I have been a mechanic all my life and I never knew this trick I love learning every day thanks !

Thank you for you elucidating video Sir ! Many reasonably mechanically adept folks I know could not explain the operation of the PCV system, & I will recommend your video to them. Cheers!

You are a great communicator. The number of times that you said the same thing burned it into my brain!!!

One world = Brilliant! Sterling work Sir. Very clear and very much appreciated.

Awesome lesson !! Teaching us everything exactly the right way to get strong in the profession. It shows how much you care - for our sakes . So good of ya ! It is invaluable .

Reminds me of my science teacher from high school. Rest in peace. I used to love his teachings.

I like that you keeps it simple answering almost any question we might have about the pcv valve. 👍🏿

"Paaaper muuuust stiiiick" 🧟‍♂️ Thank you for the video, señor! Extremely informative!

I just did this test in my Chevy V8 LS3 because I was suspicious about something wrong with the PCV valve. Test resulted just as in the video. So, PCV valve is ok. Thank You very much for sharing your knowledge Sir!

Unbelievable teacher - thank you for your dedication to knowledge

Great teacher . I liked the way you explained the pcv function.

This is the definitive test for a pcv valve. I have two cars that failed - both that passed the other usual test. I was able to clean the OEM valve better and get it to pass this test but the other ( aftermarket) would not despite it only having around 5000 miles on it and after cleaning to what seemed like new. Lesson for me is use only OEM and also to check frequently. The one l was able to get working was on the car that l only have 50 K miles on. Thank you for the great tip.

Excellent video! I always wondered what the hell the PCV does and now I know. I've always replaced it on my Astro van and my Lexus GS 300, but I never knew why. I like how you explain things clearly and succinctly. And your wit and dry sense of humor are terrific! 😊

Excellent demo .very important information I learnt today. Thankful to you professor 🙏🙏💐💐👌👌👌👍👍👍

I knew of the importance of the pcv valve, I didn’t know about this simple test, and yours Mr. is by far the clearestest’ of the explanations. Thanks o lot.

Great job , your total explanation in each phase of the PCV cycle helps the DIYer understand and Not memorize, that's what great teachers do, thanks I'll be checking out your future videos!

P E R F E C T L Y EXPLAINED! CLEAN & CLEAR! Thank you for giving everything from you to explain as good as possible! Really really helpful!!!!!

Thanks for making this, I genuinely feel like I learned something!

I would make a patch that says "ACE" because you aced this explanation--- funny and infomative. Good way to teach. Now I understand why my local shop told me I had a rear main seal problem... not serious yet but potential.

it can't be more clear. thanks a lot man. its really nice to see people who take the time to make this videos and explain them this well.

I just did what you advised and di it it on my 14 RAV4 ,when after start/hot engine condition the paper would not hold even I pressed it, after changing the PCV it holds on and the engine now run at idle smoother. Thank you so much, hope you'll continue and share more Auto vlogging tips.

I have never seen this test before, I'm actually impressed and surprised that this isnt more common a test; best part is this test is so darn simple and inexpensive yet so effective.

I've been addicted to KZfaq for about a decade. Watched (at least) a thousand videos. This is THE best thing I've see..............by far. THANK YOU!

I just purchased a used 2017 Honda Accord Sport 2.4L Inline 4 cyl. This is my 1st time owning a modern inline 4cyl... I was told to replace the PCV valve every 30,000 miles. Seems reasonable enough, as the PCV valve is very easy to replace on this engine. Thank you for explaining the reasons for this important maintenance!

Excellent information about the pcv on the car engine, How it works and it's function.. well done.

This could have been explained in 5 minutes!

Thank you very much. Knew about pcv valve but not its importance to such an extent.

Best video ive seen! Simple and very informative.

Man!! I just subscribed to this channel. Thanks man really appreciate it you sharing your knowledge. I’m a DIY on my vehicles and this kind of information helps sooooo much. Again thank you 🙏!

Well done with your professionalism and very important educational experience, patience 💯👍the right way

Thank you for demonstrating. Awesome! 👌

So far, you make more sense than any other person I’ve listened to. Thank you. Have subscribed, and liked.

