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I own a 2006 Chevy Cobalt and I've come to a final decision that the car is a piece of junk and totally hate it. The coolant temperature goes up to 255 and I checked for leaks but found none, I changed the thermostat and the coolant temp sensor but in vain. I've spent hundreds of dollars trying to figure out a solution for this stupid car. The engine coolant fan does not turn on inspite of reaching high temperatures. The fan works when I turn on the A/C. I'm just fed up with the car and totally hate it. What do you recommend me do?
 

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GET A TURBOcharged Cobalt

---------- Post added at 10:44 AM ---------- Previous post was at 10:44 AM ----------

lol..but really..the newer models hardly seem to have problems
 

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I don't have anymore money to spend on this car or a new car. Is there a specific coolant that one needs to use for a chevy cobalt?
 

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Yes I did. They seem to be just fine. and thanks for the replies all. I'll still on my quest to find a solution.
 

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I heard Dexcool has certain disadvantages and GM lawsuits and blame's on dexcool? any opinions on that?
 

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not sure.. but i used a 50 50 mix of dexcool from auto zone.. and its weird cuz my engine light was on and said i had an issue with coolant that it wouldnt heat up enough and recommended that.. well it still wont heat up.. the highest ive seen is 180ish and i usually run at like 145-150.. its like the same problem just in reverse?.. i have an 05.. =(
 

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wow having similiar probs with coolant temp sensor. my temp gauge now reads between 140-170 and kicked my engine light on the guy at auto zone put in on comp and it said coolant temp sensor reading too low so he said i need a new sensor. its only 12.99 but dont know how to change it. in the summer my temp runs from 190-220. I have been lucky that i havent had more serious issues like the sky high temps damn thats nascar temps. hope you get it fied man
 

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I own a 2006 Chevy Cobalt and I've come to a final decision that the car is a piece of junk and totally hate it. The coolant temperature goes up to 255 and I checked for leaks but found none, I changed the thermostat and the coolant temp sensor but in vain. I've spent hundreds of dollars trying to figure out a solution for this stupid car. The engine coolant fan does not turn on inspite of reaching high temperatures. The fan works when I turn on the A/C. I'm just fed up with the car and totally hate it. What do you recommend me do?
It can only be a few things since you've ruled out the fan motor/wiring and temp sensor...replace the relay even though you think it's good and there's also a fuse in the engine bay fuse box.
 

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wow having similiar probs with coolant temp sensor. my temp gauge now reads between 140-170 and kicked my engine light on the guy at auto zone put in on comp and it said coolant temp sensor reading too low so he said i need a new sensor. its only 12.99 but dont know how to change it. in the summer my temp runs from 190-220. I have been lucky that i havent had more serious issues like the sky high temps damn thats nascar temps. hope you get it fied man
yeah, mine did the same thing.. chec engine light and all.. but if its runnin cold wouldnt it be just coolant? like.. im going to water mine down a little today to see if it kicks up the temp at all.. cause the guy at autozone said it'll make the check engine light go off if it fixes the problem.. like.. abviously its reading some sort of temp ya know? hahah im just so confused with this.. ive never had this sort of problem before ! hahah but its been going on since i got the car back in july basically..
 

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New Dexcool doesn't have any of the issues the old stuff is associated with.
 

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I own a 2006 Chevy Cobalt and I've come to a final decision that the car is a piece of junk and totally hate it. The coolant temperature goes up to 255 and I checked for leaks but found none, I changed the thermostat and the coolant temp sensor but in vain. I've spent hundreds of dollars trying to figure out a solution for this stupid car. The engine coolant fan does not turn on inspite of reaching high temperatures. The fan works when I turn on the A/C. I'm just fed up with the car and totally hate it. What do you recommend me do?
I believe I have a post floating around here on what happened to my radiator fan, and how much the dealer stole from me for installation, but I got to keep the old on, and a bag got in it.

After getting the plastic bag remains out, I noticed the brushes and the resistor (which is inside the fan) were shot. It'd only work on the one setting.

My guess is since yours is an older model there are bugs that weren't worked out in assembly and manufacturing and you have yourself a crapped out rad fan if it only turns on with the AC...

I'd take it up to GM bite the $50-$100 bullet and have it diagnosed right, then you will know for sure what is wrong.
 
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