3rd time at the dealership because of the car overheating. At least I was in town and not on a mini vacation. Let's see what they say?

 

What year Corvette and is it auto?

 

What did they say or do for the prior two occurrences.

 

How hot did your car get?

 

2014 automatic

 

At Paradise Chev in Temecula, couldn't find anything and it wouldn't do it when they had it for 3 days each time.

 

buried the needle 260+
usually runs steady at 220

 

I have a C7 16 base a8 and live in Las Vegas. We run 110 doing the day. My c7 runs 190 will sometime go to 200 in stop and go but never seen it go hotter. I have even let it idle on a super hot day while I talked to someone for 20 min's or so with the air on When I came back to car still did not reach 200. This surprised me because my prior vette a c5 zo6 would been overheated. Maybe 16's run cooler

 

Dealer plan is to put in a new thermostat. My plan is to unload it at the end of September. Undoubtedly it's not good for the motor. I purchased the 100 thousand mile bumper to bumper but that doesn't seem to cover the costs.
This is my 4th Vett 1st time I've ever had this problem.

 

Same exact thing happens to me on my 2014 automatic has happened to me a few times needle gets buried and I pull over and few minutes later it goes right back to normal last couple of times it happened was about 75 degrees out pulled up to red light than dash lights up and goes crazy weird thing is when it happens I can see my headlights reflecting on the car in front of me and the passenger DRL flashes like crazy when it's happening brought it to dealer they said everything's fine

 

Just the passenger side DRL? Wow, that sounds like a problem in the body control module (or whatever they call it in a C7), not in the cooling system at all.

 

My 2014 M7 over heated twice. Dealer could not find the issue or replicate the issue. Then they changed the thermostat and it has been fine ever since.

 

Reason I asked the year and type of transmission, was I experienced the same problem a few weeks ago running the on the Corvette Track at the NCM. I asked about this and was told the info that I am stating in the reply.... I have a 2014 Automatic....

Maybe somebody can expand and verify this information, but what I was explained by a Chevrolet Engineer that was on the track was the 2014 Auto has a tendency to run hot, and it is known issue by GM and Chevrolet, and they took corrective action for the 2015 models. Appears they increased the size of the cooling tube in 2015 and also installed an additional Transmission cooling fan in 2015 and on. If this is the case, I strongly believe that Chevrolet should recall the 2014, automatics, and do the modifications needed to increase the diameter of the cooling lines, and install the additional fan at now cost to the owner. Somebody else want to verify this information please.....

 

The only item in the cooling system that would cause intermittent overheating is the thermostat. (fails to open, sticks closed)

 

Mine is at the dealer for the 2nd time right now for random overheating. They don't want to due anything since they cannot duplicate and I even have a video of it that my Wife took from the passenger seat to prove it is happening GM service is just plain horrible when compared to it competitors. Weird thing is every time it has happened I can tell the fan is not turning on. According to GM service if they cannot duplicate then did not happen and tough luck hope it doesn't happen again. After 13 Corvettes in 18 years this is likely my last just due to such poor service departments.

 

over heated twice on mine took pics of it at random times when at idle, took it to the dealership said nothing was wrong,




told next time it does it there towing it in at there cost.

 

I sympathize with those of you who've had a problem with your car that the service department couldn't see or replicate. I also sympathize with the service departments who're tasked with diagnosing a problem they can't see or replicate. I was a repair tech working on all kinds of electronic and mechanical systems in the business world.

I'd suggest being patient with the service techs. They're not dummies, well most of the aren't, and they do want to help. What would you have them do if they can't see the problem in question? Start ripping stuff out looking for the needle in the haystack? Sure, it may seem obvious to try this or that but many times a problem can be created by tearing stuff out without probable cause. Want them to try the "shotgun" approach? Replace anything that might possibly be causing the problem? Its expensive throwing parts at a problem hoping to hit it by accident. I'd rather not have anyone tearing into my car without a strong feeling they're on the right track.

To help, log as much information as possible when an event occurs. Pictures and videos help. Try discussing the problem with the repair tech, sometimes the light bulb will come on in someone's head through thoughtful discussion. I've solved some dilemmas by explaining to my customers how a system works, and how it can fail. It helps to break things down and think deeply.

Be patient and courteous. Don't risk turning a tech off emotionally by ranting or belittling their effort or the service dept. in general. I wasn't all that excited to help someone who's ripping me a new one.

 

Well in my 50 years of car ownership overheating is either bad thermostat ---cooling leakage or bad water pump !!! Wayne

 

Just as likely nowadays to be the failure of the cooling fan to come on when it's supposed to.

 

There were at least three 2014 owners who experienced this in the past and the problem was due to the expansion tank opening being slightly oval instead of perfectly round so the cap doesn't always seal properly. Under the right (or I guess wrong) conditions this allowed air into the cooling system causing a random overheat. Normally you would suspect either the electric fan not running (easy to check) or a stuck thermostat but there were at least some C7s which received this defective expansion tank so it is worth checking.