Murano belt squealing
 

Hey guys,
I just changed my serpentine belt ( the longer, wider one) and adjusted it to what I felt was pretty close to it's previous position. However, now it squeals when I start it up just for a bit. Does this mean that it's too tight or too loose? What is the rule of thumb for adjusting because I'm used to a selfadjusting tension pulley.
thanks
John