Blowby What is normal and what is not?

[@MrDIYer]

If you like this video and want to learn more heres a playlist of similar content kzbin.info/aero/PLiy36c_fHap_4LW2ANeFn8fLqF9cqqJJO&si=10LxR5DyYbUtO9rh

[@citizenplane5840]

Man this is the best way to explain it. And English isn't even your first language. Well done my friend. You're an amazing teacher.

[@johnny2024]

If you know more than one language you're automatically smarter

[@hondagang7985]

4 years later and this video is still helping the car community, thanks dude top man 💯

[@MrDIYer]

Glad to help

[@MowSow]

I’ve been working on my cars for 3 decades .. this is the first time I understood a concept I thought I knew very well. I was wrong, it took a genius like you to explain it. This video is very underrated!!

[@MrDIYer]

Thank you. Glad you liked it.

[@spicygringo5044]

This is one of the best explanations I have ever seen. Thank you

[@MrDIYer]

thank you...

[@ilikethekeyofE]

I second this.

[@panchocapistrano6956]

@@MrDIYer wouldn't a compression test be the ultimate decider whether you have excessive blowby?

[@mirandabri834]

I like your presentation sir. God bless you. And please be saved by the Lord Jesus Christ before its too late! John 3:16 For God so loved the world, that He gave His only begotten Son, that whosoever believes in him shall not perish but have everlasting life. End. Glory to God amen 🙏

[@JA-rc4uy]

@@panchocapistrano6956 Sorry to revive a 1 year old post. But no, a compression tester will only tell you how much compression a cylinder is capable of producing. And sure, you can find a cylinder with low compression with a compression tester, but that will not tell you how much compression is being lost. The way to know how much is being lost is to use a cylinder leak down tester. Some compression lose is normal on all engines, but excessive can be an issue. That is why you use a leak down tester, to see if the cylinder is within specs.

[@triblues7065]

almosts eleven minutes ang video mo. In less than two (2) minutes, nagustuhan ko ang video mo. Brief, concise, on point. Magaling ka mag turo and mag explain. Maraming salamat sa inyo. We need the likes of you dito sa Pinas and on youtube. Mas madaming matutunan ang mga viewers sa pamara-an mo sa pag turo, explain, and present. Maraming Salamat, Sir! Isa na po akong bagong subscriber mo!

[@MrDIYer]

thank you po..

[@notretireingearlyat5581]

This video actually made a bulb come into my head "I get it"..it was so easy to follow and so carefully explained with the other examples given!! Thanks so much for the education.

[@RonaldEJones-cd3fr]

Finally, a clear explanation complete with checkpoints from someone who knows what he is talking about. Thank you.

[@deathheadmothman11]

I knew what blow by was from prior encounters but you explained it with detail and actual knowledge to back it up with pictures/videos. EVERYONE who is buying a used diesel or has one they are keeping forever should watch this. Great trick with the white paper!

[@saintpeterson5275]

This is the best video about blowby I have had seen so far, it is very easy to understand the explanation. The others never mentioned that there are two(2) types of engine blowby. I'm very glad that I found your channel.

[@Tke98]

I didn't read the comments before watching this but now i see I'm not the only one saying this. This was probably the best explanation of anything car related I've ever seen. Thanks for the video!

[@ryanalmeida2916]

These videos are gold, not the best quality but more knowledge then any video I’ve ever watched on blow-by

[@goose2090]

Great info. I drive junkers back & forth to work because I don't like risking deer assaults & metal particulates on my clean rides. Keeping junkers in shape is a chore, but I enjoy the knowledge & it gives me something to do.

[@LifeLongArtist]

My engine has bad compression and my diagnosis was that I probably had some leaky valves, but wasn’t totally sure. This video along with other troubleshooting steps I’ve taken helped me confirm that I’m likely correct.

[@mr.e.r.2913]

The video guides us the indicators of engine and types of blowby. Very straigt forward.

[@TitoBoi86]

Thank you so much I’m actually driving 8hrs to look at a freightliner and this video made me so much more comfortable to buy or not to buy !!!!! 👍💯

[@mechanknuckle]

Excellent explanation. Most people don't understand this.

[@fortunestanley]

3 years ago, but still very, very helpful. Thanks for the well elaborate information.

