What Is Blowby? What Is Too Much Blowby?
HTML-код
- Опубликовано: 25 мар 2016
- Every engine produces blowby, but too much of it can be an indicator of cylinder damage or other engine wear. This video goes into what blowby is, how to troubleshoot it, and how important blowby is. Any questions can be left in the comment section and I try to answer the comments. Did this video help you save time or money? @AdeptApe on Venmo or AdeptApe@yahoo.com on PayPal for donations, thank you so much for supporting the channel!
You can help the Adept Ape Channel for free! Just click the Amazon Affiliate Link and any purchase helps the channel: www.amazon.com/gp/product/B00...
I’m currently in diesel technology school as we speak this channel help me with everything I’m a fan till day I die lol you really don’t understand how much this has help me
This was very helpful. Thanks, i was trying to gauge how bad my 04 5.9 was.
Your videos have been very helpful I just wish I had seen them sooner. There is a lot of things some shops can't check but they won't tell you or they don't know how. They were also enlightened. At my expense.
+Alice Stoneking Well let me know if someone actually pinpoints the problem.
This is my first time viewing your videos and I have to say I am now a fan! Great info! I used to work on Caterpillar truck engines in late 90's early 2000's and have seen this myself. I remember getting some with a scored cylinder pack that would puff fumes out of the blowby tube every time that cylinder fired. I miss working on these engines since I have been out of the game for almost 12 years but I am slowly working back into it looking to re-start my career in diesel repair.
+Erich Z-Rod Good to hear from a veteran of the Cat Truck Shop, what field did you go into that had you leave the Diesel Field?
I have been driving tractor trailers and am now in real estate. I enjoy driving trucks but real estate not so much. I have missed the diesel field for quite some time but seems difficult to get hired today without certifications. I have tried for Peterbilt, Cummins, and Detroit Diesel since we don't really have a Cat Truck shop anymore since they phased out. The only Cat shop we have now is more for heavy equipment and I don't really care to work on the machines, prefer trucking. Seems like the ones getting hired have technical school and certifications but little experience. My old Cat job was old school and basically just trained on the job so I left without much to show and now I have been out of it for some time. They have since closed shop since the Cat truck engine market kind of died of. Thanks for the reply
+Erich Z-Rod Yeah, not a huge future in a lot of the Cat Truck shops. Hopefully ours will stay open for awhile longer before I have to transfer to a different department. Glad to hear from you, good luck on your search for a career.
+Adept Ape thank you. I'm not giving up on it. I still do some side work occasionally but miss the shop environment
Thanks great info, I work on much larger engines (c175) and trucks 793f/d) but still very informative.
Great videos. I deal with CAT engines all day in the military so it was pretty awesome stumbling across your channel.
+Googly Googlemaster (thisguyfromnowhere) I'm glad you like the channel.
Very informative. Thanks for posting! 🙌
Thought I'd mention that different engine manufactures run this test differently, i.e. idle no load to high idle no load. Just so the viewer knows but depending on engine manufacture you can have other causes of high blowby. Such as a bad air-compressor. A leaking intake manifold/valve cover gasket bad oil seperator. It's getting to the point now a days that the rule of thumb is getting thrown out the window. Love your videos keep them coming. :)
+Travisfromoregon Thank you for your input.
Thanks for the good info mine dont look bad after that lass one in the vid!
Very informative. Keep em coming.
Hi Josh :)
Again a lot of useful informations ! My 3208 has a little of blowby from the crankcase breather. Not so much, but there is. I have the valve lash to do (quite 3000 hours on the engine clock) and I guess it was never rebuilt. I just ordered an oil sample analysis to see what's going on.
very good information, keep em coming
Thank you for the kind words.
Thanks man for valuable info.
Good morning Josh!
Came back to this video as we have a truck in the shop that had combustion gasses in the cooling system and it received a long block (PACCAR MX-13). The truck now has blow by both out of the oil fill tube and the crankcase tube.
