Nice write-up.
How bad was your PCV valve? Did you look inside it to see if it was covered in crud or anything?
How bad was your PCV valve? Did you look inside it to see if it was covered in crud or anything?
PCV Valve Replacement - 2005+ VQ40DE
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.
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.
3