[@zfloz9895]

For an old generation engine,like the one you have in this video,if it is in good condition like yours. You won't see gasses coming out of breather, or oil cap. But from newer gen engine,from 2010 onwards, especially in Volkswagen/Audi group, you will see a lot of blowby even from a new car. Because they are using low tensions rings,on the piston.

[@swamp-yankee]

This true of duramax engines? I looked at a truck for my business and could see a small amount of gasses in the right light coming out of the oil fill cap. Some oil film in the engine bay It’s an 05

[@VikramSingh-ww2js]

Mine skoda emits white smoke from oil dipstick,when idle start,upon acceleration,no smoke ,only little oil comes out of dipstick, pls suggest Sir ,is it ok or not

[@Tk-di5vd]

I gotta butt in cause this video sent me down a rabbit hole for no reason. I was a trained marine tech. Most marine applications are hi performance engines as they constantly revving over 4000 rpm’s for extended periods of time. I was caught off guard by my 2010 Honda fit having tons of positive pressure coming from the oil cap. In a marine application this would be a red flag. But on newer economy vehicles, IT IS NOT AN ISSUE. One way engineers obtain higher mpg is by using low tension piston rings. Any 4 cyl car made in the last 15 years have serious wear and tear according to this video. But they do not. They are designed to allow that much pressure in the valve cover. This video is incorrect and dammit, made me waste 2 hours checking my pcv and compression to realize it. Larger engines with high tension piston rings should not have this trait, but a 4 cyl that claims to get 30+ mpg will absolutely have this trait. Hopefully you guys see this comment, cheers!

[@albertvela8712]

I'm glad I saw this video. Saved me from buying a headache. Thank You You explained it very well.

[@poisonforlunch]

galing ser. finallly, someone who knows what he is talking about explaining the subject thoroughly. well made video. thanks

[@atomicdmt8763]

excellent info! Ive been chasing down issues on my van for YEARS.........and finally have come to a loose/not sealing oil cap (and oil filler tube grommet at the engine is cracked, leaking air) creating a LEAN condition.....leading to more fuel injected.... and fouling the spark plugs and O2 sensors!

[@olamabambi4193]

Thank you for taking the time to educate many people about the operation of diesel engines. It is very important for your viewers to remember to do all necessary scheduled maintenance in order to prevent any premature failure or wear of their diesel engine. 👏

[@nattydreadlocks1973]

This guy really knows his stuff.👍👍👍

[@skotsephrenia1]

Filipino engineer... Mabuhay..galing mo idol

[@sergethecarhauler795]

Great explanation, just swapped an engine on a 2000 Corolla and it eats oil like a Eastern European mayonnaise. Oil cap floats when you take it off while engine is running. Thinking about rebuilding it because these are so old and have so many miles on them

[@eulyverjameseugenio104]

this guy is genius.. I hope to see videos with him in motorcycle DIYS👌👍

[@kidduosfro]

The best PRACTICAL explanation 👍

[@CameraRestore]

One of the best video out there explaining this behaviour with our cars! Thank you for sharing!

[@MichaelCzajka]

Good explanation. My brother's Land Rover (Range Rover) diesel blows a mist out of the oil filler hole. It looks like blowby but it is normal in these engines: It's not coming out forcefully but it does make a chuffing noise for a short time when it starts N.B. It just passed a roadworthy and independent inspection. A piece of paper placed over the oil filler hole didn't move i.e. It's not real blow by. In the meantime, we freed up the compression and oil rings with a single application lubricant that bonds to the metal. The engine immediately got quieter (purrs like a kitten now) and the fuel economy improved. 🙂

[@ivanvarela3215]

What product did you use?

[@MichaelCzajka]

@@ivanvarela3215 XcelPlus: The engine is so quiet now you can no longer hear it pull up. It sounds like a 4-stroke rather than a diesel. We put through both the Engine and "Combustion Chamber" treatments. We also treated it with "Sludge Out" and "Ring Free" because it was a high mileage engine. We added these things one at a time over a few oil changes. Each time the engine got noticeably quieter. 🙂

[@MichaelCzajka]

@@ivanvarela3215 Xcelplus

[@swatipatil555]

All my doubts on blow-by has been cleared in a single video.

[@zurgboy07]

Wish I had a teacher like you

[@robsanchez6618]

That was one of the best videos on this subject THANK YOU

[@MrDIYer]

Wow, thank you!

