What is this noise?

[ParkerFly]

In the video if you listen close you'll hear a whine or low pitched squealing kind of noise. This just started after the hpop (Stealth stage 2) was taken off to fix a leak. A few days after it was back together it started making this noise. Any ideas?

http://www.youtube.com/watch?v=0XWYXsDUCNE

 

[kyle43335]

In the video if you listen close you'll hear a whine or low pitched squealing kind of noise. This just started after the hpop (Stealth stage 2) was taken off to fix a leak. A few days after it was back together it started making this noise. Any ideas?

http://www.youtube.com/watch?v=0XWYXsDUCNE

belt, tensioner, pulley,etc. pull the belt spin all pulleys check water pump.