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Discussion Starter · #1 ·
My Wifey's '05 runs around 205° at times. Sometimes even higher. The '08 is running up to 217°. Is this normal? The only time they run 195° is in the Winter. They run cooler with the AC on but that is probably because the fan comes on with AC. What is the normal temp for these 2.2 engines?
 

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My '07 will usually run right around 176-196*.
 
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Discussion Starter · #3 ·
The Wifey says she hits 212° sometimes even in Winter. This is with a new thermostat and coolant flush.
 

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There's times your coolant Temps may rise above 210 for a number of reasons, as long as your Temps remain below 230 you shouldn't fear any damage.
If your coolant tank isn't low, I'd start with the factory refill procedure to purge any air from your coolant system and top off coolant levels if needed.
 

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I had to look it up, the cobalt cooling fans don't kick on until coolant reaches 223* Fahrenheit.
223* engages low, 230* engages high.
Mine kicks on at 190.
 

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Discussion Starter · #7 ·
I had to look it up, the cobalt cooling fans don't kick on until coolant reaches 223* Fahrenheit.
223* engages low, 230* engages high.
She gets scared when it goes above 200°. She either turns on the AC so the fan comes on- or the heat so it helps cool the engine. Either way I wonder why the 2.2 runs so hot. I at first thought the thermostat was bad so I went through the arduous job of replacing it only to get no change. Especially when aluminum engines are suppose to dissipate heat better than cast iron engines.
 

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My 09 will run to 20 5 to 215, For five or 10 minutes but usually 195 to 200


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She gets scared when it goes above 200°. She either turns on the AC so the fan comes on- or the heat so it helps cool the engine. Either way I wonder why the 2.2 runs so hot. I at first thought the thermostat was bad so I went through the arduous job of replacing it only to get no change. Especially when aluminum engines are suppose to dissipate heat better than cast iron engines.
They were designed to run hotter.
 

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Discussion Starter · #10 ·
They were designed to run hotter.
I did not know that. I am used to running at 195° like my Sunfire 2.2 does. These Ecotec engines have been pretty trouble free so I had no idea they like to run hot. That is a relief. My 4.0 Jeep runs at 210 all day and they say that is it's best operating temp too.
 

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Mine started running a little hot 196 changed thermostat no joy 63.00 radiator did the trick Amazon if your handy no big whoop
 

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Discussion Starter · #12 ·
What fun getting to that thermostat, eh? I suffered that job because it was running hot. No change, time wasted.
 

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Mine was sticking tested on stove in a pan of water after changing it also changed temp sender got the dreaded ——— which turned out to be a bad ground on the head just above the thermostat housing soldered it back up and good to go
 
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