After doing some reading it may be fuel related. It was full from the dealer, then I filled it with premium and it started ticking. Next fill going to fill with the recommended 89 octane and see if it goes away. Will post another reply after my experiment
That’s normal for a Hemi, called the Hemi tick. After the engine has set awhile then oil drains off the lifters. On cold start the lifters are a little dry until you build up oil pressure. My son’s 03, 05, my 08 and now my 16 all have done it.
My 03 was the same, haven’t noticed it so much on my 2020 but my 82 360? Woah nelly did she tick until the oil got up there.
I mostly likely just don’t notice it as much being my 82 was pretty darn noisy on cold startup.
I've had 4 Hemi Rams over the years and currently in a 2020 Rebel with under 500 miles. I also own an automotive repair shop. I will tell you that they all tick on first start until oil makes it's way to the top of the engine. I've always felt like this would cause premature wear on the lifters, cam, etc. but it hasn't. I've driven my previous trucks to 200K miles with no problems. I did put Lucas engine oil stabilizer in once and the tick went away for about 1000 miles but came back when the additive thinned out.
I found the culprit on majority of the Hemi 5.7L tick on cold start.
It is a fuel pressure issue, and here is the procedure of determining.
At a cold start, turn on the ignition, but do not start. After hearing the fuel pump stop, turn the ignition off. Then turn it back on, do not start. Wait for the pump to stop.
Then start the truck. It should be a quiet and normal start without the ticking. If it still does, do the above 3 times, then start. If ticking does not happen with doing the above, then it is a fuel pressure issue, and not a manifold, not lifters, not an oil issue. It seems the cold start pressure is not high enough, and some injectors are dry.
Mine never ticks after doing it 2 or 3 times before start.
So, I want to point to a new fuel filter, or new fuel pump, or new fuel regulator.
Try it for yourselves.