Building a Mustang GT: Why & When You NEED A Valve Cover Breather

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[@trnql_noir]

This is one of the best explanations of a PCV system. Thank you for creating and sharing this content

[@dheerajkatoch7399]

Until now most of us thought crankcase recirculation was just a way car manufacturers went by to abide by emission norms,now we understand the role of 2 vents crankcase and pcv and how they balance/regulate the pressure of an internal combustion engine,and the role a one way chk valve on the engine oil cap performs in releasing excessive pressure(which until now was thought to be vented via a crankcase breather) Thx so much Cameron for all the hardwork & research u went through for making us understand this and use this valuable information in our builds :)

[@jpadilla0515]

Had the upr version of this, leaked and swapped to pvc breathers instead. Great video and explanation thought

[@pines8411]

Just learned a new thing today. Thanks ✌🏼

[@mohammedanfaz3841]

Thanks for breaking it down! Very effective explanation

[@cfmperf]

Thanks Cameron for such a great job and putting in the long hours to explain this complicated subject to those who are interested in learning and understanding more about it! 🔥🍻

[@tssci6774]

Just bought one of these breathers. 10 seconds and piece of tissue will show that nylon ball is dancing around venting and allowing unmetered air into the engine even at idle. Remove the filter and see for yourself. Have the filter on top offers no resistance. This breather disrupts the normal build-up of vacuum in the crankcase by the PCV system, causing more gases, contaminents, and acids to build up. My little $80 OBDII tool showed a loss of of air reported by the MAF and a 8-10% increase in fuel trims, indicating unmetered air entering the system. This unmetered and unfiltered air is not health for your engine. The only way to get it to stop dancing around is to put my hand over it and sealing off so the PCV system can build enough vacuum to overcome the positive pulses. As soon as you disturb the vacuum or reduce it just by touching the throttle it starts venting again. All engines have pulses of positive and negative pressure due to the rotating crank and pistons. Hector at CFM admitted they have not done any testing and could not produce any data. GM has $15 valve regulated oil fill cap designed for this and does not vent at the slightest pressure. This cap will disturb the normal flow in the PCV system. CFM has the technology to put a manometer on the crankcase to fully test it but wont. I did with a $35 professional meter.

[@TheManic.5-OH]

So what's your response to this comment? I ordered one of these the other day and I'm not sure I even want to try it. I've even suggested it to some other people as well. So I'll be a little salty if you guys made me look dumber than I already do on my own

[@RD-ve3wi]

If you doubt the SVT engineers fix, simply use a unidirectional cap w/a latex cover. A trimmed latex glove works great. Late model Mustang works on my 04 Lightning

[@MasterGunZ]

Good informative video and I learned alot. I appreciate the work that went into this video. I have a catch can and I've seen people run this on their coyotes but never understood until now. Now I know what to buy when I supercharge my car

[@justymarq2933]

wow, what a perfectly constructed video man

[@albertorodriguez-wm2oc]

Love the videos keep up the good work I just got my 2017 mustang GT very exciting to start working on it and learning from your videos BTW love the ST build keep up the awesome videos 👍

[@jonathanpineda5477]

I love learning ! Especially on my mustang 😊

[@bartbarnett2811]

Bro most excellent job. You explained everything so well. I watched the whole video and I didn't even need to. I'm a heavy duty diesel mechanic back in the day we used to let our blow by run out the valve cover and onto the ground. Now we have to use oil catch cans and blow-by filters. And with these big diesels when they start getting excessive blow by but they still run fine it creates problems with the turbo and liners and everything else and I was just trying to get a better understanding of how we could fix this problem to get another hundred thousand miles out of the truck. And thanks to you I now have a solution. Do the regulations I still won't be able to vent to atmosphere. But I can come up with a system that's cheap and effective to get that extra 100 or 200,000 miles out of the truck. Thanks.

[@815garage]

What about on a Naturally aspirated 4 cylinder? Specifically the ND Mazda MX5. I’ve seen people put it on them when they turbo them

[@sheluvsmax6221]

This video is amazing man, I have a very high compression 5.7. And have been chasing the cause of a constant oil leak after fixing all gaskets. Hoping this allows some better breatbing😂

[@edgardcolon5763]

Great video. You explained it perfectly and simple 👌 thanks

[@camwhitman5425]

Excellent video and explanation! Thank you.

