If you suspect the timing chain is loose, pull the right side valve cover (left side when looking under the hood - the one with the oil cap). You would see wear patterns on the head and/or the valve cover from chain slap. This would mean you need a new chain and tensioner (or at the least new upper chain rails), unless that wear is from a previously stretched and since-replaced chain.

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Current:
2021 Charger Scat Pack Widebody "Sinabee"
2018 Durango R/T

Previous:
1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
1999 Chrysler 300M - RIP @ 221k