Faint, Intermittent Scraping Noise
I have a 2007 Chevy Cobalt LS Coupe, 2.2L, 145k miles; very well maintained. I want to try to keep it running for another year or two, and lately I have noticed this very slight, intermittent scraping noise which seems to come from my front left wheel well. I mostly notice it just when I begin driving, at slow speeds, and it does not appear to vary with brake usage (it still occurs when the brakes are not applied). I have also noticed that depending on the weather, it comes and goes.
I did the brakes and replaced the rotors myself about 10k miles ago, and they seem to work fine. I don't notice any major pulling when I apply the brakes, and the car drives relatively straight when I let go of the wheel.
Any ideas? Or should I just not worry about it? Its a 10 year old, A to B type car anyhow.