Car Questions
RepairPal is your advocate for car care advice and guidance

Were are the spark plug located?

(1999 Lincoln Navigator)
in Grand Rapids, MI on March 30, 2009
How can I replace the spark plug on my 1999 navigator
Displaying 2 answers & 1 comment
Popular Answer
on May 25, 2010
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.

Sign in to reply
on April 12, 2013
is it normal when you pull the plugs out for the Sockets an extentions to be dripping oil like fluid, The navigator I bought the guy has owned since it had 40,000 miles on it and now it has 217000 on it and the plugs have never been changed, it runs fine with a little miss here and there, so we started with the plugs and that's what we are seeing while changing the plugs on the drivers side.
on March 31, 2009
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.
Sign in to reply
Get a repair estimate
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide.
Or interested in getting a repair? Find a Shop

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
A mechanic says it sound like the blend door. how can we check without taking middle casing out between seats.
Part is attached to axle other part hanging on trailing arm.
Didn't find what you were looking for?