WL2005HBD
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- Aug 12, 2012
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- 2005 WL Statesman HBD
Hi,
Just trying to understand why some catch cans have a breather, and why some don't?
My understanding is that the PCV system. Which draws blow-by back into the manifold to burn in the combustion camber, requires SOME kind of vacuum, so how the hell is a catch can with a breather beneficial?? Wouldn't this just cause a giant vacuum leak?
and, if the filter is one way (e.g can only exhaust fumes, not intake), doesn't this defeat the purpose of the emissions system and technically make it a draft tube, which from my understanding has been illegal for decades?
Which should I go for? Non-breather or breather?
Also, should be installed somewhere between PCV valve and the intake? (the nipples on either side of the manifold)
Thanks guys,
Just trying to understand why some catch cans have a breather, and why some don't?
My understanding is that the PCV system. Which draws blow-by back into the manifold to burn in the combustion camber, requires SOME kind of vacuum, so how the hell is a catch can with a breather beneficial?? Wouldn't this just cause a giant vacuum leak?
and, if the filter is one way (e.g can only exhaust fumes, not intake), doesn't this defeat the purpose of the emissions system and technically make it a draft tube, which from my understanding has been illegal for decades?
Which should I go for? Non-breather or breather?
Also, should be installed somewhere between PCV valve and the intake? (the nipples on either side of the manifold)
Thanks guys,