@ KalanC7

My assumptions have been validated as I got my car back with a new motor and this was at the top of the repair order. Check my engine blown thread http://www.stingrayforums.com/forum/stingray-owners-logbook/12929-engine-failure-report-thread-2.html for pics of the melted knock sensors I would check to see on yours how hot your motor got if your concerned about damaged

 

Wow. Looks like you ran it hot. You're duplicate on the engine failure thread.

 

Same overheating issue here. Just did a 5 hour trip from Vegas to Yuma. Overheated. Temp gauge had a pegged temp needle. Got about 4 warning messages. So I stopped, about 80 miles from Yuma. The car released fluid through the overflow. Waited about five minutes with the hood up, and continued on. No overheating or anything, except: oil change service message came on. Oil life remaining had gone from 42% to 0% all at once. At Fisher Chevy in Yuma right now. At least I have a free rental car. Will report findings. 2014 A6 with about 16,000 miles.

 

Same overheating issue here. Just did a 5 hour trip from Vegas to Yuma. Overheated. Temp gauge had a pegged temp needle. Got about 4 warning messages. So I stopped, about 80 miles from Yuma. The car released fluid through the overflow. Waited about five minutes with the hood up, and continued on. No overheating or anything, except: oil change service message came on. Oil life remaining had gone from 42% to 0% all at once. At Fisher Chevy in Yuma right now. At least I have a free rental car. Will report findings. 2014 A8 with about 16,000 miles.

Sorry to read of the issues you experienced. Very interested in what they find. By the way, I am pretty sure you have an A6 not and A8 if yours is a 2014 C7.

 

Same overheating issue here. Just did a 5 hour trip from Vegas to Yuma. Overheated. Temp gauge had a pegged temp needle. Got about 4 warning messages. So I stopped, about 80 miles from Yuma. The car released fluid through the overflow. Waited about five minutes with the hood up, and continued on. No overheating or anything, except: oil change service message came on. Oil life remaining had gone from 42% to 0% all at once. At Fisher Chevy in Yuma right now. At least I have a free rental car. Will report findings. 2014 A8 with about 16,000 miles.

I had a similar problem about 9 months ago with my '15 M7 base Stingray at about 6,000 miles. The dealer could find nothing wrong. He did change the oil because my oil life also immediately went to zero. I think the fan failed to come on. I have had no problems since with the coolant usually running at 190 degrees.

 

Sorry to hear about your significant issues. Hope there are quickly resolved. Have you learned anything about its oil level?

Thanks for getting back to us when you know more.

 

Back from Fisher Chevrolet. No codes; no underlying causes found. They think that maybe the thermostat got stuck. They were going to replace it, but did not have one in stock. Driving back from Yuma, I now think that it is the battery. Many weird things were happening, like the center stack rebooting and the steering wheel radio controls not working, as well as the battery gauge needle not pointing where it is supposed to be pointing.

FYI, got an oil change and two quarts of coolant added. Yes, jsvette, I have a 2014 with an A6 (not A8) with 16,500 miles. It's two years and three months old.

 

Wow. No battery problems!

The overheating was caused by a misshapen surge tank cap. They changed the whole thing:
4031280 Radiator Surge tank replacement

The weird stuff going on with the infotainment screens and stuff? Reflash:
2880178 PI1101 2014 Corvette reprogram BCM, HVAC, Radio, IPC
16953 …per Si doc 3767523

I need to take another long road trip!

 

Hello All, new to the forum as well. My 2014 Stingray just did the same thing as I have read a few mention here, my wife was on Interstate when construction slowed traffic to a crawl for about 45 minutes. Have had car for about 6 months, has always ran around 220 degrees. It started going up and pegged out at 260, steam started coming from under hood. She pulled off the road, waited for about 30 minutes for traffic to die down and car to cool. Started back driving normal speed and no other problem. She drove it back home 3 days later ( 75 mile trip) also with no issues. It has been at dealer now for 3 days and they can find nothing wrong. The car got hot enough for the warning lights to come on and start" yelling" at her. Lol, her words! Dealer says coolant is full, no codes and fans are coming on. I asked that they inspect the cooling fan plug for corrosion and they stated there was none. They say there is no GM Bulletins for this issue, but I have read several exact problems on this forum. It is an auto, non Z51, no front plate, no bra, almost 27,000 miles. I hate to let her drive and chance her getting stranded somewhere. Any ideas? Thanks All!!

 

Any ideas?

You've covered the obvious items, including fan operation.

I'd go ahead and replace the coolant and hope the overheating doesn't recur.

 

Welcome Tony and we are sorry to hear about your wife's very unnerving experience. While there has been some overheating on a very small percentage of C7's, most of that has been in either tracking the car, or I know of a few folks stuck in stop-n-go when it was over 100 degrees. Doubt that at this time of the year, even if she was stuck for hours in stop-in-go, your temps have been any where near 100 degrees, let alone even the high 80's.

As one example, we were stuck in our '15 Z06 in horrible stop-n-go for an hour in 90 degree weather and while the temp rose to 235 , not higher.

Clearly something happened. My only idea, highly improbable, is that she had a plastic bag stuck in her radiator, but that is so improbable that it first got stuck then also worked its way back out of the grille. Hopefully someone else on the forum has a better idea of what could have happened.

Perhaps you did not find some ideas in this thread being useful, most specifcally a stuck thermostat??? That could explain a "one and done."


Welcome to StingRay Forums and we hope someone can give you some help, for I too would be concerned if that happened to my wife, i.e., might it happen again.

 

Welcome to our forum TonyElliott. It is unusual that warning lights came on (and no idea what 'yelling' at her refers to) and that the dealer service found no codes at all. I think John may have hit on something with the plastic bag temporarily blocking air flow. Any chance that your car had been washed or through a car wash before the event- often water from a car wash will result in steam coming from the hood vent. Hopefully it was a one time occurrence.

