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

2010 prius spark plug tube seal replacment

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by hardish, Mar 16, 2019.

  1. hardish

    hardish Junior Member

    Joined:
    Dec 12, 2013
    54
    0
    0
    Vehicle:
    2001 Prius
    Model:
    N/A
    Replaced spark plugs and found some oil in #4 plug. Any instructions on how to change the tube seal?
     
    #1 hardish, Mar 16, 2019
  2. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,710
    38,247
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Do you mean seal of the tube to the cylinder head?

    I was just reading about that, in one of my cylinder head refurb pdfs, repair manual excerpt. It specs the sealant and instruction for tapping it in.

    Can post in a bit.
     
    #2 Mendel Leisk, Mar 16, 2019
  3. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,710
    38,247
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    It's in this, page 15 (of 20):
     

    Attached Files:

    #3 Mendel Leisk, Mar 16, 2019
    wvs2003 likes this.
  4. wvs2003

    wvs2003 Junior Member

    Joined:
    Jan 20, 2019
    12
    59
    0
    Location:
    USA
    Vehicle:
    2013 Prius
    Model:
    Three
    @hardish , did your sparkplugs look like mine shown in below pics?

    I am not sure if i have this tube seal problem which leads to oil on the plug. I am not even sure if the residue on my spark plug's thread is oil. I thought the oil came from having oil coming from PCV valve, PCV hose, into Air Intake Manifold, and then into engine.
    160081_20190120_172707.jpg 160082_20190120_172824.jpg 160083_20190120_172905.jpg
     
    #4 wvs2003, Mar 16, 2019
  5. The Critic

    The Critic Resident Critic

    Joined:
    Oct 28, 2005
    3,193
    2,319
    0
    Location:
    CA
    Vehicle:
    2011 Prius
    Model:
    Three
    Most likely, you have a leaking spark plug tube seals. There are 4 seals inside the valve cover which block oil from entering the tube. They are a pain in the butt to change.

    I have a set of 4 leftover from my engine overhaul gasket kit if you want them. Mine were not leaking (and they are easily accessible later on) so I elected to not change them.
     
    #5 The Critic, Mar 18, 2019
    Raytheeagle likes this.
(You must log in or sign up to post here.)