It is near the rear spark plug bank the right side
should be on top of valve cover This picture will help you find the PCV valve http://www.clublexus.com/forums/es300-and-es330-forum/418700-2001-lexus-es300-pcv-where-is-it.html What you really need to know is that if your engine has been desludged the L shaped plastic PCV valve would have been replaced with the metallic, straight screw in PCV valve first introduced in 2002.
I can be located on the left rear of the engine as you are looking under the hood. There is a black rubber hose attached to a plastic pcv and the pcv is pushed into the valve cover attached to the engine. Hopes this helps
IT IS LOCATED UNDER THE ENGINE COVER, THER WILL BE A HOSE CONNECTED TO IT. TAKE TEH ENGINE COVER OFF WITH 10MM SOCKET. IT IS LOCATED UNDER THERE NEAR THE FIREWALL. Have you heard the phrase a picture is worth 1000 words? The picture of this vehicle will help you find your pcv valve. Check it out: http://www.clublexus.com/forums/es300-and-es330-forum/418700-2001-lexus-es300-pcv-where-is-it.html
The PCV valve for a 2000 Lexus rx300 is on the passenger side of the engine. It is on the valve cover near the back.
The PCV valve on a 2002 Lexus RX300 is located on the passenger side of the car underneath the hood. The valve will be on the rear valve cover.
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The 2003 Subaru Outback PCV valve is located on the air cleaner housing. The PCV valve will be on the back of the housing.
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PCV valve (A)
Passenger Side, top of rear valve cover
The PCV valve should be located on the drivers side rocker cover near the front