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
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.
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.
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.
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.
@@AdeptApe I have a 2007 Pete with a c15 double turbo and have it repaired with a platinum kit like a year ago. By a local shop and now my truck it’s blowing oil from the deep stick I replace the mentioned part with a new one bout is doing the same. I put tape around the tube. Deep stick. And it won’t Leak what can be causing that. Please Thank you.
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.
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.
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. :)
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.
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.
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
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
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.
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
Can you really get exhaust gases into the crankcase through the turbo bearings? I would think that the oil pressure on the bearings would be much higher than the exhaust pressure would ever be? Meaning that oil would be pushed into the exhaust before exhaust would be pushed into the crankcase through the turbo.
+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.
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???!!
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.
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.
I've had 2 trucks....2ws and 6nz... both had high blow by... both ended up being bad air compressors pushing air into the crank case. Both diagnosed by problems building air and excessive oil in air tanks.
@@richieb6970 pulled the dash cover to change some bulbs and there was oil dripping from the supply line. Changed the compressor and it solved the problem i was having with oil spraying on my tank when under boost
@@richieb6970 a dead giveaway is if you have engine oil dripping from your purge valve. I reccomend replacing the entire air dryer assembly and governor at the same time as the compressor so you have almost all of the oil out of the system. Go about 6 months, then change the air dryer cartridge. My 2ws was way worse and of course google had me thinking worst case scenario. Some old school guy talked me into starting with the compressor and im glad i listened.
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.
Curious... '03 Cummins ISL (8.3), at start up should I have a pulse/pressure coming out of the oil fill? ZERO smoke, just pulsing air. Is that normal or a sign of something? Thanks so much for all your videos!
Bad air compressor, yes it can cause excessive blowby . Low oil pressure not sure. In my case it was the Jake brake solenoids dumping oil causing low oil psi
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
I'm probably thinking of it more in a petrol engine sense, with a petrol engine you just get smoke, with a diesel the seals go, and you get a runaway ;)
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?
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.
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?
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
It's official an in frame and turbos. I'm like Johnny Cash I got it one piece at a time but it cost me every dime. I think these shops know exactly how much money I have.
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
You simply max out air pressure and see if blowby continues at high bowl pressure.. if blowby is still too high the lungs may need replacement or showing signs of excessive wear.
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
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.
I used blow by to help me diag a failing turbo on my 03 Cummins. Got the truck @ 207K no blow by issues noted at the time. 217K later I start noticing oil seapage out the CCV seal and oil cap as well as the turbo drain tube hose. I'm also running richer than normal with alot of soot under the bed (4ft of my exhaust broke off so it dumps under the front of the bed). You can smell it. I get it up to operating temp one day its around 60* ambient outside so I lean on it to get it to 190*, pull over pop the hood check my CCV while flicking my throttle lever. I notice a high pitch sound as the turbo is spooling down from me reving the engine. I put one hand on the compressor housing and flick the throttle lever again, the comp wheel is vibrating back and forth as it slows down from high rpms. A few obscene words later and a 15min drive back home I pull of the intake and wiggle the wheel not only to find it having excessive axial play but an oil seal has broken internally. So I put everything back together and get to thinking. I have a known compressor side leak, If at load or highway speed; that wheel is building enough pressure to push back against that blown seal to send pressure down the oil return to the crank case, It could be causing the increase in crank case pressure that im seeing. I'm now awaiting a used HE341W from Indiana to rebuild and drop in to test my hypothesis.
I have a 6.7 Cummins deleted, I take the oil cap off after it is at operating temperature and there is a steady vapor trail, I put the cap on upside down but the cap will not move at all so this is a good thing but is the vapors normal? Sorry about the dumb question.
I have a LML Duramax does the same thing....shoots off vapors, but cap doesn't move at all.....could also be location of the fill tube ..but would like if he chimed in
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.
My air compressor played up on my Volvo fh16 16L engine and now after not using truck for 2 months it works fine and build up air but sometimes days up , my engine also just recently started blowing white smoke from breather , can you help ?? Do u think I should replace air compressor ? Could my air compressor be the reason to white smoke / drips of water-ish oil from breather
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!
