Postby
Rogue Jarhead »
https://forums.nicoclub.com/rogue-jarhead-u216599.htmlThu Dec 01, 2016 3:02 pm
Sounds like a pulley in the serpentine belt path, probably the belt tensioner. If its still under warranty take it to the dealer and see what they say.
If not try spraying a little bit of WD 40 into the back of the tensioner, then start it up and see if the noise has changed or gone away. If it has, that's an indication the tensioner is going bad. If the noise is still there shut it off and repeat with the other pulleys in the belt path. Bearings dry out over time, and sometimes you just get a bad one to start with.