2002 FORD EXPLORER engine overheat

Optional instrument cluster gauges
Speedometer
Indicates the current vehicle speed.
Engine coolant temperature gauge
Indicates the temperature of the
engine coolant. At normal operating
temperature, the needle remains
within the normal area (the area
between the ªHº and ªCº). If it
enters the red section, the engine is
overheating. Stop the vehicle as
soon as safely possible, switch off
the engine immediately and let the
engine cool. Refer toEngine
coolantin theMaintenance and
carechapter.
Never remove the coolant reservoir cap while the engine is
running or hot.
O/D
OFF
4X4
LOW
4X4
HIGH
CHECK
FUEL
CAPTHEFT
BRAKE
SERVICE
ENGINE
SOON
Instrumentation
14

Door ajar Warning cannot be reset
Low oil pressure Warning returns after 10 minutes
Check engine temperature
Check charging system
Transmission overheated
Check transmission
Low fuel level
Low brake fluid level Warning returns after the ignition key
is turned from OFF to ON.
Change oil soon
Oil change required
Low washer fluid level
DOOR AJAR.Displayed when a door or liftgate is not completely
closed.
LOW OIL PRESSURE.Displayed when the engine oil level is low. If
this warning message is displayed, check the level of the engine oil.
Refer toEngine oilin theMaintenance and carechapter for
information about adding engine oil.
CHECK ENGINE TEMP.Displayed when the engine coolant is
overheating. Stop the vehicle as soon as safely possible, turn off the
engine and let it cool. Check the coolant and coolant level. Refer to
Engine coolantin theMaintenance and carechapter. If the warning
stays on or continues to come on, contact your dealer as soon as safely
possible.
CHECK CHARGING SYSTEM.Displayed when the electrical system is
not maintaining proper voltage. If you are operating electrical accessories
when the engine is idling at a low speed, turn off as many of the
electrical loads as soon as possible. If the warning stays on or comes on
when the engine is operating at normal speeds, have the electrical
system checked as soon as possible.
TRANSMISSION OVERHEATED.Indicates the transmission is
overheating. This warning may appear when towing heavy loads or when
driving in a low gear at a high speed for an extended period of time.
Stop the vehicle as soon as safely possible, turn off the engine and let it
cool. Refer toTransmission fluidin theMaintenance and care
chapter. If the warning stays on or continues to come on, contact your
dealer for transmission service as soon as possible.
Instrumentation
25

If your vehicle gets stuck in mud or snow it may be rocked out by
shifting between forward and reverse gears, stopping between shifts, in a
steady pattern. Press lightly on the accelerator in each gear.
Do not rock the vehicle if the engine is not at normal operating
temperature or damage to the transmission may occur.
Do not rock the vehicle for more than a few minutes or damage
to the transmission and tires may occur or the engine may
overheat.
Always set the parking brake fully and make sure the gearshift is
latched in P (Park). Turn off the ignition whenever you leave
your vehicle.
If the parking brake is fully released, but the brake warning lamp
remains illuminated, the brakes may not be working properly.
See your dealer or a qualified service technician.
Driving with a 5±speed automatic transmission (if equipped)
Your automatic transmission electronically controls the shift feel by using
an adaptive learning strategy. This feature is designed to increase
durability, and provide consistent shift feel over the life of the vehicle. It
is normal for a new transmission to shift firmly. This operation is
considered normal and will not affect function or durability of the
transmission. Once the vehicle is at operating temperature it may take
several shifts at the same operating condition for the transmission to
properly adapt. Over time the adaptive learning process will fully update
transmission operation. The more varied the driving habits, speed and
torque, the longer it may take to adapt but the more complete the
process will be.
When the battery is disconnected or a new battery installed, the
transmission must relearn 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.
Driving
182

