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2006 Lincoln Navigator Problems

 

Corrosion on Battery Cable Ends

Verified for the Lincoln Navigator

Check the battery cable ends frequently for corrosion. Corrosion can easily migrate under the cable insulation and cause numerous electrical faults and drivability issues.

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Overheating Due to Damaged Water Pump

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Erratic engine coolant temperature or intermittent overheating can be caused by corrosion inside the water pump. The impeller may spin on the water pump shaft or the impeller may corrode. Either condition reduces coolant circulation resulting in engine overheating.

 

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Turn Off Air Suspension System Before Jacking/Lifting Vehicle

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Prior to jacking or lifting a vehicle with air suspension, you must turn off the suspension switch. The switch is generally located in the trunk or on the right side of the passenger foot well.

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Rough Idle and/or Engine Stalling Condition

Verified for the Lincoln Navigator

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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Exhaust Leak in Fornt of Catalytic Converter

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An exhaust leak may develop in front of the catalytic converter. This type of leak should be corrected as soon a possible to avoid damaging the catalytic converter.

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Replace Spark Plug Boots When Replacing Spark Plugs

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Due to age and possible damage during removal, it is recommended to replace  the spark plug boots when replacing the spark plugs,

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Ensure battery height is correct when replacing battery

Verified for the Lincoln Navigator
When replacing the battery, make sure the battery height is correct; a battery that is too tall can cause a short circuit when the hood is closed.
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Oil coated air filer causing mass air flow sensor failure

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Do not use air filters with oil-coated elements. They may cause premature failure of the mass air flow sensor; this is not covered under the warranty.

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Service power steering fluid regularly

Verified for the Lincoln Navigator

Even though the manufacturer does not call for regular servicing, our technicians recommend servicing the power steering fluid regularly.

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Adjust AC Clutch Air Gap For Proper Compressor Operation

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Checking and adjusting the AC compressor clutch air gap can extend the service life of the AC compressor.

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Spark Plugs May be Difficult to Remove

Verified for the Lincoln Navigator

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.

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