Rattling sound on Gas / Engine

Discussion in 'Prius v Technical Discussion' started by Priusdriver265, Sep 2, 2024.

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  1. Priusdriver265

    Priusdriver265 New Member

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    I have Prius Alpha (Prius V or C) 2013. I hear a rattling sound coming from engine / transmission area. The sound only comes driving on petrol / gas while the car is on low RPM. On EV mode, there is no sound. I got the spark plugs checked, air filter changed, fuel filter, air filter, throttle body, injectors and EGR cleaned but the sound is still there. The transmission oil has 30k kms on it and is still maroon with not metallic particles (as per the mechanic).

    What could it be?
     
    #1 Priusdriver265, Sep 2, 2024
  2. Priusdriver265

    Priusdriver265 New Member

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    Even got the catalytic converter cleaned.
     
    #2 Priusdriver265, Sep 2, 2024
  3. rjparker

    rjparker Tu Humilde Sirviente

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    Head gasket leak causing misfires
     
    #3 rjparker, Sep 2, 2024
  4. vand8

    vand8 Junior Member

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    If it always occurs when the engine is on at low rpm, then it could be a heat shield. I've had some heat shield mounting points on my Prius v and my Pontiac Vibe (Corolla underpinnings) rust out, which would then result in the heat shields rattling since they were no longer firmly mounted. Always heard at low rpm as noted. So I would check the heat shields first.
     
    #4 vand8, Sep 5, 2024
    Air_Boss and bisco like this.
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