Since I have owned the truck I have been back to the dealer about 15 times for peeling paint on the tailgate, leaking transmission, drivers side mirror was replaced three times because it shakes at highway speeds. By the way it still shakes. I have noises coming out of the transmission in reverse and gages that go out intermittently. That was the minor stuff. After 14,800 miles the engine developed a loud tapping noise. I brought it to the dealer and they replaced all the lifters. That did not fix the noise. They then replaced the engine. That also did not fix the noise. They now are saying that the noise is a normal fuel injector noise? Hello Lemon Law!!! Talk about quality control problems.
Don't buy any Dodge products no matter how good they look!!!
If there is a noise coming from the engine, and they replace it and the noise dose not go away then it is not the engine. Check the other parts to see what it is.