cooling CADILLAC DEVILLE 1993 7.G Owners Manual

Downloaded from www.Manualslib.com manuals search engine - Engine Coolant Temperature Warning Light
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This light tells you that
your engine coolant has overheated or your
radiator cooling fans
are not working. If you
have been operating
your vehicle under
normal driving
conditions, you should
pull
off the road, stop
your vehicle and turn
-1 the engine off as soon
as possible.
HOT COOLANT CAN BURN YOU BADLY!
In “Problems on the Road,” this manual shows what to do. See “Engine
Overheating” in the Index.
Engine Temperature Warning Light
I This light tells you that
your engine has overheated.
If you have been operating your vehicle under normal driving conditions,
you should pull
off the road, stop the car and turn the engine off as soon
as possible.
A warning chime should also sound if you drive with this light
on. The chime will continue to sound until the ignition is turned
“off” or
the light goes out.
As a check, the light should come on for a few seconds
when you start your engine.
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Downloaded from www.Manualslib.com manuals search engine You can choose from 65 F (18 ’ C) to 85 F (29 ’ C). And, at each end,
you may choose
60 F (16 ’ C), for maximum cooling, and 90 F (33 ’ C),
for maximum heating.
Then, you have these choices:
Off
Nothing is on, but air will flow rnrough your vehicle if you are moving.
The system will attempt to maintain the chosen temperature, but may
never reach it, because the blower motor will not operate.
Econ
Use “Econ” in cold or cool weather, because it saves fuel by not allowing
the
A/C compressor to run. But it doesn’t remove humidity from the air.
If it’s so warm outside that you need to cool the air, use the next choice. I 1
Auto
In “Auto” its all automatic.
If your car is sitting out on a hot day and you have it set on “Auto”, the air
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will first flow out the floor air ducts for a few seconds. That’s normal.
This
is to prevent a blast of hot air hitting you.
Fan Speeds
m Th e speed of the
blower fan is usually
controlled
I I automatically if you
have the fan on “Auto
Fan”. However, if you
want the blower fan to
run only at high speed,
push the “Hi” button
until you see “Hi Fan”
on the display.
If you want the blower to run only at low speed, push the “Lo7’ button
until you see
“Lo Fan” on the display. If you want the system to be
automatic, but you like the fan speed a little higher than the “Auto Fan”
speed, push the
“LO” or “Hi” button until you see the “Hi Fan Auto Fan”
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Downloaded from www.Manualslib.com manuals search engine .- If you drive regularly in steep country, or if you’re planning to visit there,
here are some tips that can make your trips safer and more enjoyable.
0
0 Keep your vehicle in good shape. Check all fluid levels and also the
brakes, tires, cooling system and transaxle. These parts can work hard
on mountain roads.
Know how to go down hills. The most important thing to know is this:
let your engine do some
of the slowing down. Don’t make your brakes
do it all. Shift to
a lower gear when you go down a steep or long hill.
That way, you will slow down without excessive use of your brakes.
I
A CAUTION:
If you don’t shift down, your brakes could get so hot that they
wouldn’t work well. You would then have poor braking
or even
none going down a hill. You could crash. Shift down to let your
enginc ssist your brakes on a steep downhill slope.
- A ‘CAUTION:
Coasting downhill in “N” (Neutral) or with the ignition off is
dangerous. Your brakes will have to do all the work of sllowing
down. They could get so hot that they wouldn’t work well. You
could crash. Always have your engine running and your vehicle
i :ea when yo1 ,a downhill,
0 Know how to go uphill. Shift down to “3” (Drive). This will help cool
your engine and transaxle, and you can climb the hill better.
- 0 Stay in your own lane when driving on two-lane roads in hills or
mountains. Don’t swing wide or cut across the center
of the road.
Drive at speeds that let you stay in your own lane. That way, you won’t
be surprised by a vehicle coming toward you
in the same lane.
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Downloaded from www.Manualslib.com manuals search engine When You Are Ready to Leave After Parking on a Hill
1. Apply your regular brakes and hold the pedal down while you:
Start your engine;
0 Shift into a gear; and
0 Be sure the parking brake has released.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear
of the chocks.
4. Stop and have someone pick up and store the chocks.
Maintenance When Trailer Towing
Your vehicle will need service more often when you’re pulling a trailer.
See the Maintenance Schedule for more on this. Things that are
especially important in trailer operation are automatic transaxle fluid
(don’t overfill), engine oil, axle lubricant, belts, cooling system, and brake
adjustment. Each
of these is covered in this manual, and the Index will
help you find them quickly. If you’re trailering, it’s a good idea to review
these sections before you start your trip.
Check periodically to see that all hitch nuts and bolts are tight.
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Downloaded from www.Manualslib.com manuals search engine COOLING SYSTEM
. .. .. .
-6’ - ..... .3 c. .- c
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When you decide it’s safe to lift the hood, here’s what you’ll see:
Coolant recovery tank
7 Radiator pressure cap
7 Electric engine fans
’ A CAUTION: I
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 any underhood electric fan.
If the coolant inside the coolant recovery tank is boiling, don’t do
anything else until it cools down.
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Downloaded from www.Manualslib.com manuals search engine The coolant level should be at or above near “FULL COLD.” If it isn’t,
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.
Dodbrun 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 Pied before you drive the vehicle.
ng your engine witrwut coularr~ isn’t
If there seems to be no leak, 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.
239

Downloaded from www.Manualslib.com manuals search engine How to Add Coolant to the Coolant Recovery Tank
If you haven’t found a problem yet, but the coolant level isn’t at or above
near
“FULL COLD.” add a 50/50 mixture of clean water (preferably
distilled) and a proper antifreeze at the coolant recovery tank. (See
“Engine Coolant”
in the Index for more information about the proper
coolant mix.)
1
A CAUTION: i
Jding 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
a proper antifreeze.
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240

Downloaded from www.Manualslib.com manuals search engine c-
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.
I
When the coolant in the coolant recovery tank is at or above near “FULL
COLD,” start your vehicle.
If the overheat warning continues, there’s one more thing you can try.
You can add the proper coolant mix directly to the radiator, but be sure
the cooling system is cool before you do it.
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Downloaded from www.Manualslib.com manuals search engine 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 radiator pressure'cap
-- even a little -- they can come
out at high speed. Never turn the cap when the cooling system,
including the radiator pressure cap,
is hot. Wait for the cooling
system
and radiator pressure cap to cool if you ever have to turn
the pressure cap.
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Downloaded from www.Manualslib.com manuals search engine How to Add Coolant to the Radiator
1. You can remove the radiator pressure cap when the cooling system,
including the radiator pressure cap and upper radiator hose, is
no
longer hot. Turn the pressure cap slowly to the left 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.
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2. Then keep turning
the pressure cap,
but
now push
down
as you turn
it. Remove the
pressure cap.
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