car gets really loud, like a winding noise, when going over 25mph. Shifts and drives ok, just loud. Gas mileage as it should be also.
car gets really loud above 25mph, loud kind of winding noise, drives and shifts ok. Does not shake. Gas mileage still good.
Check your pulleys, belt and belt tensioner, cooling fan.
Is the noise com9ng from the engine area or could it be your cats are sick?
check wheel bearings for wear
If it sounds like it could be an exhaust noise check the flex connection that connects the exhaust manifold on the engine to the exhaust system. I've had 2 '06s and they have both failed. It's not a cheap part, surprise, surprise, but you'll need a new one. Don't bother with a used one. The labor is about 1.5 hours at a muffler shop.
Looking for a Used Cobalt in your area?
CarGurus has 5,560 nationwide Cobalt listings starting at $950.
Search Chevrolet Cobalt Questions
Chevrolet Cobalt Experts