Customer C8 Z06 engine issue
Burning Brakes
Joined: Dec 2004
Posts: 984
Likes: 809
I'm not so sure there is something wrong with the engine itself, please hear me out...
When the engine starts at 10:10 - the engine's exhaust does not display an audible miss or a misfire - in other words, all cylinders are firing normally.
The 'smoke' is not blue as someone stated earlier, it is white which more than likely is condensation in the exhaust burning-off - in other words, it's not oil being burned.
As for the noise, it could be the valvetrain, but because the engine is idling normally per the exhaust note, it may not be the valvetrain.
Therefore, I'm speculating the noise could be a bearing going bad - for example, like on the alternator, or air conditioning compressor, or something else similar that rotates while the engine is running.
To reiterate, the big clue for me is the exhaust note does not sound like the engine is missing on a cylinder.
Now that I typed that and thinking it thru, since the engine has 2-intake and 2-exhaust valves per cylinder, perhaps 1 valve/lifter failed meaning the 2nd valve/lifter is still working normally allowing the engine to run without an audible miss from the exhaust - so there's that possibility too.
Just speculating of course, but it is plausible.
When the engine starts at 10:10 - the engine's exhaust does not display an audible miss or a misfire - in other words, all cylinders are firing normally.
The 'smoke' is not blue as someone stated earlier, it is white which more than likely is condensation in the exhaust burning-off - in other words, it's not oil being burned.
As for the noise, it could be the valvetrain, but because the engine is idling normally per the exhaust note, it may not be the valvetrain.
Therefore, I'm speculating the noise could be a bearing going bad - for example, like on the alternator, or air conditioning compressor, or something else similar that rotates while the engine is running.
To reiterate, the big clue for me is the exhaust note does not sound like the engine is missing on a cylinder.
Now that I typed that and thinking it thru, since the engine has 2-intake and 2-exhaust valves per cylinder, perhaps 1 valve/lifter failed meaning the 2nd valve/lifter is still working normally allowing the engine to run without an audible miss from the exhaust - so there's that possibility too.
Just speculating of course, but it is plausible.
Last edited by yz250fPilot; Dec 29, 2022 at 09:50 AM.
Drifting
Joined: Dec 2010
Posts: 1,782
Likes: 1,555
From: Las Vegas NV
I'm not so sure there is something wrong with the engine itself, please hear me out...
When the engine starts at 10:10 - the engine's exhaust does not display an audible miss or a misfire - in other words, all cylinders are firing normally.
The 'smoke' is not blue as someone stated earlier, it is white which more than likely is condensation in the exhaust burning-off - in other words, it's not oil being burned.
As for the noise, it could be the valvetrain, but because the engine is idling normally per the exhaust note, it may not be the valvetrain.
Therefore, I'm speculating the noise could be a bearing going bad - for example, like on the alternator, or air conditioning compressor, or something else similar that rotates while the engine is running.
To reiterate, the big clue for me is the exhaust note does not sound like the engine is missing on a cylinder.
Now that I typed that and thinking it thru, since the engine has 2-intake and 2-exhaust valves per cylinder, perhaps 1 valve/lifter failed meaning the 2nd valve/lifter is still working normally allowing the engine to run without an audible miss from the exhaust - so there's that possibility too.
Just speculating of course, but it is plausible.
When the engine starts at 10:10 - the engine's exhaust does not display an audible miss or a misfire - in other words, all cylinders are firing normally.
The 'smoke' is not blue as someone stated earlier, it is white which more than likely is condensation in the exhaust burning-off - in other words, it's not oil being burned.
As for the noise, it could be the valvetrain, but because the engine is idling normally per the exhaust note, it may not be the valvetrain.
Therefore, I'm speculating the noise could be a bearing going bad - for example, like on the alternator, or air conditioning compressor, or something else similar that rotates while the engine is running.
To reiterate, the big clue for me is the exhaust note does not sound like the engine is missing on a cylinder.
Now that I typed that and thinking it thru, since the engine has 2-intake and 2-exhaust valves per cylinder, perhaps 1 valve/lifter failed meaning the 2nd valve/lifter is still working normally allowing the engine to run without an audible miss from the exhaust - so there's that possibility too.
Just speculating of course, but it is plausible.
"engine misfire
A flashing light signifies that the problem is very serious and if not taken care of expeditiously may result in major and significant damage to the vehicle. This blinking light usually reveals a severe engine misfire allowing unburned fuel to be dumped into the exhaust system."
Last edited by mfain; Dec 29, 2022 at 11:20 PM.
Team Owner
Joined: Aug 2006
Posts: 24,706
Likes: 1,180
From: Raleigh
Burning Brakes
Joined: Sep 2015
Posts: 1,174
Likes: 824
From: Dallas Texas
I try not to think about the 1st year thing but I do recall when I was looking for a C7Z I avoided the early cars with the different supercharger lids. Actually that also happened in the 2nd generation ctsv's
Fingers crossed this car doesn't follow the trend but wouldn't be surprised at all
Fingers crossed this car doesn't follow the trend but wouldn't be surprised at all
Burning Brakes
Joined: Oct 2013
Posts: 912
Likes: 897
From: Torch Lake Michigan
Okay I’ll start the conspiracy theory. We have not seen or heard anything (at least I have not), since his video. I’ll bet that GM immediately got in contact with this guy and made arrangements to get the car back to Milford or Warren tech center. They will get him an allocation for a new car upon a non-disclosure agreement. They will tear the engine down, find out what happened, and then try as hard they can to prevent this in the future.
