1997 CADILLAC SEVILLE engine coolant

Downloaded from www.Manualslib.com manuals search engine To-find your comfort zone, start with the 75°F (24°C)
setting and allow about 20 minutes for the system to
regulate. Turn the
TEMP/AUTO knob to adjust the
temperature if necessary.
If you choose 60°F ( 1 6"C),
the system will remain at that maximum cooling setting
and will
not regulate fan speed. If you choose the
temperature of
90°F (32'C), the system will remain at
that maximum heating setting and will not regulate fan
speed. Choosing either maximum setting will not cause
the system
to heat or cool any faster.
With
the: automatic setting, the air conditioning
compressor automatically cycles
when needed to cool
the air. In cold weather, when the system senses the need
for heat, the airflow will be directed out the floor
outlets.
As the interior temperature approaches a desired
setting, the blower speed will decrease.
To maintain
interior comfort, the airflow may move
to the instrument
panel air outlets and floor outlets (bi-level mode). On
bright
sunny days in cold weather. the airflow may come
out
of the air conditioning outlets (AC mode) to
maintain comfort and prevent stuffiness.
If your vehicle is sitting out on a hot day and you have it
set on AUTO, the air will first flow out the floor air
outlets for
a few seconds. That is normal. This is to
expel hot air from the air outlets. As the air
is cooled,
the airflow will move through the air conditioning
outlets. If you start your vehicle with the fan setting on
HI, it will skip the air conditioning purge.
To avoid blowing cold air in cold weather, the system
will delay turning on the fan
until warm air is available.
The length
of delay depends on the outside air
temperature, engine coolant temperature or the time
since the engine was last started.
As the coolant warms
up, the blower fan speed will gradually increase and
air will flow from the heater outlets, with some airflow
to the windshield to prevent fogging under most
normal conditions.
If you leave your vehicle, the system will remember the
control setting the next time
you start your engine,
except for recirculation and defrost. Each ignition cycle
cancels recirculation, whereas,
DEFROST will change
to automatic operation when the ignition is shut off and
then turned back
on.

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You may manually adjust the air delivery mode or
fan speed.
A*
fl AC: This setting directs airflow through the
middle instrument panel outlets.
be
BI-LEVEL: This setting directs air into your
vehicle in two
ways. Cool air is directed to the upper
portion
of your body through the four instrument panel
outlets while warmed air is directed to the floor.
'H HEATER/DEFROST: This setting directs air to
the floor outlets and toward the windshield.
we
e
HEATER: This setting directs warmed air
through
the floor outlets. Some warm air is diverted to
the windshield to minimize fogging.
DEFROST Press this button to quickly remove
fog or frost from the windshield.
This setting sends most
of
the airflow to the windshield with only a small
amount
to the floor outlets.
3f FAN SPEEDS: Press the button with the fan symbol
on it until AUTO is displayed on the screen. At this
setting. the
Fdn speed is autonratically controlled. If it is
cold outside. the blower may not run in the maximum high
fan speed right away. The system checks the temperature
of the engine coolant
to assure it is warm enough to
provide heat.
When the engine coolant is warrn, the
controller allows the
fan to gradually increase to a higher
speed. This prevznts cold air from blowing into the
passenger compartment.
If you want the blower fdn at a
high speed, press the up arl-ujw button until you see €31 on
the display.
If you want the fan speed to be automatic, but
you
Iike the fan speed to be higher than the AUTO setting,
press the fan
symbol button until HI AUTO is shown on
the display.
If you 'want the blower Fan at a low speed,
press the down
mow button until LO is shown on the
display.
If you want the fan speed to mn lower than the
AUTO setting, press the button until L,O AUTO is shown
on the display.
OFF: Press this button to turn the system off. Fresh air
will continue to flow through the vehicle, and the
system will try to maintain the previously set
temperature. The outside temperature will
show on the
display when the system
is OFF.

