Opinion on these Spark Plugs

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  • Idrisu
    Advanced Member
    • Jul 2015
    • 173

    #1

    Opinion on these Spark Plugs

    Do these spark plugs look normal for about 1500 miles?


  • flyboyx
    R3V OG
    • Sep 2008
    • 8371

    #2
    They look awfully clean to me
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    • estoguy
      E30 Enthusiast
      • May 2013
      • 1087

      #3
      Look fine to me.
      Estoguy
      1986 BMW 325, Alpenweiss ~ "Elsa"

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      • MrBurgundy
        R3V Elite
        • Mar 2012
        • 5301

        #4
        It looks like the fifth one looks like it has a fair amount of carbon buildup on it. Check for a crack in your distributor cap
        Current Collection: 1990 325is // 1987 325i Vert // 2003 525i 5spd // 1985 380SL // 1992 Ranger 5spd // 2005 Avalanche // 2024 Honda Grom SP // 2024 Yamaha XSR700 // 2024 Jeep Gladiator Rubicon

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        • ForcedFirebird
          R3V OG
          • Feb 2007
          • 8300

          #5
          They look good. M20's seem to run naturally lean when bone stock.

          Originally posted by MrBurgundy
          It looks like the fifth one looks like it has a fair amount of carbon buildup on it. Check for a crack in your distributor cap
          Leaky rings do the same, too.
          john@m20guru.com
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          • MrBurgundy
            R3V Elite
            • Mar 2012
            • 5301

            #6
            Originally posted by ForcedFirebird
            They look good. M20's seem to run naturally lean when bone stock.



            Leaky rings do the same, too.
            They would be wet with oil if the rings were leaky, but yeah, they really do look fine. Checking the dist cap is quick and you never know, you might find a tiny crack.

            As long as they're not carbon fouled to the point were its super black, wet with oil or smashed you're fine
            Current Collection: 1990 325is // 1987 325i Vert // 2003 525i 5spd // 1985 380SL // 1992 Ranger 5spd // 2005 Avalanche // 2024 Honda Grom SP // 2024 Yamaha XSR700 // 2024 Jeep Gladiator Rubicon

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            • bmwtool
              Member
              • Sep 2016
              • 72

              #7
              Toasty brown = good.

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