72 PCV valve

[Denny J.]

I have 72 with 2 parts which one do I use?They both have the same letters,AC Spark Plug Type CV 736 C .The looks are the same but one has 4 holes around the bottom and when fliped it has the letter D the other has 9 holes around the bottom and fliped it has the letter M thanks Denny

[Joe L.]

Re: 72 PCV valve

denny-----

The one with the "4 indentions" and the letter "D" is the most correct for your application. The other one with "9 indentions" and the "M" is a much later SERVICE piece. They're both functionally identical, though.

[Denny J.]

Re: 72 PCV valve

Thanks joe I hoped you would jump in.

[Joe L.]

Re: 72 PCV valve

denny-----

Keep in mind that there was quite an evolution of "nuances of configuration" for the CV-736C valve over time. The "indentions" and alpha character embossment discussed previously are but TWO of the "evolutionary nuances". Most original PRODUCTION valves and those available early in SERVICE had the stamping "AC Spark Plug" + "CV-736C" on the side of the valve. Later SERVICE valves may have just "AC" + "CV-736C". There may be some other nuances that I've forgotten, too.