Okay guys, just replaced the 5.7 in my '13 Ram 1500 with a factory New engine. At 112,124 miles my daughter started the truck and said it started ticking. All the advice I got, including from my regular and reputable mechanic said 'sounds like the hemi tick'. Well... it wasn't.

Maybe at first it was but I saw the failed parts. The Chrysler dealer mechanic showed me the parts from the roller end, a pivot point he called it, I though it was a shaft that the needle bearings rode on, had a flat spot. Retainers broke and the needle bearings came out and then my cam was gone with a crap load of metal in the pan.

Yep, 112,124 miles and Chrysler Care set me up with some good will warranty help but only partial.

So, to the Question of the Day:

What is failing when an engine has the Hemi Tick? Has a Post Mortem been done to actually explain it?

Is the lifter collapsing? It the roller failing? Something else?

TIA