Thank you for this video! Super clearly understandable. I wait for your next videos.

I inherited my dad's truck recently. It's a 2003 Dodge Dakota SLT he bought in 2005 with 16k miles on it. It now has 235k and still runs great even though she smokes just s little, still smooth as ever but noticed when i chsnged the plugged up pcv valve the engine was quieter overall once the notorious lifters got in harmony and finally settled down 😂 but yes overall the engine is now quieter and i am noticing cleaner oil coming out every 5k mile oil change. I am currently driving it daily without concern that its a 20 year old truck. I wasn't aware of the importance of keeping the pan oil cleaner. I did understand the recycling process to reburn as all my cars got new pcc valves each year or 2 anyway. I appreciated your genuine desire to get this point across and i enjoyed the patch part 😂

Jefe, you have plenty of knowledge to share and for that I am grateful. Thank you.

Very good video learned about PCV Value system, thanks a lot.

Great information. Engine oil and engines themselves literally doubled immediately in mileage because of the use of PCV's. A clean engine is a happy engine.

I really enjoyed listening and watching your video. I learned something new. Thanks! Just subscribed!!

Thank you for the excellent video Sir !

OMG , the tone & the emotion ! Great video I just laughed my ass off through it with the way you explain 😆👍

I have a 1972 350, small cam, headers, mid rise intake, 600cfm carb. Head work and bottom end work (decent hp, lots of TQ, and this one is particularly high in compression 10:5:1 before head work and bottom end work )I'd put it at about 400hp at the flywheel because shes got alot of miles since the build, I'll promise you can't turn it over by hand with just #1 plug out. It'll break the crank bolt before it will. It spins normally with all 8 out. I'd say this engine was overhauled and put in sometime around the year 2000 it was in service for around 10 years, parked for 12, deteriorating outside, years. Before I bought it and put it on the road. It had been running bad since I bought it I timed it, didn't fix it although it was out of time. Replaced all vaccum hoses and pcv, didn't fix it. Adjusted carb and all settings, didn't fix it, Broke the new pcv I installed, so I had.to replace it again. Didn't fix it again. It was a specific kinda miss. I tune with a vaccum Guage and tac. I was getting a very lean fuel mixture, very low vacuum reading, and It was idling wayyyy too fast v I had it running good as hell, but not performing. Mind you this car sat for 12 years, and when I put it on the road I fixed anything I deemed "unsafe" such as tightening things, and making sure nothing is going to get into anything I did not build this engine, I did not put it in. I changed the oil made it run and drove it because it was fun. After doing all that work a while back... I did something naughty.... Something "forbidden" ........ I stuck a breather cap in my pcv valve grommet to match the other side which normally pulls from the massive vaccum leak known as a positive control valve and I plugged the nipple on the carb so it would volume of something a CARBURETED car desperately needs for economic reasons such as fuel economy... vaccum. A PCV basically "sucks" all the time, as a vaccum leak does. It's just controlled inside the carburetor. Not tamed, just controlled. Technically, you're putting sludge in your fuel system this way on most vintage cars.,you're sucking motor oil residue into a ethanol fuel that already hinders performance and causes power loss, engine wear, and dosent spark very well in older ignition types. And you're mixing this ethanol and oil into a less grade fuel than is already to weak for combustion I'm these old v8s and even straight 6's thus causing a lean mix, not because of your settings, but because 87 octane just dosen cut it. I believe 98 was the standard for octane in the old days. It went as high as 240octane at special fueling stations and race track use. It was also lead based until the late 70s/early 80s with lots of additional additives for combustion. The first generation small block chevy was designed with a vent tube at the back of the top of the block and a breather oil neck in the intake, it was front to rear ventilation. No massive leak of vaccum in the valve cover that usually aids in helping create that valve cover that always leaks on gm products because it's pressurized usually on the passenger side. And fess up, guess what? We know it's almost always the back pass side because that's where gm locates the pcv placement from the factory? Back passenger side. EGR too, pass intake (also vaccum) and guess what else? #6&#8 plugs that usually foul, aka, least efficient cylinder.. it's already going to be this in old Chevrolet because on the firing order these 2 cylinders are farthest from #1 (the TDC of firing order) because thats just the way they built them. So you wanna pressurize this head, and pull all the "contaminated air"aka oil through a vacuum leak (controlled ofc) hooked into my intake, that ofc is the thing that makes the vaccum distribute from the crank case to ports ports the carburetor and any intake ports. so it'll get my fuel and air above it, coming in fresh, but only is to get blended with this oilly tainted loop of vaccum leak, to not only then be burned within my combustion chambers, which already won't make As.much combustion because the octane grade is poopeykaka for my ancient engines need for the fuel to burn hotter, hotter with less flash time and or length of combustion. And bit of a camshaft cresting less vacuum than before, it needs as much as you can give it and it's real design was made pre emissions so basically it created vaccum up top and the byproduct went out 2 vents in the engine Since I took pcv valve out and replaced with twin valve cover breathers. .. I haven't had sluggish throttle since. Fuel economy went up, Idles better, Downshifts and upshifts better. It even *rides smoother* Idles properly, and will pin you to the seat in 3rd gear whereas before it was gutleessly slow and disappointing it wasn't until the pcv valve was removed did I get true improvement. Cabureted cars don't need pcv unless they have all their original emissions control equipment in tact. If not ditch it for a breather. Its important you have the breathers on BOTH valve covers. You want to optimize how much ccp can escape through these holes by gravity and force of engine. If you do this you'll have dirty valve covers. Its a small price to pay for not having that buildup of grime on tbe vakve cover inside your intake and cresting carbonous sludge in your valve train and head internals I will never waste my time with a pcv on a modified classic again. Keep putting them on cars with ecm tho that's fine, just don't destroy the internals of a old gm engines all we got left is what's left of gms original casts. That goes to every mfg. business. That crested casts too suit out future

