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Thread: Spark plug wrench

  1. #1
    Join Date
    Jul 2014
    Lafayette, Colorado

    Default Spark plug wrench

    For those hard to reach plugs on a flat head with aluminum heads. I bought a shower valve tool that had one end (29/32") that was a close fit for the 7/8" (28/32") hex of a Champion #D16 spark plug.
    I sawed the 4" long tool in half, then pressed 5/8" nut (15/16" hex) half way into the sawed end. When finished, the tool fits in under the oil tank and slips onto the plug. Use a 15/16 wrench on it.
    Sparkplug (.875 Hex) Socket .jpg

  2. #2
    Join Date
    Aug 2007


    We cut a spark plug socket with a hex top so that it would fit. Needed to drill the 1/2" square hole for the handle so that it was big enough for the spark plug to go through it. Works fine on Harley and Indian.
    George Tinkham
    Springfield, IL

    1941 Indian 841
    1948 Indian Chief
    1956 H-D KHK
    1960 CH
    1964 BMW R69S
    1966 Honda Touring Benly (aka "150 Dream")
    1984 Moto Guzzi V65Sp

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