GM 6.2L troubles aren't over.

[02SE]

With "just in time" manufacturing....A true fix would likely cause a stop in production. I would just put Nodular Iron Cranks in them as the problem lies with some of the Forged Steel Crankshaft finishing's.

Crank grinding is an art.

Have you heard any word of the 2019 LT5 having any issues?

 

[robbobster]

The cylinder-deactivation technology in the 5.3 and 6.3 are the exact same, with the same issues. The 6.2 adds crank issues.

That should be an L86 then, AFAIK. My 2019 Yukon was built in 2018, though the pickup got them first. L86 to L87 allegedly changed bearing suppliers, AFM to DFM, added stop/start capability, oil pump appears to be unique to the L87, and the crank machining issues that GM admits. Added the flex fuel option too.

Half of the lifters in the L86 are crappy.
All of the lifters in the L87 are crappy.

 

[ESP9935]

I don’t like AFM bcs of who pushed it - but, I live in truck central - high income LT folks - and don’t know anyone who are having either of these issues - some north of 200k doing real work …
And as Chris has pointed out - all can foul NORMAL lifters as well … some feedback from mechanics is like asking a Doctor if any sick people have been in …
Unlike the cars mentioned often - Ford, GM, and RAM do the work hard/play hard in N.A. - over to BrendanC …

They probably don't have 8L/10L issues either, right?
The issue is pervasive whether your anecdotes reflect it or not.

 

[D60]

Mine came disabled since some 21's had an issue getting some afm chip computer box thing for it so they produced mine without it so I got lucky.

I love how these types of things are THE mOSt ImpoRtANt tHiNG EVAR tO SaVE tHe PLaNeT....except when we can't get parts then it's like, "Meh, never mind."

 

[D60]

Toyota is just replacing a bunch of engines without them failing as far as I have heard.

Good way to be. Not giving people the runaround.

Are they footing the supplier with the bill like they did with frames? Dana got really screwed on that mess.

Plenty of horror stories on Tundra replacement.

You could argue this is an individual dealer issue but I'd point out they aren't paying enough labor time so it's difficult to expect techs to care.

Dirty interiors, greasy fingerprints, new rattles, things not put back together, broken fasteners and most importantly: months of delays.

It's not much different than open heart surgery: you're not likely to come back 100%.

I understand engines are replaced all the time, but usually on older vehicles with higher miles where they already show wear and tear and someone's been in the engine bay dozens of times for alternator, a/c compressor, radiator, water pump etc....thus you EXPECT some broken clips and signs of previous work

 

[clinebarger]

Have you heard any word of the 2019 LT5 having any issues?

Nothing so far, Bet it's crankshaft was still being ground & polished at Tonawanda engine plant.....Just like the LT1, LT4 & L86 that uses the same forged crank.

Tonawanda didn't have the production capacity to produce all the forged cranks needed as the L87 was going to be installed in more trim levels in the T1 chassis than L86's were installed in K2 chassis.

GM outsourced production to Macimex in Mexico.

 

[dfarr67]

My next door neighbor bought a brand new GMC truck with the Duramax diesel. That engine blew in 5000 miles!
GM put a new one in.

So did mine- except it took months for that to happen. 3500 dually which helps him make a living.

 

[dfarr67]

Thanks I'll pass that along. The active fuel management still fails in the 5.3. GM said they fixed the problem in the 6.2 engine.

For those saying they should have known, outside of BITOG most people aren't down in the weeds "car people" beyond knowing they like one more than another and just have an expectation (not unreasonable) that a brand new whatever isn't going to ruin the engine in 6000 miles.

As far as Lemon Law or Buy Back they don't want it now so they're looking into those I was told. They have 2 teenage boys and do lots of road trips, how do you trust something after this? How many miles would you put on to say it's good now? Is a replacement engine any different that what comes in it new?

Work truck 2019 5.3L 265K km 10k service intervals, I ask for 5-30 oil now....other than a coil pack and two sets of plugs and wires- never an issue with lifters. Just the pos trans.

 

[dfarr67]

On top of the 6.2L L87 debacle, are the 10 speed trans issues. Our Camaro is affected by that. With seeing all the recalls from multiple manufacturers (some who used to be a pillar of reliability), It seems that everybody forgot how to design and build engines and transmissions.

Maybe this is the future with new generation engineers.....

 

[02SE]

Nothing so far, Bet it's crankshaft was still being ground & polished at Tonawanda engine plant.....Just like the LT1, LT4 & L86 that uses the same forged crank.

Tonawanda didn't have the production capacity to produce all the forged cranks needed as the L87 was going to be installed in more trim levels in the T1 chassis than L86's were installed in K2 chassis.

GM outsourced production to Macimex in Mexico.

Thanks for the info. The engine I have was assembled by the original owner of the car, of course overseen by one of the people who regularly assembled the engines by hand, in Bowling Green.

I'm curious if that level of attention might have made it an overall better engine, possibly to the level of basically being blueprinted. At least I like to hope so.

 

[clinebarger]

Thanks for the info. The engine I have was assembled by the original owner of the car, of course overseen by one of the people who regularly assembled the engines by hand, in Bowling Green.

I'm curious if that level of attention might have made it an overall better engine, possibly to the level of basically being blueprinted. At least I like to hope so.

Does "blueprinting" catch a mis-ground crankshaft is the question?

 

[02SE]

Does "blueprinting" catch a mis-ground crankshaft is the question?

As I said, I would hope the supposed extra level of attention would catch something like that. But I don't know, as I wasn't there, so I don't know how closely each individual part was scrutinized, measured, etc. Or did they just pull parts off the shelf that should be within spec, and call that good enough? The cars original owner was no rookie when it comes to engines either, so I like to think he would've wanted to get everything as close to optimal as possible.

The engine seems to run very nicely, with about 7k miles on it.

Anyway, I thought I'd ask your opinion, as I know you have a lot of experience, particularly with GM.