Cracked PISTON or Failed INJECTOR?? Kodiak 5500
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- เผยแพร่เมื่อ 7 ก.พ. 2024
- I finally got the truck back after it blew up in West Arkansas!! But, I was lucky enough to tear the engine down over at Pure Diesel and go over what actually went wrong.
This could be quite the debate among diesel gear heads, Watch the whole video and leave your comment below. What do you think happened?
Have to agree with the mechanic. Piston cracked first and then the injector spray finished the job. Glad you guys got the rig fixed and can get back to doing what you love. Safe travels!
I was in the RV biz when GM introduced the Duramax engine? Early on they were having problems with cracked heads and pistons and they determined that is was because the owners were doing long haul and hard pulls, like mountain climbs, then shutting the motor off immediately after stopping which caused the engine to overheat, without the coolant flowing this caused a spike overheat, thus cracking things!
Never heard any issues with cracked pistons or heads with the LB7 or the LLY, not saying it didn't happen now and then, but nothing that was out of control. The LB7 had issues with the first run of Bosch injectors and would replace them under warranty. The LLY had more of an issue with the head gaskets going probably due to a bad turbo inlet causing EGTs to rise easier and lack of increasing the cooling system the the EGR cooler was added. In reality, any Duramax can pop a head gasket due to the difference in materials between the aluminum heads vs the iron blocks with different expansion rates. These early Duramax engines had some high compression. That with the boost makes for some high cylinder pressures. That's why they add piston squirters below each piston to help keep them cool.
That was a great video. Answered a lot of questions. I’m not sure which one I would say. Either the piston or the injector. But I’m glad it’s back up and running.
I am so glad to have it back!!
I'm so happy that you guys got the truck back finally! I gotta say, the quality of these videos has gotten better with each upload!
Thank you! It’s a fun game of continuous improvement. I really enjoy making the videos!
@@TaltonOffroadTravel the enjoyment shows in the editing for sure
I just love that tilt over front end I wish that they would make this a option to have a tilt front end on my Dodge 3500 4 door long bed dullay 4x4 5.9 cummins with 6 speed manual and shift lever for the 4x4 and I ordered it that way because the automatic trans has to be rebuilt after a 100K and I never owned a auto until I got married and she drove a Miata manual and a Honda Prelude manual and a a little Chevy with a manual and her first automatic was a Montcarlo SS with a auto and it had factory race v6 and a friend that runs a Chevy dealer and he told me to get rid of that car and when you get 80K to get rid of it because that race motor if something goes wrong with that motor that no body knows how to fix it the right way and it will never run the same ever. It was a very strong motor with a lot of horse power and would fry the tires off and after that she has had 2 Honda Accords which are great cars and she drives a Accurate TL AWD and the high out put motor with 305 hp and have not had a single problem oh I for got they put 2 new drive shafts in it because of vibrations but after the third one it’s all good now with 82K on it and the drive shafts were under warranty.
Piston cracked first seen it a lot!
When your mechanic was talking about the engine diagnostic, he was talking a foreign language to me because I know nothing about diesel engines what so ever. So it was very interesting listing? I’m glad you were able to get it back to your own mechanic whom you were very comfortable with. That was a great piece of mind considering all that you and your family been through since the Arkansas trip. Glad you’re back in business! If you don’t mind sharing? How much did the total repair cost?
I’m glad it was interesting even if you didn’t understand it all! I tried to keep it short and to the point lol.
It was $19k and some change for a new engine with a whole new fuel system, new radiator, fan and misc fluids with labor 🥴
I believe the injector causes that issue. The piston is designed and engineered the way it looks to have even combustion temperature across the the top with the injectors corresponding spray pattern. When the injector balance rate starts to get close to out of spec the fueling requirements for the affected cylinder will not be adequate across the entire rpm range of the engine on the affected cylinder and the temperature of the face of the piston will vary and you will produce hot and cold spots which usually lead to the crack.
Valid point. But if it were that far out to make a temp difference wouldn't that show symptoms before hand?
The balance rate im sure came out and with all the towing it finally gave up
glad you guys were safe and God took care of you. be blessed
I agree with that mechanic the injectors are good, the stock pistons aren't great for on those applications.
It makes sense to me. But then I'm like why did the piston crack? lol. But I did get it very hot, several times lol.
