2010 Mercury Mountaineer coolant temperature

What you should know about fail-safe cooling
(4.6L V8 engine only)
If the engine coolant supply is depleted, this feature allows the vehicle to
be driven temporarily before incremental component damage is incurred.
The “fail-safe” distance depends on ambient temperatures, vehicle load
and terrain.
Fail-safe cooling and engine oil overheat mode (4.6L V8 only)
If the engine coolant and/or engine oil overheat, the vehicle’s fail-safe
modes will reduce engine power to limit engine damage, even with a
total loss of coolant. The vehicle’s range and/or speed will be reduced,
depending on vehicle load, terrain, and outside temperatures.
The instrument cluster provides warnings for each mode.
•Fail-Safe Cooling Mode:The
(Service engine
soon),
(Engine oil pressure), and(Engine coolant
temperature) indicators will be on.
Along with these warning indicators, the engine coolant temperature
gauge will read in the Hot (H) area.
If the engine coolant reaches even hotter temperatures, fail-safe
cooling mode limits engine power more and disables air conditioning.
The engine will switch to alternating cylinder operation to help cool
the engine. The engine will run rough in this mode.
If continued operation increases the engine coolant temperature to a
critical range, the engine will shut down. Steering and braking effort
will increase. Once engine coolant temperature cools, the engine can
be restarted.
•Engine Oil Overheat Mode:The
(Engine coolant temperature)
indicator will be on. The instrument cluster has no separate oil
temperature indicator.
Along with the
(Engine coolant temperature) indicator, the engine
coolant temperature gauge will read in the Hot (H) area.
Oil overheat can be triggered in severe driving conditions, such as
towing heavy loads over mountainous terrain in extreme hot
temperatures. As oil temperature increases, engine and vehicle speed
will be limited. The transmission will also shift differently.
When the engine oil has cooled, the vehicle will perform normally.
Maintenance and Specifications
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2010 Mountaineer(mnt)
Owners Guide(own2002), 1st Printing
USA(fus)

The OBD-II system is designed to check the emission control system
during normal driving. A complete check may take several days. If the
vehicle is not ready for I/M testing, the following driving cycle consisting
of mixed city and highway driving may be performed:
15 minutes of steady driving on an expressway/highway followed by
20 minutes of stop-and-go driving with at least four 30-second 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. If
the vehicle is still not ready for I/M testing, the above driving cycle will
have to be repeated.
POWER STEERING FLUID
Check the power steering fluid. Refer toscheduled maintenance
information.
1. Start the engine and let it run
until it reaches normal operating
temperature (the engine coolant
temperature gauge indicator will be
near the center of the normal area
between H and C).
2. While the engine idles, turn the
steering wheel left and right several
times.
3. Turn the engine off.
4. Check the fluid level in the reservoir.
5. The fluid level should be between the MIN and MAX lines. Do not add
fluid if the level is in this range.
6. If the fluid is low, add fluid in small amounts, continuously checking
the level until it reaches the correct operating range. Be sure to put the
cap back on the reservoir. Refer toMaintenance product specifications
and capacitiesin this chapter for the proper fluid type.
Maintenance and Specifications
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2010 Mountaineer(mnt)
Owners Guide(own2002), 1st Printing
USA(fus)

Child safety seats - booster
seats ...........................................220
Cleaning your vehicle
engine compartment ..............329
instrument panel ....................331
interior .....................................332
plastic parts ............................330
washing ....................................327
waxing .....................................328
wheels ......................................328
wiper blades ............................330
Climate control (see Air
conditioning or Heating) ............91
Clock adjust
6-CD in dash .............................42
AM/FM/CD .................................34
Compass, electronic
set zone adjustment .................25
Console ..............................111–112
overhead ..................................110
rear ..........................................112
Controls
power seat ...............................161
steering column ......................121
Coolant
checking and adding ..............348
refill capacities ................352, 371
specifications ..........................371
Cruise control
(see Speed control) ..................118
Customer Assistance ................292
Ford Extended Service
Plan ..........................................381
Getting assistance outside the
U.S. and Canada .....................324
Getting roadside assistance ...292
Getting the service you
need .........................................320Ordering additional owner’s
literature .................................325
Utilizing the
Mediation/Arbitration
Program ...................................324
D
Daytime running lamps
(see Lamps) ................................97
Defrost
rear window ..............................95
Dipstick
automatic transmission
fluid ..........................................367
engine oil .................................341
Driveline universal joint and
slip yoke ....................................368
Driving under special
conditions ..................282, 286, 289
sand .........................................287
snow and ice ...........................290
through water .................288, 291
Dual automatic temperature
control (DATC) ...........................91
DVD system .................................56
E
Electronic message center .........19
Emergencies, roadside
jump-starting ..........................312
running out of fuel .........312, 359
Emergency Flashers .................293
Emission control system ..........363
Engine ........................................376
cleaning ...................................329
coolant .....................................348
fail-safe cooling .......................353
Index
385
2010 Mountaineer(mnt)
Owners Guide(own2002), 1st Printing
USA(fus)