breathers what do they do
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consists of breather(s), which expel crankcase vapors into the atmosphere,
whereas a "closed" PCV system, using the one-way PCV (flow control) valve,
routes the crankcase vapors back into the intake manifold, thereby recirculating
those vapors into the combustion chambers.
Never clean and re-install the valve - always replace it.
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And in doing so, you contribute to more pollution. The "open" PCV system
consists of breather(s), which expel crankcase vapors into the atmosphere,
whereas a "closed" PCV system, using the one-way PCV (flow control) valve,
routes the crankcase vapors back into the intake manifold, thereby recirculating
those vapors into the combustion chambers.
Never clean and re-install the valve - always replace it.
consists of breather(s), which expel crankcase vapors into the atmosphere,
whereas a "closed" PCV system, using the one-way PCV (flow control) valve,
routes the crankcase vapors back into the intake manifold, thereby recirculating
those vapors into the combustion chambers.
Never clean and re-install the valve - always replace it.
When you're running low-tension rings, you'll need additionaly crankcase breathers, as the factory PCV system can't keep-up at high RPM.
WD
![](http://shutter06.pictures.aol.com/data/pictures/22/008/7C/D5/F2/AD/c0cuez6Vl3zFfq5yiZKSH7g1XYYKNjMw0300.jpg)
![](http://shutter07.pictures.aol.com/data/pictures/23/00B/7F/73/01/54/xcGBPeKqmnxogOcacz9d2uGqAJCaIogX0300.jpg)
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OMG, my LTX race engine is not "green friendly." But, I'm making a lot of HP and getting down the track really fast, so what the hell. Sorry about that Al.
When you're running low-tension rings, you'll need additionaly crankcase breathers, as the factory PCV system can't keep-up at high RPM.
WD
![](http://shutter06.pictures.aol.com/data/pictures/22/008/7C/D5/F2/AD/c0cuez6Vl3zFfq5yiZKSH7g1XYYKNjMw0300.jpg)
![](http://shutter07.pictures.aol.com/data/pictures/23/00B/7F/73/01/54/xcGBPeKqmnxogOcacz9d2uGqAJCaIogX0300.jpg)
When you're running low-tension rings, you'll need additionaly crankcase breathers, as the factory PCV system can't keep-up at high RPM.
WD
![](http://shutter06.pictures.aol.com/data/pictures/22/008/7C/D5/F2/AD/c0cuez6Vl3zFfq5yiZKSH7g1XYYKNjMw0300.jpg)
![](http://shutter07.pictures.aol.com/data/pictures/23/00B/7F/73/01/54/xcGBPeKqmnxogOcacz9d2uGqAJCaIogX0300.jpg)
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just remember in some cases the PCM can't deal with the extra unmetered air let in by the breathers. The PCM should be able to handle it, but in some cases (mine for example) the PCM doesn't want to compensate for it.