Page 300 of 370
4. To attach the new wiper to the
wiper arm, align the cross pin and
keyway (denoted with the arrows)
and firmly press the wiper blade
into the wiper arm until an audible
snap is heard.
If you find this procedure too difficult, please see your dealer.
ENGINE OIL
Checking the engine oil
Refer to thescheduled maintenance informationfor the appropriate
intervals for checking the engine oil.
1. Make sure the vehicle is on level ground.
2. Turn the engine off and wait 15 minutes for the oil to drain into the
oil pan.
3. Set the parking brake and ensure the gearshift is securely latched in P
(Park).
4. Open the hood. Protect yourself from engine heat.
5. Locate and carefully remove the
engine oil level dipstick.
6. Wipe the dipstick clean. Insert the dipstick fully, then remove it again.
•If the oil level iswithin this
range,the oil level is acceptable.
DO NOT ADD OIL.
Maintenance and Specifications
300
2011 Navigator(nav)
Owners Guide, 1st Printing
USA(fus)
Page 301 of 370

•If the oil level isbelow this
mark,engineoil must be added
to raise the level within the
normal operating range.
•If required, add engine oil to the engine. Refer toAdding engine oil
in this chapter.
•Do not overfill the engine
with oil. Oil levels above this
mark may cause engine
damage.If the engine is
overfilled, some oil must be
removed from the engine by an
authorized dealer.
7. Put the dipstick back in and ensure it is fully seated.
Adding engine oil
1. Check the engine oil. For instructions, refer toChecking the engine
oilin this chapter.
2. If the engine oil level is not within the normal range, add only certified
engine oil of the recommended viscosity. Remove the engine oil filler cap
and use a funnel to pour the engine oil into the opening.
3. Recheck the engine oil level. Make sure the oil level is not above the
upper hole or the MAX mark on the engine oil level dipstick.
4. Install the dipstick and ensure it is fully seated.
5. Fully install the engine oil filler cap by turning the filler cap clockwise
1/4 of a turn until the cap is fully seated.
To avoid possible oil loss, DO NOT operate the vehicle with the
engine oil level dipstick and/or the engine oil filler cap removed.
Maintenance and Specifications
301
2011 Navigator(nav)
Owners Guide, 1st Printing
USA(fus)
Page 305 of 370

If the battery has been disconnected or a new battery has been installed,
the clock and radio settings must be reset once the battery is
reconnected.
•Always dispose of automotive
batteries in a responsible manner.
Follow your local authorized
standards for disposal. Call your
local authorized recycling center
to find out more about recycling
automotive batteries.
ENGINE COOLANT
Checking engine coolant
The concentration and level of engine coolant should be checked at the
intervals listed inscheduled maintenance information.The coolant
concentration should be maintained at 50/50 coolant and distilled water,
which equates to a freeze point of -34°F (-36°C). Coolant concentration
testing is possible with a hydrometer or antifreeze tester. The level of
coolant should be maintained at the FULL COLD level or within the
COLD FILL RANGE in the coolant reservoir. If the level falls below, add
coolant per the instructions in theAdding engine coolantsection.
Your vehicle was factory-filled with a 50/50 engine coolant and water
concentration. If the concentration of coolant falls below 40% or above
60%, the engine parts could become damaged or not work properly.A
50/50 mixture of coolant and water provides the following:
•Freeze protection down to -34°F (-36°C).
•Boiling protection up to 265°F (129°C).
•Protection against rust and other forms of corrosion.
•Proper function of calibrated gauges.
L
E
A
D
RETURN
RECYCLE
Maintenance and Specifications
305
2011 Navigator(nav)
Owners Guide, 1st Printing
USA(fus)
Page 365 of 370

LATCH .....................................170
recommendations ...................164
Child safety seats - booster
seats ...........................................177
Cleaning your vehicle
engine compartment ..............289
instrument panel ....................290
interior .............................291–292
plastic parts ............................289
washing ....................................287
waxing .....................................288
wheels ......................................288
wiper blades ............................290
Clock ............................................71
Compass, electronic
set zone adjustment .................25
Console ........................................70
overhead ..............................69–70
Controls
power seat ...............................123
steering column ........................82
Coolant
checking and adding ..............305
refill capacities ................308, 331
specifications ..........................331
Cruise control
(see Speed control) ....................80
Customer Assistance ................253
Ford Extended Service
Plan ..................................340, 343
Getting assistance outside
the U.S. and Canada ..............283
Getting roadside assistance ...253
Getting the service you
need .........................................279
Ordering additional owner’s
literature .................................285Utilizing the
Mediation/Arbitration
Program ...................................283
D
Daytime running lamps
(see Lamps) ................................56
Dipstick
automatic transmission
fluid ..........................................325
engine oil .................................300
Driving under special
conditions ..................237, 247, 250
sand .........................................249
snow and ice ...........................251
through water .................249, 252
E
Electronic message center .........20
Emergencies, roadside
jump-starting ..........................274
running out of fuel .........273, 316
Emission control system ..........321
Engine ................................334–335
cleaning ...................................289
coolant .....................................305
fail-safe cooling .......................309
idle speed control ...................303
lubrication specifications .......331
refill capacities ........................331
service points ..........................297
starting after a collision .........255
Engine block heater .................221
Engine oil ..................................300
checking and adding ..............300
dipstick ....................................300
filter, specifications ........302, 330
recommendations ...................302
Index
365
2011 Navigator(nav)
Owners Guide, 1st Printing
USA(fus)