For transparency the technician that did the install was inexperienced and did not replace the oil cooler or flush the oil module (Claims there was no metal) and they used about a half a can of ether over the course of an afternoon as they could not get the truck to start initially (Bad High Pressure Pumps). CCV filter has been replaced.
He was told to drop the pan and inspect the liners from the underside. He found a small vertical mark on cylinder 2 and orders from above were to replace the liner and rings on said cylinder. He stated to me he couldn’t really feel it with his fingernail.
I don’t believe it will solve the issue. After his repairs I’m looking to come up with a strategy to isolate the source of the blow by. This is what I have come up with:
Bring truck up to operating temperature. Verify blow by.
Disconnect air compressor inlet and outlet to isolate air compressor. Run unit and revaluate.
Pull rocker shafts off to ensure closed valves. Remove turbo feed and drain tubes from block. Pressurize turbo inlet to check turbo and intake valve seal integrity. Revaluate unit.
With the rocker shafts out pull all 6 injectors and perform a cylinder leak down test on each cylinder.
Wanted to see if you have any input? I can email you a video of the blow by and the mark the technician had found. It was his first major engine job and I’m preparing to take over his work.
Also metallic glitter was found in the oil pan once he dropped it to inspect the liner bores!
Thanks for your informative video.
Good stuff to know (which I did not) and Buddy deserves an Academy Award! What a nice pooch! Thank for the Education!
+Frank Swain Buddy says thank you.
Hi u simplify technicien information and put it in excellent order , this simplify things
Remind me of a truck at work, had blowby as bad as the RV and burned 8 gallons of oil a day. They used it that way for about 10 months
Great Video I Really Enjoy It
A turbo may cause crankcase pressure but by definition is not blow by. Blow by is literally gases blown by the rings in a cylinder.
Great video man! good to know info
+JoseGonzalas Thank you.
Great video! Thx.
Great video Josh greetings FROM THE UNITED STATES VIRGIN ISLANDS IN THE CARRIBBEAN US TERRITORY ST.THOMAS I AM A NEW SUBSCRIBER TO YOUR CHANNEL YOUR VIDEOS ARE SPOT ON I AM A JOURNEYMAN HEAVY EQUIPMENT MECHANIC MY DAD TAUGHT ME ABOUT HEAVY DUTY TRUCKS AND EARTHMOVING EQUIPMENT REPAIR HE PASSED AWAY LAST YEAR 2019 SO I AM GOING TO PERSUE THIS TRADE FULL TIME SO I AM WATCHING YOUR VIDEOS ON YOU TUBE AND READING SERVICE MANUALS AND I AM GOING TO GET MY CDL SOON THANKS FOR THE GREAT CONTENT GOD BLESS YOU AND YOUR FAMILY KEEP THE VIDEOS COMING
Nice explanations,thanks;
And if the crankcase is pressurized,the oil cannot drain down from the turbo? and ends up in the intake pipes,and then,you have a lot of blue smoke from the exhaust?
And,that can lead to engine RUNAWAY???!!
So accurate. I always said when a Cat engine idles and it has that sweet oil smell it's going to blow up real soon. Also I don't know why some Cat liners have a real noticable taper after many hours verses a Cummins..Maybe because Cat depends on Two compression rings as other manufacturers use more rings for this purpose.
I have also heard that if you removed the oil fill cap - and feel strong puffs of air coming out of the oil fill hone (with engine running) - that often means the rings are bad.
Thanks for the tips!
How long did the owner/driver run the RV like this?
What % of power do you believe was lost? Fuel mileage percentage?
Great information
I have a question about blow-by. What if you have blow-by at idle and it goes away when you Rev up your engine.
What could be the cause?
Thanks
Very helpful
I know nothing about engines but removed my oil filler cap on my diesel and it was puffing air out like a steam train. No smoke or colour, just air and oil.
Good vid.
I used Xado Atomex totalflush and after oil change, Rislone Compression repair when my car got excessive blowby and oilburn. It actually worked.
Good piece of troubleshooting technq
Thank you, I have been getting comments that people would like some troubleshooting videos, so I figured why not start with this. Thanks for commenting.
