Help! - 2008 Chevy Cobalt 2.2L

[karmaiko]

Hello,


I need some help if someone could, please. Here's the situation.


 


I drive a 2008 Cobalt, 2.2 L ecotec engine. It has about 93,000 km on it. I have intermediate vehicle skills, but would not consider myself an expert by any means (which is why I am here!).


 


Last Saturday (August 2nd) my MIL came on and the coolant fan fuse had blown. I replaced the fuse and picked up a couple extra. For a few days it was good, then it came on again and the  fuse had blown. It blew when the coolant temp was in the 95-100 range (normal operating temperature is 89 degrees C). I replaced it again and this time also replaced the fan relay (number 2572). The problem persisted, with the coolant running hot. This past Saturday (August 9th) I replaced the rad fan with a brand new one from dealer.


 


Today my coolant hit 100 degrees after I got off the highway, however now the fuse is not blowing. When I put the ignition key in first stop the MIL comes on, but it goes out when I start the vehicle.


 


Thoughts? Any input or feedback is appreciated!


 


Thank you.


 


edit - I hope this is in the right subforum.

 

[Brad B]

You may have already checked, but be sure one of your radiator hoses isn't collapsing under pressure when hot. This is fairly common for old hoses. This, of course, impedes the flow of coolant and things get hot fast. While curved hoses are the most likely culprit I've seen it on straight hoses, too. If your hoses are old just replace them to remove that variable. A pain to do, but cheap insurance.