3.0L Diesel “Money Code” P0016… Repair Goes Wrong
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- เผยแพร่เมื่อ 14 มิ.ย. 2024
- Customer states check engine lamp. Diagnoses reveals P0016 Camshaft Crankshaft correlation… and that can really only mean one thing…. The engine needs internal repair. A good opportunity for the apprentice to do some learning.
After the labor intensive repairs are complete, there is a problem immediately after the engine is started. - ยานยนต์และพาหนะ
Great video! I did want to chime in that it’s a better practice to replace the sprockets. Even though the sprockets look “good” there is wear on them nonetheless from the stretched out chain. Using old sprockets will only wear out the new chain faster.
Also, has GM updated the part in anyway? I remember the 3.6L had chain issues. You’d think they would learn by now
I don't know of any updated parts thus far. The early 3.6L engines had timing chain wear issues, but I've really only seen that when soccer mom/dad drives it low on oil and has minimum oil changes. The new 3.6L engines are much better and seem to be solid with good low end torque. I owned one for a while and it was great.
Also I did request new gears, but the parts were not available within a reasonable time. I'd prefer to replace them, but you can't replace the crankshaft gear either so I figured it would be ok to re-use the cam gears if they didn't show signs of wear.
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oh man! back in my younger days if that would have happened to me tools would have been flying! But you handled it well!
Been there, done that. Never gained much from getting upset.
I've learned the fastest way to get out of a hole and get back to making money is to just bite right into that turd sandwich and start chewing.
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Ah yes, the good old return lines.
The German opels got also the same infamous connections on thier 1.6 liter B16DXX. With the same freaking chain problem… thank you GM Powertrain Turin!
Another award winning design.
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Did you have losen the turbo to get the valve cover off?
Nope. I fashioned a home made tool from an 8mm socket and an allen wrench that I cut down and bent.
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Was this covered or did the customer pay? How many hours does this pay under warranty?
I don't recall. As far as I remember, warranty almost never pays enough.
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thanks for sharing another one of these poo16 repairs. i have to do mine and i will be pulling motor to do it. any tips or tricks you have learned are greatly appreciated. Looks like you aren’t pulling turbo and piping loose anymore? mine happened at 114000 GM will only prorate repair because i am over the 100000 warranty. the secondary timing chain on early 2020’s is the problem from what I researched. GM knows it and redesigned it, you will see little oiling holes in the new upper chain that are not in the stretched original one. Hopefully that fixes them for a reasonable amount of mileage. These should not be needing replacement at around 100000 miles GM should recall these engines and fix.
I fabbed up a home made tool from an 8mm socket and an allen wrench that I cut down and bent to get around the turbo coolant pipe bolts.
I can't think of any tips in particular other than to take your time with every step and double check everything before reassembly. Group and label all of your fasteners step by step and take a lot of pictures.
If this is something you've never attempted before it can be a very overwhelming task.
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I am back to ask a question not sure how else to reach out to you. I am in the middle of changing timing chain now and I noticed that the copper links don’t line up as you are supposed to set them up when you replace timing chain. Did you check that initially before removing timing chains and find that also? I am a little concerned about that. I still need to pull upper cover working on that next. Also no matter where I pin crank the copper links don’t line up in any of the 2 locations you can see. Arrow on fuel pump never aligns with any copper link. thanks for the info it has really helped.
The copper links are for installation only. After the timing tools are removed and the crankshaft is turned or the engine has been run they won’t line up again.
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Can anyone tell me the benefits of a dohc setup for a low reving diesel? Why couldn't they use a pushrod setup with a cam in block gear driven? Even if it was chain driven, it would be so much simpler and reliable then this setup. Perhaps it's for nvh.
Well the disadvantage of a cam in block design is that the intake and exhaust valves both share the same camshaft so even if you do have a variable valve timing system you're forced to adjust the timing of both the intake and exhaust at the same time.
With a DOHC engine you can adjust the timing the intake and exhaust valves independently of each other which can allow the engine to breathe better under a lot of different conditions at both low and high RPM and loads. Also you can eliminate an EGR system by playing with the valve overlap and achieve the same EGR effect....as well as virtually change the displacement of the engine on the fly which can drastically increase fuel economy.
Also this diesel engine seems to happily run all the way up to 5000 RPM and it seems to have good torque from low to high.
Disadvantage of a SOHC or DOHC design VS a cam in block would be that the engine must be taller and wider to accommodate the valvetrain.
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@DadsGarageDiagnosticSpecialist That's true for a gasoline engine but this diesel does not have VVT. I just don't see a benefit to this dohc layout in this application.
@4wdiesels I guess only the engineers who designed it know the answer to that.
Looks like a truck I will never buy
exactly here in australia I have holden colorado rg with 2.8 duramax with normal oil pump and timing belt my previous car was isuzu d max3.0 and never problems with timing chain after 200000km even expensive cars like bmw or mercedes lost their quality
They sure do run and pull good when they're running though... Too much expensive technology for me. I'll keep all my old stuff running for as long as possible.
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The 2.8L seems to be very solid. I have seen basically NO mechanical problems with them, and minimal emissions faults. Just don't forget to change the timing belt on time or that could ruin your day.
I have a question. I watch both of your videos on the timing chain replacement. I have a 2020 Gmc 3.0 140,000 mi, just replaced turbo def tank and ecm 6500 bucks. 2 months later broken motor mounts and a growling sound towards rear of engine not on and off sound sometimes louder then others no codes but I'm wondering if you would think it could be a place to start timing chain or have you ran across that sound. Thanks
The most pathetic aspect of all these truck repairs is having to be forced to remove the cab in order to make access easier. Lends a lot of credence to the theory that the manufacturers would love for you to scrap it and buy a new one. The other thing I find ridiculous is the use of a wet belt inside where you also have a multitude of chains there anyhow. Insane!
I'm sure they used a belt to keep it quiet. The cost of repairs on modern vehicles these days far exceeds what many people can afford. They can't afford to buy the vehicle in the first place if they can't afford to drop thousands at a time for repairs.
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variable oil volume control strikes again.
I'm not sure about that. I was beginning to think it had something to do with 0W20 oil and extended oil change intervals.
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@@DadsGarageDiagnosticSpecialist the oil it uses is quite good and the capacity is more than sufficient for soot load. bobistheoilguy has some details about the diesel oil those engines use and the engine bearing designs for that type of oil.
More GM JUNK!!!!!!!!!!!!!!!!!!
Thanks for commenting.
Phoenix has some electrical issues right now that I replaced the tail lights because I had it on warranty and the driver side tail lightI replaced some fuses and that really mess things up my tail lights driver's side doesn't work my mirror turn signal doesn't workI think I could have a bad ground issue want could it be
engine with the timing on the back of the engine not even worth the time xD dirtymax xD
It's not a new idea. There are other engines that have the timing set in the back..... Ford SOHC V6 and VW comes to mind. Although the chain should last longer than the oil pump belt in my opinion.
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What chevrolet dealership does work at