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Old Apr 3, 2023 | 08:28 AM
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Default C5 cooling temperature

Hi to all..
i saw that during the ride in the highway, the cooling temperature is about 200F 204F (93° 95°)

But during the ride in the city (traffic lights, queue etc etc) the temperature rise till 228F 230F (108° 110°), to decrease till 217F (103°)

Is it normal?

In my previous car (Subaru WRX) the temperature in every drive conditions, never rised over 200F.

If ithe range work temperature is normal for the Corvette, is a good idea install a switch to manually start the motor fan?
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Old Apr 3, 2023 | 10:39 AM
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Ok thanks!
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Old Apr 3, 2023 | 10:52 AM
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it is normal because that temperature is when the cooling fan comes on. You can have computer tune to change it, or just turn on air conditioning and the fan will run all the time.
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Old Apr 3, 2023 | 11:03 AM
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Originally Posted by Mauri_C5
Hi to all..
i saw that during the ride in the highway, the cooling temperature is about 200F 204F (93° 95°)

But during the ride in the city (traffic lights, queue etc etc) the temperature rise till 228F 230F (108° 110°), to decrease till 217F (103°)

Is it normal?

In my previous car (Subaru WRX) the temperature in every drive conditions, never rised over 200F.

If ithe range work temperature is normal for the Corvette, is a good idea install a switch to manually start the motor fan?
As long it comes down when u get out of traffic ist fine but mine never got that hot. in traffic and that's sitting in traffic for hrs. But every car is a little bit different.
And dont run ur a/c because temps will even go high, or was ur a./c on??

https://www.corvetteforum.com/forums...-ac-is-on.html
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Old Apr 3, 2023 | 11:10 AM
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Hi,
The AC was OFF. Here in Italy at the moment the outside temperature are about 18°
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Old Apr 3, 2023 | 11:13 AM
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Originally Posted by Mauri_C5
Hi,
The AC was OFF. Here in Italy at the moment the outside temperature are about 18°
Boy that cold how is it overheating
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Old Apr 3, 2023 | 11:14 AM
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LOL i know ii know.
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Old Apr 3, 2023 | 11:16 AM
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Read the thread and there's ton out there u definitely have a problem

Im not speaking for anybody, thats not acceptable for me
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Old Apr 3, 2023 | 11:17 AM
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We here don't have your street and ampty spaces.... Here where i live (near Milano and Varese) during the weekend the traffic is orrible!!!!!
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Old Apr 3, 2023 | 11:19 AM
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Originally Posted by Mauri_C5
We here don't have your street and ampty spaces.... Here where i live (near Milano and Varese) during the weekend the traffic is orrible!!!!!
Did this just come out of the blue? did u just buy this car??
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Old Apr 3, 2023 | 11:21 AM
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install a switch to manually start the motor fan? there is a vendor on here that makes one just for this issue forgot there namee
Mauri_C5 is online now Report Post
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Old Apr 3, 2023 | 11:30 AM
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I bought the car 3 months ago. and i always saw this problem. Next week il' go to the service to a full check of the car.
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Old Apr 3, 2023 | 11:34 AM
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Originally Posted by Mauri_C5
I bought the car 3 months ago. and i always saw this problem. Next week il' go to the service to a full check of the car.
Sound good, i bet ur a/c condenser to radiator have some animals living in there clogging the flow f air.
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Old Apr 3, 2023 | 01:00 PM
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This is normal when sitting in traffic on a hot day. The high fans dont come on until 236F.
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Old Apr 3, 2023 | 03:33 PM
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Sounds normal to me.

I'm mostly stock and ECS advised me (and tuned me) to use a 160F T-Stat.
It now runs 172 on a really cold day (25F ambient) up to 180 on a hot summer day. In traffic on a hot summer day I might see 184 max
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Old Apr 3, 2023 | 06:23 PM
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C5s are engineered to run about 217°-236° in city, stoplight to stoplight traffic. It could be 18° BELOW ZERO, and if no air is moving thru the radiator, it will still get to those temps. They aren't what we may desire for performance work, but they are perfectly normal for a non-tuned C5.
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Old Apr 8, 2023 | 04:28 PM
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Originally Posted by 666lisa
Boy that cold how is it overheating
Due to OP being from Italy, I would assume that his temperature reading of 18 is Centigrade....about 65 Fahrenheit.
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Old Apr 8, 2023 | 06:43 PM
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Originally Posted by 666lisa
As long it comes down when u get out of traffic ist fine but mine never got that hot. in traffic and that's sitting in traffic for hrs. But every car is a little bit different.
And dont run ur a/c because temps will even go high, or was ur a./c on??

https://www.corvetteforum.com/forums...-ac-is-on.html
A/C does not always cause coolant temps to rise in around town/city driving. This is because A/C activates the fans.
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Old Apr 8, 2023 | 06:46 PM
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Check and clean out any debris in the radiator and hose out dirt. Remove the radiator fluid cap and warm the engine to at least 180F and watch for the level of fluid to change as the thermostat opens. Add fluid if it drops. Replace the cap and allow the engine to cool. It will suck fluid from the overflow into the system as it cools if there's air in the system as air will expand and contract more than fluid. Run the car and see if there's an improvement. If not then I would suspect a sticking thermostat not opening fully. I do NOT recommend a 160 stat as the engine's operating temp is 180f-190f and the stock stat is I think 192F? There's a reason for that ie: correct operating temp, piston ring expansion, emissions etc. Also make sure to use a 50/50 water to antifreeze ratio as water boils at around 212F and antifreeze raises the boiling point. Your numbers seem reasonable of a approx. 25F-28F change between highway and stop and go traffic. You're really only around 20F-25F over where I'd suspect you'd be on a 65F day so it's not a huge deal.

Last edited by whatyacallit; Apr 9, 2023 at 12:01 PM.
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Old Apr 9, 2023 | 06:26 PM
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Originally Posted by NealinAZ
Due to OP being from Italy, I would assume that his temperature reading of 18 is Centigrade....about 65 Fahrenheit.
I guess u missed my 2nd quotes. Look at the next quote i made. Look at quote #7

Last edited by 666lisa; Apr 9, 2023 at 06:33 PM.
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