Page 348 of 368

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, theCheck engine/Service engine soonlight 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 theCheck engine/Service engine soonlight 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 yourCheck engine/Service engine
soonlight is on, refer to the description in theWarning lights and
chimessection of theInstrument Clusterchapter. Your vehicle may not
pass the I/M test with theCheck engine/Service engine soonlight 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 MERCONAT F.
REVIEW COPY
2005 Aviator f/k/a Navigator LS(231), Owners Guide (post-2002-fmt)(own2002),
Market:USA_English(fus)
Maintenance and Specifications
348
Page 350 of 368

TRANSMISSION FLUID
Checking automatic transmission fluid
The automatic transmission does not have a transmission fluid dipstick.
Refer to yourScheduled Maintenance Guidefor scheduled intervals for
fluid checks and changes. Your transmission does not consume fluid.
However, the fluid level should be checked if the transmission is not
working properly, (i.e., if the transmission slips or shifts slowly) or if you
notice some sign of fluid leakage.
Transmission fluid should be checked and, if required, fluid
should be added by a qualified technician.
Do not use supplemental transmission fluid additives, treatments or
cleaning agents. The use of these materials may affect transmission
operation and result in damage to internal transmission components.
AIR FILTER MAINTENANCE
Refer to the scheduled maintenance guide for the appropriate intervals
for changing the air filter element.
When changing the air filter element, use only the Motorcraft air filter
element listed. Refer toMotorcraft part numbersin this chapter.
Note:Do not start your engine with the air cleaner removed and do not
remove it while the engine is running.
CHANGING THE AIR FILTER ELEMENT
1. Release the clamps that secure the air filter housing cover.
2. Carefully separate the two halves of the air filter housing.
3. Remove the air filter element from the air filter housing.
4. Wipe the air filter housing and cover clean to remove any dirt or
debris and to ensure good sealing.
5. Install a new air filter element. Be careful not to crimp the filter
element edges between the air filter housing and cover. This could cause
filter damage and allow unfiltered air to enter the engine if not properly
seated.
6. Replace the air filter housing cover and secure the clamps.
Note:Failure to use the correct air filter element may result in severe
engine damage. The customer warranty may be voided for any damage to
the engine if the correct air filter element is not used.
REVIEW COPY
2005 Aviator f/k/a Navigator LS(231), Owners Guide (post-2002-fmt)(own2002),
Market:USA_English(fus)
Maintenance and Specifications
350
Page 351 of 368

MOTORCRAFT PART NUMBERS
Component 4.6L DOHC V8 engine
Engine air filter element FA-1695
Fuel filter FG-1068
Battery BXT-65-650
Oil filter FL-820-S
PCV valve
1
Spark plugs2
1
The PCV valve is a critical emission component. It is one of the items
listed in theScheduled Maintenance Guideand is essential to the life
and performance of your vehicle and to its emissions system.
For PCV valve replacement, see your dealer or a qualified service
technician. Refer to theScheduled Maintenance Guidefor the
appropriate intervals for changing the PCV valve.
Replace the PCV valve with one that meets Ford material and
design specifications for your vehicle, such as a Motorcraft or
equivalent replacement part. The customer warranty may be void
for any damage to the emissions system if such a PCV valve is not
used.
2For spark plug replacement, see your dealer or a qualified service
technician. Refer to theScheduled Maintenance Guidefor the
appropriate intervals for changing the spark plugs.
Replace the spark plugs with ones that meet Ford material and
design specifications for your vehicle, such as Motorcraft or
equivalent replacement parts. The customer warranty may be
void for any damage to the engine if such spark plugs are not
used.
REVIEW COPY
2005 Aviator f/k/a Navigator LS(231), Owners Guide (post-2002-fmt)(own2002),
Market:USA_English(fus)
Maintenance and Specifications
351
Page 353 of 368

Fluid Ford Part
NameApplication Capacity
Front axle
lubricantMotorcraft SAE
80W-90
Premium Rear
Axle Lubricant4x4/AWD
vehicles1.4 quarts
(1.3L)
Rear axle
lubricantMotorcraft SAE
75W-140
Synthetic Rear
Axle LubricantConventional
Axle3.5 pints (1.7L)
Windshield
washer fluidMotorcraft
Premium
Windshield
Washer
ConcentrateAll 4.2 quarts
(4.0L)
1Ensure the correct automatic transmission fluid is used. MERCONand
MERCONV are not interchangeable. DO NOT mix MERCONand
MERCONV. Refer to yourScheduled Maintenance Guideto
determine the correct service interval.
2Indicates only approximate dry-fill capacity. Some applications may vary
based on cooler size and if equipped with an in-tank cooler. The amount
of transmission fluid and fluid level should be checked by a qualified
technician.
3Add the coolant type originally equipped in your vehicle.
4Use of synthetic or synthetic blend motor oil is not mandatory. Engine
oil need only meet the requirements of Ford specification
WSS-M2C930-A and the API Certification mark.
REVIEW COPY
2005 Aviator f/k/a Navigator LS(231), Owners Guide (post-2002-fmt)(own2002),
Market:USA_English(fus)
Maintenance and Specifications
353
Page 355 of 368

ItemFord Part
Name or
equivalentFord Part
NumberFord
Specification
Automatic
transmission
1
Motorcraft
MERCONV
AT FXT-5-QM MERCONV
Power steering
fluidMotorcraft
MERCON
Multi-Purpose
AT FXT-2-QDX MERCON
Rear axles75W-140 High
performance
synthetic rear
axle lubricantXY-75W140–QL WSL-M2C192–A
Front axle
(AWD)Motorcraft SAE
80W-90
Premium Rear
Axle LubricantXY-80W90-QL WSP-M2C197-A
Transfer case
(AWD)Motorcraft
MERCON
Multi-Purpose
AT FXT-2-QDX MERCON
Transfer case
Front Output
Slip ShaftMotorcraft
Premium
Long-Life
GreaseXG-1-C or XG-1-K ESA-M1C75-B
Windshield
washer fluidMotorcraft
Premium
Windshield
Washer
ConcentrateZC—32–A WSB-M8B16–A2
1Ensure the correct automatic transmission fluid is used. MERCONand
MERCONV are not interchangeable. DO NOT mix MERCONand
MERCONV. Refer to yourScheduled Maintenance Guideto
determine the correct service interval.
REVIEW COPY
2005 Aviator f/k/a Navigator LS(231), Owners Guide (post-2002-fmt)(own2002),
Market:USA_English(fus)
Maintenance and Specifications
355
Page:
< prev 1-8 9-16 17-24