What Is Diesel Blow By?
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You’re a super humble guy you have helped me a lot on my dmax detailed work with the average joes tools
Thanks
You answered my question in 30 seconds. My 7.3 has 360k miles with normal blowby! Nice.
Awesome video, will remember to check for blow by when I pick up a diesel in exchange for my VW. Only have an old 3/4ton naturally aspirated gasoline fueled truck atm.
New to the channel and I just learned something. Thanks for sharing
Very informative and helpful all the way through. Thank you!
I bought a used 2013 Chevy Silverado 2500HD 6.6L LML Duramax with 144,645 miles on it. 100% stock and very clean inside and out. I did the oil filler cap blow by test at the end of my test drive, I bought the truck from a chevy dealership, and when I arrived at the dealership to check it out, they had it running and ready to go so I couldn't check blow by at cold start. But warmed up to full operating temperature the cap just sat there and didn't move. I ended up buying the truck, and at cold start the oil fill cap again just sits there when placed upside down on the oil filler neck. I'm going to be changing my oil with Rotella T6 and using WIX oil filters about every 4,000 miles. 3,500 / 4,000 miles. Keeping the oil clean goes a long way. It's cheap insurance, well maybe not cheap with Biden in office but it's still easy insurance.
Give a Bosch filter a try sometime
@@jayweathers2701 fuel or oil?
Love the videos, I have learned a ton from you and the people you know. Your mechanic friends and you have help me learn about diesels. Your videos made me buy my first Duramax (LML). It was the information and videos that you provided, help me decide what truck I really wanted (gas or diesel). I really appreciate your mechanic friends for there time and knowledge, and can’t wait for more awesome videos that you create. Instead of Truck Master, you should be the Truck Professor. It’s great to see you and your wife spending quality time together and building a truck. This encourages females to get there hands dirty and become great mechanics.
Thanks
I second that!!
Yea, myself as a green horn LML Duramax owner I've learned a ton. This is my 1st diesel I've ever owned and I'm not bad at pulling wrenches, but this is a whole new animal for sure. My trucks 100% stock but my 1st priority is a lift pump. I've got the 100gph Air Dog lift pump sitting on my bench waiting for warmer weather (Minnesota) to get it installed. I'm the mean time, I'm doing resonateor cap, PVC cap, hot side pipe intercooler, cold side pipe intercooler and I'm just going to put a K & N air filter in the stock air box. What exhaust can I do to get it sounding more like it should? I'd like to delete the filter, DEF, and cat but it looks impossible to get er done thanks to EPA. I've reached out to a few exhaust companies and I get a return email saying it's no longer possible to straight pipe my truck, so wondering my options to get it sounding better.
very informative video all diesel owners should definitely watch! well said sir!
Thanks 🙏
I've been looking to buy a Z code for a while now and I'm so happy to find your channel. Thank you.
Thanks
Cummins FSM states blowby test is to be done with a manometer and under load. Obviously this is not practical when looking at a truck in the field so the ol cap dance test is a good secondary.
Hey man love your channel...I have a 17 Colorado Duramax leagues different from 2500 or 3500s but still enjoy it.
Looking forward to the cold air video. Always wondered if the high flow bundles are worth it. Keep up the great videos
Thanks
i had a nice Blowbamometer i purchased and was able to check the actual crankshaftcase pressure.
Great video. Well explained
You're a good dude thanks for sharing ur info on this it helps people out Good bless brother just subscribed
Thanks Chad
Thanks for the tec info
I’ve got one with 723000 miles and very minimal blow by, also u need to plug the crank case exhaust valve to test on t444e
Grate video
Thank you very much
We see you in hardeeville Sc
Great video. Keep it up!
Got a 07 lbz 600k zero blow by. And I have ran the piss out of it since the day it was delivered.
In the middle of a LBZ build now due to this, I bet the bad piston is on the drivers side too. hopefully it won't be like mine and need to be bored but it did seem like it ran alot from the video.
Professor truckmaster in the house! Love the video at Ryan’s, great example of severe blow by. You’re going to know if you have a melted or cracked piston with 18:1 compression making it’s way into the crankcase!
Thanks 🙏
Great video! Thanks!
My heart literally sank when he said it was common in LMM's
Oh ya hole in the piston or cracked piston. Same happened to my lmm
I had blow by on my 2006 6.6l lbz turbo blew motor and everything just throwing new motor in stock block with new heads pistons cylinders injectors head studded engine bored out completely so i’m doing a wold fob 68mm 360 thrust bearings 10 blade wheel into 3” mbrp down pipe in 4” flo pro out to axel dump with 8” tip.
