MCP-35X making a new chirping noise

Hello all,

Just turned on my PC today to hear my pump making a nice little chirping noise as it revs up.

Here's a video of it revved up and you can hear it:
http://eriksplace.com/shared/pumpnoise.mp4

Anyone else had them do this?

Should I be worried?

Thanks.

my first guess would be a pocket of trapped air.

very nice build BTW!

Thanks, the pics, etc. are SUPER out-of-date, and need to be updated!

That could be, as I normally leave it on, but have been turning it off during the days while I'm not using it (summer time).

I'll keep an eye (ear) on it and see if it gets better/worse.

Yeah I also believe it some type of air bubbles trapped. Give it a tap a few times as they can be lodged internally. Where is your reservoir?