What is Engine Blow By???

[@nugenki]

@12:15 are you kidding me, that wasn't boring at all. I was learning so much and comparing my results to yours with your wealth of knowledge. Definitely subscribing

[@chessiesystemrailfanman3741]

Dude that first part of your video when you were testing the engine compression was very interesting especially to a disabled auto mechanic like me. I wanted to see what you were going to do next with this motor then boom we were swimming with the fishes? I would have loved to see you remedy this compression loss with this engine. Thank you for the video.

[@maintmech1245]

Dude you are f-ing hilarious, and extremely knowledgeable! I love your vids! Thanks for spending the time to make them

[@bugtkz9153]

My Toyota Tacoma has 291,000 miles, and has no blow by. Also i done the plugs back in January, and they all looked really good, no oil on them at all. I have the 5vz-fe engine in my truck.

[@jayy.cls6]

Bulletproof motor !

[@bugtkz9153]

@@jayy.cls6 3 years later, now I'm at 303,000, still without issues.

[@rickylee2477]

@@bugtkz9153well look at you. You deserve a hero cookie.

[@NicoSmets]

Very informative. I especially like the "too much information"

[@ailll1]

In my truck, I installed an oil catch can to prevent oil particles caused by blow by to go through the intake system and gum up everything. Its crazy the amount of oil that that thing collects!

[@canadapainter658]

brian = I thought the same... since humidity can go into the engine while sitting...due to hanging open hose can cause maybe corrosion inside.I drove the car like that with hanging crankcase hose for the whole summer since I did not realized it was off.Today I connected it back the way it suppose to be.

[@hankhill3417]

The cylinders that fire together are known as “sister cylinders”

[@22rerunner]

I can't believe today is the first time I've come across your channel. Definitely subscribing!

[@shartne]

blow by can actually push oil out all the seals like the valve cover front and rear seals.

[@PhilBourgeois]

The test you did is great in telling the condition of a Diesel engine.

[@Nolimit2far]

Very educational video. Thank you for being direct and to the point!

[@edstababy]

My tissue flew into the engine, lol just kidding.

[@markferraro5250]

hey Brian firing order 1342 i would start using transducers for compression checks and delta FLS type sensors for piston ring blow by by installing on dipstick waste spark firing on exhaust stroke is not for emissions it closes the loop of the ignition circuit i know i sound like a back seat driver you are a GREAT tech all the best to you bro

[@rickylee2477]

Cap

[@jason-ge5nr]

700 miles to burn off all the oil? He arrive on a blue cloud?

[@drewx420]

I love these 5E-FE engines. Mine used a decent amount of oil though it had 300,000 kms and 100,000 of them had rev limiter at every shift. I never trust my honda D series motor as much..

[@briansmobile1]

I feel ya.

[@heyitschinoable]

drewx420 my Honda D series engine was bullet proof! 260k miles and was still choochin till it got stolen :(

[@6.0charleston843]

my d series won't die

[@dee1380]

Question? How do I get rid of blow by? I thought I had a cracked head because oil is getting into my coolant, but my neighbor read my compression sheet, & said I have too strong of compression for it to be a cracked head or head gasket. He is a master mechanic, so I believe him. I was willing to pay him to fix the head or head gasket, & he doesn't turn down money, but he is pretty honest with me, for the most part. He came to the conclusion that it's blow by. Drives me crazy, cuz it smokes, & my new radiator changes from fresh looking coolant to brown oily looking coolant, after driving. Any suggestion on getting rid of blow by? I have a 1990 Ford F-150. Thanks in advance.

[@rickylee2477]

That guys a fool. Head gasket is only way that could happen or. Cracked engine block or head.

[@christopherwilkinson3128]

Thanks! That's how you diagnose, but how do you fix it?

[@heyderaliyev8976]

you are great maan.. amazing explanation on how to find out a blowby and which c- chamber it is ... just amazing

[@vic8695]

did you check the PCV system before the compression test? I have some blow-by on my diesel Astra and mine pours oil through a lor of seals (dosen't burn oil or any funny noise, just did 300km with it on freeway without need to top up with oil). Heard of you don't replace the pcv filter every 100 000km, it clogs up and causes clow-by to build up (mine builds up only in the rocker cover, nothing comes through the dipstick) and force oil throught the seals.

