I bought a Durango 2016 in 2017 on Miami Lakes Auto Mall. At 2000 miles the motor 3.6 pentastar started making a noise like that of an old motor. I took the car to the dealer to the car and the camshaft, Gear camshaft, and phaser were replaced. The lift and rocker arm of the right side of the engine were also replaced. Since then the noise got better but is still there. I have taken it back to the dealer several times and mechanics cannot find any problem, they said it is a normal sound. I took to another dealer and the mechanics said the same thing. They gave me a rental with the same motor 3.6 pentastar and the motor didn't make the sound my car was making. I told the mechanics that how come it was the same motor and didn't sound the same. Every time I drive it I hear that noise as if it was a lifter or rocker arm sound. I feel frustrated because the car is new and under warranty. I cannot make sense that a new car would have this sound.