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POWER STROKE DIESEL ENGINE
Note:Your vehicle’s powertrain control systems can detect and store
information about vehicle modifications that increase horsepower and
torque output such as whether or not performance-enhancing powertrain
components commonly referred to as “performance chips” have been
used. This information cannot be erased and will stay in the system’s
memory even if the modification is removed. The information can be
retrieved by Ford Motor Company, Ford of Canada, and service and
repair facilities when servicing your vehicle. This information may be
used to determine if repairs will be covered by warranty.
Note:Some aftermarket products may cause severe engine/transmission
and/or exhaust system damage; refer to your warranty information for
more information.
Your new diesel engine will feel, drive and function somewhat differently
than a gasoline engine. Therefore it is very important that you read and
thoroughly familiarize yourself and others operating the vehicle with this
guide. A special procedure for turning off the diesel engine is in the
Starting and Stopping the Enginechapter.It is important to read
and understand this material in order to maintain the best
service life for your engine.
This supplement will acquaint you with the Power Stroke diesel engine.
It provides recommendations on engine care and operating procedures.
For complete vehicle information, also refer to yourOwner’s Manual
included with the vehicle. It also describes equipment and gives
specifications for equipment that was in effect when this guide was
approved for printing, and should be considered a permanent part of the
vehicle.
Ford may discontinue models or change specifications without any notice
and without incurring obligations.
WARNINGS
Throughout this guide, you will find warnings identified by the warning
symbol. Warnings remind you to be especially careful to reduce the risk
of personal injury.
Introduction
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The glow plug system is
electronically controlled by the PCM
and GPCM. The GPCM energizes the
glow plugs immediately after the ignition is turned on and kept on as
determined by the GPCM using the ECT, BARO and environmental
temperature sensor. The required time for the glow plugs to be
energized decreases as the coolant temperature, barometric pressure and
environmental temperature increase.
Engine and secondary cooling system
The cooling system contains an engine cooling loop to cool the engine
and a secondary cooling loop to cool the transmission, exhaust gas
recirculation (EGR), charge air and fuel. The coolant serves three
primary purposes: to provide heat transfer, freeze point protection, and
corrosion protection using additives.
Vehicles with diesel engines typically are used to carry heavy loads and
accumulate mileage rapidly. These two factors may cause the additives in
the coolant to “wear out” in a shorter time. Refer to theSpecial
operating conditionssection for more information about coolant
additives and coolant change intervals. Operating the engine with
insufficient coolant and/or coolant additive can cause severe engine
damage.
Selective catalytic reduction (SCR) system
Your vehicle is equipped with a selective catalytic reduction (SCR)
system to help reduce emission levels of oxides of nitrogen from the
exhaust of the diesel engine. This system relies on the use of diesel
exhaust fluid (DEF) which must be replenished at certain intervals.
Failure to maintain proper DEF levels or if the DEF becomes
contaminated will result in vehicle speed limitations and/or result in the
vehicle entering an idle-only mode. SeeSelective catalytic reduction
(SCR) systemin theFuel and Refuelingchapter for more information.
Speed control (if equipped)
If vehicle speed goes outside a predetermined range from the set speed,
the RES (Resume) function will not reset vehicle speed. Vehicle speed
will need to be reset with the SET +/- button after reaching desired
speed using accelerator pedal.
Introduction
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FUEL FILTER/WATER SEPARATOR
Diesel Fuel Conditioner Module (DFCM)
The vehicle is equipped with a diesel fuel conditioning module (DFCM)
located on the frame-rail under the driver-side floorboard near the
transmission
Water should be drained from the
module assembly whenever the
warning light comes on and the
message center directs you to drain the water separator. This will occur
when approximately 0.32 pints (150 ml) of water accumulates in the
module. If water level is allowed to exceed this level, the water may be
passed through to the engine and may cause fuel injection equipment
damage.
Draining the DFCM
WARNING:The vehicle must be stopped with the engine off
when draining the DFCM. Fuel may ignite if the separator is
drained while the engine is running or vehicle is moving.
Note:Air will enter into the fuel system if the DFCM is drained while
the system is running. The engine will not operate properly if air enters
the system.
Note:With fuel tank levels above
3 4tank it may be necessary to loosen
the bowl 3 turns before opening the drain. This will actuate an
anti-siphon valve at the DFCM inlet and prevent the fuel from siphoning
out of the tank.
