Originally Posted by SSEi95
Some engines use the PCV as the oil cap, and some have it seperate. The 3800 series 1 SC has it seperate. You can see mine here (old cap, not the breather):
Right, but I was under the impression that all engines after 1968 were "closed". Meaning all engine oil fumes would be directed back into the carburetor(air/fuel mixture) where it will be burned for a cleaner emission. I would assume that if you put a breather element in place of the oil cap(on our 3.8L engines) you would definitely generate an SES code.