What has to be taken off the engine before you can access the spark plugs for removal. What is the procedure?
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2003 Lincoln Navigator Question: How do you replace sparkplugs?
Answer #1patrick mannion from Greg Solow's Engine Room, January 09, 2010, 14:29Master
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Visitor, March 30, 2010, 21:00
Your plugs are found under what looks like valve covers. Two bolts hold down these covers. Alot to remove like hoses or if you can twist the cover around.Air filter canister must be removed. Then you will see the coils, 4 in a row, because one for each cylinder right:) Be careful now and unclip the wire harness connector to each coil;Do not confuse which connector goes to which coil/cylinder.With fingertips reach as low as possible around coils, they are round and have long rubber insulators attached to tip of spark plugs.You may have to work these alittle to remove. Now you are down to the plugs.PLEASE be sure the engine is cool!!! The plug is steel where as your cylinder is aluminum. You know what happens with two different metals, right!!!?? And dont strip the threads in the block either!!