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

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

Рет қаралды 872,316

Күн бұрын

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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Please Consider Supporting My Channel at : / rnwdue to factors beyond the control of Ratchetsand Wrenches, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. Ratchetsand Wrenches assumes no liability for any property or personal damage that may arise from doing a repair on your vehicle after watching any of my repair video's. Due to factors beyond the control of Ratchetsand Wrenches, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Again Any injury, damage or loss that may result from improper use of tools, equipment, or the information contained in this video is the sole responsibility of the user and not Ratchetsand Wrenches.

Пікірлер: 344

@vijayam1 2 жыл бұрын

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

@MR-nl8xr Жыл бұрын

The part where he mentioned how the pressure from the Crankcase travels through the Oil Way Tubes (that normally run from the Valve Head section down back to the Crankcase base/Reservoir to get resent back to the Oil Pan) up into the Valve Head section is what did it for me. Never understood what a PCV is doing on top of the engine head if the Crankcase is down below.

@pnswg01 8 жыл бұрын

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.

@spelunkerd 8 жыл бұрын

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!

@cedricthompson4602 6 жыл бұрын

spelunkerd o8u8o8k6

@afundou 6 жыл бұрын

and why bad working makes engine pipe smoking?

@ironfistarrival 6 жыл бұрын

Does Nice Blow Jobs , i guess !

@timanderson9466 6 жыл бұрын

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

@bradford_shaun_murray 2 жыл бұрын

1990s cable tv style.

@juperrr 2 жыл бұрын

@@bradford_shaun_murray Exactly dude.

@RC-Heli835 7 жыл бұрын

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.

@chocolate_squiggle 4 жыл бұрын

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.

@jimdandy6472 9 жыл бұрын

Good explanation, diagram and demonstration.

@ll-yj6rh 4 жыл бұрын

What happens if there's oil in the air filter box tube before throttle body

@phantasmagorezzyzx 5 жыл бұрын

Great explanation, easy to understand! Thank you!

@virc4541 8 жыл бұрын

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

@davidsimmons177 2 жыл бұрын

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

@jonb4667 4 жыл бұрын

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

@bimalkumar7952 9 жыл бұрын

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

@riblets1968 2 жыл бұрын

Just the information I was looking for! I understand the basic principles involved but I didn't what constituted valid testing. Thank you very much, sir!

@Stumpy77 Жыл бұрын

Great video bro - no messing around, clear explanation and valuable info.

@samiuddin6696 2 жыл бұрын

Excellent experiment for how to check PCV for its function. Jazakallah-o-Khair in this world

@juperrr 2 жыл бұрын

Pretty good explanation. Thank you !

@Chezilla 3 жыл бұрын

5 Years later, still great info! Thx

@shaneavalon1392 5 жыл бұрын

Very helpful info as usual.. quick question.. does a faulty pcv valve cause increase fuel consumption.??

@nahid1981 4 жыл бұрын

best explanation so far I found about pcv...thanks. Keep up the good work.

@waqarahmad9548 4 жыл бұрын

As always, very informative. U r a genius.

@SolidVermillion 7 жыл бұрын

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

@drudown3285 3 жыл бұрын

Just changed mine. The old one had no rattle and no bounce inside. Glad I changed it!

@francogalloso2167 5 жыл бұрын

Good explanation of how pcv works. Thanks.

@RichardFanders 7 жыл бұрын

When you open the throttle body there is no vacuum after the throttle body, there is actually positive pressure sometimes. There can be a vacuum before the throttle body at WOT hence why there is a breather before and after.

@tokgaenz 5 жыл бұрын

thank i like all your educational video , i learn many from it , i fix my good car and make it not working

@crbourret 5 жыл бұрын

Is it possible for the valve to get stuck open? And if so would it cause increased oil consumption?

@ninemimesleft 4 жыл бұрын

Also, would it still have suction if it's stuck open?