I will never forget this trick, thank you sir! How would you set up a pcv system with a centrifugal style supercharger?

Watched your loooong story to the halfway point and thought that this simple idea will save me a lot of time setting up my pressure transducer and the oscilloscope. So I stopped went to the car and tested, wow it fluttered and I thought I had found my source of oil consumption. Ok watched the second half and you guessed it probably, it’s a 4 cylinder Nissan. Darn, but what is interesting now I did pull the hose and the car stalled, tested and had good steady suction on the hose. Next I put just the valve (cleaned it first) into the hose and the car did not stall any more. Now the final test I held the hose without the valve directly onto the crankcase and the paper stayed on the oil tube. So I guess the filter is more restriction than necessary it seems. Interesting Video, looong story but you got my thumbs up for the content, Bernhard

Very well explained. We need more content!!

Passing automotive service excellence tests can get you some patches. It costs you time and money, but it helps get your working knowledge into relatable and comparable language and ideas to relate about service, repair, and maintenance. I believe, when we aren't manufacturer/factory trained, these tests help us see who has been through the testing successfully. The unfortunate thing is, you can study their literature and take their tests without repairing or building anything. Your ability to relate these concepts to another person is valuable. Experience takes book study and makes it into good thought. Now let's not sound condescending in our method, but matter of fact. I have discussed the system you covered in this video with some "mechanics" and heard some ideas that don't fully make sense. It's because of the mode of the throttle. The Chilton and motor manuals depict this system also and include diagram drawings with the different modes. It answers why we had CCV filters in the air cleaner connected to the breather tube side. Just wanted to give more to those who need to study their manuals and understand. Many with experience know from repetition and observation.

This guy talks to us like I talk to my 2-year-old...😂

You were fun to watch and listen to. Thank you for posting this video. I'll do this test this morning and see if my 4 cylinder Focus. passes the test. To be honest, however, I change out my PCV valve every year, just because my grandpa told me to years ago.

Very informative video, and about the patches at the end…that was hilarious!

