Toyota Prius 2011 (JDM) - Cold start engine rattling sound

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Fouad, Jul 20, 2020.

Tags:
  1. Fouad

    Fouad New Member

    Joined:
    Jul 20, 2020
    4
    1
    0
    Location:
    Pakistan
    Vehicle:
    2011 Prius
    Model:
    N/A
    I bought this car used few months back. It was driven 150,000 Kms. I changed all necessary parts such as: Fuel filter/pump assembly, oil/air filter, transmission oil, engine oil & spark plugs. Got my car scanned and no error codes were found. As soon as I got the transmission oil changed, my car developed a rattling noise at start up (in morning) and sometimes at low rpm during drive. I observed that this rattling noise was mostly audible when the hybrid battery was depleted and engine converted to petrol. I read some articles on internet and changed set of ignition coils, cleaned EGR pipe, throttle and hybrid battery cooling fan myself at home.
    The rattling noise is still there and I don't know what to do. Please share any solution which may help.
     
    #1 Fouad, Jul 20, 2020
  2. SB6

    SB6 Member

    Joined:
    Jan 27, 2019
    312
    67
    0
    Location:
    Texas
    Vehicle:
    2010 Prius
    Model:
    II
    I don't know if it's related to your rattle noise (I'm still relatively new around here), but consider cleaning the intake manifold, the EGR cooler, and the EGR valve
     
    #2 SB6, Jul 20, 2020
    ZBrink, Fouad and bisco like this.
  3. Fouad

    Fouad New Member

    Joined:
    Jul 20, 2020
    4
    1
    0
    Location:
    Pakistan
    Vehicle:
    2011 Prius
    Model:
    N/A
    Thank you for your valuable feedback
     
    #3 Fouad, Jul 21, 2020
  4. ZBrink

    ZBrink Member

    Joined:
    Feb 11, 2014
    73
    30
    0
    Location:
    Fairfax, VA
    Vehicle:
    2010 Prius
    Model:
    IV
    I have a rattle whenever the ICE first starts and stops. I cleaned everything associated with the EGR and it did not solve my problem. I am currently at a loss. I'm thinking the EGR valve may just be bad.
     
    #4 ZBrink, Jul 21, 2020
    Fouad likes this.
  5. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
    11,250
    15,448
    0
    Location:
    Bay Area, California
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    Have you installed an oil catch can?
     
    #5 Raytheeagle, Jul 21, 2020
  6. Fouad

    Fouad New Member

    Joined:
    Jul 20, 2020
    4
    1
    0
    Location:
    Pakistan
    Vehicle:
    2011 Prius
    Model:
    N/A
    Thank you for sharing your experience, you might want to try to change the ignition coils, may be that'll help in your situation
     
    #6 Fouad, Jul 21, 2020
  7. Fouad

    Fouad New Member

    Joined:
    Jul 20, 2020
    4
    1
    0
    Location:
    Pakistan
    Vehicle:
    2011 Prius
    Model:
    N/A
    Please can you elaborate, never heard of it before
     
    #7 Fouad, Jul 21, 2020
    Raytheeagle likes this.
  8. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
    11,250
    15,448
    0
    Location:
    Bay Area, California
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    Here's some light reading in the Gen3 section on the topic:):

    Oil Catch Can, Eliminate that knock!

    That should be able to answer your curiousity and give you some background;).

    I put one on our old 2010 and also on our 2019 Prime as a preventative measure(y).
     
    #8 Raytheeagle, Jul 21, 2020
    Last edited: Jul 21, 2020
    Fouad and Grit like this.
  9. ZBrink

    ZBrink Member

    Joined:
    Feb 11, 2014
    73
    30
    0
    Location:
    Fairfax, VA
    Vehicle:
    2010 Prius
    Model:
    IV
    I'm not going to throw parts at it willy nilly. I'm actually going to try unplugging the EGR valve temporarily to see if the sound goes away.
     
    #9 ZBrink, Jul 21, 2020
    Fouad likes this.
(You must log in or sign up to post here.)
Loading...
Similar Threads - Toyota Prius Cold
  1. Jim23

    Coolant still Overheating and coming out the overflow spout after replacing both fan motor.

    Jim23, Apr 27, 2023, in forum: Gen 3 Prius Care, Maintenance & Troubleshooting
    Replies:
    3
    Views:
    265
    ChapmanF
    Apr 27, 2023
  2. Mandyreich

    I have a 2015 Toyota Prius 4 hybrid and I’m having trouble understanding locking and unlocking doors

    Mandyreich, Mar 19, 2023, in forum: Gen 3 Prius Care, Maintenance & Troubleshooting
    Replies:
    11
    Views:
    442
    RRxing
    Mar 22, 2023
  3. DavidDavid

    Toyota Prius P3190 poor engine power, P0A0F -204 ENGINE FAILED TO START Solved

    DavidDavid, Mar 11, 2023, in forum: Gen 3 Prius Care, Maintenance & Troubleshooting
    Replies:
    6
    Views:
    637
    kutcht1
    Mar 23, 2023
  4. tjohnson329

    2010 toyota prius bad egr

    tjohnson329, Feb 17, 2023, in forum: Gen 3 Prius Care, Maintenance & Troubleshooting
    Replies:
    4
    Views:
    356
    Mendel Leisk
    Feb 17, 2023
  5. carpediemck

    My 2010 Toyota Prius AC no longer blows cold air and there is a rubber smell when the heater is on.

    carpediemck, Mar 26, 2015, in forum: Gen 3 Prius Care, Maintenance & Troubleshooting
    Replies:
    7
    Views:
    1,521
    feivel
    Apr 17, 2015