2014 Ram 5.7 hemi issue.

Need some help on diagnosing the noise coming from engine on idle. With engine idling , standing outside of truck, can hear what sounds like maybe a lifter/ rocker arm ticking real loud . Bring engine off idle and noise goes away. Has 150,*** miles on it ,still runs ok . Just looking for somethings to check. If a Mopar deal tech , or someone else has any ideas please chime in. Thanks in advance!
Al