Drifting
Joined: Mar 2008
Posts: 1,473
Likes: 548
From: Orlando & Flagler Beach FL
What gets me is that the Dealer received probably a $50,000 ADM (pure profit) and they don't have a manager who can go open up and receive the car that night from the tow truck? They make no xtra effort - geez.
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Safety Car
Joined: Jun 2008
Posts: 3,815
Likes: 5,887
I try not to think about the 1st year thing but I do recall when I was looking for a C7Z I avoided the early cars with the different supercharger lids. Actually that also happened in the 2nd generation ctsv's
Fingers crossed this car doesn't follow the trend but wouldn't be surprised at all
Fingers crossed this car doesn't follow the trend but wouldn't be surprised at all
...but how many years were LS7's blowing up before GM admitted there was a problem? Wasn't it something like 5 years after production started? haha If it wasn't for the recession/bankruptcy keeping the C6 alive for so long those cars would have been a total wildcard for their entire production run.
Le Mans Master
Joined: Sep 2000
Posts: 6,303
Likes: 714
From: Bartlett IL
Similar situation when the first C4 ZR-1 were delivered and camshaft lobes were getting wiped.
motors were not repaired but replaced w original going back to GM. Turned out some driver at the plant was starting cars with WOT in cold weather.
motors were not repaired but replaced w original going back to GM. Turned out some driver at the plant was starting cars with WOT in cold weather.
Race Director
Joined: Dec 2006
Posts: 12,409
Likes: 2,915
From: Fort Worth, Texas
Okay I’ll start the conspiracy theory. We have not seen or heard anything (at least I have not), since his video. I’ll bet that GM immediately got in contact with this guy and made arrangements to get the car back to Milford or Warren tech center. They will get him an allocation for a new car upon a non-disclosure agreement. They will tear the engine down, find out what happened, and then try as hard they can to prevent this in the future.
https://www.caranddriver.com/news/a4...gine-52-miles/
Race Director
Joined: Nov 2017
Posts: 12,759
Likes: 10,657
From: Prosper TX/Austin TX
2020 C6 of the Year Winner - Modified
Safety Car
Joined: Jun 2008
Posts: 3,815
Likes: 5,887
So I guess when it comes to GM it's not "never buy the first year"... its "always buy an extended warranty" lol
Burning Brakes
Joined: Oct 2013
Posts: 912
Likes: 897
From: Torch Lake Michigan
He posted another and it looks like this will be the second used C8Z06 for sale or he’s just milking the YouTube views, curious to find out how serious of an issue it really is.
https://www.caranddriver.com/news/a4...gine-52-miles/
https://www.caranddriver.com/news/a4...gine-52-miles/
I don’t think he cares about clicks he doesn’t make his living via YouTube. That last one was on the 24th? Hopefully he follows up with updates.
Melting Slicks
Joined: Jun 2006
Posts: 2,500
Likes: 261
From: Miami Florida
First episode about 4000 miles. Was something catastrophic. When I came out of a corner and went full throttle I heard a large bang and parts and oil everywhere. I have a sheared wrist pin. Never found out the cause. Second time had about 14k miles. Cause was a fractured #1 piston which destroyed the cylinder. That time it was an almost non event. Came off the track into the paddock and the engine just stalled.
Thread Starter
Racer
Joined: Sep 2020
Posts: 399
Likes: 486
According to the video the dealer offered him 3 options:
1) Get a full refund
2) Order a new car to his spec (6 month wait)
3) Repair the existing car (new engine required) + 100,000 mile warranty (2 month wait)
He chose option 3. Looks like it was no fault of the owner as per the conspiracy theories around here, either way good on GM for taking care of the customer.
Drifting
Joined: Mar 2020
Posts: 1,570
Likes: 1,029
From: 31 hours East of Peoria, AZ
How mad would you be if you were that guy, paid 100K in ADM to get a car early and then had to wait 6 months for a new engine? Even worse it looks like it had the **** scratched outta the wheels the way they strapped it down on the tow truck. And it's black so after it spends god knows how long sitting outside BFE Chevy, being leaned into, worked on, bird bombed and walked past his paint should be just about hammered ****. Then once it's fixed every lot rat gets to take a turn behind the wheel for 'drivability testing'. That guy is living my greatest nightmare.
The warranty took care of everything.
Last edited by JVi; Dec 30, 2022 at 11:12 PM.
Safety Car
Joined: Jun 2008
Posts: 3,815
Likes: 5,887
According to the video the dealer offered him 3 options:
1) Get a full refund
2) Order a new car to his spec (6 month wait)
3) Repair the existing car (new engine required) + 100,000 mile warranty (2 month wait)
He chose option 3. Looks like it was no fault of the owner as per the conspiracy theories around here, either way good on GM for taking care of the customer.
Hopefully the service dept gets the job done right and he doesn't have any more headaches.
Thread Starter
Racer
Joined: Sep 2020
Posts: 399
Likes: 486
The only real problem I foresee is the Black paint is going to get thrashed, unless it has PPF which I doubt with only 52 miles.
Race Director
Joined: Dec 2006
Posts: 12,409
Likes: 2,915
From: Fort Worth, Texas