NHTSA opens preliminary probe into more than 870,000 GM vehicles

[Doubeleive]

Where did I say that lol? My brother in Christ, go back and read my OP. Not trying to argue here.

neither am I but your post made it seem like they can't be found there..... he already said there's no warranty and the work around is to refine the engine

 

[DontTaseMeBro]

neither am I but your post made it seem like they can't be found there..... he already said there's no warranty and the work around is to refine the engine

Oh heck no man. It's Russia after all. Those guys can get anything. Ask me how I know haha.

BTW, I knew that Vlad had imported his Yukon via unofficial means a while back(he has a pretty active thread in the Exterior forum). I was merely asking him what data he had regarding engine failures in Russia since none of that is tracked in GM due the affected vehicles not being officially exported to there. That's it.

 

[RG23RST]

I believe the other engines are having some similar issues, not as many as the 6.2l. Unclear what the percentage of the 6.2l is compared to the 6.6l and 5.3l. I would say the failures before 7500 miles are not going to be solved with more frequent oil changes, but I expect the problems that are happening between 20,000 and 35,000 miles may be avoided by more frequent oil changes.

I see zero and I mean zero reports on Techline of bearing issues with the L84 or L8T. A few reports of internal oil pump failure that did not require engine replacement but that's it.

 

[jfoj]

I mean that after the engine is repaired, the oil viscosity does not change. They also remain at a viscosity of 0w20. As for the breakdown after replacing the engine. There is an important nuance here, and the United States does not repair the engine, in the United States you change it to a new one. And the new engine is just as problematic in terms of clearances as the previous one, broken. In Russia, there were L87s on the escalade. But unofficially, we have a lot of Yukons, like mine with the L87 engine, a Tahoe with the same engine and an escalade, there are also Sieros... So yes, we bring these cars from the USA without any problems, and we are happy to drive them))) so about replacing the engine as in the USA. The service in which I service my Yukon brought a new engine several times, and put it in the car right out of the box, and it broke down again, after 1000 km. Now they disassemble the new engine from the box, increase the clearances, then assemble and put it on the car, such engines have already traveled more than 100 thousand km after repair

Interesting info about increasing the clearances. There is something going on. What I am wondering about is the engines that make it to 20000-30000 then fail but have no issues before 5000 miles.

I still would not run 0W20 either way. Not sure your weather and traffic conditions where you live. We can have 20F (-7C) to 100F (38C) and have aweful traffic conditions where in 100F (38C) it takes 45 minutes to drive 10 miles (16kM). The crazy hot temps and heat soak after crawling in traffic and idling is not easy on the engine oil.

I assume you probably have much colder Winter temps, not sure where you Summer temps tend to top out at.

 

[jfoj]

I see zero and I mean zero reports on Techline of bearing issues with the L84 or L8T. A few reports of internal oil pump failure that did not require engine replacement but that's it.

Search the web, you will find failures.

 

[WalleyeMikeIII]

Anybody seen data on if the failing engines are coming out of a specific engine plant, or all of them?

 

[jfoj]

Everyting seems to be too random at this point. Not sure many of the people posting in forums, on Reddit, or social media know enough to determine what plant and build dates were affected. Hell, I am not 100% sure I can figure out what plant the engine came from, but I am sure I can figure it out.

From a quick search and I am not sure this is all current and 100% correct:
Tonawanda, NY
Spring Hill, TN
St. Catharines, Ontario
Silao, Mexico

Again, not sure this is all correct and current and that they build the L87.

The build date on my 2024 was 8/2024 so it is about as late in the 2024 MY it could have been built, so hopefully I will not suffer an early failure. The problem is about 80% of my driving is 2-6 hour highway and it would sux to have a failure and be stranded. From the time I purchased my truck with 8 miles at the dealer, I had to drive just over 1 hour (66) miles with at least 60 of the miles on the highway. Not sure if this would have been helpful or not for reducing the chance of engine failure?

I think GM clearly had an idea of what VIN's may have been impacted when they released a Technical Bulletin regarding the 2022-2023 models, but they did not release the VIN's to the public. But they may have only had a partial idea of what was going on with the 6.2l's.

 

[Vladimir2306]

Interesting info about increasing the clearances. There is something going on. What I am wondering about is the engines that make it to 20000-30000 then fail but have no issues before 5000 miles.

I still would not run 0W20 either way. Not sure your weather and traffic conditions where you live. We can have 20F (-7C) to 100F (38C) and have aweful traffic conditions where in 100F (38C) it takes 45 minutes to drive 10 miles (16kM). The crazy hot temps and heat soak after crawling in traffic and idling is not easy on the engine oil.

