Hopefully GM will get these issues fixed soon enough.

 

Thought I'd give an update on my overheat situation quoted below.

The dealership called me back and told me that a "quick disconnect" coupling on the water pump failed and no longer will hold coolant. They are ordering a new pump and connect.
I asked if the new connect will fail just like the last - they didn't have an answer to that.

Some more info on the incident:
Interesting that there was no indicator on the dash of low coolant. First indication I had of a problem was the sound of the engine fans going nuts full bore and the rising oil and coolant temp.
At first the car instructed me to idle the engine (I had already pulled over at this time). I did so but the temp kept rising. So I turned the motor off but left accessories running so I could watch dash. The fans kept running and the temps kept rising (no idea how much coolant I had left in the car at this time. Oil temp kept rising too.
Eventually both hit the max side of the gauges. I think I saw oil temp at 297 degrees. Eventually the right side info panel popped up a message saying my oil was now at 0% and needed to be replaced. (Note - it wasn't low or empty).
I told the tech that and directed them to change the oil.
I also asked them the power wash the bay and belly pans of all coolant so I'm not smelling coolant baking for the rest of my ownership (car has 512 miles).

The service manager told me that in order to replace the pump they need to drop the engine so they will be able to clean the inside. We'll see how well they do that.

I just hope nothing warped or coked internally during this heat episode. We will see.

 

An interesting side note. I asked if I was the first 2020 they had in for service, and the service manager said no they had two previous, both valve spring issues. I'm right in the window for that build timeframe issue, so maybe I have another service trip awaiting me in my future. At least mine wasn't the first 2020 their tech got to work on....

 

Hope it all goes well guy, best of luck to you.

 

Did you lose all the coolant? My upper radiator hose came off.

 

I was still getting a temp reading so I don't think it ALL dumped. I don't know where this "quick detach coupler to the water pump" that failed is exactly located on the engine, how high it is, so when it went how much coolant was still lower than that spot. I do know it was NOT cooling the engine even at idle.

Really trying not to dwell on what possible block/head/ring/etc damage or heat warping may have occurred.
My plan is to get it back from the dealer and run it like a scalded ape. If it's going to present problems I want them showing up right away.

 

Back in the late 60's I saw my Dad run his new 1968 Chrysler Newport Custom ( with a 330 HP Magnum 383 and 200 miles on the ODO) until it seized and destroyed the engine, after it lost all oil pressure. He did this to avoid a dealer rebuild/patch job, worried about the damage done by the extreme heat.

 

Have you figured out a way to fix that yet? I cant figure how to get to those water spots.....frustrating.

 

Have you figured out a way to fix that yet? I cant figure how to get to those water spots.....frustrating.

 

Fix what?

 

Please help!
Hey! I just joined because I need help with my dads c8 corvette.
the car wont open the rear trunk. I've tried with the car key, and from the inside buttom, but the trunk wont open and the lights flashes like the usually do.
the front trunk/ frunk do work perfectly.
I dont know what to do. the only way I able to open the trunk is by taking of the license plate off and using the physical car key to open the trunk manually.
does any of you know what might be happening with the car?
Help, please!

 

How long has the car been sitting ? Have you pushed the rear trunk button on the back of the car? Is the battery low? Start the car if able and let it warm a minute, see if it opens then.

 

Also check manual, do you have the car in valet mode?

 

hey Grey, thanks for the quick response.
when I press the rear trunk button the lights of the car flashes, but it does not open, and we have used the car regularly, but everything happen right after we washed the car about 2 days ago.

 

Pressure washer by chance? Try the rear key behind plate. Plate has to be removed to access it.

 

It was hand washed with a regular water hoes pressure.
yes, thats how we have been doing it to open it. we take the licenses plate off to open the rear trunk, but we want to be able to open the trunk the way it is suppose to work.

 

Warranty time buddy. Call your dealer of choice.

 

I would find this quite irritating if it happened to me. I'd take it to the dealer and drive it right up his service bay.

 

how does a new transmission go bad . I'm worried now about buying this car

 

Not trying to minimize your issue but with all the C8 DCTs out there this is the first I heard of an issue. Forums like this tend to make issues bigger than they are. Id prefer a new tranny than have a dealer tech take it apart.

Has anyone head of this happening before?

You will be fine and on the road soon embarrassing hellcats!