1st question. I know nothing about cars. Every time we start the 2002 xc70 There is a loud noise coming from the belt. Once the car is running for about five min or so it stops making the noise. So, long story short car cold loud noise from belt, and when car is warm no noise. Now i sprayed belt dressing on the belt and still nothing has changed. I know that it is a self tensioning belt so, could the belt be loose? Or the Pulley is too tight. I don't know. I would appreciate any help.

2nd question. One of the coolant hoses broke away from its clasp. The hose connects to the (i think) ac compressor to the driver side (I think ) inter cooler/radiator. I'm wondering what the specific name of the hose is? Also, if there are good places to get parts from.