So did Pure Diesel just swap out a new/rebuilt motor for you? I was not sure since we got to see your old motor torn down, which was awesome to see. We dont always get the chance to see what really happened to the motor so that was a treat.
Yeah just a new long block with a whole new fuel system. They swapped all my stuff onto a reman Jasper engine and I went ahead and had them replaced all the injectors, high pressure lines and return lines.
@@TaltonOffroadTravel Fantastic! That build should give you peace of mind for a while. Did I miss it or did the guy give you any advice on preventative measure to keep this from happening again or is it just bad luck?
@@BrianAz hard to say really. Cracked pistons happen. Me getting the truck very hot a handful of times didn’t help things, but I believe I got that all sorted now lol.
Just take care of it and keep putting bullets in the ol' gun. Not every bullets the same. Y'all b safe❣️ I'm gonna guess the injector it obviously went through the piston.
I think the way it went right away with no warning the piston was cracked first, but we’ll never know! Lol
Well, I just saw your original video and was betting on a failed injector harness. It happened to me one morning at a campground. Minimal power, sounded horrible. Some smoke. Limp mode. New injector harness and done. But you were not as lucky.
Yeah that sure would have been a much better outcome! Lol
Would be awesome to see a cummins swap in that truck! What did it cost to fix the truck?
I agree, would love to put a Cummins in it one day. Either a deleted 6.7 or a 8.3
It was $20k to fix it 😩
Did you upgrade the pistons? I know the hi performance pistons are crazy expensive.
No, for warranty purposes I kept it all stock with a drop in replacement.
However knowing what I know now I certainly recommend upgraded pistons for anyone building a Duramax
@@TaltonOffroadTravel I understand thanks.
I was worried for a second. Have the same truck. Then I remembered..I sold my ford to buy it 😂🤣
Did you ever weigh everything you travel with on a truck scale?
Yeah a long time ago when we started lol
I have never seen cracked pistons not cause a cylinder to haze at a minimum if not flat out a ton of blowby but who knows
I didn't have any blow by, but I did have some haze going on for a couple months leading up to this. I chalked it up to high elevation while being in Colorado and didn't think much of it. I should have looked into it when I noticed the change. I noticed it when it dusk and I had headlights behind me
But how good wood the engine run with a crack in the piston the injector would need some time to put a hole in it???!!
Yeah the crack forms first. Then it takes a little while for the hole to get burnt thru. The crack likely wouldn’t be noticeable or cause any issues, maybe just a little blow by, if any. In my case I didn’t have any blow by. I got this motor over 240° a handful of times, plus when I first bought it I didn’t have an egt gauge and knowing what I know now I bet I was cooking that thing early on lugging it up a mountain 🥴
Crack piston then injector
Did you tell us what the new engine was - another Duramax or was it a Cummins?
It made the most financial sense to replace the Duramax. A custom swap like a Cummins would cost double at least.
I got a new Jasper long block with new S&S injectors, and all new fuel lines and stuff
Thanks- I did go back and read the video about engine@@TaltonOffroadTravel
I think the piston cracked first which cause the injector putting a hole in the motor
Agreed
Now back to road tripping.
Won't be much longer, Lord willing!
She looked better as a brunette. 😊😊
Been many years since she was a brunette lol. I don’t think she knows what here real hair color is anymore 🤣
1. Stop pulling and hauling that much weight long distance…..
2. If you have to do it, don’t drive fast and stay off mountain and hilly terrain….
3. Don’t drive long distance, pull in and stop then shut motor off, let idle for a hot minute
4. Keep coolant and oil changed regularly
5. Add HOWES de icer to your fuel every 2 fill ups …. Great for winter but also summer keeping injectors lunricated and clean …. I bought an 08 f250 6.4 with 100 miles in 08, traded in 2017 with 425,000 miles…. Never had any mechanical issues. Stuff works man. HOWES very underrated…… be a good sponsor to pick up
I typically don't travel more than 5 hours in a day. I do run an additive, and change the oil regularly. I had overheating issues at one time and I'm sure that didn't help. This thing has been all around the country with this load, it was simply an unfortunate mechanical failure.
Now I'm heading back out on the road again!
@6:36
LOL, yep we gotta make that money!!!
What do you do for a living?
Must be something online since yall travel so much eh?
Defective piston, another manufacturing flaw!!