[BTCC]

Just purchased a BECK ARNLEY pcv valve from rockauto.com. Are they suppose to make a rattling sound when you shake them.

 

[ForteGT2]

Yes. If it doesn't rattle the valve is stuck.

Shake Your PCV Valve (DIY) (familyhandyman.com)

This sounds complex, but it’s not. Pull out your PCV valve every other oil change. In most cases, you’ll find the valve on the top of the engine, connected to a vacuum hose. Some late-model cars don’t have PCV valves, so don’t beat yourself up trying to find it. Slide the vacuum hose off the valve and unscrew the valve. Then perform the world’s easiest diagnostic test: Shake it. If it makes a metallic clicking sound, it’s good. If it doesn’t make noise or sounds mushy, replace it. But don’t replace it on appearance alone—all used PCV valves look dirty.

 

[BTCC]

After 127,000 miles I said it was time to change it. Paid less then $9 for it from rockauto.com

 

[RandyM]

I had an old and trusted mechanic tell me that PCVs are much more important than their small size and low price would indicate. A bad PCV will eventually ruin an engine.

He said beware of aftermarket PCVs, especially from China. Stay with OEM here.

 

[ForteGT2]

I had an old and trusted mechanic tell me that PCVs are much more important than their small size and low price would indicate. A bad PCV will eventually ruin an engine.

He said beware of aftermarket PCVs, especially from China. Stay with OEM here.

A blocked PCV valve can cause a pressurized crankcase and damage engine gaskets causing oil leaks. It can also cause oil to be pressed into the piston rings creating carbon build up that will jam the piston rings resulting in more blow-by.