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View Full Version : PCV Valve - where does vacuum come from??



wagsyall
04-24-2014, 04:19 PM
I've looked at pics and manuals everywhere and can't find my answer...
Where does the vacuum pull from specifically? I want to know if pulls vacuum into all 4 cylinder chambers? I always thought the PCV pulled fumes out- but I have no idea obviously as it seems with a little research that simple fact is way wrong, so hopefully yall can enlighten me. I specifically trying to find out where the vacuum comes from for evaluating vacuum intake- the pictures I have found of the engine removed and pulled apart looks like this PVC hole where you put the valve in goes into the crankcase of the engine? My research is giving me more questions than confident answers so that's why I am asking for help/knowledge here on it.

TheMAN
04-24-2014, 08:03 PM
the PCV valve goes into the top of the valve cover, and then it connects to a short rubber hose that goes to a long metal tube that eventually reaches the intake manifold