I read that an indicator that a PCV valve is bad is excessive oil consumption and oil leaks, which I have been experiencing the last couple of years. I also read that you can test to see if a valve is bad if it doesn't rattle when you shake it.
I replaced my original 13 year old PCV valve at 112k miles with GM part #12574660, which included the PCV valve and the hose.
When I removed the old valve and hose assembly, the valve was able to be removed from the old hose easily. I heard no rattle when I shook it, so I figured I found a bad valve. However, I also heard no rattle when I shook my new valve and hose.
When I looked inside the old valve, it is just an empty chamber. There is no ball valve inside like I expected to see, so there is nothing to rattle. The new valve is attached firmly to the new hose, so I didn't remove it to look inside, but I assume it also doesn't have a ball inside if there is no rattle when shaken.
Am I missing something here? If it is a "valve", how does it open and close?
Also, the other end of the PCV hose attaches to a plastic nipple connection on top of the engine near the intake manifold. How is that part removed to inspect and clean it?
Thanks!
I replaced my original 13 year old PCV valve at 112k miles with GM part #12574660, which included the PCV valve and the hose.
When I removed the old valve and hose assembly, the valve was able to be removed from the old hose easily. I heard no rattle when I shook it, so I figured I found a bad valve. However, I also heard no rattle when I shook my new valve and hose.
When I looked inside the old valve, it is just an empty chamber. There is no ball valve inside like I expected to see, so there is nothing to rattle. The new valve is attached firmly to the new hose, so I didn't remove it to look inside, but I assume it also doesn't have a ball inside if there is no rattle when shaken.
Am I missing something here? If it is a "valve", how does it open and close?
Also, the other end of the PCV hose attaches to a plastic nipple connection on top of the engine near the intake manifold. How is that part removed to inspect and clean it?
Thanks!