pcv?
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New User
Joined: Jan 2007
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pcv?
Would running a hose from both valve covers to a tee to the intake breather hose on a 5.0 f150 allow the engine to breathe enough or do I have to use a pcv valve?
I've got different valve covers I wanted to run.
I've got different valve covers I wanted to run.
Freshman User
Joined: Nov 2005
Posts: 35
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From: Chattanooga, TN
Although that would keep the air coming in clean I would look at the fact that you no longer have a one way valve without the PCV. The motor would respond to this in the same way as a vacuum leak. It would indeed be a vacuum leak without a PCV, wouldn't it?
Senior User
Joined: Dec 2005
Posts: 206
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From: Piney Point Shores, Md
In order for the engine crankcase to breath you would have to have a fresh air supply, with both valve covers piped to the intake there would be no source of fresh air, not sure what that would do to absolute crankcase pressure, it would get drawn down and you might see a decrease in oil pressure because of the reduced back presure. It might cause other lube issues since you are trying to draw air in across the rear main seal as well as every other seal. Oil might actually find the path to the intake.
With the pcv removed you would be causing a vacuun leak, since crank pressure is constantly oscillating with no pcv valve there is nothing to close when differential pressure between the two is momentarily reversed.
With the pcv removed you would be causing a vacuun leak, since crank pressure is constantly oscillating with no pcv valve there is nothing to close when differential pressure between the two is momentarily reversed.
