Stop in for a cup of coffee

@Mattax @halifaxhops

Anyone know what would cause this type of carbon bridging on one of Dads plugs? The rest of the plug looks damn near unused

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I've seen similar before. Valve covers on Fords 2.8 and 2.9 V6 leaked bad. Tip of plug might drag through the sludge build up when going toward the hole.