Hi all,
We have a 2001 X5 4.4 sport with 60k on it. Over the weekend, we noticed a whining noise coming from the pulley/water pump/belt area. Loudest in the morning when first started, then subside after about a minute or so. It doesn't completely go away, just quieter. Very noticeable when you give it a little gas. I am thinking it is coming from the tensioners. Is that a good guess?

And while I'm in there, I am also thinking of replacing the water pump, thermostat, belts, and hoses. Is it good advice to replace these things or should I wait since most of the other threads on these parts are usually around 100k? What additional parts would you replace if you had to do it again?

Thanks.
Peter