.60 is the stock gap
Remove the spark plug wires from your 2002 Mercury Grand Marquis spark plugs. Remove the spark plugs by turning them to the left with a deep well 5/8 socket. Reverse the process to install the new spark plugs.
Generally I change platinum plugs at 100K and regular plugs at 50K.
Disconnect the battery, remove the spark plug cables and the boots and remove the spark plugs. Put in the new spark plugs, replace the cables and boots, and then connect the battery.
Remove the coil on top of the plug, they are there.
you change them like every thing else
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You can find the spark plugs for your 2002 Nissan Pathfinder on each side of the engine. The spark plugs will be near the top of the engine. A six-cylinder engine will have three spark plugs on each side.
Platinum spark plugs, 100K. Standard spark plugs, 50K.
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