Crankcase Breather filter
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From: Wisconsin
Crankcase Breather filter
I need help determining the part # for the little filter that goes inside the air cleaner housing in my 84 F150 with the 300. I bought the truck and it was hooked up with a little elbow going into the side of the air cleaner with no filter on the inside. I bought a filter from oreillys but the little plastic thing that the filter came with did not fit through the opening on the side of the air cleaner so their catalog is not accurate. I have access to NAPA and Oreillys. Maybe this is why I have always had a lot of oil in the air filter housing 
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From: Wisconsin
Looking at photos on the internet it appears that from 1984 onward the 300 six engine used a valve cover with an opening for a dedicated oil fill cap and another right behind it for a breather cap with a hose that leads to the elbow that fits into an opening like the one on my air cleaner. My truck appears to have the 1984+ air cleaner with the older style valve cover. I wouldn't be suprised if the PO had done this, considering the "modifications" he made to the feedback carburetor system. I hope the oil that accumulated in the air filter housing didn't mess up the non feedback carb I installed a few months ago.
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From: Wisconsin
The two options I have are to find a truck with the older air cleaner assembly or find one with the newer style valve cover. I think i would rather swap valve covers since I have the complete 84+ air cleaner already and it is due for a gasket anyway. Unfortunately Ebay seems to only have the older valve covers at the moment.
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From: Wisconsin
Since it would a pain to get to the junkyard in this weather I bought a valve cover on ebay that is the newer style with a seperate oil filler cap and crankcase breather cap. I plan on getting one of those chrome crankcase breathers with the integral filter from the parts store.
http://www.ebay.com/itm/Brand-New-4-9L-300-CID-Ford-Valve-Cover-/261150574518?pt=Motors_Car_Truck_Parts_Accessories&hash=item3ccdc987b6&vxp=mtr
http://www.ebay.com/itm/Brand-New-4-9L-300-CID-Ford-Valve-Cover-/261150574518?pt=Motors_Car_Truck_Parts_Accessories&hash=item3ccdc987b6&vxp=mtr
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From: Marlborough, CT
hmmm...I have a 86 with the 2 hole valve cover but the old round air cleaner (not like the one pictured). The filter media is in the push-in "cap" and the hose just goes to the side of the air cleaner. ~Bill
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You could always get a breather that replaces the oil cap and not worry about the connection to the air cleaner. They also make ones that push in to the grommet on the newer valve covers.
The line as you know was simply to bring filtered air into the crankcase. The PCV valve or course is where the fumes come out. The breathers that replace the oil cap or plug into the grommet perform the same function.
You could then just block off the hole in the air cleaner, or get a different one. Does your air cleaner also have the heat riser and valve connected to vacuum? If you went with an aftermarket air cleaner, you'd lose that of course. That said, many I have seen don't have the heat riser hooked up anyway and are really not working in that capacity.
The line as you know was simply to bring filtered air into the crankcase. The PCV valve or course is where the fumes come out. The breathers that replace the oil cap or plug into the grommet perform the same function.
You could then just block off the hole in the air cleaner, or get a different one. Does your air cleaner also have the heat riser and valve connected to vacuum? If you went with an aftermarket air cleaner, you'd lose that of course. That said, many I have seen don't have the heat riser hooked up anyway and are really not working in that capacity.
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From: Wisconsin
I went Oreillys in search of finding an oil cap that also would double as a breather but had no luckk They had on screw on style that said was for GM and Mopar but the rest of them were the push on kind that wouldn't have worked with my current valve cover. The heat riser system is intact so I really want to keep it oem. I needed to replace the valve cover gasket anyway so it's not a big deal. Now I can't decide if I want to leave the valve cover black as it comes or paint it blue.
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