[@kumarpooran1831]

Great video @Mr. DIYer, your explanation and demonstrations were way better than some instructors.

[@zGoodMan187z]

Had my oil pan off and had to turn the crank and noticed what looks like carbon buildup on the underside of the pistons. As I turned the crank you could feel pressure buildup and start to leak out. The pressure was strong in each stroke. This is what led me to this page.

[@mannyjuta8810]

This is a very good information. I have a 1988 Mazda B2200 CabPlus SE5 and recently rebuilt the engine. What I noticed is that there are some oil spill coming out of the crankcase air breather after taking to local mechanic for an oil leak from the transmission. Sad to say that my mechanic who rebuilt the engine was not available during. Upon his return, he illustrated the same way as you did and no sign of oil from the air breather, oil cap and oil dip stick. Just last night 12/10/2023, I noticed that the oil spill from the crankcase air breather is back. Sad to say again that my mechanic moved to different state and I have no one to trust. So given with your information, it appears that my truck has an accessive blowby issues. Would PCV valve would take part of it? Any help or suggestion is very well appreciated.

[@bronson1807]

went to look at a diesel SUV yesterday, took the oil cap off and it just about blew my hat off. so glad i checked to see if that was normal or not.

[@truthsayer8918]

Mine's been like every since it was brand new but it gets great gas mileage and the compression test is fine!

[@InstructorAnthony]

Not a mechanic, instead I do DOT truck inspections. This topic came up and I had no idea what they were talking about. I now know more than I ever expected to know about blowby. Thank you.

[@tura2ra]

Thank you for the explanation sir, i was wondering why i hear sound when i take put the oil cap.

[@BLAZEPSI]

Salamat Sir! Madaling maintindihan... More power.

[@tatangBoi]

Best and honest explanation!!!

[@marconunez174]

Galing mo sir. Very knowlegeable and super informative. Keep it up

[@lalandejulien6945]

Thanks for your very good content chanel. I have just one question. Why some engine like 4d56 did common rail dont have pcv valve its have just hose like in this video ? Thanks a lot

[@Essenheimer]

Thank you for taking all that time to make a video and explain things so well!

[@mightyluv]

Yeah, dang man. Great explanation, but I think it just confirmed my suspicions that my engine is worn out. Thanks for posting, time to decide: keep and repair, or sell as is?

[@xxwalhalaxxmozza7415]

Excellent video thanks. My transit mk7 is chuffing smoke from the filler, apparently this is fairly normal for them, I’ll try the paper test now and include the vent and oil check pipes

[@aedwards4496]

Great video, well explained. Not sure about the garden hose used as the rocker cover breather pipe though

[@xgearheart8592]

Real mechanic. Roosters in the background. 💪 Trust this man. 👍

[@dogtailsmatter]

Thank u for taking the time to educate on this problem. Saved me alot of time money

[@dannoi]

Superb video ! very technical, yet explained in a easygoing way ! thank you for this !

[@JeffreyKB]

You explain this perfectly. Very well done.

[@KevinTaddeo]

Best description ever. Very well done sir. Thank you.

[@BaptistJoshua]

I subscribed because of this video. You are very thorough and made an excellent video, which moved in good order, teaching us step by step. Thank you!

[@hamishlovesit4731]

Great video , thanks for your explanation and experience 😊

[@MrDIYer]

My pleasure!

[@richardlittlepage9069]

Great informational video. 6.6 duramax light smoke from crankcase n every so often it is excessive I think what you said by your engine is on it's way out 🙉 I hope not but well see. Thanks RL

[@omribuch]

Very informative thank you! if i detect excessive blowby in my car, will thicker oil or oil additives help? thanks

[@RitchieLoko]

Best Explaination ever💯🙏

[@madihismail802]

Thanks for the video!! I have porsche cayman 987, I have a white smoke coming from a hose under the engine, it smells like oil burnt. The engine performance is normal but I know the white smoke is not normal as people try to warn me at every stop, I really don't what's happening

[@branon6565]

I thought blow by was caused by the piston rings going bad, thus causing a decrease in compression in any effected cylinders...for example, I've got an 85 AMC Cj7 with the 4.2L 258cu 6cylinder, and the #s 1 & 3 cylinders both are down in compression by almost 12lbs, if I'm rememberin correctly....it's having a new head and all that installed now as I blew the head gasket after having it replaced just 10 months ago, low mileage motor, original head gasket lasted 35 yrs....🤷🏻‍♂️🤘🏻🇺🇸

[@Nanogrip]

Best explanation on blowby gas! Thank you friend for this video and makes sense to test with a compression test tool. I have one at home but I don't know why I did not think about using it. I'll check out my tiny Toyota Passo this weekend as I see some smoke (or water vapor?) coming from the oil fill cap and it burns a quart of oil every 3000km, many blessings from the tiny islands of Palau!

