2010 Prius Engine Rattling. Should I be Concerned?

Discussion in 'Gen 3 Prius Main Forum' started by JJC123, Oct 13, 2019.

  1. JJC123

    JJC123 New Member

    Joined:
    Oct 13, 2019
    3
    2
    0
    Location:
    Chicago
    Vehicle:
    2010 Prius
    Model:
    N/A
    I have had my prius for about 9 years (it recently reached 90,000 miles) and have never had this problem and was wondering if someone also has experienced this or if I should take it to get checked. I recently took my car on a total 6 hour trip this weekend (no issues). When I got in my car again today, it started to make this revving/rumbling sound that was a bit jerky. You could even feel the car shake a little in time is the jerky rumbling. It eventually settled down, but it happened again when I got home and placed the car in park. (I occasionally happened lightly while we were driving as well). It sounds like it is the engine, but the engine light didn't turn on. Is it possible it has to with the battery charging or is there something wrong with engine?

    Thank you!
     
  2. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
    9,190
    12,397
    0
    Location:
    Bay Area, California
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    Welcome to Prius Chat (y).

    Some questions:
    • Is this the first time you’ve noticed the behavior?
    • Is the coolant level stable for the engine?
    • Does your Prius consume oil?
    • Has the egr circuit been cleansed?
    Good luck and keep us posted (y).
     
    Pluggo and Mendel Leisk like this.
  3. Pluggo

    Pluggo Active Member

    Joined:
    May 23, 2016
    456
    404
    0
    Location:
    Folsom, Pennsylvania
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Advanced
    It's not the battery. Hopefully, it is not too late to clean the entire EGR circuit. Your head gasket may be at stake, as per @Raytheeagle 's comments.
     
    Raytheeagle likes this.
  4. Sharnold

    Sharnold Member

    Joined:
    Jan 16, 2019
    309
    101
    0
    Location:
    Alabama
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
    Mafs, map, and throttle body being dirty or oil saturated will cause these issues also especially at idle. Seen it many times when oil was overfilled or the pcv is stuck open

    Posted via the PriusChat mobile app.
     
    RMB likes this.
  5. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    83,130
    36,262
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    worry? no. concerned? yes.
     
  6. Mendel Leisk

    Mendel Leisk Titanic Social Director

    Joined:
    Oct 17, 2010
    35,689
    24,537
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    @JJC123 what's your situation, are you mechanically inclined, doing some maintenance yourself? Or strictly dealership serviced? Somewhere in between. Let us know.

    The aforementioned Exhaust Gas Recirculation circuit was introduced in 3rd gen, and had a major revamp with 4th gen, likely to address shortcomings. Specifically: that the dang thing inexorably clogs up with carbon, and as it does engine temperatures climb, head gaskets fail.

    Also mentioned above, the Positive Crankcase Ventilation system tends to dump a lot of oil and gunk into the intake manifold, possibly accelerating the the EGR clogging.

    The EGR also has passageways going through the intake manifold, and they clog as well.
     
    #6 Mendel Leisk, Oct 14, 2019
    Last edited: Oct 14, 2019
    Raytheeagle likes this.
  7. JJC123

    JJC123 New Member

    Joined:
    Oct 13, 2019
    3
    2
    0
    Location:
    Chicago
    Vehicle:
    2010 Prius
    Model:
    N/A

    I just go to the dealership and have them to a check up every 6 months. This is the first time that’s happened.
     
    Mendel Leisk likes this.
  8. Mendel Leisk

    Mendel Leisk Titanic Social Director

    Joined:
    Oct 17, 2010
    35,689
    24,537
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    It's getting to where the only way third gen ownership is viable is if you're a game DIY'r. Ok, one alternative: a reasonably priced shade-tree mechanic who makes house calls, and is willing to learn. Or, an evangelistic Priuschatter that holds EGR "clinics". On the west coast @Raytheeagle has been coaching people through this, has it down to a 4~5 hours for the EGR. And maybe 2~3 hours for the intake manifold.

    The dealerships and Toyota have effectively turned their backs on the EGR issue. Have a read and check out the links:

    The simplest way to see where you're at, is to check the degree of carbon build up in the EGR pipe, a stainless steel connecting pipe between the EGR valve and intake manifold. Watch @NutzAboutBolts video #16 here:

    Nutz About Bolts Prius Maintenance Videos | PriusChat

    Two or three other videos linked there too, for the full cleaning of the intake manifold, full EGR clean, and Oil Catch Can install.

    Good thread:

    EGR & Intake Manifold Clean Results | PriusChat

    Another:

    Oil Catch Can, Eliminate that knock! | PriusChat

    Some tools worth having:

    E8 Torx socket (mandatory)
    E6 Torx socket (optional, but good to have, to remove the throttle body studs from intake manifold)
    3/8" ratchet wrench, regular and long handle, flex head, you can never have enough (or 1/2 plus reducer)
    1/4" ratchet wrench, or 3/8" to 1/4" reducer
    Ratchet extensions: you can never have enough
    Long needle nose piers, straight and bent tip
    Ratcheting 12mm box wrench (optional, but makes disconnection of the EGR cooler from exhaust easier)
    Torque wrench (3/8" and 1/4" both good to have)
    Floor jack and safety stands (or ramps): basically some method to raise front, if you need to take underpanel off, which you may need to, both for access and to recover dropped items.
     
    RMB and NutzAboutBolts like this.
  9. JJC123

    JJC123 New Member

    Joined:
    Oct 13, 2019
    3
    2
    0
    Location:
    Chicago
    Vehicle:
    2010 Prius
    Model:
    N/A
    Thank you all for replying and your help! In the end, I took my car to the dealership today. It was the EGR, which they replaced as well as well as another part. It turns out they my car qualified for an extended warranty, which covered the cost of both the part and work! (Which I didn’t expect since the car is already almost 10 years old.
     
    bisco likes this.
  10. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    83,130
    36,262
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    with no dash lights on?

    wow, congrats!(y)
     
Loading...