[@tssci6774]

The more vacuum in the crankcase improves cylinder sealing, reduces blow-by. Race engine actually run a dry sump and vacuum pumps to keep high vacuum in the crankcase. The stock PCV system draws crankcase vapors through the cleanside during boost and open throttle by way of venturi affect of the velocity of the intake charge.. I have tested this breather. It does not function as described because of the low mass of the plastic nylon ball. . 10 seconds and piece of tissue will show that nylon ball is dancing around venting and allowing unmetered air into the engine even at idle. Remove the filter and see for yourself. Have the filter on top offers no resistance. This breather disrupts the normal build-up of vacuum in the crankcase by the PCV system, causing more gases, contaminents, and acids to build up. My little $80 OBDII tool showed a loss of of air reported by the MAF and a 8-10% increase in fuel trims, indicating unmetered air entering the system. This unmetered air is not healthy for your engine. The only way to get it to stop dancing around is to put my hand over it and sealing off so the PCV system can build enough vacuum to overcome the positive pulses. As soon as you disturb the vacuum or reduce it just by touching the throttle it starts venting again. All engines have pulses of positive and negative pressure due to the rotating crank and pistons. Hector at CFM admitted they have not done any testing and could not produce any data. GM has $15 valve regulated oil fill cap designed for this and does not vent at the slightest pressure. This cap will disturb the normal flow in the PCV system. CFM has the technology to put a manometer on the crankcase to fully test it but wont. I did with a $35 professional meter.

[@trunkslorenzana]

So what would you recommend ? Just leave the stock oil cap?

[@tssci6774]

@@trunkslorenzana GM came out with valve regulated oil fill cap 10 years ago, there is a TSB on it, and it has been used on many GM engines to prevent the over pressure condition, especially in winter months. AC Delco FC-219, only $15 and it works well. No reports of it freezing, venting prematurely, and backed up by OEM. Jasper Engines includes one on each rebuilt engine it sells.

[@randy2.0kitt]

Think I’m gonna return this item cuz I feel like my car is slower now less HP could this be true or all in my head.

[@tssci6774]

@@randy2.0kitt put the stock cap back on.

[@sylvesterstallone8637]

I absolutely agree 100% that’s the only reason why that thing would cause the idle to be all messed up because it’s getting stuck open at idle. If you get one then get one from UPR products theirs won’t do that and they have them for all makes and models and you only really need one if you’re racing your car. Any stock vehicle even with an aftermarket blower does not need one of those things. And oil catch can is good enough. If there’s anything that I know it is coyote engines, I have not built a GEN three yet but I have built all kinds of Gen twos and Gen one coyote Engines

[@speedfreaksupra]

Just order mine buddy thank you for the video

[@VikingAF1111]

Great job. Awesome! Get it 100%. Ordered this and I catch 10 for my Challenger Hellcat after watching your video. Great Content appreciate this. Keep up the good work.

[@Krisano1]

Pretty awesome video. Thanks. Very informative

[@ApexxPredator1]

Thanks for the info. Just ordered a CFM breather and catch can for my terminator. Also thanks for the 10% code

[@silenttruth110]

Get an oil catch can for the blow by on the PCv valve

[@Nuxx.O]

Great Explaniation Sir, Thank you.

[@speeddemon_1369]

I got a brand new engine replacement from jasper in my 2014 chevy equinox which is stupid expensive I'm looking into putting on one of those with a oil catch can because the motor has a PCV valve design flaw it causes some serious oil consumption problems

[@osiris.y6997]

Thanks for the lesson now I know what that mini filter is used for and mine is leaking oil I want to get a new one but I’m not sure if their universal or I have to get an specific one

[@paulg444]

It only took 3 minutes in in order to get the short summary .. that was fantastic.

