Ok so a few weeks ago I started noticing a noise coming from the engine bay, sounds like what other described as marbles insides the engine. It only does it when at idle and up to about 1500 rpm but after that it stops as your increse rpm. Im taking it to the dealership tomorrow at 2 and droping it off. Anyone have any similar problems or anything like it. I want some what of an idea so when I go tomorrow, I can tell them what I have read it might be. It has got louder and louder and today it was pretty loud. Im starting to worry its some major internal problems. Does anyone think I should ask for a new engine? Haha, I know its a bit early to be hinting in that direction but if it comes to it....?

Any help is greatly appreciated!!