@luislarriu3381 6 жыл бұрын

You do a great job explaining things in detail

@abdalqadr1 3 жыл бұрын

Smart man thanks for you from Iraq

@MrBow54 9 жыл бұрын

As always great video The best to you on this holiday season

@myRatchets 9 жыл бұрын

Thank you, same to you my friend. Cheers

@abacus091 9 жыл бұрын

good job Bro, please continue work hard, eastern Europe fans watching you

@myRatchets 9 жыл бұрын

abacus091 Awesome, we just getting warmed up. Great to hear I have fans around the world. :)

@planet1250 9 жыл бұрын

RatchetsAnd Wrenches I have watched all of your videos. A fan from Italy

@sramirez1906 Жыл бұрын

Very clear explanation. Thanks!

@dogsbyfire 8 жыл бұрын

Very nice drawing. Thank you!

@michaelmorris6575 2 жыл бұрын

Great teaching! Thanks for sharing!

@fidelcatsro6948 8 жыл бұрын

thank you senyor, by watching this video I learnt a lot of mysteries about the 4 darn odd looking pipeline from the cylinder blocks to a metal square contraption above which has an air suction hose from the carbs and another large hose to the breather box on my Suzuki bandit bike, it was a mystery all these 7 years and at least I know some of the basics now, especially that ticking noise when I throttle and its cause! you reckon I can get more ponies out the bike if I dead flange them up completely? never seen that odd pipe in older bikes anyway

@foreverwood1963 5 жыл бұрын

Excellent explanation and illustrations

@nahid1981 4 жыл бұрын

They way you say "hey whats up there.." sounds like you are high...lol... Love your all vids. Thanks for explaining

@princesamuel1 4 жыл бұрын

Perfect and straight to the point

@ortega181956 3 жыл бұрын

great info. job well done explaining the pvc valve operation and texting. Thanks

@passionplanet4471 3 жыл бұрын

Great demonstration😊thanks for the advice and tips

@JUrqui 2 жыл бұрын

Thanks for the video ,good diagram

@AstroVanTribe Жыл бұрын

I just di the PCV valve in my '04 Astro van - The existing PCV valve tested fine BUT, when applying brake pressure when the vehicle was in gear it rattled wildly and was loud so I decided to replace it anyhow ($2.85) it seems to have solved my issue

@pidgeiam4979 8 жыл бұрын

Great explanation. Very clear and understandable. Thanks very much, Pidge.

@myRatchets 8 жыл бұрын

+PiDGE IAM np, glad you liked the video. cheers

@hiramcastillo7137 4 жыл бұрын

Perfect...no body shows it better bless

@vasmajority45 5 жыл бұрын

Could you explain how the blinker fluid works

@gdzeek 5 жыл бұрын

hold the bottle above your head, hold your eye open and slowly squeeze on the bottle while holding it just above your eye

@MidwestDIY 5 жыл бұрын

@@gdzeek I tried and it worked

@gdzeek 5 жыл бұрын

@@MidwestDIY contact lense users rejoice!

@r.s.customz1502 4 жыл бұрын

Ask a blonde chick driving while texting lol

@irineosahagun1228 9 жыл бұрын

Interesting and Educational video. Furthermore, may I ask if a small piece of pcv grommet which fell inside the port could cause problem in the future?.Many thanks buddy. Have a nice weekend. God Bless.

@SlikLizrd 2 жыл бұрын

YES. Broken pieces of grommet can cause plugging of oil passages. SOMETIMES, you can suck 'em out with a vacuum cleaner. Good Luck !!

@mateoseriosajr1022 5 жыл бұрын

Its normal if u see some oil in the hose when you remove it from the pcv valve?

@reiannaidoo 7 жыл бұрын

I just love your videos. Keep up the good work, you're doing so well.

@sunilayya8948 3 жыл бұрын

Best explanation i have seen on this topic . Can you suggest a pcv valve replacement interval for a gdi turbo engine. Thanks.

@joshuasingh9720 9 ай бұрын

U der best bro wel done and god bless u

@peterscotney1 2 жыл бұрын

Simple and informative , excellent vid

@tradmanmike3360 2 жыл бұрын

GREAT VIDEO! GREAT NARRATIVE WORK. NEW SUB. THUMBS UP!!!

