Could somebody tell me where exactly is the PCV valve location on the GX. What exactly is the function of this valve, is it anyway related to the Emission ?? Appreciate your replies.

 

I know that on Lexus RX 300 its located right under the intake toward the firewall on the passenger side.

PCV valve is for emission it should cost no more than $20.

Did you decide to change it?

 

No, I was looking at the service history of my vehicle, and happen to see that every 5k miles this has been replaced by the dealer, any reason, this has to be replaced so often.

 

PCV allows ventalation for your crankcase (block)...I wouldn't see a need to change it unless it's bad.

 

Probably to prevent it from getting gunked up. PCV valve vents the oil that is vaporized in the block back into the intake tract to burn it before emitting it out the tailpipe. Because there is oil in the vapor, it eventually builds up on stuff. It's a big issue with turbo cars that tend to have more blowby and thus more oil in the vent lines; incidentally, oil mixed into the intake stream also effectively reduces the octane level of the combustion charge. That's why we turbo people use catch-cans to condense the oil out before the intake, particularly where we have lots of IC piping. Anyway, that was a major digression, but if its a cheap part, it's probably replaced as preventative maintenance.

 

Nic / Purple , would you know where is this part exactly located on the GX, I am curious to have a look if this is a new part installed.

 

Could somebody tell me where exactly is the PCV valve location on the es 350 2007. What exactly is the function of this valve, is it anyway related to the Emission ?? Appreciate your replies

 

Try the ES forum, you're in the wrong section entirely.

 

No way Mann is asking this question?

 

it is 12204 highlighted. part number is 12204-31040

 

Oh that was a question raised 7 yrs back oh blimey did find it out soon after I picked the manuals. Hmm the answers now. Good day guys

 

I replace the PCV valve on my 2005 GX470 with 80K. It's located near oil filler, and the PCV's tube almost points to oil filler.
I tried 2 times. The first time the vehicle is kind of cold. I waited a while after driving and replaced all 4 driver's side spark plug and then tried to remove the PCV. It's too tight to be removed.
After some research, I tried the 2nd time while the car is hot, right after driving. I did it this time.
The old PCV is in brown color, oily, but still working fine.
My question, if the pink thread paste drop into engine, is that OK?