You should either know the terrain or examine maps of the area before
driving. Map out your route before driving in the area. For more
information on driving off-road, read the ªFour Wheelingº supplement in
your owner's portfolio.
If your vehicle gets stuck
If the vehicle is stuck in mud or snow it may be rocked out by shifting
from forward and reverse gears, stopping between shifts, in a steady
pattern. Press lightly on the accelerator in each gear.
Do not rock the vehicle if the engine is not at normal operating
temperature or damage to the transmission may occur.
Do not rock the vehicle for more than a few minutes or damage
to the transmission and tires may occur or the engine may
overheat.
Do not spin the wheels at over 56 km/h (35 mph). The tires may
fail and injure a passenger or bystander.
Sand
When driving over sand, try to keep all four wheels on the most solid
area of the trail. Do not reduce the tire pressures but shift to a lower
gear and drive steadily through the terrain. Apply the accelerator slowly
and avoid spinning the wheels.
Mud and water
If you must drive through high water, drive slowly. Traction or brake
capability may be limited.
When driving through water, determine the depth; avoid water higher
than the bottom of the hubs (if possible) and proceed slowly. If the
ignition system gets wet, the vehicle may stall.
Once through water, always try the brakes. Wet brakes do not stop the
vehicle as effectively as dry brakes. Drying can be improved by moving
your vehicle slowly while applying light pressure on the brake pedal.
After driving through mud, clean off residue stuck to rotating driveshafts
and tires. Excess mud stuck on tires and rotating driveshafts causes an
imbalance that could damage drive components.
If the transmission, transfer case or front axle are submerged in water,
their fluids should be checked and changed, if necessary.
Driving
192

Trailer towing table (4x2 w/manual transmission)
GCWR (Gross Combined Weight Rating)/Trailer weights
EngineRear
axle
ratioMaximum
GCWR-kg
(lbs.)Trailer weight
range-kg (lbs.)
(0-Maximum)Maximum
frontal area of
trailer-m
2(ft2)
4.0L
SOHC3.732 951
(6 500)0-1 022
(0-2 300)4.64
(50)
Notes:-For high altitude operation, reduce GCW by 2% per 300
meters (1 000 ft) elevation. For definitions of terms used in this table
and instructions on how to calculate your vehicle load, refer toVehicle
loadingin this chapter. Maximum trailer weights shown. The
combined weight of the completed towing vehicle and the loaded
trailer must not exceed the GCWR.
Towing a trailer over 1 588 kg (3 500 lbs.) requires a weight
distributing hitch.
4x2 w/automatic transmission
GCWR (Gross Combined Weight Rating)/Trailer Weight
Engine Rear axle ratio Maximum
GCWR-kg
(lbs.)Trailer weight
range-kg (lbs.)
(0-Maximum)
4.0L SOHC/4.6L 3.27/3.55 3 495 (7 700) 0-1 589
(0-3 500)
4.0L SOHC 3.73 LS 4 645 (10 240) 0-2 694
(0-5 940)
4.6L* 3.73 LS 5 262 (11 600) 0-3 314
(0-7 300)
Notes:-For high altitude operation, reduce GCW by 2% per 300
meters (1 000 ft) elevation. For definitions of terms used in this table
and instructions on how to calculate your vehicle load, refer toVehicle
loadingin this chapter. Maximum trailer weights shown. The
combined weight of the completed towing vehicle and the loaded
trailer must not exceed the GCWR.
*-When towing maximum loads under high outside temperatures and
on steep grades, the A/C system may cycle on and off to protect the
engine from overheating. This may result in a temporary increase of
interior temperatures.
Towing a trailer over 1 588 kg (3 500 lbs.) requires a weight
distributing hitch.
Driving
198

Trailer towing table (4x4 w/manual transmission)
GCWR (Gross Combined Weight Rating)/Trailer weights
EngineRear
axle
ratioMaximum
GCWR-kg
(lbs.)Trailer weight
range-kg (lbs.)
(0-Maximum)Maximum
frontal area of
trailer-m
2(ft2)
4.0L
SOHC3.732 951
(6 500)0-908
(0-2 000)4.64
(50)
Notes:- For high altitude operation, reduce GCW by 2% per 300
meters (1 000 ft) elevation. For definitions of terms used in this table
and instructions on how to calculate your vehicle load, refer toVehicle
loadingin this chapter. Maximum trailer weights shown. The
combined weight of the completed towing vehicle and the loaded
trailer must not exceed the GCWR.
Towing a trailer over 1 588 kg (3 500 lbs.) requires a weight
distributing hitch.
4x4 w/automatic transmission
GCWR (Gross Combined Weight Rating)/Trailer Weight
Engine Rear axle ratio Maximum
GCWR-kg
(lbs.)Trailer weight
range-kg (lbs.)
(0-Maximum)
4.0L SOHC/4.6L 3.55 3 632 (8 000) 0-1 589
(0-3 500)
4.0L SOHC 3.73 LS 4 540 (10 000) 0-2 497
(0-5 500)
4.6L* 3.73 LS 5 262 (11 600) 0-3 178
(0-7 000)
Notes:-For high altitude operation, reduce GCW by 2% per 300
meters (1 000 ft) elevation. For definitions of terms used in this table
and instructions on how to calculate your vehicle load, refer toVehicle
loadingin this chapter. Maximum trailer weights shown. The
combined weight of the completed towing vehicle and the loaded
trailer must not exceed the GCWR.
*-When towing maximum loads under high outside temperatures and/or
on steep grades, the A/C system may cycle on and off to protect the
engine from overheating. This may result in a temporary increase of
interior temperatures.
Towing a trailer over 1 588 kg (3 500 lbs.) requires a weight
distributing hitch.
Driving
199

