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post #1 of 13 (permalink) Old 03-27-2015, 07:14 PM Thread Starter
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what is the overheating temp?

This may sound like a dumb question to some of you.. But what temperature on cobalts is overheating ?
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post #2 of 13 (permalink) Old 03-28-2015, 07:18 AM
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The fans will kick on low around 217-223, and then high at 230. I wouldn't worry at all until you start to exceed temperatures over 240+

---------- Post added at 08:18 AM ---------- Previous post was at 08:16 AM ----------

Coby will know more about it than I do though.

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post #3 of 13 (permalink) Old 03-28-2015, 07:27 AM
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Boiling point for the antifreeze is 265F if that helps at all.. what Temps are you running that you are worrying about overheating anyways?

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post #4 of 13 (permalink) Old 03-28-2015, 12:09 PM
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Here are the specifications.
The ECM commands Low Speed Fans ON under the following conditions:

• Engine coolant temperature (ECT) exceeds approximately 106C (223F).

• A/C refrigerant pressure exceeds 1 310 kPa (190 psi).

• After the vehicle is shut off, the ECT at key-off is greater than 140C (284F) and system voltage is more than 12 volts. The fans will stay on for approximately 3 minutes.

The ECM commands High Speed Fans ON under the following conditions:

• ECT reaches 110C (230F).

• A/C refrigerant pressure exceeds 1 655 kPa (240 psi).

• When certain DTCs set

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post #5 of 13 (permalink) Old 03-28-2015, 01:22 PM
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No dummy light on Cobalts?

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post #6 of 13 (permalink) Old 03-28-2015, 02:55 PM
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It might pop a warning up in the dic but I don't think it has an actual light

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post #7 of 13 (permalink) Old 03-28-2015, 03:24 PM
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I've hit 239 with mine. I think I read somewhere that the light comes on at 240. It was over 100 degrees when I was keeping up with traffic and going around trucks at 80 MPH up hill on our way to Vegas from Phoenix. I was ignoring the "Turn A/C off" signs too.
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post #8 of 13 (permalink) Old 03-28-2015, 04:37 PM
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I've hit high 230s at the road track. I'm concerned enough that I'm currently installing a front mount oil cooler. My main worry is the hotter the oil gets the less it lubricates as it becomes like water...

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post #9 of 13 (permalink) Old 03-28-2015, 04:46 PM
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but your car is also a little more than just a regular everyday driver haha

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post #10 of 13 (permalink) Old 03-28-2015, 05:28 PM Thread Starter
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I havent hit over 220 ... I just wanted to know cuz i wasnt really sure what the overheating temperature was on these cars... Its my first cobalt. I wanna be sure to take care of this car as much as possible. Its a good car. Just like alot of other people i kinda panicked once i saw hitting the 200's till i heard the fan come on at 217. But thanks for the input
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