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  • Spark plugs

    Can anybody tell me about a C-16C Champion spark plug? I inherited a set with my PU. They have an electrode similar to 3X and hex size is the same.
    Attached Files

  • #2
    I've run the successfully for many years, no complaints. Depends on your engine components & driving style tho.


    • #3
      If I remember correctly the C-16C replaced the C-4 that replaced the 3X.


      • #4
        The C-16C was replaced by the W-16Y, which is a colder plug than the 3X
        3 ~ Tudor's
        Henry Ford said
        "It's all nuts and bolts"

        Mitch's Auto Service ctr


        • #5
          I think now replaced by number 561. I run 518 (W18) heat range plugs for the H.C.head. Nice tan color.


          • #6
            I've always run Motorcraft TT10 plugs, even with a HC head. They like to be at home in a hard working engine. Nice tan colour after towing the camper or a long, fast run.


            • #7
              VFF spark plug tech thread

              3 ~ Tudor's
              Henry Ford said
              "It's all nuts and bolts"

              Mitch's Auto Service ctr


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