Mazda belt solved the problem.
Note to self - USE FACTORY BELTS ALWAYS.....
The GY is going in the trash.
Mazda 626 2000. Mine started doing the same thing you are describing about a month ago. Loudest squeal in the world! Sounds like its coming out of the power steering. Does not sounds like a belt could make that much noise. I took it in and they said I needed to replace the belt (it had never been replaced and has 125k miles), so I agreed and they did. It stopped for about a week, now does it every morning or everytime my car sits for more than about 2-5 hours. It only last for about 10 seconds though, then stops completely. I am assuming it was a mazda belt on originally and after market now, but is making the same noise with both belts? I guess I need to try a Mazda belt though...I am out of solutions.
"What I saw is that belt runs on the crankpulley and water pump pulley was touching the other belt pulley"
My '02 DX had this happen. Near the useful end of the belts life, the alt belt had "jumped" one groove outward and was rubbing the other belt, producing a low moan at times. Next thing I know I'm changing both belts on the side of the road, 20 miles from BF Egypt, without removing the CC bracket or strut brace. My left arm looked like hamburger when I was done. DOH!
Mazda is charging me 70 bucks for both serpentine and ac belts, and labor is free cuz i know the guy. Hopefully this fixes it, otherwise. IUNNNO!
Sorry to revive this thread, im having the same exact problem. I have an 06 mazda 3 , 64 Thousand K Km's. The dealer replaced the tensioner, and still hasnt solved the problem.
Please check my youtube video:
http://www.youtube.com/watch?v=Hznf8IMhFnA
Let me know if this is the same sound that you had. I really need your opinion. I noticed if i spray wd40 on it, the sound is gone...