2002 Hyundai Elantra Q&A

2002 Hyundai Elantra Question: what makes the belt squeal when you start the car, only for a few seconds .

the belts ( three ) are all new, They sqealed before I replaced them, then they stoped for a short while when they were new, but now they squeal again when the car frist starts up. -
Answer 1
Are the fan belts properly tensioned (not loose) make sure the pulleys are all properly aligned and the pulleys and belts have no oil or coolant contamination. If the fan belts use an automatic spring loaded belt tensioner perhaps it is failing. -
Comment 1
pullys look straight, they are new clean belts, ( doesn't have a auto tensioner ) I thought I properly tighened them , but I guess I'll try to make them tighter Thanks -