1999 Lincoln Navigator Q&A
1999 Lincoln Navigator Question: were are the spark plug located?
Looks like your navigator has coil over plug system and you have one ignition coil over each spark plug, Its quite a job the book shows 3 hours of labor. - hemicuda
The plugs are located under a cover on the top side of the valve cover. To change the plugs 1) passenger side, disconnect battery. Remove the electrical wiring deal against the firewall. This is a box and a a electrical connection with 2 wires from battery. 2) On the valve cover area, remove two bolts, the one behind the cover area by the firewall is burried under hosed. 3) The panel will lift up exposing the 4 Coil over plug sets. Remove the wiring connection, pull the coil over plug unit out. 4) Clear out the hole as best as you can. Use a blow gun, sucker what ever you can . You don't want stuff going into your engine. 5) Remove plug. Install new plug. USE ANTISIEZE! on threads and recommend dielectric Grease on plug electrical connection 6) Repeat for all plugs. 7) On Drivers side remove the power steering fluid reservoir and the nut holding the bracket tight. and repeat remove the cover and do the plug. Tools. 3/8s socket set with a LOT of weeble wobble extensions and universal joint. - Visitor
need to find location on spark plug