Positive Crankcase Ventilation Explained. PCV Valve

Gas Diesel Differences
• Gas vs Diesel Which is...

[@erhanelgun2302]

The ultimate video about pcv system on youtube

[@user-ly5vk4gt9c]

The best explanation ive viewed..thanks much

[@1wisestein]

Wow what a great video explanation for both diesel and gas! My Volkswagen Jetta 2001 TDI (the ALH diesel engine) has a pcv valve on it on it btw. One of the most efficient and reliable engines ever made by VW probably. It’s definitely a valve though, I’ve taken it apart and there’s a membrane in there to make sure air only flows in one direction. It connects from the valve cover to the intake after the turbo compressor but before the intercooler. My guess as to why they thought it was needed on the diesel is because the boost pressures can fluctuate between positive and negative pressure depending on the RPM and if it’s in limp mode.

[@tlaicontact]

You are the best professor so far in explaining how PCV valve works! And also why it is called POSITIVE. Maybe you could also do a video about how to fix high oil consumption. I have a 2006 RAV4 which consumes a quart of oil for every 300 miles! It is a well known fact with 2006 to 2009 RAV4.

[@StefanKrunic]

That is a GREAT explanation. I"ve been looking for this for a long time.

[@nickako]

Thank you so much sir for all your informative videos and sharing your expertise and ideas with us.. God bless you and your family..

[@MrDIYer]

God bless you too and your familiy

[@countrywideroadsideassistance]

Great information and well presented! Thank You for putting your heart and soul into the presentation to explain the Blowby and PCV valve’s functions positives and negatives! Thank You!

[@Lucentlens]

What a fantastic explanation!!

[@balam8743]

The best PCV valve there is on KZbin. I upgraded my diesel engine with a bigger turbo and was worried about the excessive blow-by and wanted to add an oil catch can but didn't get a good answer or explanation from other videos. Thank you for your videos.

[@spaceboundmg]

Thank you for this easy to understand explanation!!

[@king-pc8fz]

Thanks for the information excellent tutorial on this topic. Keep up the great job !

[@dennism5245]

This was one of the best videos I have seen, 👍

[@AbuDujana692]

U are awesome in explaining and let me tell you that I did not find this much of information on PCV system despite going thru bundle of KZbin videos

[@mkatalin09]

best video on youtube about pcv valves

[@grahambrown3718]

Fantastic explanation, well done 👍🏻

[@anselmojoaomassingue2361]

Thank you so much. In 2 days I learned a lot, and I happened to have a problem with my car that your videos helped me to solve. Didactic explanations, even a layman in the field would understand and can use to personally solve their mechanical problems👌👌👌

[@jacob-no4tf]

Wow. thank you very much , that was a complete explanation wich answer all the questions

[@floorpizza8074]

Fantastic video, thank you!

[@Anthony9592]

Just brilliant... I am grateful to you for life for sharing your knowledge...

[@MrDIYer]

Thank you for watching.

[@bellybell542]

Wow!!!!!!!!! Very good educative video

[@user-hs2hl1dz1b]

Perfectly explained

[@ibrahimolamide5065]

Wow very good information, I enjoy your video

[@abdelhakhadji9992]

U are a great teacher sir 👌👌👌👌

[@itsteve4009]

wow! nice, informative content, keep it up

[@FoxADV]

Loving your work!

[@MrDIYer]

Glad you enjoy it!

[@SA-hk8xj]

Excellent video 👍

[@richardjones38]

Your explanations of PCV and EGR are very good. Concise and easy to understand. I make parts for engine conversions, and always recommend that customers leave these systems as they were designed to be. However, I'm also sure that many of them don't understand the function and purpose of these systems. Would you mind if I include links to these videos on my web site?

[@MrDIYer]

No, not at all go right ahead. Thank you.

[@PLISNO]

Best video ever!

[@lowbrowgaming2894]

Outstanding !

[@stephenamejado6172]

I suggest on installing occ make sure it is ventilated well, i use occ just like you have but i make hole at the brass filter and put stainless steel wool., so far so good, make sure it is ventilated well. You’re right the shorter the hose the better.

[@ahmedhacene9973]

Very good explanation

[@Mewanrahnam575]

You are the best

[@robbymartin2288]

Thank you for sharing

[@dickschottky9406]

Thanks!

[@kelekilla]

New subscriber!!!😊

[@stephenamejado6172]

To make it sure, test the psi level before and after installing occ

[@peashooterc9475]

Great presentation. 2:09 Willys Go-devil L134 for a 2 wheel drive application. This engine was one of the first to employ the PCV system on military vehicles. In the 1960's PCV's were added to civilian cars to control emissions. The PCV also prevents an engine backfire from traveling into crankcase.

