pcv substance

change my pcv valve today and I found some material on the bottom of it. to me it looks like water and oil mix. darker brown color , it is thick as well, any ideas? maybe moisture build up mixing with the oil? this is the pcv valve I had on the motor when the headgasket blew in may so maybe it is a residue from that. i actully dont remember removing the valve during the head change.

Clean it off w/ carb cleaner, stick it back together for a couple days and see what happens??. How does the oil itself look?

fine did an oil change about a month ago. no water/oil mix anywhere. I replaced it b/c it was a parts store brand pcv that took a crap in 9 months lol. so i installed a ford part.

im just wondering if moisture got in there some how. I remember when the head went i was talking to the machinist he told me the color of the cam showed some discoloration from moisture. almost like rust colored. very reputable shop as well. this could be from the headgasket but i dont remember how long the head was off the car and so on.

I also dont remember any water in the oil when the gasket went so thats what has me a little worried. Im gonna take a pic tomorrow of the "substance".

Water vapor gets into the crankcase because filtered outside air is drawn thru by the Positive Crankcase Ventilation system so what ever water is in the air is also in the system. In the winter the lower temperatures can more easily cause condensation of the water vapor since the relative amount of water vapor in the air is generally high and the condensation temperature is close to the air temperature. When you drive in the winter and take short trips any water being evaporated out of the crankcase passes thru the PCV valve and may recondense in the relatively cooler oil separator, hoses, and valve causing the brown water-oil emulsion you describe. Large amounts of this would be a concern, small amounts pretty normal.