PCV, do you need it?
can i just put a vacuum cap on the pcv valve thats right next to the pass. side valve cover, so i can run an open air filter set-up instead of the stock box. or do i need to keep that plugged into my airbox? thanks
or could i put a breather on the end of the hose? |
hell no! the crankcase builds a little pressure not to mention all kinds of toxic and corrosive byproducts that need to be vented/burned.
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Originally Posted by Texas Terminator
hell no! the crankcase builds a little pressure not to mention all kinds of toxic and corrosive byproducts that need to be vented/burned.
Since that is the case, plugging that line there, and installing an oil cap breather would be the same...wouldn't it? |
Actually no, it sucks from the valve cover into the intake. Do a search on "catch can" and you'll understand.
The intake manifold is under vacumn and the crankcase builds pressure. What do you think is going to happen. |
Originally Posted by Zick
Actually no, it sucks from the valve cover into the intake. Do a search on "catch can" and you'll understand.
The intake manifold is under vacumn and the crankcase builds pressure. What do you think is going to happen. Actually sort of. And I answered my own question at the same time. It recirculates the crankcase, but putting a breather would allow unmetered air in the manifold causing a lean mixture. Leaving the tube on the R/H side plugged into the T.B. from the R/H valve cover would allow it to draw metered air. ;) |
im currious as to why yo need to get rid of the pcv valve? my roomate and i both have open elements and still have our pcv's.https://www.performancetrucks.net/fo...e=1&p=3240338#
Huh |
Originally Posted by smooth_addictions
im currious as to why yo need to get rid of the pcv valve? my roomate and i both have open elements and still have our pcv's.https://www.performancetrucks.net/fo...e=1&p=3240338#
Huh |
can you say c.a.i. you are right it is on the l/h and that is the ventline
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the only reason for having the pcv valve and venting into the intake is for emmisions. Put a breather on the valve cover opening and plug the vacumm line that leads to the intake
The end no more oil consumption BTW: there is no such thing as unmetered air if your running in SD |
The pcv system also helps to relieve crank case pressure which your seals and gaskets will like. Too much pressure in the crank case can lead to blown seals resulting in external leaks and/or oil blow-by into the combustion chambers/cylinders. I personally can't think of any good reason to remove the pcv system on a street driven vehicle, especially since the engineers who designed the engine control system have figured that "controlled vacuum leak" into the equation. On a full race vehicle, you can get away with breathers, maybe, but I wouldn't do it on a fuel injected street vehicle.
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