Thank you sir
Awsome video!! We want MORE cat C15 specific videos...the videos would help save some money if I can do my own labor
+Isaac Avila I'll be making them, although I've got a new member to the household coming up so the spring time might not have as many posts as have been.
Adept Ape I understand brother!!! Congrats and we will settle for what we can get...no worries
Great Vedic 👍👍
My c15 acert had tons of blow by when hot. After replacing my high pressure turbo it all cleared up.
I’m interested in that tool to measure flow out the blow by tube. I currently use a manometer and that is a lot less hassle.
Good info
great video
thank you man
hey Buddy, I subscribed!
I'm seeing oil leaking from the intake hose seals next to the turbo and also from the oil cap. Compression test was done on this engine a few years ago and it was perfect, also I don't see any smoke from the exhaust or loss of power. Is it likely that turbo seals are the problem ? I looked at PCV valve too and at least some air is escaping from it when idling, so it's not fully clogged or something.
Adept ape where can i buy that caterpillar blow by tool in the video I'd like 1 to test my cummins
Removing "broken" exhaust manifold studs would be a GREAT video !!! Just saying
I got mbe4000 pre emissions
This happens only on cold star 80 to 90 degrees in the am
Engine star shaking hard to crank up
Engine light comes on..but it goes away 3 to 5 minutes later.and truck like a champ..I seen a decline on oil pressure too
Good informative vid, I have a 16 6.7 f350 with a ccv delete, I do get a slight haze at idle but nothing crazy (265K kms)
Could I take my pickup to a CAT garage and have them perform this test?
Good video
My c7 has a lot of blowby only at a cold start. It only has about 185k miles currently. My mechanic said to just keep up on the oil level and it should hold up. What's your take on this?
I have blowby on my 05 C7 but the engine runs good. If my engine stating to wear out is there a lubricant I can add to the engine oil besides Lucas ?
Great videos sir. Thanks for all the masterful knowledge. I have an '07 W900 with a C-15. Last week it blew the oil fill cap off & pushed out 4 gallons of oil while pulling a load. I replaced the cap & oil and within 10 miles it did it again. We put a pressure gauge on the filler neck & without a load were only able to generate 1-2lbs pressure. A compression test indicated all cylinders are sealing within spec - they should be as this engine has 17,000 miles on it since a complete in-frame. The thought is that the high-pressure turbo has lost its oil seal & is pressuring the crank case. Before the expense of replacement is there anything you would suggest we look for? Thanks again, my son & I really appreciate your vid's.
+Mike Sutton Thanks for watching the videos. You can try pressure testing the intake to the turbos and see if one is leaking. I discuss it somewhat in the CAC test video. You would have to be inventive with the building of the test setup though unless you have an Aftercooler tester.
Woof !!
@@AdeptApe where is your shop located
Holy shit
Just because something makes sound through a mic crackly doesn't mean that sound is called static. Static noise is only caused by stray electricity or bad tuning or signal.
Hello , I was looking for a video where you talk about a truck with a new rebuild had a blow by for idle too much
Great video, can’t seem to find a blow by gauge for sale lol, I see stuff by jtc but no way to buy one lol
my cat 3116 have blow by after the engine warms up ? Could it be the engine or the valve seals ? I had a overhaul engine rebuild about 60 000 miles ago and unless something was done wrong I don’t think it’s the block
Good info thanks. A quick question. I've been getting engine oil in my radiator. I have a cat c-15 single turbo, I check the oil and there is no sign of coolant in it. You think it could be the oil cooler.
+Anniel Perez Could be the engine oil cooler, or your transmission may have an oil cooler as well, I've seen both be the cause of that.
check your inter-coolers they cool engine oil with radiator water ;;
Blown head gasket cars fucked
What happens on a diesel if you eliminate the valve seals turbo and air compressor pull apart the engine and the liners and pistons have not al wear. What could be causing the blow by
I have a 3406e.. Blow by is not excessive. Yet it will blow off the oil fill cap fill cap or the dipstick if it is not tied down under load.. blow by tube is not clogged or restricted
has anyone replied to your post?
