jaluhn83
Full Access Member
So I'm curious.... has anyone ever determined exactly what causes the CDR valve to "fail"? It's tribal knowledge to replace them to correct high oil consumption, but yet having taken them apart I can't see anything that would wear out. All they are is a can with a rubber diaphragm designed to close off the PCV system under conditions of high intake vacuum. Mainly as I understand it this is solely to prevent the engine from sucking down oil vapors and running away in the event of a clogged intake. I guess I can see the diaphragm getting old and not working right, but under normal operation there's no way you should get high enough vacuum for it to even become an issue.
Thoughts?
Thoughts?