We have a 1994 Saturn with a DOHC. The engine makes a whirring noise whenever we slow down to a stop. Why?

Question

It only happens when we are slowing down to a stop, like stopping at a traffic light. The sound starts at a high pitch, then slowly goes down to a lower pitch. It isn't loud at all, you can just hear it as the engine's speed goes up and down, ever so faintly.

It sounds almost "musical", if that makes any sense....like a wind instrument....if anyone has any clue...we'd love to hear it!

Almost forgot. We just had a new belt and new idler pulley and tensioner put o it.

Answer 1

Daniel, maybe someone put one of those Klondike Bars in the engine....dirty rats!!
I wish I really knew. I'd be over there in a flash and fix her right up,friend.