when my car is running it almost sounds like there is the sound of a chain rubbing against sumthing. i dont know what it is and i dont even know where there is a chain. maybe im losing it. can someone tell me what this is? and is it normal for a NX 2K with over 117,000 miles?
Timing chain is most likely making noise, maybe because the timing chain tensioner or the timing chain guide need to be replaced. What you're hearing is quite normal. You hear this at idle when the car has warmed up, right?