I have a rattle type noise in my 2010 Forte Koup SX 2.4L which seems to be at idle. It becomes louder upon any load put on the system, ie. lights, climate control, etc. I have had it to my dealer twice, but of course, it doesnt seem to occur when I am there, or there is too much noise over powering it. They did, however replace the upper idler pully yesterday, but the noise it still there. Am I being too picky? It is not extremely loud, but it doesnt sound normal to me. When I am in my garage and can hear it clearly, I seem to trace the sound to the passenger side of the engine compartment, at the low end of it. Any suggestions, help, or previous experiences with this, would be greatly appreciated. I would like to forward this information on to my dealer to help them out also.