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Weird moan from heater

Discussion in '2nd Gen Tundras (2007-2013)' started by nicktrd09, Dec 20, 2019.

  1. Dec 20, 2019 at 11:14 AM
    #1
    nicktrd09

    nicktrd09 [OP] New Member

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    have another concern when I run the heater in the morning for instance after I park and turn off the ignition I hear a weird moan or something almost like a low key roar? Is that the thermostat or
    ? It sounds like it's comming from the defroster area on the dash
     
  2. Dec 20, 2019 at 11:18 AM
    #2
    Scuba

    Scuba Sober member

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    Austin, Tx.
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    Secondary air injection system. Smog pumps on the back of the engine.
     
  3. Dec 20, 2019 at 11:25 AM
    #3
    duece292

    duece292 Appalachian American

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    This ^ . It's normal, just the AIP purging itself.
     
  4. Dec 20, 2019 at 12:51 PM
    #4
    nicktrd09

    nicktrd09 [OP] New Member

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    Thank you
     
  5. Dec 20, 2019 at 12:55 PM
    #5
    hagrid

    hagrid The most diverse of Diversity Hires!

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    paynuss stretchers
    Moaning and purging.

    These are the cornerstones of an epic thread.
     
    duece292 and TheBeast like this.
  6. Dec 20, 2019 at 1:04 PM
    #6
    JoshuaA

    JoshuaA Canuck Member

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    41433586-9A00-4A76-82F2-F933E0997FE4.jpg
     
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  7. Dec 20, 2019 at 1:46 PM
    #7
    nicktrd09

    nicktrd09 [OP] New Member

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    You guys are really cool and helpful scuba, duece
     
    duece292 likes this.

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