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Engine Noise 2003 S80

  #1  
Old 05-21-2009, 03:32 PM
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Talking Engine Noise 2003 S80

Hi, I have a 2003 S80 2.9.
After the car is shut off, there is a buzzing sound that comes out of the engine every 20 seconds or so for a few minutes then stops. I traced it to a round silver gizzmo just to the right of the radiator and a bit lower. It has a few hoses that come out of it and an electrical connection. When I disconnect it electrically it stops and resumes when I plug it back in.Any idea what it is and what it does? Can I change it myself? Thanks
 
  #2  
Old 05-21-2009, 07:24 PM
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Sounds like maybe the brake vacuum pump.
Anyway you can post a pic of it?
 
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