[@FroztiProductions]

But assuming your valve stem seals are in good shape, any pressure coming from the crank-case to the valve cover is probably coming through the oil channels. If this is true, regardless if you're venting it from the top or not, it's affecting the flow of oil up to the head, and draining down from the head. There's supposed to be oil flowing through there, not blow-by vapor. So it would be ideal to find a way to add more venting straight to the crank case so that it doesn't have to pass up to the head. I don't want to drill holes in a good block, that sounds like asking for trouble. Maybe tape the oil pan, then have a tube on the inside that runs above the oil level?

[@eddingtonj9909]

Well explained

[@MrSteveb2429]

Nice job on your video and also you can put a couple drops of oil on the ball before installing.

[@Random.Adventures.]

Hi there I have a 2009 honda civic. It has lots of air coming out of the engine oil cap on idle once I unscrew it. Would it be better for now to just keep the engine oil cap off? I also tried to test the pcv valve and it seems like it was working. What would be the next alternative. The hoses seem fine tho if there was a rip i would think that would be able to feel the air soming out of the hose right? Thanks in advanced

[@sijo24]

Good stuff. So I need catch can and oil breather valve.

[@SB-gt8bi]

I have a 300 srt8 6.1 with a procharger but i have a problem when i start the car and step on the gas oil starts coming out from my header breather valve and so when i get to the stop light smokes starts coming out from the hood any suggestions to get that fixed?

[@zachschmittauer7044]

So i have an LS1, have the driver side valve cover capped. Valley cover running to catch can(no more breather) to intake manifold. Currently have passenger valve cover and throttle body plugged too.. my question is should I still run the (vent hose) from that passenger valve cover to throttle body or plugged okay? Also just installed this oil cap breather and deleted breather from catch can to eliminate unregulated air in.

[@nickl8830]

Fanstatic information thanks for sharing

[@thijsrooijakkers2153]

That is a very informative video. Does the CCV on the Focus make a difference to this videos? My catch can for the pcv side is in the mail, a breather is to be advised I just learned. Will my engine not be covered in oil or other residue when the breather is letting pressure escape ?

[@RD-ve3wi]

Ford SVT addressed this condition by developing a PCV that never fully closes on Gen 2 Lightnings, assume any stock SVT models have same. Eliminates most if not all blow by. Replacing the PCV should be the panacea for excess contamination accumulation. So in theory the unidirectional filler cap wouldn't be necessary. I've got a bi directional filler cap w/a trap that has 0 volume in 3,400 mi.

[@AndyLSB]

awesome ! will help a ecoboost mustang ? (4cyl turbo) i've heard that they sometimes have problems with oil leaks on the turbo or somewhere around there, will this help with that ?

[@lUcario97676]

Andy Salinas yeah everything adds up I just bought one for my fiesta st 👍

[@jorgecortez7352]

What about if the car comes with a turbo (new nissan altima vc 2.0 turbo) and how will affect the the boost will it have a lag/delay ? And can u still a blow off valve 50/50? To get the stu stu turbo sound ?

[@kazmsorany9693]

Nice video that i get my answer about the both side of intakes , but can we say this small filter isn't necessary because it just blow air so what is the problem if isn't on it ?

[@jaemedrano7318]

Hi when do you need to know the filter has to be changed plz let me know thanks

[@Itsjustac6]

What if my c6 corvette ls2 it’s FBO but haves no turbo or super charge would you still recommend it? It have a oil catch can already

[@mikekitsune123]

Hey Cameron. Will I benefit from a valve cover breather is I am not going to boost my 2017 mustang gt. Thank you in advance. Excellent video btw. I am now a subscriber. Cheers

[@shoominati23]

PCV gives better Ring Seal, less wear on internals, less on no leaks thru seals on gaskets on engine blocks and obviously better emissions. But not alot of people know that you really need to have a breather drawing air into the engine while the opposite side valve cover relieves it into the intake manifold. Look at your common or garden '68 chevy smallblock - you will have the PCV hooked to the pipe in the base of the carby, and then on the passenger side you will have the breather connection which should go to a little plastic scoop inside the air cleaner with a foam membrane. It's a much more complicated but necessary system than one thinks.

