1997 CADILLAC SEVILLE Owners Manual

Downloaded from www.Manualslib.com manuals search 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:
0 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
3. If you’re in a traffic jam, shift to NEUTRAL (N);
and open the window, as necessary.
otherwise, shift
to the highest gear while
driving
-- OVERDRIVE (@) 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
€or
two or three minutes while you’re parked, to see if
the warning stops. But then,
if you still have the
warning.
tcrm off the engine urzd get evenorze ow of the
vehide 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.

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.

Downloaded from www.Manualslib.com manuals search engine -~
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.
1

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NOTICE:
In cold weather, water can freeze and crack the
engine, radiator, heater core and other
parts. So
use the recommended coolant.
A CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol
and it will burn if the engine parts are hot
enough. Don't spill coolant
on a hot engine.
1. You can remove the coolant surge tank pressure cap
when
the cooling system, including the coolant surge
tank pressure cap and upper radiator hose,
is no
longer hot. Turn the pressure cap slowly
counterclockwise until it first stops. (Don't press
down while turning the pressure cap.)
If you hear a hiss, wait for that to stop. A hiss means
there
is still some pressure left.

Downloaded from www.Manualslib.com manuals search engine 1
2. Then keep turning the cap, but now push down as
you turn it. Remove the pressure cap.
3. Then fill the coolant surge tank with the proper mix,
up to the base of the filler neck.

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4. With the coolant surge tank pressure cap off, start
the engine and let it run
until you can feel the upper
radiator hose getting hot. Watch
out for the
engine fans.
By this time, the coolant level inside the coolant
surge tank may be lower.
If the level is lower, add
more of the proper mix to the coolant surge tank
until the level reaches about 2.5 inches (6.4 cm)
below the
bass of the filler neck.
5. Then replace the pressure cap. Be sure the arrows on
the pressure cap line up like this.
Start the engine
and allow it to warm up. If the CHECK
COOLANT LEVEL message does not appear
on the
Driver Information Center. coolant
is at the proper fill
level.
If a CHECK COOL.ANT LEVEL message does
appear. repeat Steps 1 through 3 or see your dealer.