Yukon 2022 6.2 engine died at 75,000 miles.

[blanchard7684]

Vladimir did any bearing not spin or get damaged?

 

[Vladimir2306]

Wow, this is interesting... I wonder if this is the transmission just downshifting automatically to safely come down in speed (by exercising 'engine brake') or if it is the problem that is accidentally causing the engine to go past redline.

Whatever the transmission is doing, it is not helping the engine..... if the engine was having trouble to begin with the transmission shouldn't be making the engine go up in RPM !!!!!

I am actually drawing a blank as I don't know what should happen, but if I am not mistaken on an old 3 or 4 or 6 speed automatic transmission, if the engine power is killed, the transmission would just coast down and stop in whatever gear it is in but shouldn't cause engine RPM to increase !!... but maybe I'm wrong...( on a manual transmission the operator can obviously control it precisely)

Yes, it was strange, usually I heard that the automatic transmission goes into neutral, but here it was as if the automatic transmission was trying to brake the car, but the cruise control did not allow it to do this

 

[Vladimir2306]

Vladimir did any bearing not spin or get damaged?

As far as I understand, 4 bearings were damaged. They were just wound up

 

[blanchard7684]

As far as I understand, 4 bearings were damaged. They were just wound up

Can you elaborate which mains and which rod bearings were damaged?

 

[blanchard7684]

One thing I'm observing that is very unexpected--the front counterweight was grinding on the main cap and jaw area. Enough to extrude the aluminum.

I can't tell from the pictures but it looks like maybe another counterweight also had contact with the block.

 

[Vladimir2306]

Can you elaborate which mains and which rod bearings were damaged?

I will check with the service

 

[Antonm]

And another photo.To the question, did oil 0-40 help in this situation? definitely not, it feels like the oil stopped being supplied at all at some point, and 0-50 wouldn't have helped there. The reason, as always, is unclear. Because there were no errors, neither P00016 nor any other, there was no low oil pressure, there was no overheating of the engine, even the automatic transmission oil was normal. there wasn't even any rumbling or noise. Everything happened instantly, literally in seconds.

You literally just had a catastrophic oil related bearing failure, but you still think that 0W20 oil is the way to go ,,, just mind blowing.

You were running at high load/ low RPM (high load from speed and towing, low RM because these 10 speed transmissions always keep the RPM low when cruising) . And guess what operating condition is the hardest on oil shear/ oil film strength ,,,, that's right,, high load and low RPM. Its not wonder the 0W20 gave up.

Interesting to note, you had MAIN bearings spun, the whole recall thing is centered around ROD bearings, although you had some of those damaged as well.

And not that it matters here, but DFM still activates in trailer tow mode as well, you said in one post earlier in this thread that it didn't , but that is not correct.
...

 

[Vladimir2306]

You literally just had a catastrophic oil related bearing failure, but you still think that 0W20 oil is the way to go ,,, just mind blowing.

Interesting to note, you had MAIN bearings spun, the whole recall thing is centered around ROD bearings, although you had some of those damaged as well.

And not that it matters here, but DFM still activates in trailer tow mode as well, you said in one post earlier in this thread that it didn't , but that is not correct.
...

At 150 km/h, the DFM definitely doesn't work, the oil is fresh, I've driven more on it than a large number of other owners. In Russia, we have people whose engine died on both 5-30 and 0-40 oil. It is not the problem that is obvious

 

[Antonm]

At 150 km/h, the DFM definitely doesn't work, the oil is fresh, I've driven more on it than a large number of other owners. In Russia, we have people whose engine died on both 5-30 and 0-40 oil. It is not the problem that is obvious

LOL okay, you literally have a blown up engine in your lap from an oil related failure,,,, but still don't think the oil contributes at all ,, and you think "that is obvious". Okay man you do you, put it back together and pour some more 20 weight in it.

Also interesting to note, the Corvette with the exact same rotating assembly (exactly the same, part number for part number) that has spec'd 0W40 oil from the being is not having issues (and Corvette owners whine about everything),,,, strange.
...

 

[blanchard7684]

It looks like one or more mains spun. this stops oil flow to the connecting rod bearings.

So it was mains fail-->connecting rods.

What caused the mains to spin is the question.

How did the thrust bearing look?

I really don't like how the front counterweight contacted the block...