I cannot figure out what is squealing in the front end of my pathfinder. I replaced all belts (except timing belt), replaced upper tensioner pulley. Any ideas? I was thinking either something to do with timing belt or lower tensioner pulley. I cannot pinpoint where noise is coming from. It could be lower tensioner pulley, but Pathfinder is due for a timing belt, so that is my next step.

Any ideas are much appreciated, thanks.

I am having the same problem on my 98. Was it the water pump making this noise? I'm going to replace mine and the timing belt. Should I be looking at replacing something else?

My 96 is doing it too. It used to come and go. Now it is more constant. Check your coolant level this MAY or may not be the problem. I noticed that the squeek/squeal/ hummgrind (the sound is sort of combo of all three sounds) increased when a lot of my coolant leaked out while I was on the freeway. -bad hose (and almost impossible to spot -the hose that cracked and leaked is nearly hidden behind the timing belt and under the distibutor -i couldn't tell where the leak was comming from until I took off the radiator and did a pressure test w/soap sprayed on the area where the hiss was comming from.

My temp gauge never went beyond it's normal day to day range. I just hope my water pump is ok.
Will post again with fresh coolant.

I also thought that it maybe the pulley tensioner (upper one seems a little rough to the touch when rotating it by hand). so I'll probably replace that too since everything is apart.