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.
I got a 2006 isuzu fvr with isuzu motor 280k miles on it...I have blow by but the truck seem to rum good..I do have a check engine thT won't clear but no code...have you ever seen that...
My 2006 isx Cummins was rebuilt 2yrs ago and it has blow by coming out the dip stick and oil cap. I replaced my turbo,crankshaft adapter, crankshaft speed ring, and Cummins dail pin. Im sure what else to do, it burns diesel I feel to much.. Can somebody respond to this please…
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'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.
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
![Is your Engine Damaged? | Blow-By & Engine Breathers [GOLD WEBINAR LESSON]](http://i.ytimg.com/vi/TvazViNq12M/mqdefault.jpg)
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.
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!
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.
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.
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
@@AdeptApe I have a 2007 Pete with a c15 double turbo and have it repaired with a platinum kit like a year ago. By a local shop and now my truck it’s blowing oil from the deep stick I replace the mentioned part with a new one bout is doing the same.
I put tape around the tube. Deep stick. And it won’t Leak what can be causing that. Please Thank you.
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 this
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
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.
Thanks for the good info mine dont look bad after that lass one in the vid!
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.
Removing "broken" exhaust manifold studs would be a GREAT video !!! Just saying
Thanks great info, I work on much larger engines (c175) and trucks 793f/d) but still very informative.
Thanks!
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.
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.
I used Xado Atomex totalflush and after oil change, Rislone Compression repair when my car got excessive blowby and oilburn. It actually worked.
Very informative. Thanks for posting! 🙌
very good information, keep em coming
Thank you for the kind words.
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.
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.
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 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 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
Thanks for your informative video.
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 can’t stop smoking crack
@@deandrechristopher7001 I need a hit
@Keenan Bryant robots these days
My c15 acert had tons of blow by when hot. After replacing my high pressure turbo it all cleared up.
Very informative. Keep em coming.
I guess this one qualifies as a destruction of the week at the end lol.
🤣
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
Can you really get exhaust gases into the crankcase through the turbo bearings? I would think that the oil pressure on the bearings would be much higher than the exhaust pressure would ever be? Meaning that oil would be pushed into the exhaust before exhaust would be pushed into the crankcase through the turbo.
Good vid.
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
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???!!
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.
Great Video I Really Enjoy It
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.
I've had 2 trucks....2ws and 6nz... both had high blow by... both ended up being bad air compressors pushing air into the crank case. Both diagnosed by problems building air and excessive oil in air tanks.
I dont know if your still on youtube but if you are I have some questions I think I have the same problem
@@dirtbikefin5683 yeah im still here. Whats going on?
@@sradman750 how’d you test it to find out it was the air compressor
@@richieb6970 pulled the dash cover to change some bulbs and there was oil dripping from the supply line. Changed the compressor and it solved the problem i was having with oil spraying on my tank when under boost
@@richieb6970 a dead giveaway is if you have engine oil dripping from your purge valve. I reccomend replacing the entire air dryer assembly and governor at the same time as the compressor so you have almost all of the oil out of the system. Go about 6 months, then change the air dryer cartridge.
My 2ws was way worse and of course google had me thinking worst case scenario. Some old school guy talked me into starting with the compressor and im glad i listened.
Thanks man for valuable info.
Great video man! good to know info
+JoseGonzalas Thank you.
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.
Curious... '03 Cummins ISL (8.3), at start up should I have a pulse/pressure coming out of the oil fill? ZERO smoke, just pulsing air. Is that normal or a sign of something? Thanks so much for all your videos!
Great video! Thx.
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.
Can you provide the part number for the meter device shown in the video?
PLEASE
Good info
thank you man
Can a bad air compressor cause a ton of blow by and low oil pressure? Great videos!
Bad air compressor, yes it can cause excessive blowby . Low oil pressure not sure. In my case it was the Jake brake solenoids dumping oil causing low oil psi
@@Bigred03 preciate the info!
Very helpful
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?
