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Thread: Stuck spark plug

  1. #1
    Join Date
    May 2012
    Milwaukee, WI

    Default Stuck spark plug

    Any advice on a spark plug that won't budge? 3 out no problem, #4 barely moved and I don't want to break something. 99 Pontiac 2.4L 4 cylinder.

  2. #2
    Join Date
    Dec 2011
    Washington State


    It's probably because of carbon build up at the end of the threads. Work it back and forth slowly using something like PB Blaster when it is at it's loosest and let it sit for a while for the product to "creep" down the threads and loosen the carbon. Use synthetic engine oil or a small amount of silver Anti seize on the threads when reinstalling.
    20+ years ASE and Honda Master Tech

    1998 black 6 spd convertible

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