engine coolant CADILLAC DEVILLE 1994 7.G User Guide

Downloaded from www.Manualslib.com manuals search engine COOLING SYSTEM
When you decide it’s safe to lift the hood, here’s what you’ll see:
Coolant recovery tank
Radiator pressure cap
Electric engine fans
. . ..~ . -~~ . .- - .
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 any underhood eIectric fan.
If the coolant inside the coolant recovery tank is boiling, don’t do
anything else until
it cools down.

Downloaded from www.Manualslib.com manuals search engine The coolant level should be at or above the FULL COLD marking on the
coolant recovery tank.
If it isn’t, you may have a coolant leak somewhere
in the cooling system.
NOTICE:
Engine damage from running your engine without coolant isn’t
covered by your warranty.
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.
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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 near
“FULL COLD” on the coolant recovery tank, 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 ififormation
about the proper coolant mix)
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NOTICE:
In cold weather, water can freeze and crack the engine, radiator,
heater core and other parts. Use the recommended coolant.
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Downloaded from www.Manualslib.com manuals search engine 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 -- 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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Downloaded from www.Manualslib.com manuals search engine 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,
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1. You can remove the radiator pressure cap when the cap and upper
radiator hose are no longer hot.
0 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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Downloaded from www.Manualslib.com manuals search engine 4. Then fill the
coolant recovery
tank to
the FULL
COLD mark.
5. Put the cap back
on
the coolant
recovery tank, but
leave the radiator
pressure cap
off.
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2.
LI
LA

Downloaded from www.Manualslib.com manuals search engine 6. Start the engine
and let it run until
you can
feel the
upper radiator hose
getting hot.
Watch out for the
engine fans.
7. By this time the coolant level inside the radiator filler neck may be
lower. If the level is lower, add more of the proper mix to the radiator
until the level reaches the base
of the radiator filler neck.
8. Replace the
pressure cap. Be
sure the arrows on
the pressure cap
line up like this.

Downloaded from www.Manualslib.com manuals search engine . A CAUTION:
An electric fan under the hood can start up and injure you even
when the engine is not running. Keep hands, clothing and tools
away from any underhood electric fan.
A CAUTION:
Things that burn can get on hot engine parts and start a fire.
These include liquids like gasoline, oil, coolant, brake fluid,
windshiefd washer and other fluids, and plastic
or rubber, You
or others could be burned, Be careful not to drop or spill things
that
will burn onto a hot engine.
Fluid Usage Label
Use the fluid usage label to identify the correct fluid you want to check.
GREEN: Engine Coolant
ORANGE: Power Steering Fluid
YELLOW Engine Oil
RED: Transmission Fluid
WHITE: Brake Fluid
BLUE: Washer Fluid
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Downloaded from www.Manualslib.com manuals search engine Engine Oil Additives
Don’t add anything to your oil. Your Cadillac dealer is ready to advise if
you think something should be added.
Men to Change Engine Oil
Your Cadillac has an “Oil Life Indicator.” This feature will let you know
when to change your oil
-- usually between 3,000 miles (5 000 km) and
7,500 miles (12 500 km) since your last oil change. Under severe
conditions, the indicator may come on before
3,000 miles (5 000 km).
Never drive your vehicle more than
7,500 miles (12 500 km) or 12 months
without an oil change.
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The system won’t detect dust in the oil. So, if you drive in a dusty area, be
sure to change your oil every 3,000 miles (5 000 km) or sooner if the
“CHANGE ENGINE OK’ message is displayed. Remember to reset the
‘ ’
Oil Life Indicator when the oil has been changed. For more information,
see
“Oil Life Indicator” in the Index.
7
How to Reset the Oil Life Indicator
After the oil has been changed, display the “OIL LIFE LEFT” message
by pressing the INFORMATION button. Then press and hold the
RESET button until the display shows “100”. This resets the oil life index.
The message
will remain off until the next oil change is needed. The
percentage
of oil life remaining may be checked at any time by pressing
the INFORMATION button several times until the “OIL LIFE LEFT”
message appears. For more information on the Oil Life Index feature, see
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“Oil Life Index” in the Index.
Engine Coolant Heater (Engine Block Heater)
An engine coolant heater can be a big help if you have to park outside in
very cold weather,
0°F (-18°C) or colder. If your vehicle has this option,
see “Engine Coolant Heater” in the Index.
264

Downloaded from www.Manualslib.com manuals search engine When the correct fluid level is obtained, push the dipstick back in all -
the way.
ENGINE COOLANT 7
The following explains your cooling system and how to add coolant when (. I
it is low. If you have a problem with engine overheating, see “Engine
Overheating” in the Index.
The proper coolant for your Cadillac will:
0 Give freezing protection down to -34°F (-37OC) .
0 Give boiling protection up to 262 F (128 C) .
0 Prote-ct against rust and corrosion.
Help keep the proper engine temperature.
Let the warning-lights work as they shoula.
What to Use
Use a mixture of one-half clean water (preferably distilled) and one-half
antifreeze that meets
“GM specification 1825-M,” which won’t damage
aluminum parts. You can also use
a recycled coolant conforming to GM
Specification
1825-M with a complete coolant flush and refill. Use GM
Engine Coolant Supplement (sealer) with any complete coolant change.
If you use this mixture, you don’t need to add anything else.
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