2006 Chevrolet Cobalt Unknown Whistling Sound

2006 CHEVROLET COBALT
81,400 MILES
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PHILLIP001
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Good Morning,

Whenever I start my car there is a whistling sound that fluctuates sporadically for a few minutes and then eventually disappears. I have tested and noticed that the sound will start every time I start my vehicle both when the vehicle has been driven all day and when it's just being started for the first time that day. I've located the sound to be (when sitting in the driver seat) under the right side of the car just past half way closer towards the rear tire. I will try to describe the sound as best I can; high pitched, lasts approximately less than 5 minutes, fluctuates almost like a "reving" action, does not fluctuate along with the same pattern or timing as the vehicles idle, and if you would like I could make a recording as best I can of the sound for you. There has been no noticeable loss of power or changes in the vehicles performance; however, I have only become aware of the sound within the past year and it may very well have been present when I first bought the vehicle. After doing a little research on my part I am going to be replacing two of the gaskets that are located on the exhaust coming off the engine for a cheap fix to see if by chance that my be a solution. I do not feel, however, that will be very promising considering that the gaskets I will be replacing are not in the same location as the sound, but we will see. Any and all time taken to review my issue is greatly appreciated. Please and thank you and have a great day.

Respectfully,

Phillip Bryant
Jul 19, 2013 at 9:16 AM
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HMAC300
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see if there is a hose ff around item 6 in drawing also check the same near evap cannister
Jul 19, 2013 at 9:33 AM
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PHILLIP001
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All hoses around that area appear to be in good condition and connected properly. I did notice though on the back side of the EVAP canister that the back hose was able to spin around the fitting. I don't know if that's normal or not but it appears and feels as though it has a proper connection to the canister.
Jul 19, 2013 at 9:59 AM
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PHILLIP001
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I need to apologize, when you said EVAP canister I was picturing something else in my head. I will take another look and feel in a little and tell you what I find. I looked under the hood at the area you first requested I look and the answer to your original observation is no I do not see any hoses loose or off around that area. I will check near the gas tank soon and tell you about the EVAP canister.
Jul 19, 2013 at 10:03 AM
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HMAC300
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other than that you'll have to let alocal guy look at it. sounds are very hard to figure out here.
Jul 19, 2013 at 12:18 PM
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PHILLIP001
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Thank you for your assistance. When I resolve the issue I will come back on and post the solution. Have a great day.

Jul 19, 2013 at 12:23 PM