Jump to content

Well crap... catastrophic engine failure?

Rob Mugs
 Share

Recommended Posts

GMC207 Enthusiast

GMC207

Posted
Posted

Oh man. Don’t I hate knowing I bought something this expensive with an issue like this. Thanks for the info though.

  • Like 1
  • Replies 60
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

Rob Mugs
Rob Mugs

Welp, they have been nothing but helpful.  If you're in the area (NE Illinois) Ray Chevy.. kudos!   Getting a new engine and they're supplying me with another Silverado until it's done

redwngr
redwngr

Cut and past from the GM notice posted elsewhere:   Some 2020 Silverado, Sierra; 2020-2021 Camaro; 2021 Corvette, Tahoe, Suburban, Yukon, and Escalade models equipped with the 5.3L engine (R

Rob Mugs
Rob Mugs

I don't toss around 50-60k dollars like some.  It's pretty sad to spend this kind of money and be out for ANY length of time.   That said, it's 2020 and all ****ery is possible.

Posted Images

redwngr Senior Enthusiast

redwngr

Posted
Posted

Cut and past from the GM notice posted elsewhere:

 

Some 2020 Silverado, Sierra; 2020-2021 Camaro; 2021 Corvette, Tahoe, Suburban, Yukon, and Escalade models equipped with the 5.3L engine (RPOs L82, L84), 6.2L engine (RPOs L87, LT1, LT4, LT2), or 6.6L engine (RPO L8T) may have a misfire and engine noise condition. The Check Engine MIL also may be illuminated along with several possible DTCs, including DTCs P0300, P0106, P0506, P3189, P318A, P318B, P318C, P318D, P318E, P318F, and P3190. These conditions may be due to a broken valve spring.

If it’s determined during an inspection that the engine has a broken valve spring, a cylinder leakage test on the affected cylinder must be performed.

 

5.3L and 6.6L Engines

On 5.3L and 6.6L engines (RPOs L82, L84 and L8T) built from June 1, 2020 to October 7, 2020, if cylinder leakage is not observed, replace only the affected valve spring. (Fig. 13)

 

6.2L Engines

On 6.2L engines (RPOs L87, LT1, LT4 and LT2) built from June 1, 2020 to October 7, 2020, if cylinder leakage is not observed, replace all valve springs on both cylinder banks.

  • Like 1
  • Thanks 1
  • 2 months later...
SILVER SLED Senior Enthusiast

SILVER SLED

Posted
Posted
16 hours ago, awesome barney said:

Anyone with that build date with a 6.2 make it past 5000 miles?

Just at 7,000.   And it's been broken in rough.  A few trips down the 1/4 mile and some other "spirited" driving.  

  • 2 weeks later...
RadBrad Enthusiast

RadBrad

Posted
Posted

4000 miles here, 8/20 build, no issues with the engine yet, leaky rear window is an entire other story...

 

as a side note....It does seem like the lifters in these new dynamic fuel management V-8s are failing early in life cycles..

RadBrad Enthusiast

RadBrad

Posted
Posted

4000 miles here, 8/20 build, no issues with the engine yet, leaky rear window is an entire other story...

 

as a side note....It does seem like the lifters in these new dynamic fuel management V-8s are failing early in life cycles..

CLandry Enthusiast

CLandry

Posted
Posted
49 minutes ago, RadBrad said:

4000 miles here, 8/20 build, no issues with the engine yet, leaky rear window is an entire other story...

 

as a side note....It does seem like the lifters in these new dynamic fuel management V-8s are failing early in life cycles..

New dmf victim checking in 8500 mile failure

Guy walked in service department at the same time with 21 at4 suv whose pushrod was bent to all hell, dealer in Florida changed it and lifter job but app sent him alerts a week later so he pulled up to our dealer to show documents and codes,

 

 

didn’t sign up for this kinda failure, in 3rd year of a platform 

 

RadBrad Enthusiast

RadBrad

Posted
Posted
4 minutes ago, CLandry said:

New dmf victim checking in 8500 mile failure

Guy walked in service department at the same time with 21 at4 suv whose pushrod was bent to all hell, dealer in Florida changed it and lifter job but app sent him alerts a week later so he pulled up to our dealer to show documents and codes,

 

 

didn’t sign up for this kinda failure, in 3rd year of a platform 

 

Oh man, that's not good, I've heard of a couple guys here where I live too that have had issues with the lifters.  I was really hoping the older AFM lifter issues might have been resolved with this new DFM, but obviously not.  Its crazy this fuel management stuff has been around since like 2010 or something like that....you would think in a decade things can be improved to work without failure, especially early failure.  Your right, it really isn't acceptable.    

