Fuel Filler Cap
Your fuel tank filler cap has an indexed design with a 1/4 turn on/off
feature.
When fueling your vehicle:
1. Turn the engine off.
2. Carefully turn the filler cap counterclockwise 1/4 of a turn until it
stops.
3. Pull to remove the cap from the fuel filler pipe.
4. To install the cap, align the tabs on the cap with the notches on the
filler pipe.
5. Turn the filler cap clockwise 1/4 of a turn until it clicks at least once.
If the “Check Fuel Cap” indicator comes on and stays on after you start
the engine, the fuel filler cap may not be properly installed. Turn off the
engine, remove the fuel filler cap, align the cap properly and reinstall it.
If you must replace the fuel filler cap, replace it with a fuel filler
cap that is designed for your vehicle. The customer warranty may
be void for any damage to the fuel tank or fuel system if the
correct genuine Ford or Motorcraft fuel filler cap is not used.
The fuel system may be under pressure. If the fuel filler cap is
venting vapor or if you hear a hissing sound, wait until it stops
before completely removing the fuel filler cap. Otherwise, fuel may
spray out and injure you or others.
If you do not use the proper fuel filler cap, excessive pressure or
vacuum in the fuel tank may damage the fuel system or cause
the fuel cap to disengage in a collision, which may result in possible
personal injury.
Fuel Filter
For fuel filter replacement, see your dealer or a qualified service
technician. Refer toscheduled maintenance informationfor the
appropriate intervals for changing the fuel filter.
Replace the fuel filter with an authorized Motorcraft part. The
customer warranty may be void for any damage to the fuel system
if an authorized Motorcraft fuel filter is not used.
2005 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
276
3. The fuel cap may not have been securely tightened. SeeFuel filler
capin this chapter.
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.
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 MERCONAT F.
2005 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
282
BRAKE FLUID
The fluid level will drop slowly as
the brakes wear, and will rise when
the brake components are replaced.
Fluid levels below the “MAX” line
that do not trigger the brake system
warning lamp are within the normal
operating range, there is no need to
add fluid. If the fluid levels are
outside of the normal operating
range, the performance of your
brake system could be
compromised, seek service from your dealer immediately.
TRANSMISSION FLUID
Checking automatic transmission fluid
The automatic transmission does not have a transmission fluid dipstick.
Refer to yourscheduled maintenance informationfor 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
Refer toscheduled maintenance informationfor 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.
2005 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
284
3. Add only enough fluid through
the filler opening so that the fluid
level is at the bottom of the
opening.
Use only fluid that meets Ford specifications. Refer toLubricant
specificationsin this chapter.
DRIVELINE UNIVERSAL JOINT AND SLIP YOKE
Your vehicle may be equipped with universal joints that require
lubrication. Refer to thescheduled maintenance informationfor
maintenance intervals. If the original universal joints are replaced with
universal joints equipped with grease fittings, lubrication will also be
necessary.
MOTORCRAFT PART NUMBERS
Component 4.0L SOHC V6 engine 4.6L 3V V8 engine
Air filter element FA-1695 FA-1695
Fuel filter 2C5E-9155-BB 2C5E-9155-BB
Battery BXT-65-650 BXT-65-650
Oil filter FL-820S FL-820S
PCV valve
1
Spark plugs2
1
The PCV valve is a critical emission component. It is one of the items
listed inscheduled maintenance informationand 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 toscheduled maintenance informationfor 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.
2005 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
286
2For spark plug replacement, see your dealer or a qualified service
technician. Refer toscheduled maintenance informationfor 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.
REFILL CAPACITIES
Fluid Ford Part
NameApplication Capacity
Brake fluid Motorcraft High
Performance
DOT 3 Motor
Vehicle Brake
FluidAll Fill to the MAX
line on reservoir
Engine oil
(including filter
change)
5
Motorcraft SAE
5W-30 Premium
Synthetic Blend
Motor Oil (US)
Motorcraft SAE
5W-30 Super
Premium Motor
Oil (Canada)4.0L 5.0 quarts
(4.7L)
Motorcraft SAE
5W-20 Premium
Synthetic Blend
Motor Oil (US)
Motorcraft SAE
5W-20 Super
Premium Motor
Oil (Canada)4.6L 6.0 quarts
(5.7L)
Fuel tank N/A All 22.5 gallons
(85.2L)
2005 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
287
Fluid Ford Part
NameApplication Capacity
Windshield
washer fluidMotorcraft
Premium
Windshield
Washer
ConcentrateAll vehicles 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 informationto
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.
4Limited Slip differentials must add 4 oz (118 ml ) of additive Friction
Modifier XL-3 or equivalent to the rear axle whenever the axle has been
serviced.
5Use of synthetic or synthetic blend motor oil is not mandatory. Engine
oil need only have the API Certification mark and meet the requirements
of Ford specification WSS-M2C929-A (4.0L) or WSS-M2C930-A (4.6L).
2005 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
289
ItemFord Part Name
or equivalentFord Part
NumberFord
Specification
Automatic
transmission
1Motorcraft
MERCONVATFXT-5-QM MERCONV
Power steering
fluidMotorcraft
MERCON
Multi-Purpose
AT FXT-2-QDX MERCON
Rear axles75W-140 High
Performance
Synthetic Rear
Axle Lubricant
2
XY-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 ShaftPremium
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 informationto
determine the correct service interval.
2Limited-slip differentials must add 4 oz. (118 ml) of Additive Friction
Modifier XL–3 or equivalent to the rear axle whenever the axle has been
serviced.
2005 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
291