Motor/generator clutch.

Discussion in 'Gen 4 Prius Main Forum' started by Breck, Jul 25, 2018.

  1. Breck

    Breck New Member

    Joined:
    Jun 8, 2018
    2
    0
    0
    Location:
    NMB SC
    Vehicle:
    2016 Prius
    Model:
    Two Eco
    Has anyone had a problem with the clutch that engages the electric motor when you let off the gas or put on the brake? I get a scraping metal on metal sound, it comes and goes like a piece of metal is getting between the faceplate and clutch sometimes??
     
  2. alanclarkeau

    alanclarkeau Senior Member

    Joined:
    Feb 24, 2016
    5,970
    6,538
    0
    Location:
    near Brisbane, Australia
    Vehicle:
    2016 Prius
    Model:
    N/A
    I'm intrigued - are you talking about a PRIUS - not a PRIME (which has a one-way clutch)?

    Because there is no clutchplate as such. There is a Clutch-Damper Assembly, but I'd doubt that's going to be a problem. I wonder if it's not the actual brakes?
     
    fuzzy1 and Starship16 like this.
  3. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    88,686
    39,633
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    how many miles on your car? have you owned it since new?
     
  4. tucatz

    tucatz Active Member

    Joined:
    Jul 11, 2010
    444
    380
    0
    Location:
    Manzanita, Oregon
    Vehicle:
    2016 Prius
    Model:
    Four Touring
    That’s just the sound the car makes in regen mode. The ‘scraping metal’ sound was much more apparent in my gen 3
     
  5. alanclarkeau

    alanclarkeau Senior Member

    Joined:
    Feb 24, 2016
    5,970
    6,538
    0
    Location:
    near Brisbane, Australia
    Vehicle:
    2016 Prius
    Model:
    N/A
    I'
    I've never heard a scraping metal sound. The Regenerative braking is more a whirring of the generator - like a spaceship in some situations. But if you brake harder, it makes a different sound.

    Letting the accelerator off, generally the ICE will stop, and the MG1 and/or MG2 will start regenerating - and should be silent other than the whirring of those. Occasionally, the ICE will give a momentary shudder as it either starts (mainly first time after a cold start), but I've never noticed it when it stops.
     
  6. tucatz

    tucatz Active Member

    Joined:
    Jul 11, 2010
    444
    380
    0
    Location:
    Manzanita, Oregon
    Vehicle:
    2016 Prius
    Model:
    Four Touring
    My 2010 and 2014 prius both made a very audible ‘scraping metal’ sound that could clearly be heard with the window rolled down. I’m surprised this is not discussed at depth on this forum.
     
  7. The Professor

    The Professor Senior Member

    Joined:
    Apr 5, 2018
    477
    635
    0
    Location:
    UK
    Vehicle:
    2017 Prius
    Model:
    Excel
    Does it sound like this? Could be a blown trans-axle.

    ;)
     
  8. goldfinger

    goldfinger Active Member

    Joined:
    Mar 12, 2012
    535
    393
    0
    Location:
    Buffalo
    Vehicle:
    2016 Prius
    Model:
    Three
    There's a thread here about "clicking sound on regen or braking". The conclusion was that bad CV joints can make noise while regening, but be quite during normal driving.
     
  9. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    88,686
    39,633
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    i've never heard a metal scraping sound with 3 pri.
     
    krmcg likes this.
  10. RCO

    RCO Senior Member

    Joined:
    Aug 31, 2016
    3,709
    5,162
    0
    Location:
    Cornwall
    Vehicle:
    Other Hybrid
    Model:
    N/A
    Pardon me butting in but could it just be the noise of the brake pads on a recently rusted disc (rotor) ?
    You know the way they tarnish after a wet drive or heavy dew overnight but wear off after a few minutes driving.
     
    #10 RCO, Jul 28, 2018
    Last edited: Jul 28, 2018
    krmcg and alanclarkeau like this.
Loading...