  • 4 weeks later...
Snow135 New Member

Snow135

Posted
Posted (edited)
On 12/19/2020 at 11:46 PM, Rob Mugs said:

I just had the exact same thing happen yesterday on my 2021 Sierra Denali with only 3800 miles on it... So pissed!!
 

 

Agreed.. it's not his problem.  He didn't design, engineer, or build the truck.  He just sold something he thought would be working.

 

@SILVER SLED, she barely can maintain idle.  CEL is on but OnStar says no issues.  I wasn't on it either;  I was at 50 mph and cruising when I felt what seemed like a flat tire at first.  Over a period of ~15 to 30 seconds it went from that to sounding like a lifter tick to a full-on bang sound.

 

Been a GM guy for 20+ years..... had two Fords with no issues.  This isn't leaving a good taste in my mouth

 

Edited by Snow135
  • 2 weeks later...
20L8TSierra24 Senior Enthusiast

20L8TSierra24

Posted
Posted
On 12/19/2020 at 10:40 PM, JimCost2014 said:

And at this point, the truck is owned by the bank (or the OP) , not the dealership, salesperson, or GM.

The dealer can call the bank and "swap collateral " if thats the route they go. I'd rather get a new engine that has been updated rather than another truck on the lot that may do the same thing. 

 

GM needs to get this under wraps pretty quickly...

20L8TSierra24 Senior Enthusiast

20L8TSierra24

Posted
Posted (edited)
On 12/19/2020 at 10:40 PM, JimCost2014 said:

And at this point, the truck is owned by the bank (or the OP) , not the dealership, salesperson, or GM.

The dealer can call the bank and "swap collateral " if thats the route they go. I'd rather get a new engine that has been updated rather than another truck on the lot that may do the same thing. 

 

GM needs to get this under wraps pretty quickly... Here's a brand new 21 Yukon with an engine knock fresh off the hauler 3 weeks ago.

 

 

Resized_20210505_090523.jpeg

Edited by 20Denali21
BIGDOGx Senior Enthusiast

BIGDOGx

Posted
Posted
On 4/23/2021 at 1:04 AM, CLandry said:

New dmf victim checking in 8500 mile failure

Guy walked in service department at the same time with 21 at4 suv whose pushrod was bent to all hell, dealer in Florida changed it and lifter job but app sent him alerts a week later so he pulled up to our dealer to show documents and codes,

 

 

didn’t sign up for this kinda failure, in 3rd year of a platform 

 

 

Actually it is far worse than that as this has been an ongoing issue since they released the newer DI engines back at the start of the 14 model year, yes this has been an issue for 8 years now. Seems it has just been allowed to continue, you would think a part supplier or design change would of been implemented in the last 8 years but here we are!

Rob Mugs Enthusiast

Rob Mugs

Posted
  • Author
Posted
On 5/26/2021 at 10:55 AM, BIGDOGx said:

 

Actually it is far worse than that as this has been an ongoing issue since they released the newer DI engines back at the start of the 14 model year, yes this has been an issue for 8 years now. Seems it has just been allowed to continue, you would think a part supplier or design change would of been implemented in the last 8 years but here we are!

Just to be clear, my case was NOT a pushrod issue.  It was a broken valve spring that grenaded the motor

BIGDOGx Senior Enthusiast

BIGDOGx

Posted
Posted
On 5/27/2021 at 10:48 PM, Rob Mugs said:

Just to be clear, my case was NOT a pushrod issue.  It was a broken valve spring that grenaded the motor

Yes and like i said it has been an ongoing problem for 8 years now. Collapsed Lifters which lead to bent pushrods and valve springs breaking are all 6.2 issues that have been happening since the 14 model change.

