1996 Olds Delta 88 LS - 101,000 miles - 3.8 Litre

Stumped Scott (and Brother too!)

Screeching and Chirping from Serpintine Belt Area as best as we can tell. Starts after car on road in appx. 15-20 miles. After that far, you shut off engine, start while warm will screech/chirp within 5 seconds and usally stops until you start driving. Screeches/Chirps at all speeds but usually if you accelerate it will stop until you let off gas. I have replaced:

"Sepertine Belt"
"alternator"
"the whole Serpentine Tension Unit"

I know that the Power Steering Unit and Water Pump are on this "Serpentine Loop" but steers/turns fine and no over heating. Help! Thanks!