How Does a PCV System Work - Also Testing and Inspection of the PCV Valve

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Here is a video on how the PCV system works on your car and also testing and inspecting procedure of the Valve and system components.

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Probably one of the best explanations in YouTube mentioning why PCV always has to be used with a breather tube, that clears most of my doubts. Great video brother!

vijayam

Great video. Explained well. I like the fact that you explain with the diagrams and then show a real example. Very clear and understandable. Keep up the good work.

pnswg

The PCV is one of those little marvels of universally adopted engineering. The simple appearance belies underlying complexity! No vacuum - closed to prevent backfire induced retrograde flow, high vacuum - minimal flow (at idle when you don't want a big swing of crankcase pressure), low vacuum - high flow when at wide open throttle the engine can easily take in extra blowby gas. Great practical summary!

spelunkerd

PS: This is how videos should be produced. Straight to the point and informative.

timanderson

Just ruddy excellent. Dude thank you so so much. I've been watching more of your videos just in the last week, you have quite a gift for knowledge transfer. Not everyone is able to do that effectively. That diagram and the way you explained it really helped me understand PCV properly. I vaguely knew it was pressure equalisation but I struggled with how and why oil could traverse all the way up to the airbox, or an intake manifold - I've seen both. I see now it's not really being drawn all that way directly, it's just oil that was _already_ in the upper area doing normal stuff, and getting through PCV or breather hoses.
I've done quite some work on my car this week, have more to do and I knew checking the PCV would be part of it. I just wasn't really sure why.

chocolate_squiggle

Thank you!! is a real good information for inspect and change the PCV Valve..greetings from Guatemala City!!!

virc

Great explanation, easy to understand! Thank you!

phantasmagorezzyzx

First time I learn from you about PCV valve ...thanks

bimalkumar

Dude almost has a million subs and uses a 2x4 to hold hood I love it haha

davidsimmons

Thank you for explaining how the pcv system works. Now i really understand how the direction flows. Big Thank You

jonb

Thanks so much for clearing all of that up. Nice touch adding testing procedures as well.

SolidVermillion

Thanks for all your helpful videos man. I think if they rattle they can still be bad. Someone told me you you should only be able to blow one way through the valve which lets you know that the valve actually does have enough spring tension to hold it closed.

RC-Heli