Downloaded from www.Manualslib.com manuals search engine You will find an ENGINE COOLANT HOT-IDLE
ENGINE message or a STOP ENGINE ENGINE
OVERHEATED message
on the Driver Information
Center
(DIC). There is also an engine temperature
warning light and/or gage on the instrument panel.
See “Engine Coolant Temperature Warning Light”
or “Engine Coolant Temperature Gage” in the Index
Should a low coolant condition exist and the message
STOP ENGINE ENGINE OVERI-IEATED is displayed,
an overheat protection mode which alternates firing
groups of four cylinders helps prevent engine damage.
In this mode,
you will notice a loss in power and engine
performance. This operating mode allows your vehicle
to be driven
to a safe place in an emergency; you may
drive up
to 50 miles (80 km). Towing a trailer in the
overheat protection mode should be avoided.
NOTICE:
After driving in the overheated engine protection
operating mode, to avoid engine damage.
allow
the engine to cool before attempting any repair.
The engine
oil will be severely degraded. Kcpair
the cause
of coolant loss, change the oil and reset
the
oil life indicator. See “Engine Oil, lli’hcn to
Change” in the Index.

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Steam from an overheated engine can burn you
badly,
even if you ,just open the hood. Stay away
from the engine
if you see or hcur steam coming
from
it. Just turn it off and get c’veryone away
from the vehicle until
it cools down. Wait until
there is no sign
of steam or coolant before you
open the hood.
If you keep driving when your engine is
overheated, the liquids in it can catch fire.
You or
others could be
badly burned. Stop your engine if
it overheats, and get out of the vehicle until the
engine
is cool.
I NOTICE:
If your engine catches fire because you keep
driving with no coolant, your vehicle can be
badly damaged. The costly repairs would not be
covered by your warranty. See “Overheated
Engine Protection Operating
Mode” in the Index.

Downloaded from www.Manualslib.com manuals search engine When you decide it's safe to lift the hood, here's what
you'll
see: I A CAUTION:
... ..
' . ..
.. , . . .: An electric fan under the hood can start up even
.. . -.. : .. .. -. . ...:. when the engine is not running and can injure
. ..... . . .. . you. Keep hands, clothing and
tools away from
.. i . .. . . .. . . . .. . .
.. .. .. .. . ,.. :. .
..
any underhood electric fan.
I I
If the coolant inside the coolant surge tank is boiling.
don't do anything else
until it cools down.
A. Coolant Surge Tank with Pressure Cap
B. Electric Engine Fans

Downloaded from www.Manualslib.com manuals search engine If it isn’t, the coolant level should be indicated by a
CHECK COOLANT LEVEL message on the Driver
Information Center.
If it is, you may have a leak in the
radiator hoses, heater hoses, radiator, water
pump or
somewhere else in the cooling system.
A CAUTION:
Heater and radiator hoses, and other engine
parts, can be very hot. Don’t touch them. If
you
do, you can be burned.
Don’t run the engine
if there is a leak. If you run
the engine, it could
lose all coolant. That could
cause an engine fire, and you could be burned.
Get any leak fixed before you drive the vehicle.
NOTICE:
Engine damage if you keep running your engine
without coolant isn’t covered by your warranty.
See “Overheated Engine Protection Operating
Mode” in the Index.
If there seems to be no leak, with the engine on, check to
see if the electric engine fans are running. If the engine
is overheating, both fans should be running. If they
aren’t, your vehicle needs service.

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If you haven’t found a problem yet, but the coolant level
isn’t at the proper level
(2.5 inches (6.4 cm) below the
base
of the fill neck), add a 50/50 mixture of clean
water (preferably distilled) and DEX-COOL“ coolant at
the coolant surge tank, but be sure the cooling system,
including the coolant surge tank pressure cap,
is cool
before
you do it. (See “Engine Coolant” in the Index for
more information.)
* 0
Steam and scalding liquids from a hot cooling
system
can blow out and burn you badly. They are
under pressure, and if you turn the coolant surge
tank pressure cap
-- even a little -- they can come
out at high
speed. Never turn the cap when the
cooling system, including the coolant surge
tank
pressure cap, is hot. Wait for the cooling system
and coolant surge
tank pressure cap to cool if you
ever have to turn the pressure cap.

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Adding only plain water to your cooling system
can be dangerous. Plain water, or some other
liquid like alcohol, can boil before the proper
coolant mix will. Your vehicle’s coolant warning
system
is set for the proper coolant mix. With
plain water or the wrong
mix, your engine could
get too hot but you wouldn’t get the overheat
warning. Your engine could catch fire and you or
others could be burned. Use
a 50/50 mix of clean
water and DEX-COOL@coolant.
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