I have a Audi 4 cylinder turbo with great negative pressure. Even when it was stock it was amazing. Was stock 2 years. For thr past year it has a big turbo upgrade and more, pushing over 500hp (yes 4 cylinder). It’s a 2015 with currently 212k miles. Stock internals . Runs amazing.

This video is genius, genius. I have never seen or heard better and simpler and so concise in essence. Thanks for this video.

I learned something new today, thank you.

Well I learned something today. Thank you for taking the time to make a video you are very knowledgeable and have a great sense of humor

One of the best educational videos I’ve ever seen. You’re an exceptional teacher!

I'm afraid the paper 'stick' method only tells you that the PCV valve is open, creating a vaccum. Unfortunately, the PCV valve can still be bad and still 'stick' the paper- in the case of it being stuck open when it's not supposed to be. (Creating a vacuum leak instead). I have a 2007 Hyundai Accent with misfire, one of possible causes is vacuum leak from bad PCV system. Hopefully that's it, I've seemingly tried everything else! It's a cheap regular maintenance part anyways, so I'm not even gonna test it- just replace and be done. Great video.

Fantastic lesson on the PCV valve. Thanks!

EXCELLENT technical and humourous video. Do more.

Bro you just taught me so much - subbed!

The PCV valve should allow a lot of flow when manifold vacuum is low- as in when you are accelerating heavily, and should only allow a small bleed of vacuum when manifold vacuum is high- such as idle and low load running. Positive Crankcase Ventilation is the crankcase gases from combustion leaking past the piston rings and such from not just blowing out of the crankcase on their own but helping to draw the gases out and also feeding them into the intake so they can be burned. Helps out all around I've never seen it quite so exaggerated

Love this presentation and love the character. Liked. And take all my hats off. Well done.

Awesome Teacher!! I will remember to apply this paper test on all vehicles I work on.

THANK SO MUCH JORGE, , I LEARNED MORE ABOUT PVC THIS TIME, HAVE A WONDERFUL DAY.

He's talking to us like we're all dipsticks!

i learn a lot . Thank you sir.. Youre right! i feel exited to test my engine.. its a Toyota 4k engine, and today im gonna test it and clean my pcv valve.. Youre explanation is very clear.. Thanks again..

I love this channel. Helping a dumb ass like me learn how my engine works, avoid expensive repairs and even get my hands a little dirty. Please keep these videos coming 🙏

Learned a lot from ya’ ! Thx 🙏🏼 I liked the humour at the end ! You are a total A.S.S. Adroit . Skilled . Solid. 🏆 The world needs more coaches like you . 👍🏼

What are your thoughts of a pvc delete? To be more specific, installing an oil catch can and venting off the remainder as apposed to recirculating? Can modern cars with their computer and data demands operate properly with such a modification? The path that has brought me to these thoughts and questions is modern direct gas injected engines and the troubles associated with that. The carbon and dried oil build up in the intake manifold and the problems associated with that to be exact. Problems that I'm still learning about and trying to grasp. Are oil catch cans an answer and should they be vented, or recirculated? Your knowledge shared would be greatly appreciated.

You are wonderful, in knowing what is what. I am 71 years old with a 1966 Sunbeam Tiger. I know a pro when I see one.

I had a 1991 Toyota Camry (SV21) 2 litre engine. It came with Positive Crankcase ventilation problem. It was pushing oil out every seal & gasket of engine. My friend/ retired mechanic helped diagnose it. I had to track PCV blockage. It was this stupid reduced PCV pipe into throttle body, that was curved like a J. It was caked solid with carbon and solids. Once cleaned/drilled out. The engine didn't push any oil out seals and ran well. I learnt this issue way back then. Lesson learnt. Always look at the PCV pipe lines, for good design with good diameter into the inlet manifold port or throttle body assembly. Shared bends and small diameter pipe causes necessary action with higher maintenance

My 2012 Euro Civic (136000 km) consumes a little more oil than my wife's Euro Civic (2007, 210000km), i'm going to to this test on both cars. Greetings from Belgium!!🏁

12:50 One more important exhaust gas: H₂O. That definitely doesn't belong in your engine oil! Loved your clear and emphatic explanation, thank you. On a 4-cylinder engine, would pinching off the breather hose allow the paper/dipstick test to work as on a larger engine?

