I have a 2007 Honda Odyssey EXL and currently hearing a squeal noise when I start the van and it's cold. This noise fades away as the vehicle warms up. I was told by a mechanic that my pulley was going bad. I had another mechanic who looked at the van and said the noise is due to oil...

I’m about to jump into replacing the alternator and ps pump. I’ve looked into removing the serpentine belt but I’m not sure all that goes into that when replacing the alternator and ps pump. Can I loosen the belt from above? What do I need to worry about when putting the serpentine belt back on...