I recently noticed a stranged sound on the engine of my sportage 2014 when the RPM reaches 1000. Sounds like a grinding/vibrating noise so irritable. Its only on 1000RPM. When I turned off the AC no sounds coming. Its One year and half I'm been using this car. The ODO only 36,861 Kilometers. Every 5K and doing service at kia quick service station. Any one can help me or having same problem? What you do to get rid of this problem?