Lincoln Navigator Repair and Maintenance

A guide to problems, costs, maintenance and repair for your Lincoln Navigator

Lincoln Navigator Problems

Check Engine Light due to Water/Coolant in Spark Plug Recesses

An illuminated Check Engine Light may be caused by an engine misfire due to water or engine coolant in the spark plug recesses.

Spark Plugs May be Difficult to Remove

Our technicians tell us the spark plugs in this engine can be very difficult to remove. Ford has issued a service bulletin (08-7-6) to address this issue, which includes a recommended procedure on how to remove the plugs. Failure to follow the recommended procedure can result in the one or more spark plugs breaking off in the cylinder head.

The recommend procedure is as follows. Using this procedure will greatly reduce the chance of breaking a spark plug.

1. Break the spark plugs loose when the engine is warm.
2. Turn each plug 1/8 to 1/4 turn and soak the treads with 1/2 to 3/4 teaspoon of Motorcraft Carburetor Tune-Up Cleaner or a quality penetrating oil. Do not try to remove the plugs at this time.
3. Let the threads soak for at least 15 minutes.
4. After the soak period, tighten and loosen each spark plug, working it back and forth until the turning effort is reduced. Then, you can remove the spark plug.

There are special tools available to remove the broken spark plugs and repair shops will often charge additional labor time, over and above the quoted spark plug replacement cost, for the removal of each broken spark plug.

Problems With EGR System are Common in High Dust Areas

In high dust areas, problems with the EGR system are common. The filter for the EGR solenoid may plug and cause the EGR to activate when it should not; this can cause the engine to stall. The dirty filter should be replaced to correct this concern.

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Lincoln Navigator Questions

did i mess up my engine?? (1 answer)

Engine light came on, i ignored it cause last time it was a sensor something simple. we also recently changed the oil. my truck was running hard so i checked all my fluids and no oil. my oil gauges were normal but nothing on dip stick i put one oil in and ran it, it ran fine picked up speed like ...

None of the windows,moonroof,quarter panel windows or stereo work. Have any idea (1 answer)

All these things stop working all of a sudden. The switch to move the side view mirrors, switches for all windows,sunroof,quarter panel window.Also the stereo stopped working. The switch for power lock works and all other electrical component works fine. I checked all the fuses under the hood a...

My truck overheated and it is pouring water out on the top and on the back side of the heater core but I can't find a hole in any hose (2 answers)

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Lincoln Navigator Recalls

Automatic Transmission Shifts To First Gear Unexpectedly

The vehicle's automatic transmission may shift unexpectedly and suddenly into first gear while driving, which can result in a loss of vehicle control, sudden slowing of the vehicle and possible transmission damage. Dealers will reprogram the powertrain control module with updated software free of charge to resolve the concern.

Reverse Gear Engagement and/or Lighting Issues

Certain vehicles may have been assembled with a transmission range sensor (TRS) that was calibrated out of specification for reverse gear. If this condition exists, the transmission may not properly engage reverse gear and/or if reverse gear does engage, the "R" indicator on the dash or the backup lamps may not illuminate. These conditions increase the risk of a crash or a pedestrian being struck due to the vehicle's not signaling it is in reverse. Dealers will inspect and replace the transmission range sensor as necessary to correct this concern. The Ford recall number is 12C23.

The Right Side, Second Row Seat Head Restraint May Fail

These vehicles may have inadequate welds on the head restraint support brackets for the second row, right side seat. In the event of a crash, the head restraint may not provide adequate protection, increasing the risk of personal injury. Dealers will replace the head restraints as necessary to correct this concern. The Ford recall number is 12C22.

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Lincoln Navigator Reviews

I have had to rebuild my Transmission and Motor.!!! The truck is currently at Five Star Ford having the fuse panel replaced due to poor design where the panel is taking in water burning out the main relay switch. The automatic door locks stopped working. Due to water leaking in.. the sun roof stopped working. This truck is like some women..they may look good but inside she ugly. More trouble th...
We got the Navigator new. It is a wonderful truck but I'd say over the past couple of years we spent money getting few things all fixed on it. Changed four set of brakes, battery drained due of having the lights remaining on and leak in exhaust plus add we had to spend good bit on new catalytic and get emission system repairs. So far engine and tranny both have been great at 180,876 miles still...
I have a 1999 Lincoln Navigator too and I am having a problem with the lights staying on, battery drain, etc. We think we may have figured out the problem. We are finding that the rear hatch releases on its own, thereby turning the lights on and draining our battery.

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