@tyronewalker5764 8 жыл бұрын

Well done sir.

@myRatchets 8 жыл бұрын

+Tyrone Walker ty ty

@tyronewalker5764 8 жыл бұрын

Just pulled out mine from my 4.7 V8 Dodge Dakota. What a mess, full of oil and gunk!

@shamwaymoonyos9578 7 жыл бұрын

Yep same. Liked and subscribed :).

@DrBleck35 7 жыл бұрын

You did a great job of explaining this.

@hassanwardeh3458 6 жыл бұрын

. Well done sir , Good explanation, diagram and demonstration

@JamesGadbury Жыл бұрын

Great stuff, very helpful

@bravo3541 8 жыл бұрын

Great info, and camera work. Thanks much

@ashleynaidoo6907 4 жыл бұрын

Hi There, Thank you for the awesome videos. You have definitely improved my car/engine knowledge. I drive a volkswagen 1.8T polo gti 9N3. On idle, if I remove the oil cap, should I feel a vacuum?

@wavyjayy1350 3 жыл бұрын

great vid, so if the valve is sucking where you were putting your finger then it should be good?

@jamessahoye1529 6 жыл бұрын

you really explain things good ..keep it up brother.

@Mika30041975 2 жыл бұрын

Great explanation. Thx

@denospyridon3126 8 жыл бұрын

Thanks for explaining plus showing a Toyota Camry cause I have a 2004 2.4 4 cylinder and changed mine and now the car gets what it was originally intended to get the mileage 24 city and 30 hyw. Thanks

@hyundaiatoz-kiavisto 3 жыл бұрын

really good information. thanks for sharing.

@Snudur67 3 жыл бұрын

Excellent video!

@garyr7027 4 жыл бұрын

Well there is a little bit more to it. At idle when manifold pressures are high/"high vacuum," and low crankcase pressure pushing on one side of the valve, and suction on the other side of the valve, the valve will remain in the closed position. As throttle opens, manifold pressures drop opening the valve, relieving crankcase pressure. At idle a pcv valve should be closed, otherwise a vacuum leak is created, dropping manifold pressures, decreasing the valves ability to close. At idle a engine, unless it's wore out, doesn't really require crankcase pressures to be relieved, only at part or wide open throttle, for it is then the crankcase pressures build.

@andrameda1 8 жыл бұрын

Very theral and clear thanks very much.

@giveme10feet 7 жыл бұрын

best pcv 🎥 ever! thx man

@tssci6774 4 жыл бұрын

Many new cars use a fixed orifice instead of the vacuum controlled variable valve. So many people still think it works in the same way but it doesn't. A fixed orifice allows only so much air flow at idle, when vacuum is highest and crankcase gases are lowest. When the throttle opens, vacuum drops and thus air flow across the orifice is reduced substantially. Can you do another video on orifice type PCV systems.

@deaglemeagle 4 жыл бұрын

Great info! thanks for the diagram.

@loi4lifeklite 9 жыл бұрын

Hi!! Thank you for your hard work, very good video... God bless.

@myRatchets 9 жыл бұрын

UnderhooD yw, thanks for watching and commenting. cheers

@scholes6648 7 жыл бұрын

Very imformative...well done......... Kudos

@hphillips7425 3 жыл бұрын

Interesting and explained well👍

@TravisHeinze 8 жыл бұрын

6:00 Is that the common way to vacuu test the valve, with your finger? I have a Ford Focus that I want to test the pressure with.

@damon2692 6 жыл бұрын

Very well explained. Thnx.

@rrazvanell 7 жыл бұрын

To fully understand....the breather tube supplies air from the filter box to intake manifold? Because, when throttling the engine doesn't it create a vacuum at the end of the tube where is connected to the filter box ?

@David-hy9ni 5 жыл бұрын

Your diagram was well explained

@tyronemansoor4813 3 жыл бұрын

Good job!

@michaeldemos6816 5 жыл бұрын

Great explanation, thx.

