I've got a 1987 F150 6 cyl. and can't locate the PCV valve. The diagram in the Haynes manual is vague at best.

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1987 F150 with 67000 original miles.

 

As far as any V8 that I have ever owned the PCV valve is located on top of the passenger side valve cover, in you case (Inline Six) I would think that it would be in the very back of the valve or rocker cover, but then again I have never owned a straight six.....good luck.

 

Thanks for your input. I found it, way in the back of the engine kinda on top, just followed the 1/2 inch hose. What a place to put it, I had to climb on top of the engine to get to it.