One problem related to engine grinding noise has been reported for the 2014 Kia Motor Optima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2014 Kia Motor Optima based on all problems reported for the 2014 Optima.
I was heading north bound, cruise control set at 55 when my 2014 kia Optima thera ii motor started making a grinding sounds, lost complete power and stalled out. Car would not turn on anymore, a texas state trooper and small town cop helped me pushed the car into a parking lot after about an hour, the car started smoking and caught fire from the engine bay. Luckily no one got hurt but the car is a total lose and I have a feeling kia is going to give me the runaround. The theta ii does have an open recall. The motor was checked twice and passed both times.