Great and very helpful.. I was wondering if you could help me with my 06 accert just had platinum done on it about 15000 miles on it.. we changed all the fuel lines both fuel filters based and fuel transfer pump.. it’s getting lots of blow by and running like crazy ruff on idle.. I don’t know what else I can change on it? I would really appreciate your help on this please thanks
Hey Adept Ape! Great Channel, I've watched almost every video you have on the C7! Great Channel!! I do have a question for you about an 05' C7 in a straight truck I have. Mechanics found that cyl 5 either has ring damage, or cylinder damage, basically rebuild time.. BUT i'm 1500miles away from home with the truck, can I just unplug the cyl 5 injector and limp home to prevent more damage to the engine, and get her rebuilt at home?
If you already have cylinder damage or a broken ring, then you can unplug the electrical connector to that injector to prevent the injector firing into a dead hole. You should be able to run it home without a problem, obviously you'll have a lot less power. These engines don't have liners though, you probably knew that, so you'll have to get a new sleeves machined in or get a new short block. Let me know if you have any other questions, and subscribe please.
I was going to say that just be mindful, watch your oil pressure and keep your ears open for any knocking. Hopefully you don't have a piston coming apart or something, but it's most likely cylinder scoring. You just don't want to throw a rod. Just be mindful of any weird noises or oil pressure changes. Good luck.
Perdonally, I think the crankshaft would nmbe toasted running 1,500 miles, countess thousands of revolutions, with a missing fire sequence.
I hate it and grind enamel off my teeth when my truck-tractor misfired intermittently while warming up in cold ambient temperature.
Cost of crankshaft vs tow: probably less expensive to drive it.
What is the model of the tool that you are using? thank you in advance
I guess this one qualifies as a destruction of the week at the end lol.
🤣
What of engine breather is bringing out oil
Your videos are all very helpful. I have a Peterbilt with C13 DPF filter and I want to swap it with a C15 with no DPF filter. Is that legal? I don't run Cali, only stay in the north east.
I don't believe it is legal with the EPA and since your truck is a 2007 or newer, a knowledgeable DOT inspector may notice that your engine isn't an emissions engine. Now depending on what area you are in they may not notice, but if you got caught it could be some big fines. I understand wanting to put a more reliable and powerful engine in your truck, but I would hate to mislead you. If you know someone that has done it in your area maybe you can discuss it with them, but as far as I know, it is risky. I'm glad you like my videos, In going to be doing a regen class soon as well so if you want to know more about your emissions maybe check it out when it comes out.
Thank you for your informative Cat videos. I have a 6NZ with 1,355,659 mi on it and she's showing signs of wear. I am about to have a rebuild done on it and was wondering if you could advise on what we should know about rebuilds beforehand, tips, and suggestions so I can get her to last another 17 years and another 1.35 million miles. Thanks, and keep up the good work!
+Michael Jester Get a Platinum Kit and get the counterbores cut and you should have a reliable engine for a long time.
That's the plan! Thank you
It could also be Oil Seperator!!
Hi,i love your videos they are educational.Iam from Australia. I have 2014 kia sorento diesel2.2 oil coming from turbo it has only 29000 miles on it.put new turbo still have the same problem ,any suggestion please I need your help,thanx so much to you and every one watching the channel
+Kjk Alm Where is the oil coming from? The intake housing or the exhaust housing? You might have a plugged crankcase fumes filter, this would cause high crankcase pressure and can make the turbo appear bad even though it isn't.
Can you provide the part number for the meter device shown in the video?
PLEASE
I have an engine (C15 acert) and it has oil leaking at the top of the air compressor. Is this due to blow by or just something that's common with the air compressors?
Got a Cummins N14 with excess blow by still after the rebuild. Replaced air compressor, had the heads checked up again, replaced piston rings again, and still showing excess blow by. Any suggestions?
great video. I always ran leak down tests if i suspected high blow by to help isolate the problem, but this is a cool way as well. How would i know how many times to multiply (1.5-2) for any given engine? Does CAT or most major engine manufacturers have specific values for this blow by test?
