
How fail-safe cooling works
If the engine begins to overheat:
• The engine coolant temperature
gauge will move to the red (hot)
area.
• The and the symbol
will illuminate.
• The “ Service Engine Soon ”
indicator light will illuminate.
If the engine reaches a preset over-temperature condition, the engine
will automatically switch to alternating cylinder operation. Each disabled
cylinder acts as an air pump and cools the engine.
When this occurs the vehicle will still operate. However:
• The engine power will be limited.
• The air conditioning system will be disabled.
Continued operation will increase the engine temperature:
• The engine will completely shut down.
• Steering and braking effort will increase.
Once the engine temperature cools, the engine can be re-started. Take
your vehicle to a service facility as soon as possible to minimize engine
damage.
When fail-safe mode is activated
You have limited engine power when in the fail-safe mode, so drive the
vehicle with caution. The vehicle will not be able to maintain high speed
operation and the engine will run rough. Remember that the engine is
capable of completely shutting down automatically to prevent engine
damage, therefore:
1. Pull off the road as soon as safely possible and turn off the engine.
2. Arrange for the vehicle to be taken to a service facility.
3. If this is not possible, wait a short period for the engine to cool.
4. Check the coolant level and replenish if low.
Never remove the coolant reservoir cap while the engine is
running or hot.
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detected a malfunction. Temporary malfunctions may cause your Check
Engine/Service Engine Soon light to illuminate. Examples are:
1. The vehicle has run out of fuel. (The engine may misfire or run
poorly.)
2. Poor fuel quality or water in the fuel.
3. The fuel cap may not have been securely tightened.
These temporary malfunctions can be corrected by filling the fuel tank
with good quality fuel and/or properly tightening the fuel cap. After three
driving cycles without these or any other temporary malfunctions
present, the Check Engine/Service Engine Soon light should turn off.
(A driving cycle consists of a cold engine startup followed by mixed
city/highway driving.) No additional vehicle service is required.
If the Check Engine/Service Engine Soon light remains on, have your
vehicle serviced at the first available opportunity.
Readiness for Inspection/Maintenance (I/M) testing
In some localities, it may be a legal requirement to pass an I/M test of
the on-board diagnostics system. If your “ Check Engine/Service Engine
Soon ” light is on, refer to the description in the Warning lights and
chimes section of the Instrument cluster chapter. Your vehicle may not
pass the I/M test with the “ Check Engine/Service Engine Soon ” light on.
If the vehicle ’ s powertrain system or its battery has just been serviced,
the on-board diagnostics system is reset to a “ not ready for I/M test ”
condition. To ready the on-board diagnostics system for I/M testing, a
minimum of 30 minutes of city and highway driving is necessary as
described below:
• First, at least 10 minutes of driving on an expressway or highway.
• Next, at least 20 minutes driving in stop-and-go, city-type traffic with
at least four idle periods.
Allow the vehicle to sit for at least eight hours without starting the
engine. Then, start the engine and complete the above driving cycle. The
engine must warm up to its normal operating temperature. Once started,
do not turn off the engine until the above driving cycle is complete.
CHECKING AND ADDING POWER STEERING FLUID
Check the power steering fluid. Refer to the scheduled maintenance
guide for the service interval schedules. If adding fluid is necessary, use
only Ford Premium Power Steering Fluid or MERCON AT F.
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Component 5.4L 4V V8 engine
Spark plugs* AGSF-32PM
* Refer to Vehicle Emissions Control Information (VECI) decal for spark
plug gap information.
REFILL CAPACITIES
Fluid Ford Part
Name Application Capacity
Brake fluid Motorcraft High
Performance
DOT 3 Motor
Vehicle Brake
Fluid All Fill to line on
reservoir
Engine oil
(includes filter
change) 6
Motorcraft SAE
5W-20 Premium
Synthetic Blend
Motor Oil (US)
Motorcraft SAE
5W-20 Super
Premium Motor
Oil (Canada) All 6.6L (7.0
quarts)
Fuel tank N/A All 106 L (28
gallons)
Power steering
fluid Motorcraft
MERCON AT F All Fill to line on
reservoir
Transmission
fluid 1
Motorcraft
MERCON AT F 4 x 2 vehicles 15.0L (15.9
quarts) 2
4 x 4 vehicles 15.5L (16.4
quarts) 2
Transfer case
fluid Motorcraft
MERCON AT F 4 x 4 vehicles 1.9L (2.0
quarts)
Engine coolant 3
Motorcraft
Premium Gold
Engine Coolant
(yellow-colored) without aux rear
heat 21.0L (22.2
quarts)
with aux rear
heat 23.0L (24.3
quarts)
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Item Ford part
name Ford part
number Ford
specification
Brake fluid Motorcraft High
Performance
DOT 3 Motor
Vehicle Brake
Fluid PM-1 ESA-M6C25-A
and DOT 3
Driveshaft, slip
spline, double
Cardan joint
center ball Premium Long
Life Grease XG-1-C or
XG-1-K ESA-M1C75 – B
Engine coolant Motorcraft
Premium Gold
Engine Coolant
(yellow-colored) VC-7 – A WSS-M97B51-A1
Engine oil Motorcraft SAE
5W-20 Premium
Synthetic Blend
Motor Oil
Motorcraft SAE
5W-20 Super
Premium Motor
Oil (Canada) XO-5W20-QSP
(US)
CXO-5W20 – LSP12
(Canada) WSS-M2C153-H
and API
Certification Mark
4x4 front wheel
bearings, 4x4
spindle needle
bearings, spindle
thrust bearings
& front drive
axle u-joint/slip
spline High
Temperature
4x4 Front Axle
& Wheel Bearing
Grease E8TZ-19590-A ESA-M1C198-A
Automatic
transmission 1
Motorcraft
MERCON AT F XT-2-QDX MERCON
Power steering
fluid Motorcraft
MERCON AT F XT-2-QDX MERCON
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safety belts ..............................302
washing ....................................299
waxing .....................................299
wheels ......................................300
wiper blades ............................301
Clock ..........................................117
Compass, electronic
set zone adjustment ...............138
Console ......................................148
overhead ..........................114 – 116
rear ..........................................149
Controls
power seat ...............................170
steering column ......................129
Coolant
checking and adding ..............313
refill capacities ................317, 349
specifications ..................351, 354
Cruise control
(see Speed control) ..................126
Customer Assistance ................262
Ford accessories for your
vehicle .....................................304
Ford Extended Service
