1998 CADILLAC ELDORADO coolant

Downloaded from www.Manualslib.com manuals search engine 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 aifflow
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.
Manual Operation
You may manually adjust the air delivery mode or
fan speed.
/J AC: This setting directs airflow through the
A0
middle instrument panel outlets.
l# 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.
'fl HEATER/DEFROST: This setting directs air to
the floor outlets and toward the windshield.
I# HEATER: This'setting directs warmed air
through the
floor outlets. Some warm air is diverted to
the windshield to minimize fogging.
A0
w.
0
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.
3-4

Downloaded from www.Manualslib.com manuals search engine % FAN SPEEDS: Press the button with the fan
symbol
on it until AUTO is displayed on the screen.
At this setting, the fan speed is automatically 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 warm, the controller allows the fan
to gradually
increase to
a higher speed. This prevents cold air from
blowing into the passenger compartment. If
you want
the blower fan at a high speed, press the up arrow button
until
you see HI on the display. If you want the fan
speed to be automatic, but you like 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
arrow button until
LO is shown on the display. If you
want the fan speed to
run lower than the AUTO
setting, press the button until LO 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.
AC: Press this button to turn the air conditioning on and
off. The system will cool and dehumidify the air inside
the vehicle. In the
AUTO mode, the display will show
that
AC is active, but the air conditioning compressor
only operates when the system determines it
is needed.
RECIRCULATION: Press this button to limit the
amount
of fresh air entering your vehicle. This is helpful
when you are trying to cool the air quickly or limit odors
entering your vehicle.
In the AUTO mode, the system
will use recirculation as necessary
to cool the air.
Pressing the recirculation button will change the
operation to a manual mode and the air will recirculate
non-stop. Press this button again to turn
off the
recirculation feature.
If
you notice the windows fogging, press the
recirculation button to exit the recirculation mode.
3-5

Downloaded from www.Manualslib.com manuals search engine Engine Overheating
You will find an ENGINE COOLANT HOT, IDLE
ENGINE message or an ENGINE OVERHEATED,
STOP ENGINE message
on the Driver Information
Center (DIC).
You will also hear a chime. 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.
Overheated Engine Protection
Operating
Mode
Should an overheated engine condition exist and the
message ENGINE OVERHEATED
STOP ENGINE 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. Repair
the cause of coolant loss, change the oil and reset
the oil life indicator. See “Engine Oil, When to
Change”
in the Index.
5-15

Downloaded from www.Manualslib.com manuals search engine If Steam Is Coming From Your Engine
L
A CAUTION:
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 hear steam coming
from it. Just turn it
off and get everyone 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.
5-16

Downloaded from www.Manualslib.com manuals search engine 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.
If No Steam Is Coming From Your Engine
If you get the overheat warning but see or hear no
steam, the problem may
not be too serious. Sometimes
the engine can get a little too hot when you:
Climb a long hill on a hot day.
Stop after high-speed driving.
Idle for long periods in traffic.
Tow a trailer.
If you get the overheat warning with no sign of steam,
try this for a minute or
so:
1. Turn off your air conditioner.
2. Dial temperature control to the highest heat setting
and open the windows, as necessary.
3. If you’re in a traffic jam, shift to NEUTRAL (N);
otherwise, shift to the highest gear while
driving
-- OVERDRIVE (0) or THIRD (3).
If you no longer have the overheat warning, you can
drive. Just to be safe, drive slower for about
10 minutes.
If the warning doesn’t come back on,
you can
drive normally.
If the warning continues, pull over, stop, and park your
vehicle right away.
If there’s still no sign of steam, you can idle the engine
for two or three rqinutes while you’re parked,
to see
if the warning stops. But then, if you still have the
warning,
turn off the engine and get everyone out of
the vehicle until it cools down. Also, see “Overheated
Engine Protection Operating Mode” listed previously
in this section.
You may decide not
to lift the hood but to get service
help right away.
5-17

Downloaded from www.Manualslib.com manuals search engine When you decide it’s safe to lift the hood, here’s what
you’ll see:
A CAUTION:
An electric engine cooling 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 any underhood electric fan.

A. Coolant Surge Tank with Pressure Cap
B. Electric Engine Fans
If the coolant inside the coolant surge tank is boiling,
don’t do anything else until it cools down.
5-18

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 cooling fans are running. If the
engine is overheating, both fans should be running. If
they aren’t, your vehicle needs service.
5-19

Downloaded from www.Manualslib.com manuals search engine How to Add Coolant to the Coolant
Surge
Tank
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.)
A CAUTION:
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
-0 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.
I
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 mixture will. Your vehicle’s coolant
warning system
is set for the proper coolant
mixture. With plain water or the wrong mixture,
your engine could get too hot but you wouldn’t
CAUTION: (Continued)
5-20