352 and a PCV
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From: Lake Mathis
352 and a PCV
I have searched the forum and haven't really found exactly what I am looking for. I am in need of some advice. I have a 65 F100 with a 352. I replaced my original 352 with a rebuilt one, I used my original valve covers and intake. Neither have a place for a PCV. I noticed I am getting the mist from my breather and I am sure it is because there isn't a PCV. Exactly where does it go on that motor with that set up? Do I need to replace my valve covers with one that has the hole for a PCV? If so, how do I route it? The spacer under my carb is a philonic spacer to keep the carb off the manifold. I am hoping someone else has had an issue similar and found an easy fix. Thanks in advance for any help.
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Valve cover swap is the easiest. You may have a road draft tube "fitting" on the back of the intake manifold, which is where that tube attached pre-PCV.
This system can be duplicated or approximated on your engine:
https://cimg4.ibsrv.net/gimg/www.for...53e1b3bbc1.jpg
Note one side pulls air out of the engine via the PCV through a tube to base of the carb, or to a carb spacer with the tube. In the illustration, the engine gets fresh air from the air cleaner. You can bypass that and just have a good filtered breather on that side so the air going into the engine is clean, and of course on the opposite side of the PCV. The OEM gets the air from inside the air cleaner housing so as to (somewhat) contain fumes after shutdown, and to get a somewhat clean batch of air to pull from. Note there is a separate filter for the PCV intlet inside the air cleaner housing.
This is the spacer. My '65 289 and our '66 390 2v had similar spaces. Billions served. 4bbl available as well:
https://secure.cougarpartscatalog.com/carbspcr2v.html
This system can be duplicated or approximated on your engine:
https://cimg4.ibsrv.net/gimg/www.for...53e1b3bbc1.jpg
Note one side pulls air out of the engine via the PCV through a tube to base of the carb, or to a carb spacer with the tube. In the illustration, the engine gets fresh air from the air cleaner. You can bypass that and just have a good filtered breather on that side so the air going into the engine is clean, and of course on the opposite side of the PCV. The OEM gets the air from inside the air cleaner housing so as to (somewhat) contain fumes after shutdown, and to get a somewhat clean batch of air to pull from. Note there is a separate filter for the PCV intlet inside the air cleaner housing.
This is the spacer. My '65 289 and our '66 390 2v had similar spaces. Billions served. 4bbl available as well:
https://secure.cougarpartscatalog.com/carbspcr2v.html
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From: Lake Mathis
I am running the stock style 2 barrel carb with an aftermarket air cleaner.
That spacer should fit on a 352 as well? If so, valve covers and that spacer should take care of it. Thanks for the direction.
That spacer should fit on a 352 as well? If so, valve covers and that spacer should take care of it. Thanks for the direction.
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From: Lake Mathis
I went through some of my old parts. I have a spacer but will have to drill the middle hole out. Right now its just a blank plug. I have the cooling lines on it (spacer) still, so I will have to block those off. As far as the valve covers, I would just run a hose from the pcv on the valve cover to the spacer? The other side will have a regular breather cap on it as well? Could I use this spacer as well as my philonic spacer?
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The cooling/heating spacer won't work. The spacer needs to pass the fumes into the intake stream. That cooler spacer is all sealed up right? As to routing, yes PCV to spacer, opposite valve cover has a filtered breathing. You can get the with the K&N style filter. Much better than a little steel wool stuffed in the cap like some caps.
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I used to use 2 gaskets on each side of the spacer to fill the little imperfections in the surfaces. You could always add a phenolic spacer on top of the PCV spacer if you have room and long enough studs.
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From: Lake Mathis
Once I looked at the cooling spacer, I realized it wouldn't work. I found one online and ordered it along with two new valve covers and everything I think I'll need to put it together. Once everything gets here and its on, I'll update the thread. Thanks.
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From: Simi Valley, CA
When installed on the right (passenger) side, the smog valve fits into a rubber grommet that twists into the hole located at the rear of the cover.
Then the smog hose fits to the valve then to a nipple on the carb spacer plate.
The rubber grommet used in 1965/66 is different than 1967. The 1967 grommet is different than 1968/76.
Which type of covers do you gave?
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From: Lake Mathis
Right now I have the "Powered by Ford" covers without any holes in them. I ordered a pair of valve covers for my 352 that have the holes, I also ordered the PCV grommet and a breather w/grommet. I also found the spacer for the bottom of my carb with the fitting for the hose from the PCV. I think I have everything, just waiting for it to be delivered. Once I get everything installed, I'll update the thread.
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
Right now I have the "Powered by Ford" covers without 
any holes in them. I ordered a pair of valve covers for my 352 that have the holes, I also ordered the PCV grommet and a breather w/grommet. I also found the spacer for the bottom of my carb with the fitting for the hose from the PCV. I think I have everything, just waiting for it to be delivered. Once I get everything installed, I'll update the thread.
any holes in them. I ordered a pair of valve covers for my 352 that have the holes, I also ordered the PCV grommet and a breather w/grommet. I also found the spacer for the bottom of my carb with the fitting for the hose from the PCV. I think I have everything, just waiting for it to be delivered. Once I get everything installed, I'll update the thread.1958/64 FE valve covers are rounded without holes for oil cap/valve. There's an oil fill tube on the front of the engine and the smog valve threads into a fitting at the front of the intake manifold.
Here's a "generic" pic (lower) from the truck parts catalog, it's similar to what your truck had originally. The valve is 6A666 and the grommet is 6A892.
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From: Lake Mathis
I ended up changing out my valve covers with the holes for a breather and PCV. Put a spacer under my carb that has the fitting for the hose that runs from the PCV. I did double up the carb gaskets under that spacer. She is all back together and running great. No more oil mist or oil smell in the cab. Thanks for all the advice...
Dan
Dan
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