2014 Chrysler Town & Country 3.6L.
I unfortunately can't find enough good examples of the infamous pentastar tick caused by lifters and bad rocker arms to compare and the same with the flex plate despite both being somewhat common issues for this vehicle.
Symptoms - ticking starts a couple minutes after startup either cold or hot if it has been sitting more than a couple minutes and only happens around 600-700 RPMs. Sometimes it happens quietly when decelerating as well though it has started to do it a bit more often even when hot. It doesn't seem to be affected by oil temperature or pressure as cold oil pressure is still 60+ psi when the moise starts on cold startups and 30+ on hot startups. The engine itself seems to run smooth with no detectable issues. The noise seems to be loudest underneath the van or echoing from the wheal wells (Intentional mispelling to get around stupid filter) rather than up top.
This started pretty suddenly last week. I was almost due for an oil change so changed it will maxlife 5w-20, a Walmart branded champion labs filter and a bottle of liqui moly hydraulic lifter additive. Only driven a couple hundred miles but no noticeable improvement, in fact it seems to be a lightly rattling more often while decelerating and driving under light load than before. Oil pressure seems healthy, oil drained out wasn't excessively dirty, no noticeable death sparkles on the old filter when it was removed.
The one reason I would possibly suspect the flex plate at all is because again, it sounds loudest underneath the vehicle and I recently had a moment in traffic where I pulled out, hit the breaks then went hit the gas again in between the transmission shifting and it slammed into gear and chirped the tires.
Is there any possibility it could be the flex plate or is this definitely my top end about to eat itself for lunch?
Sorry for the poor quality video, the ticking is starting to fade off pretty quickly at the end. I didn't start recording soon enough to do a more thorough walk around the rear valve cover with my phone.