2008 FORD SUPER DUTY Diesel Supplement Manual

F-Super Duty vehicles (6.4L engine):
•An engine block heater must be used at temperatures below
–10°F (–23°C).
•Use the same engine oil and filter change intervals when using
synthetic engine oil.
•Heavier 15W–40 and 5W–40 engine oils are recommended for
temperature over 50°F (10°C) and must be used for heavy duty
driving and trailer towing.
A symbol has been developed by the
American Petroleum Institute (API)
to help you select the proper engine
oil. It will be included on the oil
container you purchase. The top
section of the symbol shows the oil
performance by the API designation.
This should match the owner guide recommendation. The center section
will show the SAE viscosity grade
Changing engine oil and filter
Change your oil and filter according to thescheduled maintenance
informationin this supplement. Change more frequently if your vehicle
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operation includes extended periods of idling or low-speed operation,
driving for a long time in cold temperatures or driving short distances.
See the following sectionEngine lubrication for severe service
operationfor all severe duty restrictions.
Refer toMotorcraft Part Numberslater in this chapter for the engine oil
filter part number. This filter protects your engine by filtering harmful,
abrasive or sludge particles and particles significantly smaller than most
available “will-fit” filters.
To replace the filter,
1. Unscrew the oil filter cap and wait a few seconds for the oil to drain
through the built-in drain valve.Note:The filter should be changed
before reinstalling the oil pan drain plug.
2. Reinstall and tighten the oil filter cap.
Do not handle a hot oil filter with bare hands.
Continuous contact with USED motor oil has caused cancer in
laboratory mice. Protect your skin by washing with soap and
water.
Engine lubrication for severe service operation
The following severe service operating conditions require unique engine
maintenance procedures:
•frequent or extended idling (over 10 minutes per hour of normal
driving).
•if vehicle is operated in sustained ambient temperatures below -10°F
(-23°C) or above 100°F (38°C)
•frequent low speed operation, consistent heavy traffic less than 25
mph (40 km/h)
•operating in severe dust conditions.
•towing a trailer over 1,000 miles (1,600 km)
•sustained, high speed driving at Gross Vehicle Weight Rating
(maximum loaded weight for vehicle operation)
If you are operating your vehicle under any of these conditions, change
engine oil and filter every 5,000 miles (8,000 km).
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AIR FILTER RESTRICTION GAUGE AND AIR FILTER
REPLACEMENT
Air filter restriction gauge:
The restriction gauge, located on
the upper housing of the air filter
assembly, measures the vacuum
inside the air filter. The more the air
filter is restricted (dirty, clogged),
the higher the vacuum reading
Check the air filter restriction gauge
whenever the hood is raised to
perform general engine maintenance
at least every 7,500 miles (12,000 km). If the vehicle is operated in
extremely dusty conditions, check the gauge at least every 500 miles
(800 km), or two weeks, whichever comes first.
Change the air filter when the gauge reads 25 inches (635 mm). Engine
performance and fuel economy are adversely affected when the
maximum restriction is reached.
Blowing-out the air filter element with compressed air is not
recommended as the compressed air may damage the filter paper.
Note:It is not possible to determine the level of filter clogging by visual
appearance alone. A filter which appears to be dirty may actually have
several thousand miles (kilometers) of life remaining.
Always use the underhood air filter restriction gauge to
determine when the air filter element needs to be changed. The
warning light on the instrument cluster should not be used
exclusively for determining when the air filter element needs
changing.
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After installation of the new filter
element, reset the gauge by pressing
the reset button on top of the
gauge.
Note:If the vehicle is operated in a
heavy snow storm, in blowing snow
or the vehicle is equipped with a
snowplow, the engine air filter
element may become partially
clogged with snow and/or ice. If this
occurs, the engine may experience a
significant reduction in power output. The vehicle may be driven under
these conditions for up to 200 miles (320 km) without damage to the
engine or related components.
At the earliest opportunity, clear all snow and ice from the air induction
system and reset the restriction gauge by pressing the button on the end
of the gauge. If the air filter restriction gauge vacuum reads above the
second line after clearing snow and/or ice, then replace the filter. Reset
filter restriction gauge after changing the air filter element.
The air filter warning message on the instrument cluster may be used, in
addition to the underhood restriction gauge, to monitor the condition of
the air filter element. Refer to theEngine air filterwarning light in this
chapter of the supplement.
Air filter replacement:
When replacing the air filter element, use the Motorcraft air filter
element listed inMotorcraft Part Numberslater in this chapter.
To reduce the risk of vehicle damage and/or personal burn
injuries do not start your engine with the air filter removed and
do not remove it while the engine is running.
Failure to use the correct air filter element may result in severe
engine damage.
•E-series air filter element:
1. Disconnect the hoses from the air filter outlet tube.
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2. Loosen the clamp and disconnect
the air filter outlet tube.
3. Disconnect the mass air flow
(MAF) sensor electrical connector.
(Slide out the red lock, press tab
and remove the electrical
connector.)