[@MarkJacksonGaming]

-- Well explained. I was a little surprised C4 was the only good one before rebuild. Ran a lot of Jeeps with the I-6, 4.0L and that cylinder the closest to the firewall was always the hottest. Hey thumbs up. And had a chuckle with the garden hose. Hell, if it works :)

[@MrDIYer]

Lol thank you

[@tinamcgarrah7794]

Excellent video explaining this situation!!! Had a bad blow by problem in a Saturn. Clean piston tops and rings with good soaks, and Amsoil and Royal Purple fuel System cleaners. Put on a new PCV, had valve seal blow by test too. I even put on a catch can to see the amount it was blowing by....Not opposed to fixes in a can, if they WORK ! I went ahead and tried that RESTORE additive, after all else had failed. Well the little bit it builds up on the Rings was enough to slow the blow by way way down ! I'm sure results will vary for different engines and previous care and mileage situations! There isn't much else I could do, before engine teardown. Just not worth it, on this car to me.. But it still runs well,, a little better now too.. So just a thought for anyone who has a car not worth the price of re-ringing etc.. Do everything like the fuel cleaner additives first, Clean well working PCV.. The 10 bucks was well worth it for me, at least...Great explanation on how blowby is caused and what to look for!!!👍 Thanx; Jethro

[@stephonthomas3336]

what restore additive did you use

[@danielkohler3458]

Great explanation. I'm guessing English is your second language which makes this even more impressive. Good day Sir and wishing you much success.

[@dmon13]

Great explanation. Thank you!I’m currently having a few drops of milky oil coming out of my brand new KTM 250 dirtbike crankcase hose and trying to figure out the culprit. I accidentally drowned it on the river and ride it out of the trails. Drain the milky oil water mix. Flushed it out with diesel a couple of times and 2 more times with oil. Finally put new oil and now I noticed the problem. Idk if I should take the bike for a ride and see if it burns out any left over water. Or I possibly blew a coolant gasket. It’s worth mentioning the bike only has 7 hours. So I wonder if it hasn’t broken in fully yet allowing for some of this to happen. Wish me luck. Thanks again for a thorough explanation. Sounds like I will need to do a leak down and compression test before I take it out for a ride just to prevent further damage.

[@GetTheFO]

Definitely compression test. You didn’t run the engine with a diesel/oil mix right?

[@edgarjabines2108]

Absolutely I learned a lot from this. Thank you so much more power to you

[@terryrich4285]

Great video but how is there blowback hose in the cam when in the diagram it is in the crankshaft?

[@dirksmit6144]

Good video. Is a blow by of 50 to 60 under load to high for a D4D engine Can a blocked dpf cause a rise in blow by

[@patricksilvestri2276]

Best explanation of this article and very helpful.

[@adrianespe4496]

sir my k6a engine,consuming a lot of oil 1 liter for 300km ,no leaking outside,I did my compression test 195,205,205,no pressure coming out of oil cup,dip stick or breather,engine is running good

[@garypitt7020]

Thanks, it's well explained, I just happened to have the same engine, but mind have excessive blow by.

[@bochnarbunch871]

Thank you for this wonderful video. I don't know much but you've explained it perfectly. I'm afraid it taught me my engine might be on it's way out. Tough to swallow after I just had the head gasket replaced last year and the trans rebuilt a few months ago.

[@MrDIYer]

Be sure to perfom compression test first

[@bochnarbunch871]

@@MrDIYer thank you for your response. I appreciate it.

[@baddrummerscorner5694]

Your the best...sir aside from excessive clearances and engine wornouts that you mentioned, is there any other causes of blowby.

