How can I identifies the PCV valve in the motor, where is ti??? and how can I chenge it???

The PCV ( Positive Crankcase Ventilator ) valve is located in a valve cover. It is identifiable by the largish hose ( usually about 1/2 - 3/4 inch diameter )going from it to the intake system. If you have a throttle body injection system, the PCV hose will go to the throttle body. Typically PCVs are on the passenger side of the motor.

I would assume its on the valve cover...my 2 c..

If the engine in question is the 4.3l Vortec motor, the pcv valve is located on the driver's side valve cover, near the center. If it is the 2.2l motor, it is also located on the main valve cover, near the front of the cylinder head.

I don't think Toyota calls it a PCV valve like most companies I believe they call it a ventilation valve
Its on the left side of the motor at the top of the valve cover (looking at the motor) hope this helps

Hi!!
The PCV valve is located on top of the Valve Cover, it is held in place by a rubber grommet and has a vacuum hose connected to it. The PCV valve can be easier to remove if you just pull the vacuum hose (with the valve attached) straight out and then remove the valve from the vacuum hose. Here is a picture of the PCV valve for easier identification.
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PCV valve is round and screws into the intake manifold. It can be identified by the hose coming out of the top of it going to the valve rocker cover. When you unscrew it be sure to not lose the "O" ring.

It is below the egr valve close to the intake manifold below the intake air sensor, there is a tube running to it from the engine to recirculate exhaust air with fresh air, there is a clamp holding it to the air intake that you need pliers to remove, then you need to turn counter-clockwise 90 degrees to remove, do the reverse to install. to make it easier to access remove the upper intake. The pcv valve is not visible, however, you can identify it by the 3" inch long rubber hose that connects to the steel line running into the bottom of the intake. I have the part and am going to replace it soon, although Ford really makes it difficult to remove it -
pcv valve is located just under the throttle body. remove air cleaner assembly from throttle body and you will see a u shaped hose running horizontally.

you pcv valve should be located on the top or around the intake on top of the engine. It is covered by a little pcv valve rubber hose...it is easy to identify because it is similar to a radiator hose but a lot smaller...no where near the size of a radiator hose...but when located, the pcv valve just pulls out and to check for it being bad, shake it and it should sound like something loose inside the pcv valve (thats a good pcv valve) but what they look like, they should be a silver looking color with a small little neck on it

the part that you describe is the valve cover, yes they do leak oil, especially if the pcv system is not working properly