Note:A loose drain valve can allow air to enter the fuel system and
cause drivetrain issues. The engine will not operate properly. Be sure
that the drain valve is fully tightened.
1. Stop the vehicle andshut offthe engine.
2. Locate the DFCM and place an appropriate container under the drain
port (see illustration).
Fuel and Refueling
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•Normal operation: If the message appears during normal operation
when the vehicle / engine is fully warm, and fuel level is not low, the
fuel filters must be changed regardless of the maintenance schedule
interval.
•If replacement of the fuel filter does not remedy the low fuel pressure
message during normal operation as defined above, take the vehicle to
your authorized dealer.
CHANGING THE ENGINE-MOUNTED AND DFCM FUEL FILTERS
Your vehicle is equipped with two fuel filters; one is mounted on top of
the driver’s side of the engine and the second filter, inside the DFCM, is
mounted on the frame rail under the driver-side floorboard near the
transmission. Both filters should be replaced at the same time. Regular
fuel filter changes are an important part of engine maintenance; failing to
keep with the scheduled maintenance could lead to engine performance
issues and/or fuel injection system damage. Refer to thescheduled
maintenance informationof this supplement for more information.
Refer toMotorcraft part numbersin theMaintenancechapter for the
fuel filter replacement part number. This part number includes filters
and seals for both the engine-mounted and frame-mounted filters.
Removal - DFCM filter
The DFCM filter is located in the lower portion of the DFCM housing.
1. Drain the DFCM. SeeFuel filter/water separatorin theFuel and
Refuelingchapter.
To install the new DFCM filter, seeInstallation – DFCM filterin the
Fuel and Refuelingchapter.
2. Remove the lower portion of the
DFCM housing (filter bowl) by
turning it counterclockwise using a
32 mm socket.
Note:Depending on the amount
seal swelling, removal of the filter
bowl may be noisy and require some
effort. Replace the seal prior to
reinstalling the filter/bowl to
improve assembly.
3. Remove and discard the old fuel filter element.
4. Carefully clean the mating surfaces using a lint-free rag.
Fuel and Refueling
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INTEGRATED ENGINE BRAKING
This feature increases engine braking at higher engine speeds to provide
better grade descent control with less brake and transmission wear and
tear.
This feature is integrated with the tow/haul mode feature. When tow/haul
mode is switched on, the integrated engine braking feature will also be
active. For more information on tow/haul, seeAutomatic transmission
operationin theOwner Manual.
Brakes
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JUMP STARTING YOUR VEHICLE
Note:Do not attempt to push-start your automatic transmission vehicle.
Automatic transmissions do not have push-start capability. Attempting to
push-start a vehicle with an automatic transmission may cause
transmission damage.
The 6.7 diesel engine can be jump started using the same procedure as a
gasoline engine. Use the primary battery (battery located on the
passenger side) for any jump starting procedure and refer to your
Owner’s Manualfor the proper method of jump starting.
RUNNING OUT OF DEF (DIESEL EXHAUST FLUID)
If your vehicle runs out of DEF, it will enter into a speed limited mode
and can also enter into an idle-only mode. Normal vehicle operation will
not resume until DEF is refilled. See theSelective Catalytic Reduction
(SCR) Systemsection in theFuel and Refuelingchapter for more
information.
Contact roadside assistance for help in finding a retailer that sells DEF.
See theCustomer Assistancechapter in theOwner’s Manualfor more
information.
Roadside Emergencies
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UNDER HOOD OVERVIEW
F-Super Duty
A. Engine oil dipstick
B. Automatic transmission dipstick
C. Brake fluid reservoir
D. Power distribution box
E. Batteries
F. Engine cooling system coolant reservoir (primary high-temperature
cooling system)
G. Power steering fluid reservoir
H. Engine oil fill
I. Engine-mounted fuel filter assembly
J. Secondary cooling system coolant reservoir
K. Air filter assembly
L. Air filter restriction gauge
M. Windshield washer fluid reservoir
MEBC
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Maintenance
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Item Capacity Ford part nameFord part number /
Ford specification or
specification
Fuel tank — Dual
tanks40 gallon (151.4L)
and
28 gallon (106.0L)——
Automatic transmission
fluidRefer toOwner’s Manual
* Use only the recommended coolant for topping off and coolant changes. Using any other coolant
may result in vehicle damage.
Capacities and Specifications
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