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

How many miles did you get from your 'original' spark-plugs???

Discussion in 'Gen 2 Prius Main Forum' started by ski.dive, Jun 28, 2019.

  1. ski.dive

    ski.dive Active Member

    Joined:
    Jun 11, 2008
    863
    223
    0
    Location:
    Hutchinson Island,FL. Mt. Snow,VT
    Vehicle:
    2008 Prius
    How many miles did you get from your 'original' spark-plugs???
     
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,571
    48,862
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    120,000
     
  3. Skibob

    Skibob Senior Member

    Joined:
    Sep 14, 2018
    2,912
    1,494
    0
    Location:
    Northern California
    Vehicle:
    2006 Prius
    Model:
    N/A
    I don’t know I’m not the first owner. How many miles did you get?
     
  4. cthindi

    cthindi Member

    Joined:
    May 8, 2009
    177
    85
    0
    Location:
    Connecticut
    Vehicle:
    2005 Prius
    Model:
    N/A
    I changed mine at 125K and then at 250K. Still on the third pair at 360K. The changes were all preventive and none had failed. I would not be surprised if those have lasted for 200K or more for anyone.
     
  5. Graeme1949

    Graeme1949 Member

    Joined:
    Oct 20, 2014
    51
    47
    0
    Location:
    Atlanta, GA
    Vehicle:
    2004 Prius
    Model:
    Two
    193,000. They should have been changed at 120,000 but the dealer doing the service for me must have overlooked it.


    -Graeme-
    2004 Prius with >190,000 miles.
    Sent ?.
     
  6. royrose

    royrose Senior Member

    Joined:
    Mar 21, 2009
    1,389
    947
    4
    Location:
    Foot of Pikes Peak
    Vehicle:
    Other Hybrid
    Model:
    Limited
    If you look closely at the service manual, it says to change them at 120,000 miles but then in small print says the interval in carb states states is 150,000. That suggests that the 120,000 interval is due to emission standards in non carb states and that the plugs can last at least 150,000. Of course, no harm in changing at 120,000. From the service manual:

    Prius PlugCapture.JPG
     
    #6 royrose, Jun 29, 2019
    Last edited: Jun 29, 2019
  7. Kenny94945

    Kenny94945 Active Member

    Joined:
    Mar 24, 2016
    758
    387
    0
    Location:
    Sausalito
    Vehicle:
    2016 Prius v wagon
    Model:
    Four
    FWIW It is an old recommendation to remove and inspect plugs every 5 years to prevent an electrolysis bonding between the plugs and the heads. Noting many plug manufacturers' now say the plugs composition prevent this....but I am old school.

    Modern hi tech metal plugs will go 100K miles.
    Owners manual is says 120K miles...wow.

    Guess it all depends on your budget if no drivability issues.
    Myself, as I am crazy, I'd change at a 70K inspection or 5 yrs.
    Labor is easy and plugs can cost less than $10 a piece.
    Noting to take patience/ care with the plug wires, to avoid damage to the wires.
    The inspection is the wear (shape: retaining the sharp edges and looking for pitting) from spark/ electricity on the plugs electrodes and of course gap....reading the plugs porcelain in a Prius I'd think is unnecessary....just replace the plugs as you labored into the project.
    I am also a fan of using torque wrenches, die-electric grease and anti seize compound.

    Again FWIW.
     
    donbright likes this.
  8. ski.dive

    ski.dive Active Member

    Joined:
    Jun 11, 2008
    863
    223
    0
    Location:
    Hutchinson Island,FL. Mt. Snow,VT
    Vehicle:
    2008 Prius
    [QUOTE="Skibob, post: 2909158, member: 168247How many miles did you get?[/QUOTE]

    I only have 112k original miles [2008 Prius]...I'm going to wait until 150k to change the plugs.
     
  9. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,571
    48,862
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    i would pull and grease them, they can be buggers
     
  10. donbright

    donbright Active Member

    Joined:
    Feb 17, 2018
    241
    149
    33
    Location:
    oklahoma
    Vehicle:
    2007 Prius
    Model:
    Two
    I bought my 12 year old Prius at ~182,000 miles and some of the plugs really did not want to come out, it was a struggle to remove them safely and required a lot of helper juice (cant remember what we used, some kind of penetrating oil maybe). Also the one on the end at the drivers side had rust in the top of the hole... IIRC priuschat had some threads about this being a known defect with the water diversion rubber between the hood and window, which was later fixed.... but it seems like some Priuses might be out there still drippin'