[@eaa50141]

Pardon me but did i hear you said that the firing order of this four-cylinder engine is 1-4-3-2, instead of 1-3-4-2?

[@Avatheskibidiaplphadog]

Brian I bought a used engine,I flipped it over to gain access to the crank. Had it like that for a few weeks with the old oil filter hooked up. When I went to start it,she had a massive amount of blow by. It's slowly going away, and it looks like steam , there's NO oil indication in my air cleaner. I pulled plugs and a few of them were oil soaked ,after changing them the oil disappeared.What the hell, is it blow by or not .

[@danielzabel7133]

Now how do i fix it and not get ripped off and price. And not boring you helped me with what is wrong with my car.

[@High_Tech_Mountain]

Great video, and awesome diving footage at the end. Thank you for sharing with us.

[@StoicFighter]

So if I have an oil leak coming from my air intake is that a symptom of blow by?

[@VitalityMassage]

Can blow by escape the engine when the cap is fully screwed down?

[@heyitschinoable]

Vitality Massage if the PCV system is restricted or blocked it can force itself out through gaskets or oil pan seals.

[@danwells7691]

also a bad valve guide will do it thru the carb or exhaust

[@davidmark4182]

Sorry to be so offtopic but does someone know a method to get back into an Instagram account?? I was stupid lost the password. I would love any help you can give me

[@sylasaaron8775]

@David Mark instablaster :)

[@davidmark4182]

@Sylas Aaron i really appreciate your reply. I found the site through google and I'm in the hacking process now. Looks like it's gonna take quite some time so I will get back to you later with my results.

[@tricky778]

My Astra H has sprayed oil all over from the top of the dipstick tube (pushing the dipstick up), now I'm getting brown oil in the top of the coolant tank and my coolant's low even after just being refilled. Is this blow-by? Or is it even worse? Of course it's worse, but is the clean-oil-in-coolant due to over-pressure in the crank-case busting the oil-pump gasket? Or is my engine dumping coolant into the oil, blowing oil out as it boils?

[@Koinonia_R]

Brian, I'm willing to bet his air consumption sucked that dive. Those arm movements! I need to get back into SCUBA.

[@briansmobile1]

LOL! You're not kidding- we had a lot fun though and the second tank he was back in the groove again. I was watching a buddy's training video on a sub and you could tell his "group" was pretty amped up. They kept trying to walk on the deck of the submersed submarine in their fins.

[@DFWAuto_Hack]

nice video here. where can I find your fancy relay? really convenient. I need to run a compression test on 2 vehicles but can not seem to find a helper to crank the vehicle. At first, I did it all by myself but then realised that the progression of the reading is also important for diagnostic purpose

[@blaireuan]

where did u get that relay with the switch

[@seanbroker2240]

is it healthy to have a small amount of air coming out of the oil cap?

[@FGuilt]

love your videos dude! scuba is a lot of fun. hope it was a great trip. cheers. keep up those vids man. Us diyers sure appreciate them.

[@durial702]

Great vid Brian. I really enjoyed the dive footage. Post some more of your adventures on your other channel.

[@briansmobile1]

on theskiviking? Will do! I've neglected that a bit.

[@contagiousFX]

Hi Brian, What is your opinion on digital compression tester? Worth buying? Thank you.

[@38911bytefree]

never heard of that before. Great vid. Brian, from another vid I saw here, when cilinder had bad comp I think that the outer ones are prone to have poor reading compared to the center ones. Is that right. If so, what is the reason ?. On my prev car always got oily spark plug in number one ... it was so gunk that the cilinder wont fire at all. Cheers

[@steveb7714]

Hey Brian, thanks for this video and the explanations all along the way. I have an '07 Mazda 3 with about 150 000 Km on it and basically the same problem, black on the end of the exhaust all the time, oil consumption way too high ( 1/2 litre per 130 Km) . What would you recommend for a rebuild on this engine?

[@عبدالرزاقدربالفقراءالدارالبيضا]

Crazy .how can we hear your explanation about blow by when the engine is running and you explain at the same time

[@mistyman411]

will blow by cause oil in the breather? has carb

[@Angel_Sr.subarumaster213]

Awesome Video! Ase A1 Test prep stuff man! 👍🏾

[@briansmobile1]

Thanks!