@dimitrismavromatis8807 8 ай бұрын

Hi. I would like to ask something if the following is true: If you open the oil fill cap during operation at idle and put your hand close to the oil fill hole you should fill some gas pulsations. This is normal because the valve is almost closed. However, when you open the throttle, the pulsations are lost, since the pcv valve opens. Is this a way to check your pcv valve?

@jcstevegigs 5 жыл бұрын

Great explanation!!! Thanks!

@rogerdavis141 3 жыл бұрын

Respect🔩🔧📈 Extremely Helpful thank you

@carslover3509 8 жыл бұрын

very great information thanks friend ... keep the great work

@ralphpittman6361 5 жыл бұрын

Awesome video!! I’m actually running into some oil pressure issues. Decided to test my pcv valve just like in the video but the car did not want to start. Any reason why??? Any help would be greatly appreciated.

@jb6574 5 жыл бұрын

Doesnt vacuum drop when you open the throttle plate

@MarzNet256 4 жыл бұрын

Yes. Increased flow reduces pressure. If you hookup a scan tool you can watch it change in realtime. I use a $20 OBD2 reader with bluetooth and $5 torque app on phone.

@vanessaruiz58 8 жыл бұрын

thank you very much!!!! toyota was going to charge us $70.19.

@heyitschinoable 8 жыл бұрын

wtf

@tardeliesmagic 6 жыл бұрын

Need to do my 02 Yaris v.soon as a preventative maintenance,did my IAC awhile ago and it's worth doing yourself.Thanks for the videos.

@collinnc2001 6 жыл бұрын

Vanessa Ruiz meineke wanted 90

@kiyoponnn 4 жыл бұрын

@@heyitschinoable Typical in USA

@glasser2819 4 жыл бұрын

$100 is a small bite compared to engine seal damages when its simply ignored ... then Honda charges $1200 to "reseal oil pump" seal blown by age + pressure (without addressing PCV cause!) 👍🏼

@beachboardfan9544 2 жыл бұрын

What if you have a drysump oiling system, would this still apply?

@dannyyarbrough915 4 жыл бұрын

Thanks for posting if my Jeep is smoking a little and it's because of a bad pcv valve and I change it will the car stop smoking or is that from the calender, piston ring damage caused by the faulty pcv valve

@ryanmorgan7711 3 жыл бұрын

Thank you dude

@SPak-rt2gb 4 жыл бұрын

Not sure but my 05 v6 Tacoma was missing at a cold start up I replaced plugs and coils all was good for awhile but the problem came back replaced the pvc valve and so far so good hope that was my $6.50 problem.

@RabeaHussain 5 жыл бұрын

if PCV is blocked , oil would leak from the engine ,right?, But wouldn't the blow by goes out the breather side ? instead of leaking from seals or gaskets ?

@eliseotaytayon2024 8 жыл бұрын

great explanation

@BEEBEE159 8 жыл бұрын

Good job. Thanks for making video.

@nhubui7976 8 жыл бұрын

thanks very detail how it is work

@leslieb.7575 4 жыл бұрын

Good shit exactly what i wanted to know

@glowiever 3 жыл бұрын

in small 4 cyl engine it doesn't suck as hard, but it does breathe a lil

@tejanaidu5671 7 жыл бұрын

Thank you I will try it and will share...

@ShadyO-e 7 жыл бұрын

Thanks bro needed this info

@Forged_Garage 5 жыл бұрын

Is it possible to relocate or add an extension where the pcv valve is installed? Because i have a 2009 toyota rav4 2ar-fe engine, and the pcv valve is located underneath the intake manifold, so to access it i need to remove the intake manifold first, alternative way is to lift it remove the passenger side front tire and splash guard to painfully access it, do you think by putting a extension hose will make any issue?

@rickyr7790 4 жыл бұрын

Breather tube is there when wither there is no vacuum, backfire, or boost. It acts as a small source of vacuum for blow by. You always want some vacuum in the crankcase, because the engine will always have some pressure. The engine itself isnt sufficient enough anyway to provide any large source of vacuum for it to be any concern.