Last post on Oct 13, 2010 at 5:44 PM
You are in the Chevrolet Cobalt
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Chevrolet Cobalt, Auto Repair, Engine, Heating / Cooling
#1 of 21 2006 Cobalt losing coolant and running rough
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!
#2 of 21 Re: 2006 Cobalt losing coolant and running rough [treehugger81]
May 01, 2009 (7:27 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.
#3 of 21 Re: 2006 Cobalt losing coolant and running rough [poncho167]
May 01, 2009 (8:21 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!
#4 of 21 Re: 2006 Cobalt losing coolant and running rough [treehugger81]
May 08, 2009 (7:04 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 21 Re: 2006 Cobalt losing coolant and running rough [treehugger81]
Jun 30, 2009 (5:23 pm)
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.
#7 of 21 CHEVY COBALT 2006 OIL LEAKS!!!!!
Mar 24, 2010 (12:13 pm)
#8 of 21 CHEVY COBALT 2006 OIL LEAKS!!!!!
Mar 19, 2010 (6:48 am)
I have a Cobalt 2006bought it from the dealer with 33.00 miles. so far so good...until now. It has 68.000miles, so my warranty expired. It's been leaking oil for a while, so i took it to the dealer service, and seems THE SILICONE ON THE LOWER ENGINE PAN CASE IS WORN OUT. They're asking me for $1.500 to seal it back, and I'm still trying to figure out HOW COME THIS HAPPENED??? Why do I have to pay for some manufacturing mistake if the guy supposed to seal the oil pan didn't do his job right??? I don't think I'm responsible for this, I am trying to find people with this same problem...It seems it's only my car arrrrrghhhhhhhhhhhhh!!!!!
#9 of 21 Re: CHEVY COBALT 2006 OIL LEAKS!!!!! [sensoria]
Mar 20, 2010 (6:56 am)
My advice is to take it to a reputable local mechanic. Ask friends, coworkers, church people for someone they trust.
I suspect you'll find it's much cheaper to have it cleaned and resealed with a seal or with silicone.
Mar 21, 2010 (3:40 pm)
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