Sounds like the belt tensioner to me, but still too early to tell. I'd maybe try spraying a little bit of WD40 on that nut/bolt (you know, behind it) to see if it makes any difference.

Good luck!

 

Cannot access youtube at work, but is it making a knocking like noise? If so, it is most likely the belt tensioner. Been there, done that, got the t-shirt!

 

i have a noise sililar to that occasionally. It happens when i dont drive my car for a week. It is my alternator. I was able to figure this out by giving it a small shot of WD40 to the front of it behind the pulley while it was running

 

take off the serp belt and spin the tensioner pulley. if it's spins rough or noisy, replace it. I replaced mine with Dayco 89055 pulley rather that replacing the entire tensioner assembly and the noise was gone.

 

Def pull the belt, check the crank pulley as well. Does the noise change with load like when putting the A/C on? I have a like new belt I bought when I was trouble shooting my squeal if your interested.

 

Ive had to rebuild my belt tensioner pulley. I went with a metal set-up versus a plastic one. the plastic pulley shot and so were the bearings. I also had to swap out the harmonic balancer because it was coming apart. Be sure to look at these closely.

 

It looks like your belt is not riding right on the pulley to me.
Look here.

 

Dude, try the KISS method before anything else. Keep It Stupid Simple. Try some belt squek spray. 4 bucks at oreily's.

 

Not a slipping belt... could be how the belt is pulling on that pulley in an awkward way. It is definitely a rotational whine which is where bearingsmay be beginning to fail, or slight metal-to-metal contact between a pulley/housing.

Timmah? Where u at? What did U find?

 

To follow up with my other suggestion. Yes, metal to metal or bearings going out which would cause an angular pull on one or more of the pulleys could cause the sound as well. I would take the fan off, then listen for the sound. With the fan off you can put your face closer to the engine and not worry about being smacked in the face. Also, the fan causes alot of noise that can mask the source of the sound.

 

Timmah I live just up 63 highway from you man, and would happy to take a look sometime. Shoot me a pm or something if you want some help or another set of eyes/ears etc.

 

Wow, thanks for the response.

I've driven it some more, and the noise has disappeared. Of course that doesn't mean it's gone, so, seeing Supratwins post, I went out and looked at that pulley.

The accessory belt is hanging off of that pulley just a few mm's or so, towards the back of the engine bay. I'm guessing that isn't normal. The belt is fairly tight however. The belt is VERY close to touching the engine itself due to this as well... maybe the sound was because the belt actually was rubbing against the metal?

Chase, that sounds good. PM sent.

Ninja edit: Fuck that picture is huge! resizing!

 

Yep, same chatter from my belt tensioner. You can take a screw-driver and press against it while the engine is running. (BE CAREFUL!!!) There is a good thread that explains how to replace the bearings in the pulley tensioner. It's a cheap fix. You should be able to find the thread with a quick search.