[@markallenarcano9439]

Present Sir 🙋

[@sogoals1929]

You enlightning me sir.... ill subscribe you.... 👌... Now I know the reason why my dad put the breather hose of his diesel truck into his exhaust pipe... 🤫 ... we dont have emision laws here...so its fine... 🤣 ....

[@soufbel3455]

My hero 👍😀👍

[@bjnopoli]

My 1976 alfa romeo has a factory oil seperator can. It has a small hose from the can to the intake after the throttle valves. Them there is a large hose from the can to the a cleaner (this one take over when the throttle valves are open) There is also a hose going from the can to the dip stick tube for oil return and of coarse a large hose from the valve cover to the can. However there is no positive crankcase air going back Into the engine and there is also no pvc valve to regulate positive pressure. I assume this set up has constant vacuum.

[@CosminRotaru]

But i should still see a slight vacuum if i remove the oil cap on a diesel engine, right?

[@suvijsuvij9330]

I have a Polo 1.5tdi diesel engine. I have to remove the top plastic casing due to a breakage of a injector holder screw. I took out the screw and fitted it back. Everything is working good now. But so I have to use any paste and seal the plastic case to prevent any leakage in future. I haven't noticed any paste stains while removing. Another question is I found diesel on top of my injector holder. But when I removed that diesel and tried accelerating on a high rpm, I couldn't find any leakage on common rail, injector input pipes or injector return pipe. I tried accelerating the car while at rest few times but can't find any leak. I found this diesel after driving for 45mins. Could you please advise on how the leakage might have happened.

[@amazonsk7751]

That's a lot of useful information. following up on my comment about OCC. My idea was to point the blowby exhaust down like you showed. Since it needs vacuum to be pulled out, what about if I did 3D printed OCC or just dump hose that would have a fan or something to pull the blowby out?

[@MrDIYer]

I supposed you can try to do that.

[@justme-ve3oj]

new subs here

[@khanshamim38]

Does pcv valve has vaccum at idle?

[@armandomasa7221]

sir its ok to take it out ah breterhose to intakemonifold down into the transmission diesel engine my car..thnx to advice me it is god or bad to the engine

[@giman4380]

what if diesel equipped with turbo - still pcv is not required?

[@jessiebecares557]

sir diyer....can i remove the breather hose fr. valve cover going back to intake manifold ? just because i noticed sometime when i was removed the valve cover together with the breather hose,It Has a OilMist going out to breather hose ang going through to intake manifold to combustion chamber...what if i remove the breather hose and i close the hole to intake manifold to prevent dirt air sunction.. and the other hole fr valve cover is remain open...my goal is to prevent dirt fr. oilmist going through to the throttle body... Mr.DIY...what are the Advantages and DisAdvantages....2003 HondaCrvGen2K20engineAutomaticTransmission4X2,85tkilometerRun....ty and i hope you acknowledge for my concern...Jessie fr.Philippines....

[@christophergraham9726]

Are you saying diesel engines do not have a pcv valve?

[@januarioqueiroz3122]

😊👉👍

[@luluflengchannel8114]

idol, kng iincrease ko boost ng 4d56T mas better?

[@FrankieCA99]

Sir i just bought a motorcycle v twin and oil is pumping through the crankcase vent, im thinking about installing a PVC at the end of the hose, is that okey ?

[@stephenmaas8775]

would tou not be better fitting an oil catch can?

[@reybernadez7701]

Sir saan ang location ng pcv valve ng Nissan sd23 salamat

[@niloyu105]

Keep watching and support especially 45sec. Ads from Al Khafji Saudi Arabia 🙏

[@mohmadJO]

Hi sir My 4d56 engine is good no smoking no hard start and no oils loss but I see some oil in the air filter box com from breather pipe why?is it normal or not and how can I fix and big thanks to you and sorry my English is not good

[@MrDIYer]

If ita not too much then its normal because blowby has oil in it.

[@N1Zer0]

Wala na. talagang overhaul nalang solusyon pla ng blowby ng 4d56 ko. L200 1997 no turbo.

[@cuvame]

very very good explanation sir. but may I ask what makes more carbon build up? because of EGR or Crankcase gases? or by removing either 1 and it would reduce the carbon.

[@dingdingding4033]

Yes

[@terry9397]

The crankcase ventilation system is the one that carries the oil vapour, which is where the carbon comes from. The exhaust gas recirculation (EGR) system then bakes on the carbon oil vapour in your inlet, because of the high temperature of the exhaust gasses.

