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what is this noise

Discussion in 'Gen 2 Prius Technical Discussion' started by terramir, Nov 29, 2018.

  1. terramir

    terramir Member

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    Since I have owned this car (04 Prius) little over three years now I have been mystified by this noise, can't be the water pump or the hybrid/cvt cooling pump because we'll the water pump only runs when the engine is on and the hybrid cooling pump well runs all the time.
    This runs like 95% of the time changes speed etc.
    I just want to know what it is cause it is almost omnipresent in my life I'm in my car alot lol
    terramir
     

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    #1 terramir, Nov 29, 2018
  2. bisco

    bisco cookie crumbler

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    can't hear anything, am i doing something wrong?
     
    #2 bisco, Nov 29, 2018
  3. terramir

    terramir Member

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    Unzip it first plays on cellphones and should work in VLC
     
    #3 terramir, Nov 29, 2018
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  4. SFO

    SFO Senior Member

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    #4 SFO, Nov 29, 2018
    terramir, Raytheeagle and bisco like this.
  5. ChapmanF

    ChapmanF Senior Member

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    Recorded with really low level ... had to wear headphones and really crank it to hear anything. Here's a version with level normalized.

    Sounds like a small washing machine agitating, about 3/4 second period. Stumps me! I would not guess a pump, rather an actuator for something, trying to reach a position, repeatedly. The HVAC damper actuators don't sound quite like that, at least as I remember them. Can you localize the sound at all?

    Noiseprius2ndgen.png

    -Chap
     

    Attached Files:

    #5 ChapmanF, Nov 29, 2018
    terramir and SFO like this.
  6. JC91006

    JC91006 Senior Member

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    This is the sound from a bad 3 way coolant valve. You'll hear it much louder when you pop open the hood.
     
    #6 JC91006, Nov 29, 2018
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  7. terramir

    terramir Member

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    2004 Prius
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    Holy crap
    I have been hearing this sound for the last three years but I have been only getting the coolant valve code for about two months. I bought a new one on fleabay just have not had the time to install it yet.
    Well that solves the mystery sound it seems will report back when I get the new 3-way valve installed.
    terramir
    Chap thanks for the enhanced audio my Samsung note three could not record it any better from inside the car.
     
    #7 terramir, Nov 30, 2018
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