Noise Diagnosis - 2008
11-29-2013, 01:57 PM
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Noise Diagnosis - 2008
2008 Cobalt.
Has become noisy, like a revved up sound (errrrrrr, errrrrrrr) maybe like the car grew some ***** but thats not the case.
It only occurs when you acclerate past 15-20 mph. Coasting at like 35-45 its loud and decreases in resonance as the car slows and comes to a stop. Comes from the front but cant tell if its from engine or vibration.
It does NOT occur when in neutral/idle or park when you rev it up (RPM's never go past 4000 when I do that, kinda stuck there?). I first thought muffler/exhaust but I figure that would be loud when just idle as well. If I am just rolling in idle drive I dont hear anything that would indicate the tires rotating... it only occurs when getting up 20 mph and above.
Anyone want to take a stab at a guess?
Has become noisy, like a revved up sound (errrrrrr, errrrrrrr) maybe like the car grew some ***** but thats not the case.
It only occurs when you acclerate past 15-20 mph. Coasting at like 35-45 its loud and decreases in resonance as the car slows and comes to a stop. Comes from the front but cant tell if its from engine or vibration.
It does NOT occur when in neutral/idle or park when you rev it up (RPM's never go past 4000 when I do that, kinda stuck there?). I first thought muffler/exhaust but I figure that would be loud when just idle as well. If I am just rolling in idle drive I dont hear anything that would indicate the tires rotating... it only occurs when getting up 20 mph and above.
Anyone want to take a stab at a guess?
11-30-2013, 08:01 PM
#5
Easy way to check wheel bearings: Jack up the car (lift makes it faster) and spin the wheel by hand, feel the spring or directly on the knuckle. If you feel any rumbling/roughness, the bearings are toast. Pretty common for them to fail and no it's not a big deal to replace at all. My record is about 10 min start to finish for a front wheel hub but I had my tools pretty much laid out ahead of time.
11-30-2013, 08:55 PM
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Ive been reading online about the bearings/hub and it sounds kinda like what other are describing.I will take a look tommorow afternoon.
....if its just the bearings, do you have an idea about a ballpark figure on replacement by a mechanic shop?
....if its just the bearings, do you have an idea about a ballpark figure on replacement by a mechanic shop?
12-09-2013, 12:41 PM
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Have been having this same problem, I assumed it was some kind of bearing or the like because of lack of noise at idle. If I do not immediately fix, could it cause more damage to anything else?
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