Nissan 11810-8J101 Positive Crankcase Ventilation Valve

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Depending on the engine, the location of the PCV valve can change. On four-cylinder engines, the PCV valve is in a grommet which is located on the lower right timing chain cover at the lower end of the engine below the power steering pump. The 3.3L V6 has a threaded PCV valve into the upper intake manifold. In 3.5L V6 engines, it is placed in a grommet at the rear of right valve cover. If you are working on a model with a 4 cylinder engine, remove the hose and take out its breather separator. In case of 3.3LV6 engine, remove hose and unscrew from upper intake manifold. As for 3.5L V6engine, open both plenums to get to it then yank out of its grommet . Shake it so that you can hear if it rattles or not shake t causes rattling or not . Replace any valve that does not rattle when shook Once you have got your new PCV valve, make sure that it matches your vehicle and motor size. To ensure that they are similar compare them with each other.

It is fitted in the rear valve cover, behind the throttle body. Screw off the PCV valve and pull it out of the valve cover; vacuum should be pulling on the valve when the engine is running. With the engine turned off, and slightly open the hood, make sure the engine is at normal operating temperature, place your finger over the end of the valve; if no vacuum is felt then examine for a plugged hose or valve and if any hoses appear plugged or deteriorated then replace them. When sourcing for a replacement PCV valve, consider the compatibility of the PCV valve with your car's make and the size of the engine before buying it, then closely compare the new one with the one that was replaced.