[@yellowbomb1075]

I put a filter on my pcv port on my 1uz and it didn't run good I could feel the vacuum from the intake I turned the car off after a minute do u think it's fine you think I hurt my engine?

[@jonathanpineda5477]

Talking about PCv. I looked under my hood and I got a smalllesk on my pcv. I can see oil around it. What can I do ?

[@sambo92]

What about if you have a breather on your catch can and capped off the manifold?

[@jeremyswann2228]

Air intake one driverside, passenger side is caped by oil cap/filler. Is a catch 🛢 better in the place of the capped spot by oil fill? 2013 mustang gt procharger. Just ordered oil cap breather

[@carlodonnell146]

My dodge ram v8 has a breather on the passenger side of the engine between the air-box and the valve cover; is that doing the same thing that the oil-cap breather would do, and would it be a benefit to have both?

[@Vickland5]

I understand that two are not required, but any problem with two being installed? I currently have two K&Ns one on each valve cover, but not as cool seeming as these with a valve...at least from what I can tell is they are filters that might allow air both directions(???)

[@kerryjohns7784]

Man I've been trying to find one of those for my mazdaspeed 3 and nowhere will send one to New Zealand for me and here you are getting them for heaps of cars and I'm like where how haha

[@Lg1969]

Hey Cam do you know if it fits perfectly on a 2016 Mustang Ecoboost which has cover and oil cap is kinda in so wondering is it extended long enough to close a seal??? Also you don't need like a clamps to hold th breather cap,, I see the UPR one needs a clamps ??? Great video so informative Thank You ....

[@captainkai9989]

great video; does it work for porsche cayenne? my car is releasing constant fume on idle from pcv out

[@rog2296]

Thank you

[@d3klin]

So the Valve Cover Breather is better instead PCV delete method or use Oil Catch Can? Why? Isn't it better for pressure equalization and not to get oil into intake manifold use the PCV delete?

[@rudajeca5674]

Good video and good explanation, finale a KZbinr from the same city, 🔧🧰🤙🏻

[@Three.5]

Very informative

[@anthony_sasquatch8056]

Can you put one on a turbo diesel?? Like a Jetta tdi?

[@ryanharris6788]

I think I’m getting a lot of blow by in my ST, I wanted to look into these

[@cfmperf]

We have lots of customers running them on STs.

[@HectorRodriguez-fe8xz]

I have a cherokee srt 6.4 not turbo no supercharger, only have cold air intake and repro you think i may need one?

[@MustangGuru]

On a supercharged engine like the Coyote placing said breather you would have plug off the vacuum going to the supercharger inlet from the PCV. As well the clean side hose to the non metered hose on the intake tube and place a breather (non check valve) on the clean side, the pressure from the blow by at higher RPM will force dirty air back into the intake system thru the throttle body. I would for supercharged system block of original PCV system run a vented catch can on bank 1. And a vented filter on clean side. Only clean air gets into the intake system. The original clean side will block off as well. All crank case pressure will be routed to the vented catch can. And no check ball.

[@Oatis_07]

I’m Not sure if I should run a Oil Catch Can or a Breather Kit..Help! ? I have a 21 Mustang GT

[@michaelbaskinmichael9862]

Where can I gee one exactly what I need thanks

[@SurgeonPain]

Can I still run this breather if I have a BOV??? Im running my BOV from the sound symposer delete plate on my intake manifold.

[@kevintlaseca3980]

Me too I have this problem too

[@reignstir]

i know its been a year but can i put a catch can even if i dont have a turbo setup?

[@sumdooky]

I have oil leaking from blow by. Would this relieve some blowby in this situation or should something else be done?

[@hajileserpud9539]

Add a catch can ASAP !!! That will help immediately then look into getting a vented breather

[@jasonnellis3566]

Love this breather. What do I use to clean it. It's dirty

[@josebonilla5607]

More easy if you have turbo just conect de pcv valve in the intake but 1 inch after pcv breather

[@ndasigerry]

Have a question, is the fresh air inlet into the crankcase a one way valve(in) or is a open pathway? (air can go in or out)

[@adrianaguilar9627]

I have one on my mustang and is leaks oil by the filter do u know why

[@diogopaterniani4073]

Is there any issues on doing that on a stock engine?

