Question about 2007 Chevrolet Cobalt Coupe

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Ticking noise I have a 2007 chevy cobalt (recently bought - used). After I shut off the engine, there is a continuous ticking sound under the car (by the engine part) lasting 3-4 mins. I brought it in for inspection and I was told it was the exhaust cooling down, as the metal expands, it makes the ticking sound, and it is normal. My car does this all the time and it is frustrating. I didn't notice the ticking on the first day i got the car, but now it is constant. Is there anything that can be done to eliminate the ticking sound? Does other 2007 cobalt have this?

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  • Anonymous Dec 11, 2008

    Hey i have a 2006 cobalt and I have the same problem and was told the same thing by the dealer.

  • Anonymous Mar 15, 2014

    i have 2007 Cobalt, after start the engine for 5 minutes, there are ticking sound from the back of the car, and it is always 6 ticks, and then stop. if the car cool down for some time and start again, here it comes again.


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It is part of the waste gate just above the gas tank. It periodically checks for leaks and pressurizes and releases. Gives a ticking noise when it does this. Not a problem and GM is aware of this and said its normal on our cars.

Posted on Dec 29, 2008

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I own a 2007 Cobalt, and I have never experienced this before. Mine currently has ~15,000 miles on it, and the only ticking noise that I have noticed is when I first start my car, and I idle I sometimes hear a ticking noise that "ticks" about 5-6 times and it comes from the rear of the vehicle. But it only lasts for about 3-4 seconds.

I have heard other vehicles make this sort of ticking noise after they are shut off, which is attributed to what you were told about during the inspection. Metal makes noise as it expands and contracts, and cars generate heat, which causes the metal to expand and contract as it heats up and cools down.

Posted on Jun 09, 2008

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I would agree with it being the car cooling down im not sure if it is common on all cobolts though

Posted on Jun 02, 2008

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