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2006 Cobalt losing coolant and running rough

6 messages,  Last post on Jun 30, 2009 at 5:42 PM

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What is this discussion about? Chevrolet Cobalt, Auto Repair, Engine, Heating / Cooling

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#1 of 6 2006 Cobalt losing coolant and running rough by treehugger81 Apr 30, 2009 (10:05 am)
Hi we have a 2006 Chevy Cobalt. The engine is a 2.2 according to oil change records (hubby is gone and I know nothing about cars). It has around 56,000 miles on it. All of a sudden several things have went wrong with it. I don't know if they are all related or not since I know nothing about cars, but since they started happening around the same time I assumed they were. To start with we started losing coolant. My hubby keeps filling it up. There is no coolant in the oil and none visible on the ground. Then it started running really rough when starting up. The sound it is making sort of reminds me of when we had to change the oxygen sensors in our old van. Then just the other day we started hearing a noise under the passenger side. It sounds like water sloshing around in a tank whenever he has accelerated and then suddenly stops. The check engine light came on around the beginning of all this and whenever we had the mechanic hook it up it said it was a knock sensor. He changed that and a week later it still hasn't done any good. Our check engine light is no longer on, but it still sounds rough, is losing coolant, and the sloshing water sound is still there. If anyone could give me some helpful advice or suggestions it would be much appreciated. Thanks! Replies to this message: poncho167 (May 01, 2009 7:27 am) treehugger81 (May 01, 2009 8:21 am) poncho167 (May 08, 2009 7:04 am) frankrizzo965 (Jun 30, 2009 5:23 pm) and 1 more...
#2 of 6 Re: 2006 Cobalt losing coolant and running rough [treehugger81] by poncho167 May 01, 2009 (7:27 am)
Replying to: treehugger81 (Apr 30, 2009 10:05 am) You can probably get your trouble codes back by losing the gas cap. Then have it scanned at Autozone or someother place who will do it for free. Replies to this message: treehugger81 (May 01, 2009 8:21 am) poncho167 (May 08, 2009 7:04 am) frankrizzo965 (Jun 30, 2009 5:23 pm) treehugger81 (Jun 30, 2009 5:42 pm)
#3 of 6 Re: 2006 Cobalt losing coolant and running rough [poncho167] by treehugger81 May 01, 2009 (8:21 am)
Replying to: poncho167 (May 01, 2009 7:27 am) Okay let me get this straight......take the gas cap off and the codes will come back?!?! Never heard of that, but nice to know! Thanks! Replies to this message: poncho167 (May 08, 2009 7:04 am) frankrizzo965 (Jun 30, 2009 5:23 pm) treehugger81 (Jun 30, 2009 5:42 pm)
#4 of 6 Re: 2006 Cobalt losing coolant and running rough [treehugger81] by poncho167 May 08, 2009 (7:04 am)
Replying to: treehugger81 (May 01, 2009 8:21 am) By loosening the cap the computer will detect a lose of pressure in the fuel system thus giving a warning light. Dont take the cap off just loosen it. It usually will trigger a warning/code which could give other codes that available for reading.
#5 of 6 Re: 2006 Cobalt losing coolant and running rough [treehugger81] by frankrizzo965 Jun 30, 2009 (5:23 pm)
Replying to: treehugger81 (May 01, 2009 8:21 am) Tree Hugger...I also have an 06 Cobalt, and the EXACT same thing is happening...what did you find out? if you could let me know that would be AMAZING. Replies to this message: treehugger81 (Jun 30, 2009 5:42 pm)
#6 of 6 Re: 2006 Cobalt losing coolant and running rough [frankrizzo965] by treehugger81 Jun 30, 2009 (5:42 pm)
Replying to: frankrizzo965 (Jun 30, 2009 5:23 pm) Hey there.....our cobalt has been fixed now. It was in fact a blown head gasket. Sorry to be the one delivering the bad news. I sure hope if that is your problem you have a warranty. It was a costly little repair. We had a warranty but I know what our normal mechanic told us it would have ran if we hadn't gone to the dealership with warranty papers in hand. Email me if you have anymore questions. My email address (minus all the spaces) is Tamara 924 yahoo . com If you don't mind me asking how many miles does your cobalt have on it?

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