Where are the spark plugs on a 1997 Lincoln mark VIII?

Answer 1

The 97-98 Mark VIII used a coil on plug system. There is no distributor and subsequently, no spark plug wires. On the valve covers you will see a panel that is held to the top of each cover with two 10mm bolts. On the drivers side you can simply loosen the bolts and remove the panel exposing the coils. Carefully unplug each coil connector and then very carefully pull the coil up and out of the valve cover. Then you will need a 5/8 spark plug socket and a 10" extension to reach all the way down to the plug. DO NOT ATTEMPT TO DO THIS WHEN THE ENGINE IS EVEN SLIGHTLY WARM!!!! Only remove plugs when the engine is completely cold! Use anti seize on the threads of the new plugs being installed, and dielectric grease on the top of each plug where the coil will plug onto it. Gap the plugs at .056. On the passenger side of the engine you will have to remove the air intake tube before you can get the panel covering the coils off. The intake tube is held on by two clamps, one at the air filter box at the front of the vehicle and the other at the throttle body. Before trying to pull the tube out after loosening the clamps, you need to unplug the electrical connector on the sensor and the tube for the PCV valve which are both protruding from the air intake tube. DO not over-tighten the plugs when installing and make absolutely certain that the air intake tube is reinstalled with NO distortions in the rubber seals at each end wherer the clamps go, and make sure the clamps are TIGHT! Any sort of air leak at these clamps will result in a poor running car.