Thread: Loud rattling noise coming from belt area

had this problem last week its your harmonic balancer. cheap part its also called your idler pulley if your getting noise its loose tighten it and if its broke they only cost 50$ its located infront of ur water pump

Ok, so I finally got back to looking into this problem after I broke off a power steering bolt in the engine block and was dealing with that. Anyways, I adjusted the air gap on the A/C compressor and that did not stop the loud rattling I get at idle. So here is the latest: the car has a very loud rattling at idle, which disappears with just a small increase in RPM. Turning on the A/C at idle decreases the noise somewhat. I removed the supercharger belt: the noise DOES NOT go away. I removed the main drive belt and there is still somewhat of a rattle, although it is not as loud or as continuous. Could this be the crankshaft pulley/harmonic balancer assembly? I noticed when I had the engine dropped down that the rubber in the center of the the crank pulley was starting to deteriorate. Thanks everyone