Question about 2003 Mercury Grand Marquis

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How do I change the spark plugs? Where are they? On the side, or under the big cover?

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Take the large plastic cover off, the spark plugs are in the top side of the valve covers, need to remove the coils, each sparkplug will have its own coil which is held in by a bolt, then use socket and extension and remove plugs.

Posted on Apr 05, 2011

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