HI I have a Honda Civic that has been running well. Untill a couple days ago, I started it up and heard a noise coming from the side of the engine were the pulleys are. The car does have a/c. When the car is running it seems okay the enigne itself, but I am afraid of driving it,, because you never know what could happen. It sounds like a scrapping noise. I have turned on the a/c button on the dashboard, which kind of lowers the sound a little bit, but then the noise gets louder. I took it in to get a oil change and they said it might be that one of the pulleys is lose. Is that a job worth doing or what should i do?