[99durango2007]

Lately, I've been having this whine/squeal coming from the engine bay. My dad and I pulled the belt of because he thought it could have been the water pump, again, but when we spun it, we couldn't hear anything. He thought it could have been the tensioner pulley. Took it off, spun it, and you could hear the bearings inside just moving around. So we changed that out, sound went away. Now it's back. Didn't even take a day for it to return. So, we went back and looked to see what it was. My dad said it sounds like it's coming from the alernator. When you touch it while the engine is running, you can feel a rhythm that matches the sound.

Something else, it only does it when it's in R,N,D, but not park. It also stops when I'm on the highway and it hits the "cruising" gear.

PS: We have kinda ruled out the water pump, but not completly. When it went out last time, when I turned the car on, it would squeal. No matter what speed I was going, it would squeal. Even in the "cruising" gear.

Hoping for any input from you guys. Thanks!

PPS: Sorry if it sounds sloppy. I'm a little tired right now.

 

[99durango2007]

The only time my lights dim is when I got my music turned up loud and my amp is pretty much taking all the power to it. I don't have any silicone spray, but I will try the soap on the belt.

Now, lets just say it is the alt., will any alt. work from any 5.2/5.9 engine?

 

[99durango2007]

Well I've found some at junkyards for around $30, but I didn't check what amp rating they were at. And those were only coming off of Durangos.
My belt has around 30k on it right now. We just are not exactly sure what it is, but right now we do think it is the alernator.

 

[99durango2007]

What about the fan clutch? Has anyone had that go out on them? My dad seems to think that might be what it is.

 

[99durango2007]

So, are you suggesting it's my tranny?
I'll have to get a video of it tomorrow so you guys can hear what it sounds like.

 

[99durango2007]

@lowlife: I'll take the belt off tomorrow to see if it does it or doesn't.

@6shooter: I haven't noticed much difference in sound under heavy electrical load or not. I'll listen closely tonight, then listen tomorrow on my way to school to see if there is any difference.

Also, it does stop slightly when I hit crusing. I'll listen to that also to give you guys a better description of the sound.

 

[99durango2007]

OK, so I did not really notice any difference in noise while having the lights on, wipers on, stereo on etc. One thing I did notice though is that when I turned my rear defrost on when I had my dome lights on, they dimmed, then went back to normal. So I'm guessing it is the alternator going out on me.