[@Y10Q]

180k miles. Miracle it even got that far out of a Tercel.

[@Gordon302]

Ovniusa15, At first, I too was a little confused with the term, "blow by". And adding, "suck, squeeze, bang, blow" to this, didn't help either. But, Brian, on a more serious note, why don't all of the cylinders have ignition coils? They appear to be COPs (coil over plugs).

[@michaelhooboob]

They rely on 'waste' spark from the parent coil. More efficient.

[@justayoutubeuser5437]

i love long videos from you brian

[@stuartsmith5146]

Got a 97 OBW. Steady stream of air coming out of the capless oil filler tube. A friend says the timing may be off. I believe that's true. Regardless, Justin Stob at AWD in Oregon blogged about an overheated block can crack a cylinder lining. Any way to test for a cracked lining vs. worn ring without taking head off? (Obviously my engine overheated due to HG failure as explained in a few of your videos).

[@germanf.bautista3868]

Really liked the video tnks man! Can Suggest somenthing? A Better mic may isolate Better the sound input of your voice with the engine running. I subscribed , keep up

[@mrhighway]

Hey Brian . A engine that have blow by is bad? My 2005 Durango 3.7L is burning oil with 130,000 miles. thanks

[@NotSoCrazyNinja]

One of my cars has pretty nasty blowby, but it didn't before it sat for a couple months. After sitting, suddenly blowby.

[@SamnissArandeen]

That engine is toast.

[@applepoop10]

+Samniss Arandeen Not necessarily, if your bottom end is still good. You can hone or bore out your cylinders and put in oversize piston/rings.

[@orbitaaltube]

brian great vid but where did you take the scuba footage awesome! Brian (also) from Ireland

[@almaxx12]

How would you test on a duramax LB7 that has blow by piston rings or injectors

[@j-soulfilms]

So if its shot and lose compression..the piston rings are worn out?

[@Wolfpack-219]

Thank you Brian

[@devilswish8876]

is there a way use blow by gases as a pump to the intake manifold for a seperat fuel tank Im refering to manual carburetors somthing similar to the SU carburetors

[@briansmobile1]

I'm sure there is. Any resistance will cost power though. Race engine builders look at engines as an air pump. Anything they can do to reduce reisistance and increase flow- they do it (within the rules).

[@taurus2001dohc]

Thanks a lot Brian your videos are the best on youtube!

[@briansmobile1]

You're welcome and THANK YOU!

[@kylewoodward7078]

Awesome video, learned something, new sub!

[@spiderdad00]

Great video Brian

[@AWD_T]

hey brian, can you do a video on undercoating. I'm not sure where to apply it. thanks

[@justayoutubeuser5437]

nothing is too much information thank you for every think

[@ronalddaub1710]

Don't worry about it unless it's puffing fumes out of the valve cover with the PCV valve on hooked of course but you don't want you memes coming out of the valve cover or you've got some worn-out ring s

[@bluebarrios]

Hi Brian, How do you fix engine blow by ?

[@hyzercreek]

+bluebarrios New rings??

[@bluebarrios]

+hyzercreek Thanks for letting me know. I changed the Engine and now the Car is running really Great.

[@briansmobile1]

New piston rings.

[@fordnut4914]

Another engine or rebuild

[@VitalityMassage]

Can an engine still have excellent compression yet the oil rings are bad?

[@VitalityMassage]

BigBlackNerd I've rebuilt my engines head. Compression is great in all cylinders and it still burns oil.

[@VitalityMassage]

BigBlackNerd It doesn't lean ANY oil and the head was professionally rebuilt by the Toyota dealer's machine shop. (highly recommended) Cylinders: 1 - 175 2 - 180 3 - 180 4 - 190/

[@VitalityMassage]

BigBlackNerd Thanks but not as cool as your name. :)

[@adamirfann6788]

maybe your block need a rehone/resurface

[@RyanM4N]

It's hard not to do a thumbs up when you're trying to say "that's cool" lol

[@RobsPackanShine]

nice tips...ty for sharing....awesome ending

[@adudc]

GREAT VIDEO MAN! appreciate this!