[@MrDIYer]

Lack of oil lubrication

[@givenchilinda1509]

Your channel is helpful Boss, I'm working on the same engine and on the breather hose from the tappet cover to the intake manifold they is more smoke released, what could be the cause

[@acewarren14]

Hi Sir. Thank you for your very informative video. I hope i can show to my video which i really confuse whether my engine is blowby or not! Again Sir thank you for this video.

[@Mikeandlucy1]

Very interesting, informative and easily understood, thanks

[@larrybarnes3920]

I agree with Spicy Gringo. Great vid.👍👍

[@theboys247]

Hey so great video but question, what if there's no oil sprinkling out but just smoke?

[@AA-hy1xu]

Great video buddy! Have a 2014 Camry 6cyl with only 71k on it. Car runs perfectly but smokes after a long drive on freeway. Installed a catch can which help a lil but once that can is full oil goes into the exhaust and burns through the pipe again. Any suggestions?

[@XChaoticComposerX]

CLEARLY explained... Thank You Sir...

[@goodmusickforthesoul]

The best video about blow by that I’ve ever seen. Liked and subscribed. Thank you!

[@eaglehigh-h3e]

Really really really good video and explanation. Like so much.

[@garvindavis751]

All your videos are great but this one made me understand why my 201 is weak and why oil forces from the cap. I guess I have to look for an engine. Thanks. 👍👍

[@MrDIYer]

Conduct a compression and leak test first

[@parales03]

Thank you!!!! This video did help me out a lot!! I’ll be performing the test today.

[@peterchua9952]

Thank you for the amazing explanation !

[@hosseinhayati9820]

Thank you for good explanation of problem. I have a 4 sylinder diesel engine, old tractor. This angine had 2 problemd. Water in oil and oil out of exhaus. I did change all liners and pistons, fitted the valves and install new gakets all over. Now after 10 hours running, the engine oil still have same colour as it was new! BUT oil comes out of exhaus! Same as before. Head gasket is new and the head has been torqued according to instruction. One more thing. By accident, after overhaul, I install the oil filter wrong, and after about 1.2 hours it started to leack oil with high presure from the oil filter housing. Then I installed the oil filter correct, this time.changed oil and ran the engin about 6-8 hours. But I notised the oil drom on exhaust and now it is too much oil everywhere on the tractor. What do you think about this problem?

[@andrei3288]

Thanks for the great explanation. I assume the blow by should increase with the engine speed right? My TDI engine releases light white smoke in idle both in the oil and the dipstick pipe but only at idle. The pressure is not very high, but smoke is present and no oil is coming out. However, the smoke disappears, if the engine speed is increased to 2000 rpm. Furthermore, it does not feel that the pressure is increasing with the rpm. Do you have any idea what could be the issue?

[@rick137.pickle]

This is a properly maintained engine.

[@ivanerwinbuan4851]

@mr. Diyer. You are awesome. Best explanation in KZbin

[@joseortiz-hd3qp]

D best.!!.. i did check on those points you mentioned and i have an overhaul planned already. Correct analysis . very accurate diagnosis

[@dondi7]

The best explanation I've seen! Thank you.

[@jnvc9121]

is the breather hose required to be connected to the air intake hose? can it be vented outside the engine since its positive pressure and does not require vacuum.

[@Lsxfcx]

I have a turbocharged ls1 and I vent both valve covers into a catch can, no contaminated oil vapor should go back into the intake in a performance application.

[@dent-clublondon]

Best explanation on basis of engine theory with excellent demo 👌

[@kingyuaking]

Have got a question plz, what prevents oil from being pushed out through the breather hose ?

[@mornebezuidenhout1805]

Thank you for an informative video. How does the pcv system come into play here? Is excessive blowby affected and major oil leaks, by a faulty pcv? Does the pcv not manage that blowby to avoid the pressure

[@MrDIYer]

kzbin.info/www/bejne/hGa3dKujf7V5q7c maybe this video will answer your questions

[@onesalty1]

Very excellent video, well put together! . Thank you.

[@bhaskarudupeddakotla6126]

Excellent explanation about blowby. Very much useful to field technicians even who do not have blowby tool

[@DericCribbs]

Perfect, I watched the entire video. That's pretty amazing👍🏁

[@bernbrul9145]

Sir galing mo po magexplain.. Mabuhay ka po..