PCV/Breather Help!
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New User
Joined: Jul 2008
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PCV/Breather Help!
I'm new to all of this, but love my truck so bear with me. The little spout on the top of breather (?) where I fill oil spouts oil out and smokes. I put a hose on it and routed it into the air filter, but now my air filter is getting hit with oil (I'm really intelligent). Now when I drive up some hills, the engine is coughing and sputtering, I guess because it's not getting the air it needs. Is this positive crankcase whatever (because I don't know what that is)? Am I an idiot?
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Joined: Mar 2004
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From: seattle
First off, welcome to FTE. As for the engine breather question...assuming its a V8 as original, the PCV is located on the rear portion of the passenger side valve cover and the engine fill vent cap is on the forward part of the driver side valve cover. The PCV on these engines was run from the little PCV valve on the right valve cover to a spacer plate under the carburetor where it attaches at the rear of the spacer plate sandwiched between the carb itself and the intake manifold. There is no connection of the breather cap on the left side of the engine.
Pull the PCV valve out of the valve cover...shake it and if it does it is functioning as it should.
If Im not mistaken, if you have the engine running and pull the pcv out of the cover and get oil spewing out of the hole or excessive amount of smake, this indicates bad rings and/or bad valve guides allowing oil to get by them.
If theres more info you can add as to your truck...a 6 or 8 cylinder and what size engine it has and what year truck, that will help greatly.
- cs65
Pull the PCV valve out of the valve cover...shake it and if it does it is functioning as it should.
If Im not mistaken, if you have the engine running and pull the pcv out of the cover and get oil spewing out of the hole or excessive amount of smake, this indicates bad rings and/or bad valve guides allowing oil to get by them.
If theres more info you can add as to your truck...a 6 or 8 cylinder and what size engine it has and what year truck, that will help greatly.
- cs65
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It's a V8 352 stock engine. The oil is spitting out of the breather, which I've read is probably blow by right? I don't have $ for a rebuild right now, so I guess I'll just keep it in oil. Thoughts...
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
With the PCV system, besides the hose from the smog valve (DOAZ-6A666-A) to the carb spacer plate, another hose runs from the oil fill cap to a nipple on top of the oil bath air cleaner.
The original 1965/67 oil cap was made with a nipple as part of it. Later, Ford replaced this cap with another (C8AZ-6766-A) that had a hole in the center, a rubber grommet (D0AZ-6A892-A) went into the hole, a 90 degree plastic nipple (C8AZ-6767-A) went into the grommet, then the hose ran to the nipple on the top of the air cleaner.
The original 1965/67 oil cap was made with a nipple as part of it. Later, Ford replaced this cap with another (C8AZ-6766-A) that had a hole in the center, a rubber grommet (D0AZ-6A892-A) went into the hole, a 90 degree plastic nipple (C8AZ-6767-A) went into the grommet, then the hose ran to the nipple on the top of the air cleaner.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
I'll let you know on Sunday evening, as I'm on vacation without search availability or parts catalogs.
