2024 6.6 gas 28000 engine failure

[James McArthur]

Started as ticking noise 2 days ago, I was afraid it was lifters so parked truck until Monday so I could get it to dealership.

on my way to dealership ticking noise turns to clank clunk awful noise, afraid engine is blown, will find out tomorrow when they check it out. Did I mentioned it’s a 2024 with only 28,800 miles on it? This should not be happening so soon. Anyone else experience this?

[No F-bdy Bs]

My 25' with just 6,900 on it has an oil consumption test underway as we speak. 

[Pryme]

11 hours ago, James McArthur said:

Started as ticking noise 2 days ago, I was afraid it was lifters so parked truck until Monday so I could get it to dealership.

on my way to dealership ticking noise turns to clank clunk awful noise, afraid engine is blown, will find out tomorrow when they check it out. Did I mentioned it’s a 2024 with only 28,800 miles on it? This should not be happening so soon. Anyone else experience this?

Was it using oil and you never checked it? 
 

A good friend of mine runs an oil change shop. It’s the norm he said that people go way way over their oci not the exception. 

[James McArthur]

It was not using oil, and I’ve been very picky maintaining my truck, no this issue just happened all of sudden with no warning, oil pressure was normal water temp normal and no check engine lights.

[Chuck FB]

5 hours ago, No F-bdy Bs said:

My 25' with just 6,900 on it has an oil consumption test underway as we speak. 

 

 

Were you noticing some oil consumption even early on or was there a sudden change and that it started to use oil. Also what oil change mile intervals has been done so far and what oil brand/type has been in the engine when its been using oil.  

[James McArthur]

No oil consumption what so ever, recommended D 5w30 per Chevrolet!

one day lifters rattle the next day rod bearings went out.

[James McArthur]

My nephew whom runs his own shop said it was chevys dirty little secret that when 6.6 were manufactured they blocks were out of specs causing a vibration in motor which is why the bearings went out!

he said they won’t own up to it for obvious reasons.

[AndrewF]

The 6.6 gas has been one of the more reliable engines produced lately.  Interested to see what the dealership says but hopefully you're still under warranty so it'll get taken care of. 

[Chuck FB]

38 minutes ago, James McArthur said:

No oil consumption what so ever, recommended D 5w30 per Chevrolet!

one day lifters rattle the next day rod bearings went out.

 

Have you been doing your own oil changes and if so any particular oil filter brand you have been using. Also within that theme of oil changes was the oil changed just prior to this occurrence or a while back. 

 

I am purely speculating that something mechanical either let go due to a defect and a chain reaction such as a valve dropped after a valve spring broke etc or I suppose there is a possibility that a cam or crank bearing could have turned restricting oil flow and the oil pressure would remain good on the gauge but in reality starving parts of the engine from adequate oil. I guess that remains to be seen if the dealership does a tear down or if they find a mess and determine a new engine gets dropped in and the original engine gets whisked away without a proper look. 

[No F-bdy Bs]

2 hours ago, Chuck FB said:

 

 

Were you noticing some oil consumption even early on or was there a sudden change and that it started to use oil. Also what oil change mile intervals has been done so far and what oil brand/type has been in the engine when its been using oil.  

 

I was given 2 "free" oil changes from the dealer when I bought it. 

I had them do the first one at 2059 miles. They used Gm Dexos 5/30. I checked the dipstick a few time. Maybe burned half a qt, maybe. 

Had my 2nd done at the same dealer, same oil at 5,700ish. Didn't seem to use any at that time. I probably checked a few times. 

Got a "Engine oil low, add oil" warning at 6,500, this past Saturday. No oil showing on dipstick. I had not checked it prior given I'd ojly gone abt 750 miles since it was changed. I was literally next door to a different dealership. I didn't take it back to the original dealer because I didn't want to drive it with the dash code (I didn't know how low it was, and didn't want any "You shouldn't have driven it with low oil") and I didn't want to add oil so they could document how low it was.

 

Dealer said it was 2.1qt low. They started the process. Determined there were no leaks (which I knew) Did an oil change. Took pics of dipstick, gave me some paperwork, and I have to bring it back in 1k miles. 

