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

[jfoj]

Changing the oil more often or to a different viscosity won't help you. The issue is with the bearings in the bottom end of the motor. Again, same design oiling system exists in the 5.3 and 6.6 and neither have this issue.

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.

 

[jfoj]

GM's Broken 6.2L V8s Are Stranding Owners for Weeks as Replacement Engine Pipeline Dries Up

The situation has left dealers struggling to source new engines and owners with no clear repair timelines, and it's especially dire for people who need their trucks for work.

www.thedrive.com

 

[DontTaseMeBro]

GM's Broken 6.2L V8s Are Stranding Owners for Weeks as Replacement Engine Pipeline Dries Up

The situation has left dealers struggling to source new engines and owners with no clear repair timelines, and it's especially dire for people who need their trucks for work.

www.thedrive.com

This is starting to pick up steam in the news. Also seeing a lot of videos popping up all over YouTube covering this announcement.

 

[Vladimir2306]

In Russia, unfortunately, the GM warranty does not apply, so engine repairs are done at the expense of the owners. So far, there is an opinion in the services that the cause of breakdowns at low mileage is a violation of clearances. The piston does not move freely in the cylinder. Even having bought a new engine and disassembling it, we measured the gaps, they were lower than those required by the specification. This causes disruption of the crankshaft and destruction of the connecting rod bearings.
Therefore, in Russia, when buying a new engine, servicemen disassemble it and sharpen the hone, increasing the gaps. and then the engine runs without problems.

 

[jfoj]

Vladimir,

Interesting info.

Are you stating that the Pistons are too tight and/or the Piston Ring End Clearance is too tight?

What are they finding about bearing clearances?

Info might be useful to understand failures.

 

[Vladimir2306]

Vladimir,

Interesting info.

Are you stating that the Pistons are too tight and/or the Piston Ring End Clearance is too tight?

What are they finding about bearing clearances?

Info might be useful to understand failures.

Our services are divided in opinion, one service believes that the fault of engine breakdowns is the connecting rod liners, another service believes that the smart oil pump is to blame. But the third opinion is closer to me, it is that the clearances in the engine are too small, this just breaks the engine from the inside. Here is a video of the new engine and how the cold piston moves in it, and what will happen when it warms up? And I post photos of engine measurements 6.2 with a mileage of 3000 km. They are in Russian, but with a smart camera and translator it is not difficult to understand what is there))

Видео

 

[B-train]

You can log all you want if do your own oil changes your going to need a recipe also to prove your oil changes and the recipe will show what type of weight oil you purchased.

I think people are overthinking the oil thing here. When mine was under warranty andni got the 2 free changes, I just told them I wanted 5w-30 instead of 0w-20 and they didn't bat an eye at it. If you're doing you own, just run what you want. IF they ever say anything, tell them to look at their service literature for the 6.6L gas motor - nearly identical architecture (minus CAFE garbage) that have 5w-30 on the fill cap.

I've been running a LT 6.2L for 125k on 5w-30 without any problems.......granted it's one of the good ones - 2017. LOL

 

[Vladimir2306]

I think people are overthinking the oil thing here. When mine was under warranty andni got the 2 free changes, I just told them I wanted 5w-30 instead of 0w-20 and they didn't bat an eye at it. If you're doing you own, just run what you want. IF they ever say anything, tell them to look at their service literature for the 6.6L gas motor - nearly identical architecture (minus CAFE garbage) that have 5w-30 on the fill cap.

I've been running a LT 6.2L for 125k on 5w-30 without any problems.......granted it's one of the good ones - 2017. LOL

On the 6.2L 21+ engine, you cannot use 5-30 oil categorically, only 0-20. Oil 5-30 simply does not pass at the right pressure of the oil pump when starting, with thicker oil, the owners themselves kill the engine

 

[Jay P Wy]

On the 6.2L 21+ engine, you cannot use 5-30 oil categorically, only 0-20. Oil 5-30 simply does not pass at the right pressure of the oil pump when starting, with thicker oil, the owners themselves kill the engine

BS... The Corvette & Camaro 6.2l engines are the same and they use other than 0w-20 oil (including the supercharged ones). The cam & programing are where the engines differ. The 0w-20 oil in the trucks is purely for CAFE and emissions.

 

[Vladimir2306]

BS... The Corvette & Camaro 6.2l engines are the same and they use other than 0w-20 oil (including the supercharged ones). The cam & programing are where the engines differ. The 0w-20 oil in the trucks is purely for CAFE and emissions.

The engines can be the same, but they are used in different modes, a sports car drives at high speeds, Tahoe or Yukon drives at low speeds. For high revs, the oil should be thicker and the oil pump should be programmed to thick oil, and the Yukon tahoe oil pump should be programmed to work with 0-20 oil