Hey Regal, so the 1.5-2x is the Cat spec on their truck size diesel engines. They vary depending on serial number. A C7 may be 1.75x or a twin turbo C15 might be 2X, but a good rule of thumb is 2X. The problem with leakdown tests is they are hard to do in a diesel setup. The automotive ones are great since you just pull a spark plug and your ready to go, but that could take hours to set up on say a 3406 then you have to reseal all the injectors. Our shop doesn't even have a compression or leakdown test kit. You can try doing a cutout test and watching the blowby to isolate a bad cylinder, that works at times if you have a single bad cylinder. Now when it comes to all engines, gas and diesel, I'm not sure what a good specification would be since a non boosted engine should have significantly less blowby normally, probably 1x horsepower would be my guess or maybe 1.5x for high compression. Thanks for the comment.
+Adept Ape Yes leak down tests take long time as you mentioned each injector must be pulled. What do you do when there is no dedicated crankcase breather? I have a pair of Detroit diesel 8v92s and I dont think it has a crankcase breather?
+Regal2800 Hmmmmm, A Detroit question eh!? A 2 stroke at that too, I'm not super familiar with those engines, but every piston engine produces blowby. Do these engines recycle the crankcase fumes into the intake perhaps? Those engines are so unique compared to the traditional inline 6 cylinder 4 strokes that I'm used to, I would have to say I'm not familiar with them enough to really know too much about them. Let me know if you find out where they route the crankcase fumes.
+Adept Ape Well there is a breather vent on each of the valve covers and in my particular case there is a airseps device mounted to each turbo to help create less pressure in the crankcase. (Help those detritus leak less....) But this technique you used is very interesting and helpful in troubleshooting. I need to check on my 6.7L cummins and see where the breather vent is. Thanks Adept, i learned a useful new technique
+Regal2800 Your welcome, hopefully your shop has a blowby meter. Good luck on your 2 strokes Detriots.
So it means a new engine or rebuild ? And how much approximated price for cat 3126 rebuild ?
So is my Perkins diesel shot if it has blow by that looks like that RV at idle when it is at full throttle ?
4.5L turbo intercooler diesel
Runs perfect, idling perfect but burns oil (blue smoke, smells burnt oil) when accellerated or put under load.
Smoke comes immediate at metioned, smoke stops immediate after load release.
Whats your educated guess ?
Ogre Under Bridge
White- oil burning through turbo exhaust, turbo, cylinder ware, valve seal, or blow by.
White smoke at start up after a duration of time(sitting over night) means a injector is leaking.
Where is the primary and secondary speed sensor location on a 2001 c15 6nz?
I have a lot of blowby after chilli.......but seriously great vid your a good teacher.
That is a different type of blowby I believe, but much more hazardous. Thank you for the kind words.
Where can I purchase one of those blowby meters ?
How could poor pump timing affect blow by?
I have oil coming out of the dip stick on a 350 1991 model I suppose its the original motor. its coming out pretty quickly especially with throttle. I am going to try the PCV valve that is pretty Gunk looking. I just bought this truck and what a dummy I know. I will try this first then look at the blow by tube if it has one??? Not sure if it has a blow by pipe. Any help or suggestions will be appreciated.
I need that blow by measuring tool
Hey I need a answer on a problem I'm having with my 3406n 425hp I'm getting oil going thru my exhaust manifold I thought maybe it was the turbo but that wasn't it vfc what can I check next pokey at demboyztruckin359@yahoo.com
Hey ADEPT i got a customer that has removed breather kit from his motore when he bought the truck.According to the serial number . Hew was wondering if he can use the 292-4303 kitt to put it back on his truck. Originally the oil pan slump was in the front of the engine , but since the truck is car carrier he had to swap the oil pan to the rear. you think you can make a video of the Crankcase breather kit installation?or is it a good idea to put it back on the engine???
