Engine Failure

[Kevin0311]

Isnt 2029 four years away? So 4/50k would be unless you got your 2025 in april of 2024?

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[Finally-a-V]

@TruckeeTaurus ....Um, my dude, 2029 minus 2025 is, um, 4. So, yes, standard warranty is 4y/50K.

I'm more interested in your extended warranty info.

It's all good!

 

[TruckeeTaurus]

@TruckeeTaurus ....Um, my dude, 2029 minus 2025 is, um, 4. So, yes, standard warranty is 4y/50K.

I'm more interested in your extended warranty info.

It's all good!

LOL! Yeah man, you’re right! I had it twisted…

Y’all are making me feel better and better about getting that extended warranty man. There was a hot second there that I felt like a simp getting taken advantage of.

 

[ngoni]

LOL! Yeah man, you’re right! I had it twisted…

Y’all are making me feel better and better about getting that extended warranty man. There was a hot second there that I felt like a simp getting taken advantage of.

Just rolling in and doing a diagnosis is a chunk of change at this point so extended warranty supported by the manufacturer that won't give you a ton of BS when you need to use it is probably well worth the price of admission.

 

[565565]

It Took GM More Than 28,000 Failed V8s And Three Internal Investigations Before Recalling Its L87 Engines - The Autopian

GM's problematic L87 6.2-liter V8 is finally getting recalled, but not all model years are included in the fix.

www.theautopian.com

 

[dlstelma]

@TruckeeTaurus You paid $1000? I'm, checking on extending a warranty on a low mileage 2023 and the first Cadillac dealer I talked to about buying/adding the extended warranty (not 3rd party!) quoted me $3800 for a powertrain 8yr/120k mile warranty to a platinum/everything 10yr/120k mile for $6k. This is from date of purchase of warranty (I'm skeptical if that is actually the case on date!). I'm love to hear from those that bought extended warranties, especially from those that added a warranty after initial purchase!)

Thanks!

purchased extended warranty with the ordered 2023 CT5VB, includes damaged wheels. i think it was around $5000. 100k miles, no expiration date. i only drive it a few thousand miles a year (and store it in the winter), so i'm set for life with this car.

 

[5VBW Nick]

purchased extended warranty with the ordered 2023 CT5VB, includes damaged wheels. i think it was around $5000. 100k miles, no expiration date. i only drive it a few thousand miles a year (and store it in the winter), so i'm set for life with this car.

Who is that through? The no expiration date is crazy good.

 

[dlstelma]

Who is that through? The no expiration date is crazy good.

I'd have to look into my paper work. I bought it through Harvey Lexus Cadillac of Grand Rapids.

 

[ngoni]

It Took GM More Than 28,000 Failed V8s And Three Internal Investigations Before Recalling Its L87 Engines - The Autopian

GM's problematic L87 6.2-liter V8 is finally getting recalled, but not all model years are included in the fix.

www.theautopian.com

Now instead of just replacing the oil, they're going to replace every engine. That's massive and will likely take years.

https://static.nhtsa.gov/odi/rcl/2025/RCRIT-25V274-5347.pdf

 

[dlstelma]

I'd have to look into my paper work. I bought it through Harvey Lexus Cadillac of Grand Rapids.

I have a $100 deductible, no expiration date, 100k miles to cover the car (provided by AUL) , minus wear and tear items (tires, brakes, rotors, clutch, belts, fluids). The wheels are covered for 72 months (provided by RCWS). It looks like this extended coverage has to be purchased with a new car. That is not surprising since GM would cover the first 4yrs, bumper to bumper, 6yrs, for drivetrain.....plenty of time for the extended warranty provider to make money on my "deposit."

 

[NorCal Blackwing]

Now instead of just replacing the oil, they're going to replace every engine. That's massive and will likely take years.

https://static.nhtsa.gov/odi/rcl/2025/RCRIT-25V274-5347.pdf

Thanks for posting the link. Notable that the 5BW isn't on the list. Presumably because the raw number of engine failures hasn't met the threshold for an official NHTSA action?

 

[ngoni]

Thanks for posting the link. Notable that the 5BW isn't on the list. Presumably because the raw number of engine failures hasn't met the threshold for an official NHTSA action?

It's only for the L87 engine. The LT4 is a cousin but a fairly different animal. Plus the LT4 has always had 0W-40 so it had a thicker film of protection the entire time. Putting 0W-20 in a big 'ol V8 regardless of use was pretty crazy for the L87. I know they say the root cause was improper machining but putting such a thin oil in them had to be a big contributing factor.

 

[jimijuma]

Thanks for posting the link. Notable that the 5BW isn't on the list. Presumably because the raw number of engine failures hasn't met the threshold for an official NHTSA action?

A HUGE part of it I'm sure. Assuming that the LT4 may be included in this whole mess (a reckless assumption for sure). Actions typically aren't taken until there is overwhelming pressure to do so.