Hope it was a fluke. Hopemaybe  the other dealer didn't put quite enough oil it in last change. I don't want to deal with getting a new engine in a truck with so few miles. 

Edited April 28 by No F-bdy Bs

[No F-bdy Bs]

1 hour ago, James McArthur said:

My nephew whom runs his own shop said it was chevys dirty little secret that when 6.6 were manufactured they blocks were out of specs causing a vibration in motor which is why the bearings went out!

he said they won’t own up to it for obvious reasons.

That's not even remotely true.  There's literally no cases of out of spec 6.6 gas blocks. 

Edited April 28 by No F-bdy Bs

[Chuck FB]

2 hours ago, No F-bdy Bs said:

 

I was given 2 "free" oil changes from the dealer when I bought it. 

I had them do the first one at 2059 miles. They used Gm Dexos 5/30. I checked the dipstick a few time. Maybe burned half a qt, maybe. 

Had my 2nd done at the same dealer, same oil at 5,700ish. Didn't seem to use any at that time. I probably checked a few times. 

Got a "Engine oil low, add oil" warning at 6,500, this past Saturday. No oil showing on dipstick. I had not checked it prior given I'd ojly gone abt 750 miles since it was changed. I was literally next door to a different dealership. I didn't take it back to the original dealer because I didn't want to drive it with the dash code (I didn't know how low it was, and didn't want any "You shouldn't have driven it with low oil") and I didn't want to add oil so they could document how low it was.

 

Dealer said it was 2.1qt low. They started the process. Determined there were no leaks (which I knew) Did an oil change. Took pics of dipstick, gave me some paperwork, and I have to bring it back in 1k miles. 

Hope it was a fluke. Hopemaybe  the other dealer didn't put quite enough oil it in last change. I don't want to deal with getting a new engine in a truck with so few miles. 

 

I think if I am understanding the chain of events properly, you never happened to personally check the oil level right after the second free oil change done at 5700 total truck miles and indeed the big question would be if they totally goofed and shorted you by two quarts if not even over that amount. You will probably have some answers in 1 thousand miles one way or the other, I certainly hope for your sake and the sanity of us L8T owners that the oil change boy never even checked the level after the oil was added. Sad but true, it seems its to ones benefit to double check worked on items if its possible to do shortly after its been performed and as others have stated this engine is sensitive to consistency with its shown oil level depending on slight variable slopes one may park on. I try to park in the same location each time ( I often park in the garage so that's easy ) to check the level after its sat for a good while or overnight. So if anything suddenly shows up as off I would know about it shortly.  

 

 

Edited April 28 by Chuck FB

[No F-bdy Bs]

12 minutes ago, Chuck FB said:

 

I think if I am understanding the chain of events properly, you never happened to personally check the oil level right after the second free oil change done at 5700 total truck miles and indeed the big question would be if they totally goofed and shorted you by two quarts if not even over that amount. You will probably have some answers in 1 thousand miles one way or the other, I certainly hope for your sake and the sanity of us L8T owners that the oil change boy never even checked the level after the oil was added. Sad but true, it seems its to ones benefit to double check worked on items if its possible to do shortly after its been performed and as others have stated this engine is sensitive to constancy with its shown oil level depending on slight variable slopes one may park on. I try to park in the same location each time ( I often park in the garage so that's easy ) to check the level after its sat for a good while or overnight. So if anything suddenly shows up as off I would know about it shortly.  

 

 

Basically all that. 

I THINK I may have checked it at some point after the 2nd change , but wouldn't swear to it. 

Edited April 28 by No F-bdy Bs

[Pryme]

6 hours ago, James McArthur said:

My nephew whom runs his own shop said it was chevys dirty little secret that when 6.6 were manufactured they blocks were out of specs causing a vibration in motor which is why the bearings went out!

he said they won’t own up to it for obvious reasons.

Have him provide you with some facts to back up that outlandish claim. First I’ve heard of that. 

[No F-bdy Bs]

1 hour ago, Pryme said:

Have him provide you with some facts to back up that outlandish claim. First I’ve heard of that. 

Got a feeling someone is confusing the 6.2 for the 6.6.