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  1. #1
    Scraps
    Join Date
    Apr 2007
    Location
    Havertown, PA
    Posts
    9,686

    Tool for Gapping Iridium Plugs

    Changing plugs in a 200 Pro XS. I've used a couple different tools one of which do I think are good and safe for the iridium plugs. I hear guys swear by the pliers, some don't, etc. What is the best for a dense German, bull in a china shop like me?
    2017 Phoenix 819
    2016 200ProXS, s/n 2B359849, Mod 1200P73BD

  2. Member
    Join Date
    Jan 2016
    Location
    Bangs, TX
    Posts
    559
    #2
    Use ONLY, repeat- USE ONLY A WIRE GAUGE WHEN GAPPING IRIDIUM PLUGS!

    Plug gap should be checked via the "Go-and-No-Go Method". NEVER exert even the SLIGHTEST amount of force between the firing pin and the arm, as this will almost certainly destroy/damage the plug.

    ANY gap adjustment must be made via a tool that securely grasps the ARM, and manipulates it without ANY CONTACT with the electrode or firing pin (and it's surrounding porcelain).

    Very important- GRASP PLUG BY IT"S METAL HEX CENTER when gapping. Do not hold the PORCELAIN PORTION, or you will likely fracture the plug while gapping.

    Example of fractured plug:



    When installing plugs, a LIGHT coating of Anti-Seize on the plug threads is wise. Emphasis on LIGHT COAT.

    Spark plugs should be installed with a piece of fuel line (to prevent CROSS-THREADING), and should be TORQUED WITH A TORQUE WRENCH.