Maintenance and Specifications 305Engine compartment 307
Engine oil 308
Battery 311
Fuel information 319
Air filter(s) 332
Part numbers 348
Refill capacities 349
Lubricant specifications 351
Accessories 359
Index 361
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2004 Navigator (nav)
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USA English (fus) Table of Contents
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Vehicle Symbol Glossary
Power Windows
Front/Rear Power Window Lockout
Child Safety Door
Lock/Unlock Interior Luggage
Compartment Release
Symbol
Panic Alarm Engine Oil
Engine Coolant Engine Coolant
Temperature
Do Not Open When Hot Battery
Avoid Smoking, Flames,
or Sparks Battery Acid
Explosive Gas Fan Warning
Power Steering Fluid Maintain Correct Fluid
Level MAX
MIN
Emission System Engine Air Filter
Passenger Compartment
Air Filter Jack
Check fuel cap Low tire warning
2004 Navigator (nav)
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USA English (fus) Introduction
9
IDENTIFYING COMPONENTS IN THE ENGINE COMPARTMENT
5.4L 4V V8 engine
1. Battery
2. Automatic transmission fluid dipstick
3. Engine oil filler cap
4. Power steering fluid reservoir
5. Engine oil dipstick
6. Brake fluid reservoir
7. Engine coolant reservoir
8. Air filter assembly
9. Windshield washer fluid reservoir
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Adding engine oil
1. Check the engine oil. For instructions, refer to Checking the engine
oil in 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
MAX mark on the engine oil level indicator (dipstick).
4. Install the indicator 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 indicator and/or the engine oil filler cap removed.
Engine oil and filter recommendations
Look for this certification
trademark.
Use SAE 5W-20 engine oil.
Only use oils “ Certified For Gasoline Engines ” by the American
Petroleum Institute (API). To protect your engine ’ s warranty use
Motorcraft SAE 5W-20 or an equivalent 5W-20 oil meeting Ford
specification WSS-M2C153 – H. SAE 5W-20 oil provides optimum fuel
economy and durability performance meeting all requirements for
your vehicle ’ s engine .
Do not use supplemental engine oil additives, cleaners or other engine
treatments. They are unnecessary and could lead to engine damage that
is not covered by Ford warranty.
Change your engine oil according to the appropriate schedule listed in
the scheduled maintenance guide.
Ford production and aftermarket (Motorcraft) oil filters are designed for
added engine protection and long life. If a replacement oil filter is used
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that does not meet Ford material and design specifications, start-up
engine noises or knock may be experienced.
It is recommended you use the appropriate Motorcraft oil filter (or
another brand meeting Ford specifications) for your engine application.
BATTERY
Your vehicle is equipped with a
Motorcraft maintenance-free battery
which normally does not require
additional water during its life of
service.
However, for severe usage or in high temperature climates, check the
battery electrolyte level. Refer to the scheduled maintenance guide for
the service interval schedules.
Keep the electrolyte level in each cell up to the “ level indicator ” .
Do not overfill the battery cells.
If the electrolyte level in the battery is low, you can add plain tap water
to the battery, as long as you do not use hard water (water with a high
mineral or alkali content). If possible, however, try to only fill the battery
cells with distilled water. If the battery needs water often, have the
charging system checked.
If your battery has a cover/shield, make sure it is reinstalled
after the battery has been cleaned or replaced.
For longer, trouble-free operation, keep the top of the battery clean and
dry. Also, make certain the battery cables are always tightly fastened to
the battery terminals.
If you see any corrosion on the battery or terminals, remove the cables
from the terminals and clean with a wire brush. You can neutralize the
acid with a solution of baking soda and water.
When the battery is disconnected or a new battery installed, the
transmission must learn its adaptive strategy. As a result of this, the
transmission may shift firmly. This operation is considered normal and
will fully update transmission operation to its optimum shift feel.
2004 Navigator (nav)
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SNOW TIRES AND CHAINS
Snow tires must be the same size and grade as the tires you
currently have on your vehicle.
The tires on your vehicle have all weather treads to provide traction in
rain and snow. However, in some climates, you may need to use snow
tires and chains.
Follow these guidelines when using snow tires and chains:
• Use only cable type chains or chains offered by Ford as an accessory
or equivalent. Other conventional link type chains may contact and
cause damage to the vehicle ’ s wheel house and/or body.
• Do not install chains on the front wheels. Chains on the front wheels
may interfere with suspension components.
• Chains are not recommended for use on the optional P275/65R18 tire.
• Install chains securely, verifying that the chains do not touch any
wiring, brake lines or fuel lines.
• Drive cautiously. If you hear the chains rub or bang against your
vehicle, stop and re-tighten the chains. If this does not work, remove
the chains to prevent damage to your vehicle.
• If possible, avoid fully loading your vehicle.
• Remove the tire chains when they are no longer needed. Do not use
tire chains on dry roads.
• The suspension insulation and bumpers will help prevent vehicle
damage. Do not remove these components from your vehicle when
using snow tires and chains.
• Do not exceed 48 km/h (30 mph) with tire chains on your vehicle.
MOTORCRAFT PART NUMBERS
Component 5.4L 4V V8 engine
Air filter element FA-1634
Battery (standard) BXT-65-650/BXT-65 – 750
Fuel filter FG-986B
Oil filter FL-820-S
PCV valve EV-248
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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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change oil soon warning,
message center .......................308
checking and adding ..............308
dipstick ....................................308
filter, specifications ........310, 348
recommendations ...................310
refill capacities ........................349
specifications ..................351, 354
Exhaust fumes ..........................220
Extended Rear Park Assist ......238
F
Fail safe cooling ........................317
Floor mats .................................149
Fluid capacities .........................349
Foglamps .....................................99
Four-Wheel Drive vehicles .......240
control trac .............................240
description ..............................241
driving off road .......................243
electronic shift ........................242
indicator light .........................240
preparing to drive your
vehicle .....................................227
Fuel ............................................319
calculating fuel
economy ..........................139, 323
cap ...........................................321
capacity ...................................349
choosing the right fuel ...........321
comparisons with EPA fuel
economy estimates .................326
detergent in fuel .....................322
filling your vehicle with
fuel ...........................319, 321, 323
filter, specifications ........323, 348
fuel pump shut-off switch .....263
improving fuel economy ........323
octane rating ...................322, 354 quality ......................................322
running out of fuel .................322
safety information relating to
automotive fuels .....................319
Fuses ..................................265 – 266
G
Garage Door Opener (see
Homelink wireless control
system) ......................................132
Gas cap (see Fuel cap) ............321
Gas mileage (see Fuel
economy) ...................................323
Gauges .........................................14
GAWR (Gross Axle Weight
Rating) .......................................252
calculating ...............................254
definition .................................252
driving with a heavy load ......252
location ....................................252
GVWR (Gross Vehicle Weight
Rating) .......................................252
calculating .......................252, 254
definition .................................252
driving with a heavy load ......252
location ....................................252
H
Hazard flashers .........................263
Headlamps ...................................99
aiming ......................................101
autolamp system .......................99
bulb specifications ..................103
daytime running lights ...........100
flash to pass ............................100
high beam ...............................100
replacing bulbs .......................105
turning on and off ....................99
2004 Navigator (nav)
Owners Guide (post-2002-fmt)
USA English (fus) Index
363