I have read through a LOT of posts and see this noise is fairly common and 2-3 different things can be the source. But I figured it would be best to get an opinion from some of the experts here.
2003 T&C, 3.3L, 136k miles. For awhile it's had a rumbling/growling noise while idling. The noise goes away as soon as you give it any gas. Sometimes it wouldn't make a noise and instead be a squeaking type noise like a worn belt. New belt was put on about 6 months when water pump was replaced.
The growling noise usually is worse when the A/C is on but again would go away as soon as the RPM increased so I didn't think it would be the A/C compressor or clutch.
So today, I tried one of the easier things that I was capable of doing, I replaced the idler pulley. So far, NO noise while at idle with the A/C OFF.
I turned the A/C on and the noise comes back, but not as loud as before.
So could the same type noise be made by two different parts? From reading other posts, I see that the A/C clutch is a common issue on making a grumbling type noise. Is that hard to replace for a novice mechanic?