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
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
I'm probably thinking of it more in a petrol engine sense, with a petrol engine you just get smoke, with a diesel the seals go, and you get a runaway ;)
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?
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 Vedic 👍👍
You should be Post Malone for Halloween next year.
hey Buddy, I subscribed!
great video
Adept i love you
Good video
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.
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?
He sounds like he’s hiding a heavy southern drawl to me...
whatrthose 😂😂😂
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
How could poor pump timing affect blow by?
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
It's official an in frame and turbos. I'm like Johnny Cash I got it one piece at a time but it cost me every dime. I think these shops know exactly how much money I have.
So you had an ECM replaced, now they determined that basically everything needs replaced too? I think you need to change shops not parts.
I feel the pain 30K
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
Adept ape where can i buy that caterpillar blow by tool in the video I'd like 1 to test my cummins
Will a blocked blowby tube result in oil getting into exhaust pipe from the turbo charger?
check pcv
What about measuring blowby coming off a bowl? 💨
You simply max out air pressure and see if blowby continues at high bowl pressure.. if blowby is still too high the lungs may need replacement or showing signs of excessive wear.
Thank you sir
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
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
So it means a new engine or rebuild ? And how much approximated price for cat 3126 rebuild ?
I used blow by to help me diag a failing turbo on my 03 Cummins.
Got the truck @ 207K no blow by issues noted at the time. 217K later I start noticing oil seapage out the CCV seal and oil cap as well as the turbo drain tube hose.
I'm also running richer than normal with alot of soot under the bed (4ft of my exhaust broke off so it dumps under the front of the bed). You can smell it.
I get it up to operating temp one day its around 60* ambient outside so I lean on it to get it to 190*, pull over pop the hood check my CCV while flicking my throttle lever. I notice a high pitch sound as the turbo is spooling down from me reving the engine. I put one hand on the compressor housing and flick the throttle lever again, the comp wheel is vibrating back and forth as it slows down from high rpms. A few obscene words later and a 15min drive back home I pull of the intake and wiggle the wheel not only to find it having excessive axial play but an oil seal has broken internally. So I put everything back together and get to thinking.
I have a known compressor side leak, If at load or highway speed; that wheel is building enough pressure to push back against that blown seal to send pressure down the oil return to the crank case, It could be causing the increase in crank case pressure that im seeing. I'm now awaiting a used HE341W from Indiana to rebuild and drop in to test my hypothesis.
Was your hypothesis right brother? asking because I’m having similar issues
Where can I purchase one of those blowby meters ?
I have a 6.7 Cummins deleted, I take the oil cap off after it is at operating temperature and there is a steady vapor trail, I put the cap on upside down but the cap will not move at all so this is a good thing but is the vapors normal? Sorry about the dumb question.
I have a LML Duramax does the same thing....shoots off vapors, but cap doesn't move at all.....could also be location of the fill tube ..but would like if he chimed in
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.
Hey my friend you did mention that bad air compressor can cause blow by.does that mean if you fix the air compressor you won't get no more blowby?
My air compressor played up on my Volvo fh16 16L engine and now after not using truck for 2 months it works fine and build up air but sometimes days up , my engine also just recently started blowing white smoke from breather , can you help ?? Do u think I should replace air compressor ? Could my air compressor be the reason to white smoke / drips of water-ish oil from breather
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
Can you do another blow by video
It could also be Oil Seperator!!
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 ?
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.
I got a 2006 isuzu fvr with isuzu motor 280k miles on it...I have blow by but the truck seem to rum good..I do have a check engine thT won't clear but no code...have you ever seen that...
Whats the part number for that blow by tool?
My 2006 isx Cummins was rebuilt 2yrs ago and it has blow by coming out the dip stick and oil cap. I replaced my turbo,crankshaft adapter, crankshaft speed ring, and Cummins dail pin. Im sure what else to do, it burns diesel I feel to much.. Can somebody respond to this please…
Have a new brand perkins 1104a 44t engine and I'm getting oil coming out the dipstik and slight smoke
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?
What of engine breather is bringing out oil
can a loose injector compression is leaking past be a root of blowby.
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'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.
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.