PCV & breather related questions

[aribert]

When our small sixes were first introduced, asside from California, they had a road draft tube for the first 4 or 5 years. Then a PCV valve by about '65. When the PCV was added, did the oil filler have a breather element in it? When did the filler caps begin to be ported thru the air filter housing?

With a pcv valve, does the engine still need additional breathing? On atleast some '90s vintage vehicles there is only a PCV.

The reason I ask all these questions is that I am trying to plumb the '78 200 that is now in my '61 Falcon. My Falcon was a California built / California delivered vehicle that has a PCV valve instead of the road draft tube. THe PCV valve is screwed into a port on the carb adapter. The oil fill cap served as a breather

I am trying to make my 200 look a bit more discrete and period correct and I intend to ditch the '78 valve cover next winter. In the mean time I am trying to simplify the hoses and would like to plug off the oil fill cap breather hose. Any issues with that? I will be using a '66 vintage carb and stock early or mid '60s air filter housing and it does not have the extra port for the oil filler cap vent.

 

[Patrick66]

this is what mine looked like, no need for a hose because the bottom has holes drilled in it.

http://www.parts123.com/parts123/yb.dll?parta~partsort

 

[fordconvert]

So you are going to keep the PCV?

You have the PCV in one end of the valve cover? And you now have a filler cap that has the nipple that used to go into the air cleaner? As long as its got the filter stuff in it you dont need to hook it to anything. You want it to have some sort of filter so you are not sucking crap into your engine.

I have been told that the regular filter breather caps always tend to leave an oil film around them (mine do) but if you run one with the nipple not connected to anything you wont have that problem.