2004 Jeep makes a roaring sound when first started

SOURCE: Loud air intake engine noise on startup

If the check engine light is on, there is a bulletin out on the air pump that is possibly your problem. I'm dealing with that same issue.

SOURCE: 2002 jeep liberty siren whining noise on start up

I had the same problem at about the same mileage. Replaced the power steering pump and the start up screaming went away! ( The Jeep's and mine!)

SOURCE: oil consumption, rattle, engine noise

Check under the hood and inspect the valve cover gasket. If it's bad it would explain why you don't see any leaks on the ground because it's probably burning off on the manifold. This ticking you're hearing is a lack of lubrication to the rocker arms. Apart from the valve cover gasket, you should get under the car and inspect the oil pan and oil filter for seepage. Best of luck on your problem.
Greg

SOURCE: Clicking noise on acceleration

I know how to fix you're problem.... Get some Fosgate 12'inch sub woofers With a 2 channle amp and some Boston speakers with a 4 channle amp ,. :) You Will NEVER hear the sound again.... . :)

I don't think it's a normal sound at all but, ........................... I can't really tell you, seeming i didn't build the car lol , Does it make the sound after the car is off?

And if it is normal..... Then you should go get a Corolla lol

Did you ask them why it makes the sound it does? And what did they say? I seem to find most people that work at the dealers are morons. And all they do is well... we can check it out for you 200$.. lol Then tell you we couldn't find it, :<

Best of Luck

Testimonial: "You gotta love it! "

SOURCE: 2000 Jeep Cherokee Gear Grinding & 4WD Whine sound

Give a try by change your transmission/filters and Transfer case oil.