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2000 Toyota Sienna

Question: grinding noise

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dakyma, 3.0L V6, Gardner, MA, May 21, 2010, 06:33

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when the ac is on or the defrost mode is on with the fan a low humming noise comes from the engine.at times the noise worsens.sort of a grinding noise.help!

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• Answer #1

  patrick mannion from Greg Solow's Engine Room, May 21, 2010, 07:34
  

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  It is possible that the air conditioning compressor or compressor clutch is failing or fan belt tensioner but it needs to be inspected.
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