Gangly Senior Enthusiast

Gangly

Posted
Posted (edited)
26 minutes ago, BIGDOGx said:

Yes and like i said it has been an ongoing problem for 8 years now. Collapsed Lifters which lead to bent pushrods and valve springs breaking are all 6.2 issues that have been happening since the 14 model change.

The valve spring issue in the 6.2's is a completely separate issue from the lifter issue and is a much more recent event. 

 

A collapsed lifter, happening for a while now on GM's engines, will short stroke a rocker arm creating less stress on a valve spring, not more.

Edited by Gangly

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • jgaudet99
      Tire psi

      By jgaudet99 · Posted

      Yes that's right, it's the upgrade that includes the overload spring and all that stuff.   Someday when I'm empty and going by a scale I'm going to stop in and get some weight readings.   Exactly  you should have the ability to change individual settings, in in Canada so I'm driving with kph but then I'm stuck with kpa when I want psi lol    
    • Chuck FB
      Tire psi

      By Chuck FB · Posted

      You must have that upgraded gvw package which is only available or at least was in 2025 with the diesel engine for the 3/4 ton and that gave the truck physically the larger 12.0 ring gear rear diff and the 3500 rear spring pack. There is a difference in what the diff housing looks like externally as one tell tale and also your truck should have the upper overload spring pack and the frame pads that the pack goes up against.    The pressure the tpms system kicks the alarm in on a stock setting truck, that is a good question and was just from what I recall but I doubt I made any notes on it as I knew for the rear that it was not at all what I was after regardless either. Being that you have a diesel and if running on stock tires the minimum pressure on an empty truck seems to be around 50 psi from hearing of those that have weighted the front axle but the rear axle is very similar in weight to a gas truck and again a near empty truck on the rear could go down to 35 pounds at minimum. However the weigh scale is the proper way to know for sure as a guide.    As to changing the readings on the dash from metric to the US measuring system, oh yes that is done easily but what I was attempting to explain was that I can't pick and choose items I want to have in US and those I still want in the metric system at the same time as its either all or none. For example lets say you drove into Canada and switched your dash over to metric so your speedometer read in km an hour, well then your reading kilopascals on your tpms readout and your wife looks over and says what the hell is that saying in the tpms screen and you say "darned if I know, I think its Chinese" !
    • Chuck FB
      Some Assembly is Required

      By Chuck FB · Posted

      This is partly why I decided to have switched over to Amsoil SS as a way of hopefully preventing the buildup of the sludge/carbon on the pistons and clogging of the oil control rings and the carbon that would cause the compression rings to stick in their grooves as well as stay cleaner up top of the heads in the valve train in the first place, an oil that has tested better by third party testing over typical shelf oil and also doing my best to run relatively short OCI. However in saying that I don't think there is any way to easily prove the oil I was using prior allowed for a buildup at the OCI I was doing, nor in the other direction to make claims the Amsoil is keeping everything clean either. There really isn't a window into the engine is there to know anything for certain even if oil samples were taken for example that showed still healthy oil being dropped out of the oil pan other than engine tear downs that extensive and expensive testing of oils does to actually visually see what is really going on inside the engine. I wish there was some easy method of seeing what is going on but I don't happen to be aware of that if there is.  
    • jgaudet99
      Tire psi

      By jgaudet99 · Posted

      My truck is a ¾ ton but my placard also says 80 for the rear tires, I think I might have the upgraded suspension to the 3500 series maybe.   I put my air down to 60 and the light was still on, and there was no way I was putting over 60 psi in the rear empty and not towing because I knew the actual number Toyo gave me and I didn't wanna ruin the center of my tires!   And you actually can change it in the settings from metric or is and it will show kph or mph then when you go into your tire settings it will be either psi or kpa, but it would be nice to just change it directly on the tire psi page 
    • Grumpy Bear
      Some Assembly is Required

      By Grumpy Bear · Posted

      Common Sense Assembly   Your driveline is forgiving of the occasional mistake. It will even often forgive the random serious blunder. But it will not forgive a continuous bad habit.      What? Not everything needs to be a five thousand word essay.       

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...