[@cuvame]

@@terry9397 so removing the crankcase recirculation is better? What is the downside? I plan to put a filter and try to vent it to the atmosphere

[@terry9397]

@@cuvame Depending on where you live, it is generally illegal to vent straight to atmosphere (as it is untreated). Most people advise using an oil catch can (OCC). The OCC fits inline with the crankcase ventilation (CCV) system, so catches the oil vapour (which then turns back to liquid). You will have to periodically drain the OCC as it fills up over time (catches the oil vapour and crud that would normally be refed into the intake). As for it being better to remove the CCV, well it depends on which perspective you take. Dumping untreated pollution to atmosphere is a downside, however it does remove the issue with carbon buildup within the intake. I personally would go with an OCC.

[@cuvame]

@@terry9397 what I plan to do is using an OCC then venting it out hahaha thanks for the insight. But what bad effects does it make to the engine?? Will the excessive pressure of the crankcase destroy something in the engine? What I've read, as long as the car is moving, the pressure is being sucked out by the force of the car moving forward. That was my biggest fear. That the intake is a big part in sucking the pressure out of the crackcase.....

[@Gettingjiggywithit228]

What if there's a white smoke in the oil disptick? (Diesel engine)

[@stephenmaas8775]

means you either have to try a higher viscosity oil as your pistons are warn slightly or damaged and letting burnt gas through where they not supposed to be. either a big job and alot of money or you could try higher viscosity oil to seal up as best as can or sell car

[@stephenmaas8775]

Maybe a treatment for it these days that might help a little. I seen something on coxmotorparts not sure if it was a liquid molly brand for like £30

[@MrDIYer]

THIS IS WHY I DONT INSTALL AN OCC OR OIL CATCH CAN kzbin.info/www/bejne/nnXbYWyspLmfmNk

[@jarkazoki]

Hi,i have Fiorino 1.3 Euro5 with 75hp.I have problem , when i startup car ,engine run ok, after some minute 3-5minute i have blue smoke.I have check 3 times injector(in Bosch servise),new timing chain,new glow plugs,new DPF.Oil is always on max.Colant is ok.I have clean EGR,Intercoler,Intake manifold.When car litle get worm all is OK.Also I have buy new MAP,MAF and new oil separator.Can you please help me?Thanks

[@cri1410sti]

check the compresion

[@jarkazoki]

@@cri1410sti hi,i have checked...its ok compresion

[@stephenmaas8775]

try oil little under max? maybe you have a bad pcv valve and pressure is pushing oil up past pistons and mixing with your fuel burn?? I'm not a mechanic😅

[@stephenmaas8775]

but that would mean you have more issues!😂

[@MrDIYer]

WHAT IS BLOWBY? kzbin.info/www/bejne/l4OsiqePpbtofsU

[@alla8226]

Very helpful thank you very much are you from world war 2 like you said in the movie i am from my hometown where i live can the valve be a bad connection with both of us learning magic and cast spells on them

[@alla8226]

I have a peewee see-valves on or in or near the middle of the back and on the front side of the connection does under or with or at or it can be beside the case with the top corner near the back facing towards the intake inlet indent incence hold the spring firmly with both sides correctly while over both the top rightside of the back of the actual unit or follow this link to finish, i hope this was helpful and are you able to thank you.

[@ohnemar4285]

Wrong. There is a throttle valve with a complete throttle body on diesel engines too.

[@MrDIYer]

Lol

[@MrDIYer]

Obviously you are one of those just because you saw a single video or had a single experience thinks that you know it all. Lol but if you watch the video carefully which clearly you did not what you claim to be wrong has been explained. Lol but if it helps you feel better, im wrong and youre correct. Congratulations! Lol

[@cri1410sti]

that throttle is for helping combine gasses from egr

[@stephenmaas8775]

​@@MrDIYerdoes the EGR in a diesel tend to clog up more than in a gasoline/peteol EGR

[@MrDIYer]

@@stephenmaas8775 more than likely yes. Because diesel burns dirtier than gasoline.

[@alla8226]

Thank you for your video i hope it wasn't windy today and i am very ticklish but i will not kiss you on our first date unless you are a very very handsome fellow also if the topside on the corner is the valve on or near or in or close to or located across the intake manifold then are you going to tell me your secrets my secrets are very shiney and have been cursed and now i can't find them unless you are the gate keeper or my naughty uncle busy fingers and a wizard but shhh, i hope this was helpful links in the description

[@alla8226]

Every 60 seconds a minute passes You will never be alone when in the company of others If you slip and fall because the floor is slippery then you are just clumsy Two halves combined equal the total or twin halves combination Travelling 1000 metres is approximately 1 kilometre exactly Every half a kilo is 500 grams

[@alla8226]

You took my breath away from the song