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Spark Plugs and Wires
Timing and Firing Orders
Lincoln Navigator
How To

How to remove spark plugs on a 2004 Lincoln Navigator?


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October 14, 2010 1:51PM

One at a time, checking your gap on each plug and putting never-seize on the threads. Make sure you change the plugs on a cold engine, there is a problem with them breaking off inside the block.