[@emerica1199]

Will a catch can with one of those breather filters on top of it work as well?

[@ahmedwwh2854]

Thank you sooo much man you are the geat🌹

[@CoyoteDAworld]

Does this work for the ecoboost mustang?

[@little_xsaud6636]

I have a v6 charger 2010 but I’m not sure we’re to put it

[@_sj5.0_13]

Hey bro I don’t see one for 2020 gen3 10speed mustangs on the website?

[@KINGKJ2REAL]

I run two filters. On my gen 2 coyote is this fine ? I have one on each PCV valve. Been on the car for awhile now and it runs fine

[@jocamick]

Wondering the same. Seems like it should be fine on both valve covers.

[@nate5.096]

How’s it been?

[@jeremyswann2228]

Anyone order this part and the top filter just spin keeping it from turning all the way down??

[@samuellett4994]

pcv system not good on erquinox added breathert to avoid rear main seal blow out

[@speeddemon_1369]

I'm here for the same reason I got a 2014 equinox with a brand new engine replacement from jasper which is stupid expensive...I'm looking to put one of these on along with a oil catch can

[@JV-eb6hy]

I put a breather on scatpack by the MAF

[@geriatricginger]

Extremely laymans explanatory, which I appreciate! Now help me explain why my catch can fills up every 100mi (300ml) on a VW 2.0 TSI with 14% leak-down and 205 compression test.. lol Or why my new OEM stock PCV will syphon 1/2 qt of oil in 70 miles, and shove it down the engine's throat.. I cannot figure it out for anything..

[@TankToChest]

Ok when you boost your car all your vaccume stuff goes infront of the turbo.

[@veganqwef1162]

Do they have one for 2015 chevrolet silverado 5.3

[@nehemiaslabrador2288]

Would a catch can be needed after this?

[@CarlosGonzalez-vc2ky]

Ight imma cop 👌🏽

[@CarlosGonzalez-vc2ky]

Nvm wont ship to cali 💀✌🏼

[@sasser92]

do they have one for a gen 1 speed3? or is it the same as the gen 2?

[@cfmperf]

You would need to upgrade to a Gen 2 valve cover.

[@chispagiddings]

Does it let oil smell to the engine bay?

[@udonwadon2045]

Will you install oil catch can on your car?

[@jdmlife4ever118]

So im okay putting this on stock motor?

[@noelstrailridingxperience5279]

How do you clean it??? Please respond…

[@Djfreestyle67]

Thoughts on a Audi A4 2.0 b7 ?

[@jgreenjeans]

Subscribed. I learned a lot. . . I think🤔. . . I'm wrapping my head around it. Thanks for admitting that it took you a while to understand it. I think people THINK they know something, but when they try to explain it to someone else, they realize they don't really know (unless they're self aggrandizing) I just did an intake mod that deleted the breather tube just after the MAF and I replaced it with a little filter on the valve cover and couldn't understand why I'm lean only at idle. Now I get it. I'm pulling in un-metered air through that little filter. 😃 Knowing my problem is half the battle

[@austin.haynes]

Any idea why my valve cover would explode into pieces?

[@tillitkillsmeoutdoors1851]

Will they ship this to California?

[@MrSnookerballs]

illegal to vent any engine fumes or crankcase air to the atmosphere, that is why an oil seperator is better than a catch can as a seperator takes the oil and contaminates out of the crankcase waste and puts cleaner fumes back throught the intake to burn again.

[@user-nc5yr9ti6o]

How do I get that valve cover breather

[@carsandmore365]

Are you still running this or did you find it not to work right

[@AlphaFlight]

I've.been using a breather on my 2.0 theta motor. Haven't felt a difference. But I'm sure it's going its job

[@shadowsshadows2630]

Do you have them for the eco boost 2019

[@cfmperf]

Please send model info to [e-mail]

[@cheetoshotfries2289]

Can i put this on my honda v6🥸?

[@weebl101]

We need a Happy Engine shirt design.