It's a '95 YJ with the I-6. No A/C.
I've been hearing a howling from the engine at idle. It changes pitch and gets lower as RPMs go up. Listend under the hood, It's comming from the left side or bottom. Could it be the alternator or the vibration dampener? I hit the idler pully with oil, no change. Hit the belt with dressing, no change.
It's hard to pin point the sound without putting my ear in the way of the fan 
.
Do vib dampeners go 'bad?
kevin