Weird 5.7L vibration / noise (with clip)

[2012 Overland]

Hi all, just bought a 2012 Overland. Drove from Sydney to Canberra, ran magically! At idle it has a weird vibration / noise. Cant notice anything under load, increased rpm, but doesnt mean its not there. Doesn't sound terminally and really cant put my finger on it. Sounds like it is coming from the front of the engine. My tools are on a boat from Canada and im temp in a apartment so no garage to work on it or even pull the intake off. Any one want to have a guess before I take it in? Ill buy a beer for anyone who gets it right - Edit: the first person to get it right lol.

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[JohnS]

Serpentine belt might be touching something, I have replaced belt on mine and unhealthy noise has now a different sound waive. There are few pulleys, tension spring, I was suspecting bearings failure etc. It seems that is that your and mine (for last 5 years) has a special murmur / whisper, get use to it as I did.

[Nigelh2]

water pump or maybe power steering pump..

[2012 Overland]

Don't like to leave a dead thread so Nigelh2 I owe you a beer. Had always suspected the water pump. Changed it out today and quiet as a mouse. Really easy job actually! Cheers all.