I have 2015 Jeep Grand Cherokee Altitude which at start-up when or after it sits awhile will make a popping ticking or crackling sound not sure how to explain it , goes away after about 15 seconds. Now that that were getting into
warmer temps it's not as severe, dealer has been unable to duplicate. This happens everyday not sure why dealer couldn't duplicate maybe they just don't
want to brother.
It almost sounds like the exhaust, I've heard similar vehicles do this but on a
lighter note after shutting the engine off. The jeep is the first vehicle I've ever owned that does it on start-up and so much more severe.