I assume you probably have much colder Winter temps, not sure where you Summer temps tend to top out at.

The service guys say that if the engine fails before the first oil change, it will be up to about 10 thousand km, or 6 thousand miles. These are most likely temperature gaps. On longer runs, the reason is the missing oil level. Unfortunately, our oil pressure sensor responds very late. It’s catastrophically late, and if you saw it on the dashboard, then most likely engine repair is already inevitable.
When changing oil, we always cut oil filters and examine them for the presence of metal shavings. This is also a form of diagnosis. If there are chips, then open the engine.
As for the conditions, they are closer to the conditions of Canada, we have -40C in winter and +40C in summer, our driving conditions are good, in a metropolis like Moscow, the average speed is about 30-35 km/h, which is about 20 miles per hour. And the presence of high-speed highways allows you to cover the distance between cities of 700 km in 4.5-5 hours.

I will mention another important point regarding the oil level, we discussed this in this forum. The GM manual indicates an oil volume of 8 quarts, which is equal to 7.6 liters, but in fact, if you add 8 quarts when changing the oil, the oil level will be at the middle level on the dipstick. To get the Max level on the dipstick, you need to add almost 1 more quart, or 0.7 liters. In Russia, when changing engine oil, we pour approximately 8.2-8.3 liters of engine oil to the Max level.
This means that we have a better chance of preventing the engine from starving of oil. So yeah, since we don't have GM's support, we have to get out and monitor the car more closely. For example, I check the oil level once a week, or every 1000 km. Even if I’m on a long trip, involving a mileage of more than 1000 km, I stop at a gas station and while I drink coffee I allow the oil to drain into the crankcase, and check the oil level.

 

[Vladimir2306]

Oh heck no man. It's Russia after all. Those guys can get anything. Ask me how I know haha.

BTW, I knew that Vlad had imported his Yukon via unofficial means a while back(he has a pretty active thread in the Exterior forum). I was merely asking him what data he had regarding engine failures in Russia since none of that is tracked in GM due the affected vehicles not being officially exported to there. That's it.

As I understand it, you’re talking about remaking the standard Yukon headlights? yes, there are some interesting threads of mine there))
We have a small circle of fans of the brand, plus we communicate personally with GM services, there are not many of them. Since services welcome any sources of information, this is a closed chat where service owners and representatives communicate. So, it was their information that I conveyed.
There are three possible reasons: the oil pump, defective connecting rod bearings, and insufficient temperature clearance. As I said above, version 3 is closer to me. But just like with the oil consumption, which I partially corrected on my Yukon, I suspect there could be more than 1 reason.

 

[Vladimir2306]

Everyting seems to be too random at this point. Not sure many of the people posting in forums, on Reddit, or social media know enough to determine what plant and build dates were affected. Hell, I am not 100% sure I can figure out what plant the engine came from, but I am sure I can figure it out.

From a quick search and I am not sure this is all current and 100% correct:
Tonawanda, NY
Spring Hill, TN
St. Catharines, Ontario
Silao, Mexico

Again, not sure this is all correct and current and that they build the L87.

The build date on my 2024 was 8/2024 so it is about as late in the 2024 MY it could have been built, so hopefully I will not suffer an early failure. The problem is about 80% of my driving is 2-6 hour highway and it would sux to have a failure and be stranded. From the time I purchased my truck with 8 miles at the dealer, I had to drive just over 1 hour (66) miles with at least 60 of the miles on the highway. Not sure if this would have been helpful or not for reducing the chance of engine failure?

I think GM clearly had an idea of what VIN's may have been impacted when they released a Technical Bulletin regarding the 2022-2023 models, but they did not release the VIN's to the public. But they may have only had a partial idea of what was going on with the 6.2l's.

By the way, about driving on the highway. There is one hypothesis. We have cars that do a lot of highway driving at high speeds, myself included. I drive fast, which is about 120-140 kmh (80-90 mph) average speed over 700-900 km (500-600 miles). This is driving at a speed of 170-180 kmh (110 mph) on cruise control for 4-5-6 hours.
So, with such movement, there is practically no gasoline left in the oil, it quickly evaporates, and when driving in the city at a slow speed at low speeds, it leads to the fact that gasoline in large quantities dilutes the engine oil, making it even more liquid, and even more losing lubricating properties. So the hypothesis is that highway driving is better for our engines than city driving.