Q: I have a 1999 Nissan Maxima with only 57,000 miles. I hear a clunking sound at idle from the engine bay. Could this be the timing belt? I actually do not know if this engine has a timing belt ...

The most common knocking sound comes from an engine that has improper combustion timing. This means that ... type noise can be the engine's accessory belt, which is routed through several pulleys ...