07 cobalt temp. Fluctuates from 197 to 215. Random. Cools down at high speeds or with AC. On..

Asked by Apr 24, 2015 at 01:51 PM about the 2007 Chevrolet Cobalt

Question type: Maintenance & Repair

3 Answers

45

That sounds normal. The temp sensor should turn the fans on at about 212 and cool it to 190 then it rises and fan turns on. when A/C is on there is a fan that runs all the time, on the highway there is air moving across the radiator and engine so it would cool it doen

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12,165

The above answer is good. Also it may indicate the thermostat may be on it's last leg. When did you last check the level in the cooking system? Make sure it is filled correctly and the correct amount of antifreeze is in there. Also after 7 years, it just may be time to change the butter flies and June Bugs that gum up the radiator. Use a hose and spray the radiator then a soft brush to remove the bugs and keep the air flowing through it.

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95

My 08 Cobalt temp runs between 192-215 as well and from what I was told, with these type of EcoTech engines it is normal.

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