Originally Posted by
Infinity
Been there done that. Most of the parts on the front are relatively new and spin freely. Just replaced the alternator for bearing noise and roughness. Noises were there pre and post. at first we thought that was the culprit using a scope to listen.
Perhaps you need to "Been there done that" one more time, since apparently everything that you replaced wasn't the problem unfortunately. I've always had pretty good luck with the water hose stethoscope, but I know that pinpointing problem noises with engine running can often be difficult. You say you don't drive it much, but 190k miles is a lot of miles. And at 14 years old, perhaps it is your water pump as you suggested in your first post.