[oldskewel]

I don't know specifically for these Honda PCV valves, but I've read how modern PCV systems are more complex than simple check valves. They are designed to provide specific flow resistance depending on the relative pressures on either side of the valve (manifold vacuum vs. crankcase pressure).

For me, that's enough to just get the Genuine Honda in this case.

Someone else could definitely make a check valve that rattles (or not), but it might not be flowing as Honda wants it to.

BTW, has anyone with a known good (e.g., new) Genuine Honda valve actually confirmed for themselves the clicking when doing the pinch hose B test? I did that on mine the other day, and did not get any clicking. Removed the valve and I could shake it and barely hear a little muffled rattle. So I'm having doubts about that service manual test. Anyone?

 

[oldskewel]

Having a new OE PCV valve, if you're willing to do the pinch test shown earlier in this thread, you could answer the question I still have about this, from post #44 above,

"BTW, has anyone with a known good (e.g., new) Genuine Honda valve actually confirmed for themselves the clicking when doing the pinch hose B test? I did that on mine the other day, and did not get any clicking. Removed the valve and I could shake it and barely hear a little muffled rattle. So I'm having doubts about that service manual test. Anyone?"

As far as I know, I have no problems, and am still on the original PCV valve. But I do not get any click when doing the pinch test.

 

[oldskewel]

... I should have left the pcv be.

If it ain't broke, fix it until it is.

Completely understandable. Sorry to hear of the tough situation. I'm still hoping to eventually hear an answer to my repeated question from posts 44 and 60, asking basically if the pinch test is reliable. I have my doubts about that, and of course if fixing a working system has a good chance of breaking it, having a good test that can be believed is valuable.

I have removed, cleaned, inspected, and reinstalled my PCV valve, (so at least I know I'm not likely to be breaking anything when replacing it) and am inclined to just replace it next time I order any other parts.

 

[oldskewel]

Apparently you can check the PCV function without removing it from the vehicle. I have not done this yet but plan to do so soon.

From the service manual:

At idle, listen to the PCV valve (A) with a stethoscope as you lightly pinch the PCV hose (B) with your
fingers or pliers several times. Each time the hose is pinched, the valve should click.
If there is no clicking sound, check the PCV valve collar and O-rings for cracks or damage. If they are
OK, replace the PCV valve (see PCV VALVE REPLACEMENT ), and recheck.

OK, finally here is my answer to the question I've asked a few times in this thread, with no answers ...

I think my 2011 with 137k miles is running fine.

I did this pinch test probably back in 2020, and heard no click, but since I'm cautious about believing everything I did not pull the alarm just yet ...

Today I installed a new Genuine Honda valve, and did this test. Knipex Pliers Wrench to securely clamp and un-clamp hose B as needed. Mechanics stethoscope on the PCV valve.

I heard no click at all. BUT I did hear a sucking / whooshing sound that was clearly triggered by the clamping. Did it several times to confirm. Completely inaudible without the mechanics stethoscope; clear as day with it. Now, although I know I heard no clicking with the old valve in there, I can't be sure there was no whooshing sound with the original valve, but I'll guess I would have noticed it if it had happened.

So based on this, and the fact that nobody in this whole thread has claimed to hear the click when pinching hose B as the manual claims, I will consider that the test should listen for an audible change in air flow at the PCV rather than a click.

So if you don't hear a click, that might be OK. But if you hear a whooshing noise, that probably means OK. If you hear no change, you might have a problem, or maybe the hearing tool is not sensitive enough.

Expecting 40 HP and 2-3 mpg improvement.