumbnail for an enlarged image.

You may test a PCV valve by removing it from the engine and shaking it. If you feel and hear the shuttle rattling around, the valve is still good. If no rattle, soak it in solvent for 20 minutes. If still no rattle, replace it.

Trace the path taken by the blowby which exits the engine through the PCV valve. It goes through a short length of rubber hose, then through a steel tube, then another rubber hose, and then into the intake manifold. That steel tube is fastened to the intake manifold by two welded-on brackets, each having one 10mm bolt. Remove those two bolts and remove the spring-steel hose clamps at both ends of the steel tube. This will free the steel tube to move about, and you will find it easier to extract the PCV valve.

 

Buy a genuine Nissan PCV valve. It's not an expensive part; those generic ones are junk.