[@briansmobile1]

Welcome and thanks!

[@nathanielketteler6102]

Not all engines have blow by, we had a farmall c that seemed to suck in instead of blow out

[@Chris_905]

nice one brian , luv your vids ..

[@BELALI]

me, I change the segments of pistons diesel engine 2.0 l ... but now I notice the smoke that comes out of the oil cap with the motor rhythm, after asking the mechanic he confirm me that it will leave with the time, is it normal? ... I drove 250 km with the car, of course having to let it run 8 days in idle for reasons of 8 hours per day, now the draw of the car is a lot better but the story of the smoke, r disturbs me

[@saladsnake7911]

Great video ! You rock brian.

[@nestyjimenex7903]

How 2 coils can fire at the same time when 2and 3 and 1 and 4 are at the top one is in compression and the other is escaping

[@lawrencecavens5760]

firing order correction 1-3-4-2-

[@DrRawley]

you won't catch me in no ochan doin no cuba divin.

[@s0nnyburnett]

Could have bought another Tercel for what they're paying for in oil and fuel.

[@randabuffer6562]

Hi Brian!!! Can you please help me diagnose a problem with my car over text? I’d be more then happy to pay. Thanks

[@Funionjack]

Hey Brian is it a bad idea to use antiseize on sparkplug threads ?

[@SouthMainAuto]

That's a really controversial topic surprisingly enough. All spark plug manufactures will so never use it. I use it in my shop and will always use it. I live in the salt belt. Never seen it cause a problem in my life.

[@Funionjack]

South Main Auto Repair I have a passat tdi and changed glowplugs added some antisieze to the threads,( the old plugs were a bear to remove ,back and forth )

[@SouthMainAuto]

spark plugs, glow plugs, I use it on them both.

[@briansmobile1]

Plug makers don't want to get sued for someone stripping out a cylinder hole. They also say to install plugs with a torque wrench. I use it every time I do a steel plug into an aluminum hole. The key is to use a TINY bit near the business end of the threads and let it spin the rest of the way round and up being cautious not to rip the soft, delicate, aluminum threads out.- Remember, if you DON'T use it, you can seize the threads to the plug and rip them out that way! People say not to do things to protect themselves legally. They don't care if your plug rusts in- as long as it can't be blamed on them.

[@SouthMainAuto]

Common sense is like never seize. A little bit goes a long way. Us mechanics that use the stuff know what I'm saying. Use one dab of anti seize next thing you know its on your face up to your elbows and smeared on every tool you touch for the next two days...

[@Alex.1739]

How will this engine last now pls?

[@carslover3509]

thanks friend very great information

[@Th3Fly1ngCow]

Brain should either make shirts or magnets or something I can buy to promote I'd love a magnet for my box

[@briansmobile1]

I've been debating it and even designed some- this year is the year I'll do it!

[@deepsquat600]

briansmobile1 I second that ...just dont price you items there is no way I would buy them ..for instance a shirt for 15 $$ or so would be awesome ..25$ and I am not buying ( there are a few channels I subscribe to that well ..no way ...)

[@ccubsfan94]

deepsquat600 most of the time it's the companies that they use to make the shirts that set the price.

[@SpiritsoftheWolf]

i thought all 4 cylinder engines firing order are 1, 3, 4, 2.......

[@philipshaw9485]

Ford Kent engines are 1243, bit of a head f#£k if your fitting new HT leads and your not aware of it

[@hishamchohan494]

hi , you forgot to wear safety goggles man!

[@kensendelofski3761]

excellent video. Thanks

[@idleratchet]

Denso plugs FTW!

[@Pie4life123]

My 07 honda accord has this ! I noticed it after a oil change this week , i checked the oil level and they seem fine what should i do ? 120k miles 4cly honda 2007

[@billiebobbienorton2556]

Pie - you should head to your mazda dealer and pick up a 2016 at their year end special. hurry!!!

[@robh23a1]

Tune up

[@sethat8e]

I wanna see some more busted up junk like this.

[@kellyt5056]

When you said probably to much information, I said no such thing.

