[EX-T] : Changed Spark Plugs - noticed some oil
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Thread: Changed Spark Plugs - noticed some oil

  1. #1
    Newbie
    Join Date
    May 2019
    Posts
    3

    Question Changed Spark Plugs - noticed some oil

    Hey all,

    So I changed spark plugs on my Optima 2013 Turbo. I used the NGK 1422, and I can definitely notice a pretty big improvement on both throttle response and Fuel Economy. Heck, my idling RPM went down to 800-1000 RPM (from 1200 or so).

    Anyway, this was my first time changing spark plugs myself, and I'm a fairly new DIYer as well. So here's the question.
    After removing the ignition coils to gain acces to the plug, I noticed a very minute amount of what seemed like oil on the rubber surrounding the coil. Once I removed the spark plug, it also seemed like the threads on the old plugs also has some small amount of oil on them. Is this normal - if not what could be the reason? I didn't see any obvious leaks (from a very quick visual inspection).

    Thanks!

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  3. #2
    Certified Wrench Monkey
    Join Date
    May 2015
    Location
    NJ
    Posts
    896
    Year
    2011
    Make
    Kia
    Model
    Optima
    Trim
    EX-T
    Very unusual that changing spark plugs would cause a lower idle, better throttle response along with better performance, a combination I have never seen. Having said that, oil accumulation in that area could be due to a leaking valve cover gasket.

  4. #3
    Learner's Permit
    Join Date
    Oct 2013
    Location
    Hamilton, ON
    Posts
    220
    Quote Originally Posted by Tetsukei View Post
    Hey all,

    So I changed spark plugs on my Optima 2013 Turbo. I used the NGK 1422, and I can definitely notice a pretty big improvement on both throttle response and Fuel Economy. Heck, my idling RPM went down to 800-1000 RPM (from 1200 or so).

    Anyway, this was my first time changing spark plugs myself, and I'm a fairly new DIYer as well. So here's the question.
    After removing the ignition coils to gain acces to the plug, I noticed a very minute amount of what seemed like oil on the rubber surrounding the coil. Once I removed the spark plug, it also seemed like the threads on the old plugs also has some small amount of oil on them. Is this normal - if not what could be the reason? I didn't see any obvious leaks (from a very quick visual inspection).

    Thanks!
    Call your dealer and ask. I would assume its a dielectric lube(think thats whst they call it) around rubber and anti seize on threads of plugs.

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