 

Exact thing happened to me, except I had to slow on the freeway due to an accident ahead, while my wife and I were on vacation. The temp needle went to the max, the warning light came on, steam came out, a warning chime sounded, and I lost coolant via the overflow. I got multiple messages in the DIC, including "change oil" (previously it was above 50%). I always watch my gauges and made it to the right lane when I first noticed the temperature rising above my normal 190 degrees. I had the car towed to a dealer with the help of OnStar. The dealer found nothing wrong but he did change the oil and gave me an almost-new Impala to drive in the meantime. All covered under warranty. My thinking is the engine fan failed to come on but that was not an issue while I was driving at freeway speed - plenty of air and low RPM in 7th gear on my manual transmission. I have no front license plate. On the positive side that was several years and 10,000+ miles ago with zero reoccurrence. I have a '15 base M7 Stingray and that was my only problem.

 

Hi Jeff, the "yelling" was the warning bells going off, I could hear them over her cell, there was a message that came up saying ENGINE OVERHEATING IDLE ENGINE. She was in traffic for about an hour before it started running hot. And no car wash that day. She left town and had driven about 40 miles before getting into the construction traffic. My background is Dealer service manager and have owned a transmission shop for about 10 years. I know as she was sitting in traffic with no air running over the radiator, the most logical explanation is that the cooling fan was not coming on. After sitting on the side of the road for about 30 minutes it had cooled down and the traffic had dispersed so she was able to run at highway speeds with no further problems. The dealer checked the fan and the plug and all seems fine to them. I do not like unexplained occurrences like that, I'm thinking there was no codes because the computer sent the signal to cut the fan on, but it didn't cut on. Since the fan is working now, that rules out mechanical failure of the fan itself and leaves an intermittent wiring problem....the most dreaded word in automotive repair " intermittent"...ugh...

 

Planning a road trip to Death Valley next month, any suggestions to help lower temperature, my 2015 7M runs 200-220 in the summer, in the Bay Area...

 

Remove the front license plate. This solved my "sometimes 220°" operation. Haven't exceeded 180° since.

 

Pack water for you and your passenger to drink, not to worry, do not let your fuel run low (or if you do expect to pay and extra $1.50+/gallon at the one gas station we drove by), and drive way. We took our Z06 there in 90+ degree weather, "exercised its spirits" in safe places, and our temp did not go about 225.

 

I was in stop-and-slow traffic (not even stop-and-go) on I-80 from Emeryville to Berkeley, and experienced severe heating with Caroline's temperature gauges shooting up markedly. I don't remember exactly how high they got. Nevertheless, I did not experience any steam coming out. Also, no warning chimes were sounded.

The key, even in hot ambient temperatures, is to keep air flowing through the radiator. In Death Valley you can keep the car moving without concern for traffic jams. I wouldn't worry about it.

 

Last summer we sat in traffic in 95 degree weather. Knowing that others have had problems every time the traffic came to a stop I popped the m7 out of gear and raised the RPM above 1000. This seemed to help, the engine temp would drop a little.

 

Tony, welcome aboard and sorry to read about the Mrs. experience. I know exactly what you were talking about when she said the vehicle was yelling at her :nevreness: Hopefully it will never happen again and you both continue to wheel your C7 masterpiece around SC Gremlin Free.

SF
Rick

 

Thanks for the additional info TonyElliott. Hopefully it won't fall under the intermittent unsolved issues for you and her! nthego:

 

I had the same overheating issue last summer. 2014 Z51 3LT A6. Took it to the dealership. According to my Service Adviser it was a known issue and there is a service bulletin. They replaced my coolant manifold. Problem fixed.

 

Very valuable post "Beast!" Thank you for posting.

 

Any experience with Novistrech on heat or dirt i.e. acting as sandpaper? I know they should be washed

 

Yes, as elegant mentioned, I had around 20,000 NoviStretch miles on my Stingray before I lost her in a flood. These miles included a trip through Death Valley at 120 and the temp gauge never budged from normal. With regard to any potential paint marring issues, the only recommendation I have is to not use NoviStretch while on a highway in the rain. Small road debris tends to find its way into the lower corners of the bra near the wheels when it's raining for some reason. That said, I never had any paint scuffs, etc., even when using it in the rain. 100% trouble free experience for me.

 

No issues with 10,000 miles on mine, though it is always clean when applied and put onto a totally clean car. When removed, dirt, bugs, craps, etc, a microfiber with a detailer, and it cleans up beautifully -- with zero evidence of any surface abrasion as a consequence of it being on. Once it was one for 2,400 miles straight, again with no issues.

Jagamajajaran had a Novistretch on Dual Velocity for around 20,000 miles. Hopefully we will comment below.

 

Gentleman thank you I'll be ordering mine today. My plans are limited use on road trips. Thanks again!

 

Ok I posted on 3/17/17 that they replaced my coolant manifold last summer (2016), problem fixed. Apparently, NOT! Overheated today and had to tow it back to where it was originally "fixed." Less than a year and not fixed. 2014 Z51 A6 21,000 miles very well taken care of. This is not acceptable. Not to mention the dealership said "to take an Uber home". Really? You have got to be kidding me! I can't wait to hear what the dealership has to say tomorrow.

Cheverolet Customer Care are you seeing this?

 

If you would like our GM Customer Care group to intervene you will need to drop them a PM at ChevroletCustomerCare, include your VIN, details of the issues and the dealer name.

 

Thanks, I appreciate the help. I am just a little upset. I will wait overnight until I can cool down and hear what the dealership has to say.

 

Hope it is quickly and easily solved, that it was caused by something simple like a partially stuck thermostat.