Hi all,
Same issue here with the squealing replacement serpentine belt. It's not the wrong belt, but WRONG INSTALLATION! Read on for the FIX.
And no, you don't need a new A/C compressor, you need a new mechanic
So I just put on a new serpentine belt on my girlfriend's 2010 Nissan Rogue a few days ago. The old belt had 105k miles on it and the ribs were getting rather cracked.
Anyways, since the install, it has chirped slightly on every startup. Today, she was driving around in the rain and using the A/C to defog the windows, and the belt was squealing very loudly.
So I looked into it; Turns out I routed the belt wrong! As with any drive belt, the TENSIONER HAS TO BE THE
LAST ITEM that the belt runs over, before returning to the main crank pulley. On the Rogue, (and I assume all other Nissans with the QR25DE 2.5L engine), the belt CAN be routed incorrectly to go over the tensioner pulley BEFORE "pulling" on all the other accessories. Therefore the belt tension at the accessories is reduced, leading to the dreaded belt squeal, especially as the accessories are loaded.
Long story short, I re-routed the belt, and no more squeal!
The correct routing is as follows: Looking at the crank pulley from the right wheel well, the pulley turns clockwise. The belt first "pulls" on the A/C compressor, then straight up to the alternator, then idler and waterpump, and FINALLY around the tensioner and back to the main crank pulley.
Hope this helps!
Ivan