Ok so anyway i was driving on the highway and my belt tensioner/belt flew off i d rove about 3 miles on battery powre and was able to make it home. I noticed my car was alot quiter once i got home i knew something was wrong because my bat light and brake light was on. But not only that when i got home my car was very quiet, ever since i did the de-k swap theres always been a bad bearing noise, and it gets louder as you rev. I know its coming from one of the pulleys obviously. But which ? So i go to look under my car and i notice my belt is missing the crank pulley is still spinning opbviously along with the power steering Its silent. I look alittle closer my belt tensioner is gone, so im like wow so that must be what had a bad bearing so i go get a new one from nissan only to find out that the noise came back! So basically what im wondering is what the bearing could be, Its not the alternator,because i just replaced it.I doubt its the power steering, or idler pulley. I guess that leaves the ac compressor pulley bearing ?. Because when i lookd at my car i left it running and obviously the only belt that was still working was the powre s teering and the crank pulley was still spinning so that pretty much eliminates those two right, because if you guys think i have a bad bearing in teh crank then im just gonna pull the motor and do a 3.5 swap. Let me know what you guys think

 

Rob, turn on your AC from the dash board and see if the sound goes away.

 

maintenance & mechanical sticky. it's all there.

 

why do you doubt it's the idler pulley?

 

because i just replaced it with a brand new one from nissan today.