4. Disconnect the three latches and
remove the air filter cover
5. Remove the air filter.
6. To install, reverse the removal procedure.
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•F-Super Duty air filter:
1. Release and flip the toggle clamps
back.
2. Back the auxiliary tube away from
the housing (or pull it off, if
necessary), remove the top of the
air filter housing, then push the top
half of the filter toward the engine;
this will pop the bottom half free of
the ridge at the bottom of the air
filter box.
3. Pull up on the filter element to remove it.
4. When installing the new filter, make sure the bottom half engages the
ridge at the bottom of the air filter box first, then push the top half
down and back. If not installed properly, the top of the air filter assembly
will not close. Push the auxiliary tube back on (or re-install it, if
removed).
When servicing the air filter, always be sure that the auxiliary
hose is not kinked or obstructed and that it is placed back into
the hole in the front cowl near the back of the headlamp. Check
all hose and wiring positions. Failure to do so may result in
severe engine damage when driving through deep water and/or
encountering unusually heavy precipitation conditions.
DIESEL EXHAUST SYSTEM: OXIDATION CATALYST/DIESEL
PARTICULATE FILTER SYSTEM (F-SUPER DUTY ONLY)
Your vehicle is equipped with a diesel particulate filter (DPF), which is
coupled to a diesel oxidation catalyst, that reduces the amount of
harmful exhaust emitted from the tailpipe. As soot gathers in the system
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it begins to restrict the filter. The soot gathered inside the filter needs to
be periodically cleaned. The soot can be cleaned in two different ways;
passive regeneration and active regeneration. Both methods occur
automatically and require no actions from the driver/operator. During
either one of these regeneration methods you may notice an
increase/change in exhaust noise/tone.
Passive regeneration
In passive regeneration, the exhaust constituents / temperature are at an
appropriate level where some soot can be reduced or oxidized (burned)
thus cleaning the filter. This method occurs naturally as a result of
normal engine operating conditions (at varying levels due to drive
patterns).
Active regeneration
If there is not enough passive regeneration naturally occurring due to
vehicle drive patterns, the engine control system will initiate an active
regeneration. In an active regeneration, the filter is cleaned by raising
the exhaust temperature to a point where the soot is burned away. This
is accomplished through various engine actions which raise the exhaust
temperature in the oxidation catalyst/DPF system to an appropriate high
level where the soot is burned off. After the soot is burned off, the
exhaust temperature and back-pressure (restriction) fall back to normal
levels.
Filter service/maintenance
Over time a slight amount of ash will build up in the DPF which is not
removed during the regeneration process. The DPF may need to be
removed for ash cleaning at approximately 120,000 miles (193,000 km)
or greater (actual mileage can vary greatly depending upon
engine/vehicle operating conditions) and replaced with a new or
remanufactured (ash cleaned) part. The filter may need to be replaced
at approximately 250,000 miles (400,000 km) depending upon
engine/vehicle operating conditions. In both cases the engine control
system will set a service light (
) to inform you to bring the vehicle
to the dealer for service.
If there are any issues with the oxidation catalyst/DPF system a service
light (
or) will be set by the engine control system to inform
you to bring the vehicle into a dealership for service.
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Resonator/Tailpipe assembly maintenance
The diesel resonator tail-pipe assembly is a uniquely functioning device
that accompanies the Oxidation Catalyst/DPF assembly. The assembly
serves multiple functions. First it serves as an acoustic device to
attenuate exhaust noise. Second it provides an exit path for the exhaust
from the vehicle. It also is designed to help control the temperature of
the exhaust during DPF regeneration events. The visible holes in each
leg of the twin tip and the holes under the shield just inboard of the
right rear tire(s) are functional. The holes need to be kept clear of
mud/debris or foreign material to maintain proper function of the
exhaust system. Clean and remove debris or foreign material if present
as needed. Spraying with a hose during regular washing of vehicle should
help keep holes clean/clear of debris or foreign material.
Note:Additions of aftermarket devices or modifications to the exhaust
system can reduce the effectiveness of the exhaust system as well as
cause damage to the exhaust system and/or engine. These actions may
also affect the vehicle’s warranty. See the vehicle’s warranty guide for
more information.
Failure to maintain the functional holes, in the tailpipe section of
the exhaust, clean and free of debris or foreign material may
result in the holes becoming blocked or plugged. Do not modify or
remove the tail-pipe section. Blocked or plugged holes or
removal/modification of the system could result in elevated exhaust gas
temperatures which may result in vehicle/property damage or personal
injury.
The normal operating temperature of the exhaust system is very
high. Never work around or attempt to repair any part of the
exhaust system until it has cooled. Use special care when working
around the diesel oxidation catalytic converter and/or the diesel
particulate filter (DPF). The diesel oxidation catalytic converter and/or
the DPF heats up to a high temperature after only a short period of
engine operation and can stay hot even after the engine is turned off.
Failure to follow these instructions may result in personal injury.
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