Plan ..........................................292
Getting assistance outside the
U.S. and Canada .....................296
Getting roadside assistance ...262
Getting the service you
need .........................................290
Ordering additional owner ’ s
literature .................................297
The Dispute Settlement
Board .......................................292
Utilizing the
Mediation/Arbitration
Program ...................................295 D
Daytime running lamps
(see Lamps) ..............................100
Defrost
rear window ..............................98
Dipstick
automatic transmission
fluid ..........................................330
engine oil .................................308
Doors
lubricant specifications ..........351
Driveline universal joint and
slip yoke ....................................332
Driving under special
conditions ..................238, 245, 248
sand .........................................247
snow and ice ...........................249
through water .................247, 251
E
Electronic message center .......136
Emergencies, roadside
jump-starting ..........................282
Emission control system ..........326
Engine ........................................354
cleaning ...................................300
coolant .....................................313
fail-safe coolant ......................317
idle speed control ...................311
lubrication
specifications ..................351, 354
refill capacities ........................349
service points ..........................307
starting after a collision .........263
Engine block heater .................220
Engine oil ..................................308
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side view mirrors (power) .....124
Motorcraft parts ................323, 348
N
Navigation system .......................43
cd functions ..............................59
destination mode ......................71
DVD location .............................92
map mode .................................62
quick start .................................45
radio functions ..........................51
O
Octane rating ............................322
Oil (see Engine oil) ..................308
P
Panic alarm feature, remote
entry system ..............................157
Parking brake ............................223
Parts (see Motorcraft parts) ....348
Pedals (see Power adjustable
foot pedals) ...............................125
Power adjustable foot pedals ...125
Power distribution box
(see Fuses) ...............................266
Power door locks ..............153, 162
Power liftgate ............................149
Power point ...............................118
Power steering ..........................224
fluid, checking and adding ....328
fluid, refill capacity ................349
fluid, specifications .........351, 354
Power Windows .........................119 Preparing to drive your
vehicle ........................................227
R
Radio ......................................16, 21
Rear window defroster ...............98
Relays ........................................265
Remote entry system .......154, 157
illuminated entry ....................162
locking/unlocking
doors ........................153 – 155, 163
opening the trunk ...........156 – 157
panic alarm .............................157
replacement/additional
transmitters .............................161
Roadside assistance ..................262
Roof rack ...................................152
S
Safety Belt Maintenance ..........194
Safety belts (see Safety
restraints) ..................183, 186 – 190
Safety defects, reporting ..........298
Safety restraints ........183, 186 – 190
belt minder .............................191
extension assembly ................194
for adults .........................187 – 189
for children .............................203
safety belt maintenance .........194
warning light and
chime ...............................190 – 191
Safety seats for children ..........206
Seat belts
(see Safety restraints) .............183
Seats ..........................................169
child safety seats ....................206
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climate control ........................171
memory seat ...................158, 171
SecuriLock passive
anti-theft system ...............166 – 167
Servicing your vehicle ..............305
Snowplowing .................................7
Spare tire (see Changing the
Tire) ...........................................275
Spark plugs,
specifications .....................348, 354
Special notice
utility-type vehicles ....................7
Specification chart,
lubricants ...........................351, 354
Speed control ............................126
Starting your vehicle ........217 – 219
jump starting ..........................282
Steering
speed sensitive .......................224
Steering wheel
controls ....................................129
T
Tire Pressure Monitoring
System (TPMS)
Driving .....................................247
Roadside Emergencies ...........275
Warning Displays ......................14
Tires ...........................275, 333 – 334
changing ..................275 – 276, 281
snow tires and chains ............348
tire grades ...............................334
treadwear ................................333
Tonneau cover ...........................117
Towing .......................................254 recreational towing .................261
trailer towing ..........................254
wrecker ....................................288
Transmission .............................231
brake-shift interlock (BSI) ....231
fluid, checking and adding
(automatic) .............................330
fluid, refill capacities ..............349
lubricant
specifications ..................351, 354
Trunk .................................156 – 157
Turn signal ................................102
V
Vehicle dimensions ...................354
Vehicle Identification Number
(VIN) ..........................................356
Vehicle loading ..........................252
Ventilating your vehicle ...........221
W
Warning lights (see Lights) .......10
Washer fluid ..............................308
Water, Driving through .............251
Windows
power .......................................119
rear wiper/washer ...................113
Windshield washer fluid and
wipers ........................................112
checking and adding fluid .....308
liftgate reservoir .....................308
replacing wiper blades ...........113
Wrecker towing .........................288
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus)Index
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