If you own a 7.3 Powerstroke: check the valve cover on the driver side of the engine for any hot air pulsing over it.
And what would that mean ?
I put new heads on and it had crazy blow by 10 months later no blow by at all.
I have a 09 LMM an that's exactly what happened to me. Was driving heard a loud pop and started rolling heavy smoke. It was a cracked piston
How hot was the tune?
@@DG-pk3fh 175 over stock
Hi
I bought a hyundai tucson 2008 from a friend yesterday and I knew it had an oil leak about a year ago from the rocker gasket and he assured me it was fixed before I bought it
I paid a deposit and drove 75 kilometers back home and the next morning their was oil all over my driveway.
I bought it to my mechanic the next day and he was 22 minutes away and he took the oil filler cap off when it was up to temperature and not only was it smoking bad from the oil filler but also the dip stick hole.
The friend if mine was dishonest but I did get my money back but he is convinced that by Changing a couple of oil seals it will be ok.
I drove it for a while the day after I purchased the car and the check engine light came on and it was running lumpy and I got it home and I could smell the fumes in the cab.
Anyway it was a lesson learned and I honestly never knew that this way an issue was diesel engines before this.
Looks like my turbo core behind Ryan haha
👍
Great video dude👍👌
Thanks
We have LML & LP5 Denali’s currently (plus a few gassers) for the farm , guess I won’t leave out the power stroke... Watching this new build has me wanting to grab a ZF6 maybe a LML engine and convert into a 87 R30/C30 4 door. It would be a very long process not to mention $. The dream/ goal I would go for would be to have some new age on drive terrain, also some interior. Also having the older generation theme as well. Probably ain’t even possible, who knows... Anyways thanks for always keeping me and the rest of us motivated and determined to go for the things we are shooting for while teaching us at the same time! #TruckMaster
Thanks for the awesome feedback and good luck
You should make a break down video of all interior components seat,electrical,dash,center counsel carpet,headliner. Asking for a friend😉
Great idea
Theres hardly any content of that on you tube atleast not a truck master in depth one.👍
Alot of your subscribers do stuff to their trucks so wouldn't it be awesome to have a swap meet at the the truck show at Ryan's diesel this year!
Not a bad idea
Is it possible that valves out of adjustment can cause this as well?
Is it best to do a blow by test when warm or cold. Was that blow by test on the d max done when cold?
I've got allot of blow by coming from the bottom front of my Duramax LB7. I took it to a local deisel shop and they suggested routing it into my exhaust and continue driving it. I want it fixed and can you help me get that done?
Cold Air absolutely works if your grabbing cold outside air.
Lol plug your pcv hose and try the cap test
What if you hold your hand over the oil cap and you can feel the air puffing but you don't see it? My 1.9L ALH I feel but don't see smoke
Blowby is blowby. It’s the same on a diesel as any other engine. Every single engine has some degree of it.
True...only Japanese engines have the lowest due to their engine components precision production.
Lot of people talking about blowby in their Chanel's but no one showing what exactly looks like, I really like the video but I'm wondering if I can check a semi truck for blowby like that or if there is any other way to check it out. Thanks
It’s blow by fixable ??? because mine is exactly like this just no oil splashing out but it’s ruining good
Whats this 1/2 hose that hangs from the passenger side fender.? I throws a little bit of vapors?
New to diesel's my 6.6 lb7 has very little blow by and I was wondering if blow by could come from under the engine some have told me it's the Crankcase pressure outlet it's just annoying to see the haze coming from underneath if you could help I'll greatly appreciate it
my truck keeps burning up my glow plugs.could that be a symptom of blowby.in the morning its hard to start.
The LBZ and LMMs have garbage pistons, aside from cracking... they also have a bushing that’s pressed in to where the wristpin rides on, and when they walk out they drag on the cylinders... LB7/LLY pistons do not have this bushing. This also needs to be talked about, this was a huge overlook in this blow by video that was not mentioned.
My bad I will try better next time 🤷♂️
Truck Master sorry for my rude comment. I sound like an A$$ my bad.
Truck Master 😭
Thank u
ANY THOUGHTS ON HOW MANY MILES BEFORE A DURAMAX WILL START TO DEVELOP ISSUES???? I'M LOOKING AT A 08 MODEL
Would you still look for blow by in an NA gas engine?
you did great video
Thanks
I remember being in the cracked piston club lol #lbzproblems
What if I put a ccv reroute
How risky is it to buy an auction diesel? Probably pretty risky. Been trying to find a diesel step van and gov auction sites often sell old USPS vans and some don't have keys so then you don't know if it runs or what.
I know what that cracked piston life is like.
