1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Parts list for EGR and Intake Manifold Cleaning?

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by lrisius, Jan 25, 2022.

  1. lrisius

    lrisius Member

    Joined:
    Aug 23, 2015
    120
    56
    0
    Location:
    Illinois
    Vehicle:
    2015 Prius v wagon
    Model:
    Three
    I'm starting to plan for doing the EGR valve/cooler and intake manifold cleaning in a few months. I'll also do the spark plugs while I am in there. I've watched some of the videos and read some of the threads and I haven't seen any mention of replacing gaskets or seals. Is is normally ok to just reuse the old ones? Or are there ones that it would be good to replace?
    Thanks!
     
  2. ColoradoBoo

    ColoradoBoo Senior Member

    Joined:
    Jul 19, 2019
    903
    593
    4
    Location:
    Monument, Colorado USA
    Vehicle:
    2017 Prius
    Model:
    Two
    The only gasket I know of around that are are on the intake manifold but you don't need to remove it to replace the plugs or clean the throttle body.

    I don't know about the EGR valve but you'll want to get a can of throttle body cleaner and a can of MAF sensor cleaner. (Make sure it specifies that on the cans.) I just cleaned my wife's 2017 Prius last summer and it has a little crud in there but not too bad. Before you start, disconnect the negative battery terminal. There's a computer that controls the butterfly flap but it's okay to gently and slowly move it up with a soft instrument or your finger so you can put a rag you sprayed with the cleaner and wipe it all out. Just keep cleaning all around and include the edge of the butterfly flap until the rag comes out clean.

    For the plugs, get the OEM iridiums from Toyota and remove when the car is warm, not hot or cold, works best with the aluminum head. Do everything by hand, no power tools and then you'll need to torque when installing the new plugs. This tool works great: LEXIVON 5/8" Swivel Magnetic Spark Plug Socket, 3/8" Drive x 6" Total Length | Enhanced Magnetic Design With Thin Wall Socket, Cr-v Steel (LX-121)

    I've heard some say the car might run a little rough after doing these jobs but the computers will figure it out pretty quick. I haven't seen it in the few Toyota's I've done but did see it in my friend's old Suzuki I worked on with him...ran strange for about 30 minutes.


     
    vvillovv likes this.
  3. lrisius

    lrisius Member

    Joined:
    Aug 23, 2015
    120
    56
    0
    Location:
    Illinois
    Vehicle:
    2015 Prius v wagon
    Model:
    Three
    Thanks. That swivel is a cool looking tool and I can see where that would really help.
     
  4. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    23,073
    14,981
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    The gasket between the manifold and the head is the fat silicone kind, which you can (usually) get away with reusing in a pinch. But replacing it is a good idea; it does get a little bit hard and flat after it's been there some tens of thousands of miles.

    The small one between the manifold and EGR pipe is the same kind. The ones between the rest of the EGR components are flat metal gaskets you can probably also get away with reusing if they're in good condition.
     
  5. xliderider

    xliderider Senior Member

    Joined:
    Apr 19, 2012
    7,842
    3,099
    0
    Location:
    Honolulu, HI
    Vehicle:
    2011 Prius
    Model:
    Three
    What is the mileage on the odometer?

    I wouldn't change the sparkplugs unless you are past 120k miles. It's a pain to take off the windshield cowling, but you need to do it for the EGR valve and cooler anyway.

    Posted via the PriusChat mobile app.
     
  6. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,474
    38,106
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    How many miles on it? FWIW at 70k kms when doing EGR cleaning, I replaced nothing, and have had no subsequent issues.

    OTOH, over 100k miles, probably good to change all the pliable gaskets on the intake manifold, at interface with:

    Engine intake ports
    Throttle body
    EGR pipe
     
  7. lrisius

    lrisius Member

    Joined:
    Aug 23, 2015
    120
    56
    0
    Location:
    Illinois
    Vehicle:
    2015 Prius v wagon
    Model:
    Three
    I'll be at 100k miles so it seems like a good time to do the all the work. It may be a little early for the plugs but it seems like a good time given the amount of disassembly I'll need to do anyway.

    Thanks everyone!
     
    Mendel Leisk and ColoradoBoo like this.