²A large amount of water without engine coolant may be added, in case
of emergency, to reach a vehicle service location. In this instance, the
cooling system must be drained and refilled with a 50/50 mixture of
engine coolant and distilled water as soon as possible. Water alone
(without engine coolant) can cause engine damage from corrosion,
overheating or freezing.
²
Do not use alcohol, methanol or brine or any engine coolants
mixed with alcohol or methanol antifreeze (coolant).Alcohol and
other liquids can cause engine damage from overheating or freezing.
²Do not add extra inhibitors or additives to the coolant.These
can be harmful and compromise the corrosion protection of the engine
coolant.
²Do not mix with recycled coolant unless from a Ford-approved
recycling process (seeUse of Recycled Engine Coolantsection.
For vehicles with overflow coolant systems with a non-pressurized cap
on the coolant recovery system, add coolant to the coolant recovery
reservoir when the engine is cool. Add the proper mixture of coolant and
water to the ªcold fullº level. For all other vehicles, which have a coolant
degas system with a pressurized cap, or if it is necessary to remove the
coolant pressure relief cap on the radiator of a vehicle with an overflow
system, follow these steps to add engine coolant.
To avoid personal injury, make sure the engine is cool before
unscrewing the coolant pressure relief cap. The cooling system is
under pressure; steam and hot liquid can come out forcefully when the
cap is loosened slightly.
1. Before you begin, turn the engine off and let it cool.
2. When the engine is cool, wrap a thick cloth around the coolant
pressure relief cap on the coolant reservoir (an opaque plastic bottle).
Slowly turn cap counterclockwise (left) until pressure begins to release.
3. Step back while the pressure releases.
4. When you are sure that all the pressure has been released, use the
cloth to turn it counterclockwise and remove the cap.
5. Fill the coolant reservoir slowly with the proper coolant mixture (see
above), to within the ªcold fill rangeº or the ªcold fullº level on the
reservoir. If you removed the radiator cap in an overflow system, fill the
radiator until the coolant is visible and radiator is almost full.
Maintenance and care
244

6. Replace the cap. Turn until tightly installed. (Cap must be tightly
installed to prevent coolant loss.)
After any coolant has been added, run the engine for a few minutes to
mix the coolant. Check the coolant concentration. Make sure the engine
is off and cool before removing the coolant pressure relief cap (see
proceeding steps on cap removal). Check the concentration per the
Checking Engine Coolantsection. If the concentration is not 50/50
(protection to ±34ÉF/±36ÉC), drain some coolant and adjust the
concentration. It may take several drains and additions to obtain a 50/50
coolant concentration.
Whenever coolant has been added, the coolant level in the coolant
reservoir should be checked the next few times you drive the vehicle. If
necessary, add enough 50/50 concentration of engine coolant and
distilled water to bring the liquid level to the proper level.
If you have to add more than 1.0 liter (1.0 quart) of engine coolant per
month, have your dealer check the engine cooling system. Your cooling
system may have a leak. Operating an engine with a low level of coolant
can result in engine overheating and possible engine damage.
Recycled engine coolant
Ford Motor Company recommends the use of a recycled engine coolant
produced by Ford-approved processes in vehicles originally equipped
with Motorcraft Premium Engine Coolant (green-colored). However, not
all coolant recycling processes produce coolant that meets Ford
specification ESE-M97B44±A. Use of such coolant may harm the engine
and cooling system components.
Ford Motor Company does NOT recommend the use of recycled engine
coolant in vehicles originally equipped with Motorcraft Premium Gold Engine
Coolant since a Ford-approved recycling process is not yet available.
Used engine coolant should be disposed of in an appropriate
manner. Follow your community's regulations and standards for recycling
and disposing of automotive fluids.
Coolant refill capacity
To find out how much fluid your vehicle's cooling system can hold, refer
toRefill capacitiesin theCapacities and specificationschapter.
Fill your engine coolant reservoir as outlined inAdding engine coolant
in this chapter.
Maintenance and care
245