Apeman, wouldn't you say that twin turbo Acerts, by their very nature, produce more blowby then their predecessors?
Thanks for all the great vids!
Same question i have on mine it has a bit of a drip of oil especially if im speeding over 70-75 mph for a wile n bearly drips on iddle but it does
We have the same problem with that motor in one of our triaxle dumps
Will an engine still run with excessive blow buy, old david brown tractor model 990 1967 and 76, they start very easy plenty of power??
thanks great advice
Just did an overhaul on my c15 accert at the rush in pharr tx. Well right of the bat I have blow by . Engine blows smoke like a high mileage Detroit diesel. Took it back and they said it run it for a few months before making a insurance claim. I told them if it could be turbos or air compressor. Well they said it could but they don't know how to physically check if they're bad or where the blowby is coming from. Well I ran it 26000 miles and I'm tired of seeing that smoke. Tomorrow I'm taking to cat and have them figure it out I hope it's not a bad installation.
What did it end up being
Did you see if it was the crank case spinner filter
i have hino e13c engine,.too much smoke coming out from the breater..what is the cause..the smoke is the if you are smoking.
Hi, First I must say, great video with so clarity is explaing the issue. I have a 2006 Cadillac SRX 3.6 and get engine oil drops when i park after driving, mechanic says it is a blow by from pcv. Just before this I had the transmission oil leaking so oil cooler and cooler lines were changed.....are these problems related in any way ? My mechanic is now suggesting an oil catch can. Do you think if there is a permanent fix or oil catch can is the only way. pl. help. Thanks
Well I'm no Cadillac expert, but I'll give you my free opinion (you get what you pay for). An engine oil leak doesn't have anything to do with the transmission cooler, as they are separate systems. The PCV system should keep the blowby under control by allowing the intake to ingest the blowby and oil fumes. So if you are getting an oil leak you probably have a problem with your PCV system that fixing should stop the leak. Now a catch can would stop the leak from getting on your driveway, but the engine would still have PCV problem. Sounds like what your mechanic said makes sense.
Question what a out if you have oil coming out of tge blowby tube. ??
I have a Mitsubishi Fuso FE160 2012 they say excessive oil in the turbo hi crank case pressure truck runs fine doesn't use any oil but they are saying to replace the engine
I just bought a 2010 isuzu npr with the 5.2l diesel. Has 197000 miles on. Have you seen these engines before and are there any common failure points on them? I heard they run a long time if you take good care of themm mine was a rental at ryder. So far its on good shape. Im thinking about buying the idss diagnostic system for it also.
I've worked on these for years, the biggest thing to watch on these is keeping the fuel filters changed every 3 months, don't overheat it and make sure it does it's regens properly
Does blowby happen in gas compressors too ?
What about if i have oil coming out of my C-15 blowby tube? Not a lot of oil but when I park for 10 minutes there will be a couple drops on the ground, I hardly have any blowby tho
Does a clogged catalytic converters causes blow by?
Have a new brand perkins 1104a 44t engine and I'm getting oil coming out the dipstik and slight smoke
This problem started after I got a cat reman Ecm I was told to get new injectors I did. Then I was told to have the new injectors pressure tested. I did there were two hanging up I was told. Several dyno pulls later still no change. Oh and a bar and plate air to air. Just now tried a new ecm. No change. I've got to figure this out before I'm broke. Oh but wait now they want me to buy two new turbos. This has to be it.
What shop are you at, is it a Cat shop? It sounds like they don't know anything.
Hey brother
I got oil coming out by blowby about 1/4 small water bottle every week.
They told me to rebuild the engine.
Did i rebuild? What's ur advice for this
Thank's
Crank case Blow by or pressure?
Whats the part number for that blow by tool?
H Josh i have question i got c 15 bxs recently rebuilt is runing like 600 hundred miles and is have it oil by the crank case breather when stop i see it
Have a 04 peterbilt 379 with a cat c15 mbn, it stars dripping oil through the blow by tube, when i drive it for an hour or two, what can caused this?