2022 6.2L Yukon Spun Crankshaft Bearing

[DuraYuk]

Mr. Goodwrench, that wasn't my point at all. I'm very well versed on what causes a spun bearing. AFM is a constant thread around here, as is some sort of deleting or disabling it. So I figured I'd put a line in that guy's on here would agree with and find entertaining, however unrealistic it may be to have done under 'warranty.' It's a thing called a "joke" to make some light of a ****** situation.

I see. It was your attempt at humor. Haha.

 

[WalleyeMikeIII]

Only premium fuel was used in the vehicle so it wasn't a fuel issue.

Ok, cool. Detonation can cause issues, including spun bearings…so this should rule that out as a possible cause.

 

[tom3]

For an engine with this mileage I'd sure assume it was not an assembly screwup, bearing failure, oiling problem, or a machining deal. I'm guessing it was a casting shift, several heat cycles and the block distorted a couple thousands of an inch. Rebuilding the motor won't guarantee it's done with the movement. But that's just a guess. Keep us posted, inquiring minds are real nosy.

 

[Boomer73]

Hi all,

About 3 weeks ago I had my Yukon with the 6.2L engine in cruise at 115km/hr (~70mph) when all of a sudden I realized I was dropping speed and noticed the vehicle was in neutral and the engine was off. No unusual engine noise occurred or check engine lights came on. I coasted to the side of the highway and came to a stop. When trying to restart the vehicle nothing would happen. I ended up having the vehicle towed to my local dealership where they tore into the engine and found that the crankshaft bearing had spun. Vehicle was purchased in December of 2022 and had roughly 5000km on it when the failure occurred. Anyways, the dealership is going to attempt to repair the failed parts.

Welcome to the L87 spun crank bearing club. I have two spun crank bearings and am waiting on a new engine (indefinitely according to GMC).

 

[vcode]

Welcome to the L87 spun crank bearing club. I have two spun crank bearings and am waiting on a new engine (indefinitely according to GMC).

That indefinitely part is disturbing, especially for the coin paid to get the 6.2L......

 

[NoYukonYet_1Jeep]

Hey please see my post - I went through this exact scenario. I’m about a week in on my new motor now. Dealer had my car for a month waiting on a new 6.2L. Tried to share relevant details in my posts but feel free to reach out if I can help.

2023 Yukon Denali 6.2L, Dead at 3600 miles

Picked up our truck (finally) after a 9 month wait on the custom order -January 9th. 2023 Yukon Denali with 6.2L. Logged some good mileage, really enjoying the vehicle and all it has to offer. 3600 miles later and exactly 1 month to the day on Feb 9th - Driving home 1 block from my house...

www.tahoeyukonforum.com

 

[NoYukonYet_1Jeep]

Hi all,

About 3 weeks ago I had my Yukon with the 6.2L engine in cruise at 115km/hr (~70mph) when all of a sudden I realized I was dropping speed and noticed the vehicle was in neutral and the engine was off. No unusual engine noise occurred or check engine lights came on. I coasted to the side of the highway and came to a stop. When trying to restart the vehicle nothing would happen. I ended up having the vehicle towed to my local dealership where they tore into the engine and found that the crankshaft bearing had spun. Vehicle was purchased in December of 2022 and had roughly 5000km on it when the failure occurred. Anyways, the dealership is going to attempt to repair the failed parts.

I’m curious of your exact mileage - My rod bearings blew at 3,677 miles. (Cylinders 5 & 6) . Can’t just be a strange coincidence here.
I did the miles / KM conversion and you’re at around 3,106?

FYI, my starter motor was toast and also blew a 400A fuse from the handful of times I tried to get it to turn over before it was towed to the dealer. This was only discovered after they had installed the new motor.

 

[clojczyc]

I’m curious of your exact mileage - My rod bearings blew at 3,677 miles. (Cylinders 5 & 6) . Can’t just be a strange coincidence here.
I did the miles / KM conversion and you’re at around 3,106?

FYI, my starter motor was toast and also blew a 400A fuse from the handful of times I tried to get it to turn over before it was towed to the dealer. This was only discovered after they had installed the new motor.

My failure were the rod bearings on cylinder 7 which occurred at 5568km (3460 miles) on the engine.

 

[RST Dana]

I’m curious of your exact mileage - My rod bearings blew at 3,677 miles. (Cylinders 5 & 6) . Can’t just be a strange coincidence here.
I did the miles / KM conversion and you’re at around 3,106?

FYI, my starter motor was toast and also blew a 400A fuse from the handful of times I tried to get it to turn over before it was towed to the dealer. This was only discovered after they had installed the new motor.

Your starter was toast because it tried to spin a locked up crankshaft? That would be correct.

 

[NoYukonYet_1Jeep]

My failure were the rod bearings on cylinder 7 which occurred at 5568km (3460 miles) on the engine.

Pretty damn close … I wonder what GM’s thoughts are on these motors spinning rod bearings between 3-4K miles. There’s gotta be a short list of these somewhere in their system.

Sucks for us. Hope they get you back in order soon.