As far as the new noise, since the sound stops when you use the brakes, I would say they are the problem. That is where I would start looking. With a wheel bearing, the sound will change when making turns. However, it is usually a growling sound that is heard.
As for the motor noise, I hate to guess and scare you if I'm wrong. However, based on your description, it sounds like a rod bearing or a cam bearing. Is it more of a knocking sound?
Saturday, October 26th, 2013 AT 4:37 PM