 

[668LT4]

It's only for the L87 engine. The LT4 is a cousin but a fairly different animal. Plus the LT4 has always had 0W-40 so it had a thicker film of protection the entire time. Putting 0W-20 in a big 'ol V8 regardless of use was pretty crazy for the L87. I know they say the root cause was improper machining but putting such a thin oil in them had to be a big contributing factor.

Exactly. The L87 is a different engine the LT4. There seems to be a lot of confusion about this fact.

In another thread where the guy lists all known LT4 blown engines, we compared that against 3 years of production. Was it less than 1%, or 2%? Super low. So I am not sure what the % needs to before a similar remedy is required. But I highly doubt 50 +/- blown engines out of 6000 +/- produced has GM concerned. Even though 50 seems like a lot, we also must remember things like the asshole car reviewer on youtube redlining a brand new manual with 12 miles... how many of the 50 were treated like that at some point? How many Blackwings have been resold with less than 1500 miles? None of those were ever redlined or abused during break-in? We will never really know. But let's stop comparing the LT4 to the L87. As of today, there is no such comparison warranted.

 

[MookdocOE]

It's only for the L87 engine. The LT4 is a cousin but a fairly different animal. Plus the LT4 has always had 0W-40 so it had a thicker film of protection the entire time. Putting 0W-20 in a big 'ol V8 regardless of use was pretty crazy for the L87. I know they say the root cause was improper machining but putting such a thin oil in them had to be a big contributing factor.

Did it? That's why new L87's being built as of today are still factory filled 0W-20?

 

[ngoni]

Did it? That's why new L87's being built as of today are still factory filled 0W-20?

The original guidance to dealers was to check the ECU for evidence of the problem (IIRC cam phase alignment). If the ECU hadn't recorded the engine as out of spec, the dealers were to change the oil to 0W-40 Supercar, swap out the oil fill cap with a "0W-40" cap, and give the customer a new page for the owners manual that says the car needs 0W-40.

Now they're saying just recall all of them. I don't know what new engines are being filled with assuming GM has their parts properly machined to the correct tolerances now.

 

[MookdocOE]

The original guidance to dealers was to check the ECU for evidence of the problem (IIRC cam phase alignment). If the ECU hadn't recorded the engine as out of spec, the dealers were to change the oil to 0W-40 Supercar, swap out the oil fill cap with a "0W-40" cap, and give the customer a new page for the owners manual that says the car needs 0W-40.

Now they're saying just recall all of them. I don't know what new engines are being filled with assuming GM has their parts properly machined to the correct tolerances now.

If the engine passes inspection it gets what you stated the oil, filter, crankcase cap, leaflet filled with 0W-40 with 150k warranty. If the engine in question does not pass inspection it gets the replacement L87 or new motor. That motor uses 0W-20 so your weight comment about the oil cause and effect is not factual.

 

[NorCal Blackwing]

Exactly. The L87 is a different engine the LT4. There seems to be a lot of confusion about this fact.

In another thread where the guy lists all known LT4 blown engines, we compared that against 3 years of production. Was it less than 1%, or 2%? Super low. So I am not sure what the % needs to before a similar remedy is required. But I highly doubt 50 +/- blown engines out of 6000 +/- produced has GM concerned. Even though 50 seems like a lot, we also must remember things like the asshole car reviewer on youtube redlining a brand new manual with 12 miles... how many of the 50 were treated like that at some point? How many Blackwings have been resold with less than 1500 miles? None of those were ever redlined or abused during break-in? We will never really know. But let's stop comparing the LT4 to the L87. As of today, there is no such comparison warranted.

Lol I'm that guy... it's not a comprehensive list of all the failures, just the ones reported on this forum. If we go for the number you estimated, 50 motors out of every 6000, that actually is really not great from a modern manufacturing quality point of view.

The reason I made the comment is that from the outside looking in, the failure mode reported for our LT4 looks remarkably similar to the issues with the L87. Hard to say if the defects are parts or designs in common between the engines or if it's just a coincidence. I'm not buying the explanation that the failures are due to drivers breaking in their cars incorrectly though.

I'm not getting my knickers in a twist over it, I'll just get the extended warranty and continue enjoying my car, even, dare I say it, redlining it often!

 

[white98ls]

I have a $100 deductible, no expiration date, 100k miles to cover the car (provided by AUL) , minus wear and tear items (tires, brakes, rotors, clutch, belts, fluids). The wheels are covered for 72 months (provided by RCWS). It looks like this extended coverage has to be purchased with a new car. That is not surprising since GM would cover the first 4yrs, bumper to bumper, 6yrs, for drivetrain.....plenty of time for the extended warranty provider to make money on my "deposit."

No expiration date is insane. I typically only put 7k/yr in my daily (which is the 5BW) so this would be amazing.

 

[ngoni]

If the engine passes inspection it gets what you stated the oil, filter, crankcase cap, leaflet filled with 0W-40 with 150k warranty. If the engine in question does not pass inspection it gets the replacement L87 or new motor. That motor uses 0W-20 so your weight comment about the oil cause and effect is not factual.

Oil was absolutely a contributing factor. Don't take it from me, take it from an expert: