Pelican Parts Forums - Wheezing sound?

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- - Wheezing sound? (http://forums.pelicanparts.com/showthread.php?t=773674)

I spent a moment trying to trace the source of my coolant leak this morning (see separate post on that wonderful topic) and noticed that, at idle, my 2004 Cayenne Turbo makes a wheezing sound. It is steady, about once per second at idle, and it sounds like it is coming from the front driver-side corner of the engine.

Any thoughts on possible sources?

I took a short video on my phone, but this isn't the iPhone support forum so I'll try to fix my issues there and get it uploaded to YouTube and add a link here.

Here is the video: 2004 Cayenne Turbo Wheezing at Idle - YouTube

The sound is a bit higher frequency than once per second. And it's mostly drowned out by the engine itself. But if you listen, it's there.