[@nestrac]

If you can't pick on your siblings then who... :-D (all in good fun of course)

[@SushiPac]

I bet that water felt good

[@canadapainter658]

what happens if I disconnect the crankcase breather from intake housing and let it hang downwards on its own.( but I plug up the air intake housing hole).. will it affect the engine?

[@drewx420]

I'd just run that breather into an apple juice bottle and rig another one coming out of it into the Intake manifold hole so its still a full loop but the oil gets trapped in the bottle. Just put a couple mesh coffee screens in it and bam 2$ oil catch can

[@canadapainter658]

drew= you did not answer my question... will it damage the engine the way it is now....hose is hanging and hole is blocked in air housing.?

[@briansmobile1]

It depends on the state of your valve train and piston rings. They main thing is polution. It could potentially get dirt in the engine if your rings are great and valves aren't.

[@kairilaicreampuffs]

To fix blow by will I need to replace piston rings and pcv valve?

[@Motoxcross]

yes

[@lukynater1]

Classy....

[@gichingawainaina8899]

thanks very educational

[@AndrewHollywood]

I wish you were my mechanic

[@ronalddaub1710]

Blow by does not necessarily mean it will smoke out of the tailpipe. after all it's the compression rings that cause Blow by not the oil ring I've seen car smoke out the tailpipe that had no blow by and I seen cars that have blow by not smoke out the tailpipe so that's not entirely true statement and I ve seen engines that had both

[@Creeperboy099]

could blowby cause oil consumption?

[@braydinjones6301]

Absolutely

[@josephmelville9141]

piston rings are stuck on the Pistons

[@hichamn4654]

No sharks :(

[@briansmobile1]

Hang in there till shark week. ; )

[@cheetoshotfries2289]

I have a 2014 accord v6 and engine is clicking

[@AaronsAutomotive]

I'd just like to take a moment to boast and gloat if I may.... 1982 gmc c20, with all original drivetrain... with the ORIGINAL 26'000 miles on it and never rolled over :) ...... Just took a piece of paper to the the valve cover there the oil filler is.. Not even a puff of blow by on it AT ALL :) even at the PCV valve no blow by at all :). And no the motor was never rebuilt or swapped out its all numbers matching :)

[@AaronsAutomotive]

Althou it may be just a hair but of blow by but not enough to make a piece of printer paper move. Will try with a tissue when I change the oil in the morning and see. That might make just a little shimmer.

[@briansmobile1]

+Aarons Automotive That's pretty good Aaron! Take car of it and it'll take care of you!

[@briansmobile1]

One of the two is like a dud firecracker each time. It's inert.

[@MrFreeze79]

i have a sneaking suspicion that brian secretly works for mobile1. someone back me up

[@billiebobbienorton2556]

bunk - back down.

[@MrFreeze79]

hah wtf ? I was just being cheeky, I like the guy, and his videos. besides, i posted that in march 2016.

[@billiebobbienorton2556]

bunkerbuster cheeky.....

[@micheals1992]

Disconnect the injectors and remove the spark plugs in cylinder 1 and 4 and run it as a two cylinder! Problem solved!... if you want to get more economy savings strip the engine and remove the pistons and rods from cylinders 1 & 4 lol

[@pinpon189]

And you will have a perfectly unbalanced engine.

[@micheals1992]

Gerardo A. H. it was more of a joke post... if you want an economical engine you might as well get one that's designed to be economical. you can get a 2 cylinder engine which is in the Fiat 500 (the 900cc twinair) but it's actually not that great, most people only get 45mpg... the Aygo has a 3 cylinder of a similar size (999cc) and most people get 55mpg. I own this car and I've averaged 65mpg from the day i've owned it and even got 80mpg on a recent drive on rural roads with light traffic traveling at 50-60mph. I had my dad along with me and he said that the engine was smoother then his 2003 mazda 2 with a 1.6L 4 cylinder, that's probably because it's a newer engine which also has VVT-i (variable valve timing) which keeps the engine near peak torque throughout the entire rev range (80% of the torque is available at 1500 rpm... peak torque is at 3600rpm)

[@clarkperez671]

Then how to fix it

[@BswiftxSwag80]

good job keep it up

[@tonybandz6793]

If I have blow by does it mean my engine has to be rebuilt

[@sc1338]

Yes