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Hey guys - quick write-up on doing your PCV valve I thought I'd share.

Nissan Part #: 11810-EA200

Easiest way to do this one is to knock it out while you're doing your spark plugs. You will have to remove the intake manifold collector to do those, so you may as well hit this one while you're under there.

Follow Shiner's write-up on removing the manifold here: http://www.clubfrontier.org/forums/f23/how-change-spark-plugs-2005-gen-2-frontier-40507/

It is very helpful in this process. Once that's all apart, you can get here:



That's where it is. You need to remove the hose that runs from there back up to the manifold. Closer up shot:



The PCV valve is threaded, but even with the manifold off, it is still a pain to get anything in there to remove it. I used an adjustable wrench and was only able to get it 1/4 turn at a time. After a few turns, you should be able to get at it with your hand and unscrew it the rest of the way.

Old and new:



Tips: If you have a stubby adjustable, or a 1" box-end that you don't care about, you can cut half the handle down and that will make things 100x easier to get in there. Most of the aggravation with this was only getting 1/4 turn at a time on the wrench.

Thread the new one in by hand as far as you can and then tighten it down with your adjustable/box end wrench. Be careful not to overtighten - the threads are plastic after all. Button it all back up using Shiner's write-up, making sure to connect all hoses, vacuum lines and electrical connections.
 

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Nice write-up.

How bad was your PCV valve? Did you look inside it to see if it was covered in crud or anything?
 

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Good to know! stumble upon this randomly, wasn't searching for it or anything but def good info I can use in the future. Question though, what made you change your PCV valve?
 

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Thread resurrect, but just wanted to add that I was able to finally tackle my PCV replacement on 2006 4.0 Frontier. I have tried to get to it before, but never had the proper tool because it was in such a tough angle to get to. 170,000 miles with it never being changed, I figured it was time. I also replaced the hose because it was becoming brittle.

I was able to easily get the old one out and put a new one in with 23mm 1/2" socket, 3/8" flex head ratchet, 3/8" to 1/2" adapter. Didn't need to remove anything else, not even intake manifold cover.

Just sharing how I got mine off, in case anyone encounters the issue of removing it.
 

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Thread resurrect, but just wanted to add that I was able to finally tackle my PCV replacement on 2006 4.0 Frontier. I have tried to get to it before, but never had the proper tool because it was in such a tough angle to get to. 170,000 miles with it never being changed, I figured it was time. I also replaced the hose because it was becoming brittle.

I was able to easily get the old one out and put a new one in with 23mm 1/2" socket, 3/8" flex head ratchet, 3/8" to 1/2" adapter. Didn't need to remove anything else, not even intake manifold cover.

Just sharing how I got mine off, in case anyone encounters the issue of removing it.
I recently replaced mine too without removing the intake plenum.
 

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That is encouraging news. Can you please elaborate on it? was there any special trick you used?
Sorry for the delay. No trick, the hardest part was getting the old hose and clamp off of the PCV. Just grab an adjustable set of pliers or needle nose, take the clamp off, pull the hose off. Then with the 3/8 flex head ratchet and 3/8 to 1/2 adapter and socket, start loosening it. This is the ratchet I used

http://www.autozone.com/ratchets-sockets-and-wrenches/ratchet/duralast-flex-head-ratchet/482538_0_0/

Good luck, wasn't too bad this way
 

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Thread resurrect, but just wanted to add that I was able to finally tackle my PCV replacement on 2006 4.0 Frontier. I have tried to get to it before, but never had the proper tool because it was in such a tough angle to get to. 170,000 miles with it never being changed, I figured it was time. I also replaced the hose because it was becoming brittle.

I was able to easily get the old one out and put a new one in with 23mm 1/2" socket, 3/8" flex head ratchet, 3/8" to 1/2" adapter. Didn't need to remove anything else, not even intake manifold cover.

Just sharing how I got mine off, in case anyone encounters the issue of removing it.
Ditto here. Didn't have to remove the manifold cover - just used a 23mm 1/2" socket, 3/8" standard ratchet, and a 3/8" to 1/2" adapter. Probably took 5 minutes start to finish. Hardest part was getting the hose clamp off!
 
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