2011 whining sound

[jjernigan1]

My 2011 pathfinder is making a high-pitched whining sound at lower rpms ( 1500-2500 approx ) . It's to my understanding that the 2011 and 2012 Pathfinders haven't had any timing chain issues. I also read somewhere that it could be an aftermarket oil filter or belt tensioner wheel. It's weird it only does it with the lower RPMs.any help on this would be greatly appreciated

[Slartibartfast]

I don't know the R51 but my WD21 has a bit of a whine just off idle that I've been meaning to track down. It seems to be coming from the intake, suggesting that there's some kind of burr or sharp spot somewhere in the intake system that air is rushing over and making noise. I haven't worried about it too much.

 

To check if it's the belt, you could just remove the serp belt, run the engine, and see if the noise is still there. Air filters are cheap, you could try a replacement there and see if it changed anything if you thought yours might be the issue.