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On this vehicle, the spark plugs are located under the individual Ignition Coils. The coils will need to be removed first, to access the plug. On this engine, there is also a "known problem" while removing the spark plugs. The plugs, on some engines, have a tendancy to seize themselves in, and during removal have a chance of breaking, leaving part of the plug still inside the cylinder head. Use extreme caution, and follow the procedure below as closely as you can!
To remove spark plugs without damage, it is necessary to adhere exactly to this procedure before removal is attempted.
CAUTION DO NOT REMOVE PLUGS WHEN THE ENGINE IS WARM OR HOT. THE ENGINE MUST BE AT ROOM TEMPERATURE WHEN PERFORMING SPARK PLUG SERVICE. REMOVING THE SPARK PLUGS FROM A WARM/HOT ENGINE INCREASES THE CHANCE THE THREADS COULD BE DAMAGED.
Spark Plug Removal Procedure
CAUTION EXCESSIVE MOTORCRAFT(R) CARBURETOR TUNE-UP CLEANER, OR REPEATING THE PROCESS SEVERAL TIMES WITH TOO MUCH CLEANER FLUID, COULD INTRODUCE ENOUGH LIQUID VOLUME TO HYDRO-LOCK THE ENGINE.
CAUTION DO NOT USE AIR OR POWER TOOLS FOR SPARK PLUG REMOVAL. SPARK PLUGS MUST ONLY BE REMOVED WITH HAND TOOLS.