I have a 2019 Grand Sport, approximately 68,000 miles, 7-speed manual, Z07 package, with 'Rising Engine Temperature'.

The radiator has not boiled over, but over the past several months, the engine temperature rises. The temperature then goes down as the vehicle is moving. How much the engine temperature goes down is dependent on outside air temperature & the type of driving.

Historically, the engine temperature is 183, maybe 185 but it had not varied. It didn't change depending on stop & go driving, highway driving, hard acceleration or even high temperatures in the Arizona desert.

Engine temperature varies how high, I have seen a high of 214 & how fast it rises. It depends on the outside air temperature, the colder the less the temperature rises. The oil temperature rises as well, following the engine temperature by 2-3 degrees, plus or minus.

I can reduce the engine temperature by using 4-cylinder mode.

I've had a drain, flush & fill on the radiator with no change.

I changed the thermostat to a 180 degree, no change, the temperature still rises.

I changed the Engine Temperature Sensor, no change, but the rise did seem to be slower & not as high.

I have had a Cold Air Intake installed, Corsa, which is when I noticed the issue.

Pretty much at a loss what the next step is.

 

Did you check all the connections that would require to be removed to install the air intake since this is when you started to have the issue?

 

ck fan operation ?

 

I concur with @ball-z Is the cooling fan operating? After the engine is warmed to operating temperature, the fan should be spinning with the car is parked.

 

I also have a 2019 GS. It came from the factory with a bad thermostat - it opened too low and I had the yellow tach "halo" going on and off in cool and cold weather. After replacing the thermostat with a stock AC Delco, the temp will warm to 176, the halo goes away, and temp stays above 180 F and can go as high as 210 F in summertime traffic. As soon as the car starts moving again the temp drops to 200 F or below. All normal. If the temperature doesn't change at all I would be concerned.

Ron

 

A thermostat with to low a temp can also cause issues. Use the OEM temp spec.

 

I second that. My issue was the cooling fan system sensed a fault because the thermostat was lazy to close and the systems didn't detect the normal operating engine temperature reaching within certain minutes expected from cold start.

The only way to get the fan to turn off was to disconnect the battery.

I changed the thermostat and the problem disappeared.

While not the original poster issue, I thought I'd share my experience.

 

Thanks to all. What is the GM spec on thermostat for the 2019 LT 1 GS M7?

 

https://parts.gmparts.com/product/ac...16983%2C158979

The problem is,,,, you will find anywhere from 150* to 212* that vendors are trying to sell you.

 

This is what I installed in my 2019 GS. Working OK for almost 4 years: GM# 12674634 AC Delco 15-11113 for 2019 GS.

(Strange - Link above says 15-11115 does NOT fit 2019 Corvette)

Ron

 

(Strange - Link above says 15-11115 does NOT fit 2019 Corvette)
True,,,,, Sorry, I was just trying to show him the GM parts site, as opposed to all of the after market websites.

Maybe this one.

https://parts.gmparts.com/product/gm...el=-&wheelId=1

 

AC Delco, Rock Auto, Amazon, and eBay all show AC Delco 15-11113 for 2019 GS.

Don't know how you got the wrong one.

Ron

 

I understand,,,,, read my last post.

 

The C8 in all models standard operating temp is 210-220'

 

My C7 2014, runs very consistent at 210*-220*, coolant temp.

 

stock thermostat is 195F. 214F isn't hot. The fan isn't programmed to come on until 220F. Seeing 220-230 with spirited driving is normal.

 

Yep I keep seeing that, but personally I don't like it. T-sat is 195 so why would I want the engine to constantly run at 220 or 25deg over the T-stat temp? Seems to me I'd want the fan to come on at maybe 205 or 210 and bring the temp back down to 195. Over the winter I plan to install the thicker oem rad and the 600watt fan to see how that does.

 

Are you looking at the analog gauge or the digital one on the DIC? I believe '14 only had an issue where the analog temp gauge reads 220 no matter what but when you look at the DIC it displays something different. Mine shows 195 on the DIC and 220 on the analog. It's been discussed on the forum. For me personally, I'm not going to worry unless I'm approaching the danger zone of 255-260 degrees.

 

220* is where it's supposed to be. 220* isn't to hot. Just because the thermostat is 195* doesn't mean the reading shouldn't 220*. It depends where the temp sensor is located. I know, there are at least two different temp sensors, maybe even three. As far as correct engine temp, there are issue with to low of temp and to high of temp.
My gauge doesn't read 220* no matter what. If I drive on a hot day or more aggressively it will be above 220* on cooler days it will settle just below 220*. I keep hearing the analogue gauge isn't accurate, not my experience.

 

C7s are a little more complex regarding temps, taking into account speed, rpm, and torque. Note that the below is the base values vs rpm and torque zones. Then there are modifiers that tailor desired coolant temps.

2019 fan programming....