Power Hungry Performance Forum - Before Changing Your Spark Plugs Read This TSB

Don't wait to change your sparkplugs @100,000 miles.
Ford is now recomending the change interval @30,000-40,000 miles.
Please read TSB:
TSB 08-7-604/14/08SPARK PLUG REMOVAL INSTRUCTIONS -
4.6L3V/5.4L 3V16.8L 3VFORD:2005-2008 Mustang2004-2008 F-1502005-2008 Expedition, F-Super Duty2006-2008 Explorer,F-53 Motorhome Chassis2007-2008 Explorer Sport TracLINCOLN:2005-2008 Navigator2006-2008 Mark LTMERCURY:2006-2008 MountaineerThis article supersedes TSB 08-1-9 to update Vehicle Applications, Service Procedure and Part List.ISSUESome 2004-2008 F-150, 2006-2008 Mark LT, 2005-2008 F-Super Duty, Expedition, and Navigator, with 5.4L 3-V engine; 2005-2008 Mustang, 2006-2008 Explorer, Mountaineer, and 2007-2008 Explorer Sport Trac with 4.6L 3-V engine; 2005-2008 F-Super Duty, 2006-2008 and F-Stripped Chassis, with 6.8L 3-V engine may experience difficulty with spark plug removal. This may cause damage to the spark plug and leave part of the spark plug in the cylinder head. Affected engine build dates are as follows: 5.4L 3-V and 6.8L 3-V before 10/9/07, 4.6L 3-V before 11/30/07.ACTIONRefer to the following Service Procedure for techniques to remove the spark plugs and extract broken spark plugs.SERVICE PROCEDUREThe engine build date can be read on the left hand cam cover information sticker.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 Procedure1. Remove the coil-on-plug assemblies and thoroughly blow out the spark plug wells and surrounding valve cover area with compressed air.2. Back out the spark plugs no more than 1/8 to 1/4 of a turn. Using Motorcraft(R) Carburetor Tune-Up Cleaner, fill the spark plug well just above where the jamb nut hex sits (1/2 - 3/4 teaspoon). A minimum period of 15 minutes of soak time is required. The cleaner will wick down to the ground electrode shield and soften the carbon deposits in this time. DO NOT WORK the spark plug back and forth at this point.NOTE COMPLETELY REVIEW THE PRODUCT LABEL FOR THE MOTORCRAFT CARBURETOR TUNE-UP CLEANER PRODUCT - USE AT ROOM TEMPERATURE AND SHAKE WELL.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.3. Tighten, and then loosen the spark plug, working the plug back and forth. Some screeching and high effort may be noticed. The expected removal torque is about 33 lb-ft (45 N.m). Repeat the back and forth turning as needed until turning effort is reduced, and remove the spark plugs.NOTE NEW PLUGS SHOULD BE INSTALLED USING A FILM COATING OF MOTORCRAFT HIGH TEMPERATURE NICKEL ANTI-SEIZE LUBRICANT ON THE GROUND ELECTRODE SHIELD. DO NOT COAT THE ELECTRODE STRAP. (Figure A couple of tips-The truck needs to be completely cold, meaning it must sit for at least 8 hours before starting to do the work.Use the Motorcraft Carb cleaner, it works better than anything out there to melt the carbon.Make an adapter for your shop vac so you can suck any carb cleaner or debris from the cylinder out the spark plug hole. I got a pcv reducer from the harware store and step it down to a hose I can put in the clyinderChange your oil after changing plugs to remove any carb cleaner that gets past the rings.Do not wait 100k miles to change your plugs, if you do it every 30-40k miles, you will never break one and face that misery.Only Motorcraft and Autolite have the correct heat range plugs for Triton engines.