I have a 1986 305 Chevy,( in California!) It's got more smog system's to be analyzed than I believed possible. But this is a good place to start. Now all I need to do is rebuild a computer controlled Q- jet,swap in an RV cam and get my mind examinerd. Thank you

I like this guy's deliverance. The audio is good and his way of explaining is very informative.

Thanks! I was just going to change my PCV valve ($50 for the HEMI). My paper stuck, so I'll probably be okay to wait a bit longer?

Love this guy! he is like the Cheech and Chong of mechanics

I have a 2012 Acura RDX, turbocharged, 4 cylinder. It will be interesting to see if it makes the paper stick or flutter. This is an excellent presentation with, helpful information. Thank you!

Dude definitely just came back from smokin a fatty. Good 👍 info

dont know what he smoked but I want some

Just drive without oil dipstick and problem is resolve..

you learn something every day. Thank you.

The lecture was 💯 percent on point, whether the video was long great for people who don't know much about cars or mechanics. Ty buddy.

Oh Boy, you never want to piss off the Wizard.....Great Vid....I'm hooked!!

Very informative, and nice tip with the “paper stick” idea. Im not a mechanic just doing research like any other person trying to figure out their car issues and I appreciate your teaching method.

Thanks! I learned something new. I love your patch!

Most acurate information on pcv valve I’ve com acrosss yet keep up the good work accuracy

I want to buy pot from you cause you obviously know where to get the good stuff!

Very very informative thanks to you sharing it... More power to your channel...

Very helpful as I’m trying to figure out why the runners in my Corvette’s TPI intake are oil coated after only 300 miles of driving. I will have to try the paper test!

Wonderful, repetition instills rememberance, Thankyou!

The dipstick paper trick is new to me, thanks. Usually I do the oil filler cap. (I had one MB diesel that would throw it far, up and away!) Now as to 4 cylinder engines, I counter-argue as mine is in a 1994 Volvo 940 (design hasn't changed much since it was put in passenger cars around 1964). That b230f is a durable, yet underpowered beast. Thanks again, I'm going to do the paper trick to my gf's 2007 Honda fit.

Very impressive and informative. Thanks for sharing! 💯

Informed helpful advice appreciated. He does patronise, repeat, labour each point as if WE are incapable of grasping the point. At first I found him too much but wanted the info so carried on watching. I’m not surprised there’s a student backlash. As a personality he’s certainly forceful. I liked the video and subscribed.

On the Up side: I'm headed outside to do a paper test right now... Thank you soooo much for the video ! 😄💙💐 On the Down side: That sing-song-y voice u do when u repeat yourself 40× does make me want to modify your patch a little 🤐🪪✂️ But I think the good outweighs the bad so I appreciate the video lesson!!

Thank you Sir for this Video its very informative and precise!You are truly veteran mechanic

Excellent work my Friend! You explained it for the people that do not understand and you also explained it in a way that anybody that has a disability or difficulty listening or comprehending. They are now able to understand it way to go. I applied you. Excellent work!

Awesome video sir! A mixture of fine humour and vital information for me. Feel good and create many more lessons!

This genaration needs Mechanic like you. You are a good Auto Tech instructor.

Sure wish I learned from a professor like you. I understand a lot, I don't know how to explain things. Thank you sir for your video

This is a very good video! Complete, thorough, and clear! Thanks!

The old school mechanic tricks, Very Nice.👍🏾

My experiment. Back in the late '70s, being young and bright (read foolish) I thought I'd "improve" my car by converting the PCV system to a road draft system. I plumbed a good-sized tube, with a diagonal cut, to the bottom of the car and replaced the PCV valve with this. After a week or so, I took off the oil fill cap and was greeted with a nice yellow blob of gunk. It was the sludge of water from the blow-by not being purged from the crankcase. I undid my "brilliant" conversion right away and never looked back. Yes, PCV systems do wonders for keeping the crankcase clean.