There is always going to be infant mortality in mass production.

GM may have fixed issues from early production, but that doesn't mean defects( whether it is assembly or part defect) won't still make it through.

Hope the issues get resolved and the new engine never gives you further issues along with the rest of the vehicle!

 

At least it seems I won't be waiting for months, the new engine shipped out from MI today and should arrive in 7-10 days. My dealer contact said they have never seen that much metal in an oil sample before. Fingers crossed nothing besides the engine was damaged, the shaking got quite severe before I was able to shut it off in a safe location. I did experience a stall pulling away from a stop the night before the failure, which never happened in my Stingray, might have been an early sign of the impending failure.

 

Sorry to hear of your troubles. Hopefully, it will be repaired and back to you soon. Would you post who built your engine?

 

I guess I’m lucky.. been great

 

Engine replacement is complete, I picked the car up yesterday. New engine arrived at the dealer on Friday and the install was completed on Wednesday. First impression is that the new engine seems to be smoother and quieter in terms of NVH than the engine that failed. Fortunately the new engine has a different builder than the original, I don't think I would ever be able to fully trust it if it had been the same person. Sadly I don't think I will be driving it much over the long weekend, the forecast morning temps are just too cold and I will be busy in the afternoons.

 

There is zero reason to believe that the person who assembled it is the cause of the failure. You will never know why it failed cause GM will not share it, but could be of multiple of reasons.

This is why I wouldn't be upset if GM stops with the practice of putting the persons name on the engine. Leads to unnecessary dragging their names through the mud since people will look at the name on the engine and blame them for any problems even if it was a part or design defect.

 

you don’t know how lucky you are. My 2023 Z06 engine blew end of August and I still don’t have my car back. Engine finally came in 2 weeks ago so I should have it back any day.

 

I agree, that's why I won't post the name of the original builder. Logically I know there's basically no chance the failure was a result of the person who built it, but psychologically there's comfort in anything that makes the new engine different from the one that failed.

 

I have a 2023 Z06 with around 6k Miles now. Break in procedures were done by the book as I'm the only owner for this car and i always keep at eye on oil temps during cold starts before i open her up. Anyways, i was driving in the canyons at full throttle going uphill and felt slight drop in power, as soon as i lifted to check the gauges the engine went down to 0 RPM and transmission put me in N until i coasted to a safe spot. The strange thing is that there was no sound or indication of mechanical failure and the car had it service done a week earlier so oil and everything was new.

My friend chasing behind me told me, he saw out of the two right exhaust tips a large flame that reached my rear wing before i started to slow down. I checked for oil residue in the exhaust tips and it was clean. I suspected an ignition issue on the right bank of the engine explaining the unburnt fuel coming out of the right side pipes and the car just shut down for safety. Dealer saw misfire codes at pistons 1 and 7 and early indication they see some metal shavings in the oil which is not a good sign.

Anyways the car is at the dealer now and GM asked them to open the engine to inspect it. Hopefully they can the car back to me quickly, i miss it already.

 

Sometimes there is little or no evidence of a blown engine. I have blown 3 C8 engines. Two in the stingray. The first one was catastrophic with a loud bang and zero oil pressure. Big hole in the case. Oil all over. I have a sheared wrist pin on my desk from that event.
however the last two were non events. In one the engine just shut down in a parking lot. Normal oil pressure. That was a cracked piston. The most recent started once again at idle. Had misfires on all cylinders. Normal oil. It was a melted and cracked third cylinder.
All covered under warranty. Hope you get yours back soon.

 

Jeez man, what are you doing to your cars to blow 3 Stingray pushrod LS/LT motors? Those things are bulletproof with an extremely low failure rate. Are you going into higher RPMs when the engine oil is not at least 180 degrees?

 

Two were in a stingray. The last was a Z06. I’m 70 years old. All cars carefully broken in. In fact I never once launched the ZO6.

 

I didnt say anything about breaking it in properly or launching. I asked if you get into the upper RPMs when the oil is below 180 degrees.

I think you just answered my question by not recognizing what I'm talking about.

 

His issues were addressed through warranty, so obviously they did not find any evidence to show it was his doing.
Perhaps if you checked your own insecurity and ego, you wouldn't jump down the throat of every person who has voiced their issues.

The man is 70 y/o and stated that he has followed break in procedure and doesn't abuse his rides.. take it at face value, rather than trying to feed your own narative.

 

I asked a specific question about usage in relation to engine operating temperature. The response indicating a lack of awareness of waiting for the oil temp to reach 180 degrees before getting into upper RPMs, gave me insight into the possible cause for 3 blown engines from the same owner. And GM does not deny warranty claims based on usage of the vehicle.

Brw, what are you still doing on this forum, with no intentions of purchasing a C8/Z06?

 

You don't know if I may have even already bought and sold a Z and may be I'm waiting for '26s to go down in price... You have no clue, but you keep blurting out the junk that's running through your mind when someone dares curse on your precious ride..

Get over yourself or you will be forever stressed... this is all borderline sad/comical.

 

I don't own a Stingray, which is what my post was about, but nice try. I asked a simple question, genuinely trying to get to the bottom of how a single owner has 3 engine failures when virtually everyone else has zero, and you decided to interject with off-topic nonsense.

I actually own a C8Z, as opposed to you whose purpose on these forums is to trash Corvettes and are a self-identifying VW Porsche fanboy and Rennlist forum member. And that's very evident from your posts.

 

never buy a new model year 1. I waited until 2025 for this reason.

 

No truth to that old ex-wives tale myth. Plenty of 1st year engines still running strong from all Corvette Generations. If that rumor were true we wouldn't be seeing DCT failures and problems into the 7th year.

 

And it seems my issues aren't over even after my engine replacement. Driven a little over 400 miles on the new engine and it started to sound a little off and feel sluggish. Engine note became less singing and more growling, no MIL or vibrations. When I get home, I decide to check the oil level, which I had not yet done since the replacement (yes, I know, should have checked at the dealer before I drove off. Hindsight 20/20, etc.). Following the procedure in the manual (coolant temp at 175F, engine idling), I just about had a heart attack. According to the dip stick, the oil level is a foot or more above the full mark. There was oil all the way to just a couple inches below the cap. I wiped the stick and rechecked about 3 more times, just to make sure I wasn't going crazy, and it was the same extremely high reading each time. And after letting the car cool and sit overnight, I checked without starting the car to confirm my suspicions: the oil level reads at the normal level, when off...

I'm furious right now, the car has gone through most of its break-in period with what must be almost double the correct amount of oil. I have no idea what possible wear or damage has been done. My dealer will be hearing from me later this morning, and I am not going to let them off the hook for this. All of my care following the engine break-in to the letter ruined by their complete incompetence.

Is there any chance that the engine has not been damaged or prematurely worn? I never saw smoke during the time I drove it, but something was definitely not right the last ~15 miles.