Ford Q&AAsk Your Question
2002 Ford F-150 Lightning Question: changeplugshowto
Bret Bodas February 25, 2010, 13:04Master
Answer #2Visitor, August 14, 2010, 21:37
I cannot see the spark plugs or how to get to them in my 2002 5.4L Lightning
Answer #3Gr8ride March 06, 2011, 19:27Rookie
Remove air intake boot and top of air box for easier access. Remove power steering reservoir bracket 8 MM socket and extension. To remove coils 7 mm bolts are easiest removed with 1/4 drive 7 MM socket, universal wobbly and extensions. Remove coil bolts, unplug coils by squeezing tab and pulling on connector. Turn coils slightly and remove coils around fuel rail. No need to remove fuel rails! The coils will come out! Once coils are out it is best to blow out spark plug holes with air to make sure no debris falls into cylinder. Spark plug removal takes 5/8 socket universal and 3- 4 inch extension for back plugs and longer can be used for the front and middle ones. Remove plugs. Check new plug gap dealer recommends .052-.056in. I suggest anti seize on threads of spark plugs. Just a little dab on the treads, don't get it on the electrode. Some people are against anti seize but I like it, that is up to you. Reinstall plugs until snug. Dealer recommends 13 ft lbs. This really is not very much. It is known that some heads have fewer threads in the cylinder head for the spark plugs. Don't tighten plugs to much or you can strip the treads out. Do not leave them to loose or you can have a plug and coil blow out. The rest of the procedure is just reversing what you have taken apart. I have never had a blow out or stripped hole and can do the job in about 30 minutes give or take. The first time is always the hardest. Do this when the engine is cold or the plugs could loosen back up.