That engine may not be long for this world if it’s lifter noise. It’s usually the number 3 lifter, the needle bearings go out, the roller top starts to wobble and it wipes out the cam, sending metal throughout the system. How do I know? I just replaced the engine in my ‘12 Ram at 120k, and my brother did as well with 107k, both for the above reason. It may last for a good long while, but when it starts to miss and run like it’s losing power upon acceleration, that spells the end of that engine. Cost me $4k for a new reman’d engine, and $3k to have it installed.