Hi i have a 6,2 diesel from 1982 G20 , i have a little bit of blow by , but not a the point to make jump the pop , blow by who dissapear when i accelerate .. is it very bad ????
Do you think this could happen with just a bad head gasket?
Wow now that’s some blow bye
My lly and lbz have zero blow by as well as my old lb7 all above 300k all of my buddies dmaxs also have no blow by my old 7.3 and 2 6.0s had a decent amount of blow by at 150-200k and 2 of my other buddy’s cummins had blow by. All preety good running trucks it seems like dmaxs don’t have blow by at all until something’s seriously wrong but pstrokes and cummins have it more times than not but it’s “normal”
International designed the pistons and rings to use crank pressure and blowby to keep the pistons from polishing the cylinder bore
Its a patented design
Could be injector cup failure
Got a 97 f250 with the7.3. My ccv has very little blow by pressure.. but it steams like a steam engine.. any ideas?
You mean it’s not good when your oil cap shoots to the moon ? Weird
Not exactly. I've seen blow by be caused by injector washer being blown, and crank case filters being stopped up.
I have a obs 7.3 and it does not blow or move the oil cap off when I check but there is a good amount of steam . Even out the crankcase looks like a train lol it that something I should be worried about has 230k miles
Stream is prefectly normal, pressure not so much. I would say nothing to be worried about
So if there’s a bitta air coming out and my cap can sit there is that fine?
Yes but if it’s excessive it’s bad
I know you explained what blow by is but how is it actually caused? I assume just excessive power from aftermarket mods and also being really hard on the truck?
I appreciate your videos! Looking to step into diesel truck life. Hoping to buy an 06 lbz crew cab long bed. It has 210,000 on it 1 owner bone stock. What should be the number 1 thing to be considered when buying a truck with that age and miles. Any help would be greatly appreciated.
Im relatively new to diesels but i think that if you are going to spend good money to buy a diesel and dont know all about diesel engines spend the bit extra getting a diesel professional to check it over because if you buy a bad one its painful. I know its 5months late but hope it helps. 👍
It's the same as Gasoline engine Blowby.
Hey man so i chexked this duramax out i could see fumes coming out but the oil cap wouldnt move? Is their some I should be concern?
Your good
Thanks for getting back at me!
was he using a tune when it happened? Is it stock?
I’m sure he was
What is a good 2 or 3 inch lift ? My 05 Duramax is all stock .going with 18s fuel rims
I’d probably go 3
With which brand name .
How many miles on the engine?
I’m actually not to sure
What if I had a injector leaching on my lb7 witch leaks inside the head and i fixed it and had blow now it’s blown up? 😂 hmmmmmmmmmm I work on lb7 lly lmm lml l5p scan tool does not fix all problems try a lb7 bottom end with lbz top end with duel fuel and tell me there is no blow by but still do a 1200hp
👍
*DURAMAX* is still the BEST diesel and way easier to work on.
Your funny
Different strokes for different folks. Being an LBZ owner Its just bc I'm familiar with the GMT800 platform and they're plenty of power STOCK. Tuning/abusive driving habits kills 2 of 3 diesels in my experiences.
unless your a 7.3 idi NON TURBO then you will have blow by from new, ive seen so many 7.3 idi's in my lifetime and never seen any without any blow by even ones that were built for power
a happy wife if married is a happy life.
Melanie is a great wife for you.
Yea not a common issue. Rarely do I ever seen this happen to a duramax
Have you checked out Gale Banks channel. He’s got some great stuff on there about the Duramax.
I watch his stuff every once in a while 👍
@@TruckMaster Gale is a lifetime + of knowledge, data junkie as anyone could be. He cracks me up with...."Let's bang that turkey!" Lol
He's giving a boatload of good ideas on that LP5 action, very informative and interesting.
Anyway, I'd like to see a dyno with a stock airbox setup then directly after that run, duplicate it with the HSP cold air box.
Use your truck or maybe the wifemax right after it's done.....wifemax makes more sense though as you'd kill 2 birds with 1 stone on that truck. If you know what I mean. You'll see if you hit your estimated #'s at the same time. 2 in 1.
The guys in Wisconsin are hot!! 🙂
I hate when things go through the rough
In my country blow by is called "NGOBOS"
Does the motor have to be hot to do this?
👌👍🏻
1:05
👍🏻👍🏻👍🏻😮😮😮😲
Oh no he said LBZ! 🤦🏻
LBZ is still one of the best
Truck Master yeah I agree brother
Truck Master yeah I agree brother
I’m here to early
2nd comment
😂
First like also
First nine
First
Every 6.0 diesel has blow by even new sloppy pos engines
New vs old stop scarring people
12 comment