engine coolant CHEVROLET CORVETTE 1996 4.G User Guide

Downloaded from www.Manualslib.com manuals search engine "'"J NORMAL NC: Use for normal cooling on hot
days. This setting cools outside air and directs it through
the instrument panel vents.
The air conditioning compressor operates in NORMAL
A/C, as well as RECIRCULATE, BI-LEVEL and
DEFROST. It only works when the outside temperature
is above freezing. When the air conditioning compressor
is on, you may sometimes notice slight changes in
your vehicle's engine speed and power. This
is normal
because the system is designed to cycle the compressor
on and
off to keep the desired cooling and help
fuel economy.
+,d BI-LEVEL: This setting cools or heats outside air
and directs it through the instrument panel vents and the
floor ducts.
de
do
do /I VENT: Air flows through the instrument panel
vents. The air conditioning compressor does not run in
VENT mode.
wg HEATER: This setting directs most of the air
through the floor ducts and some of the air through the
defroster vents. The air conditioning compressor does
not run in HEATER mode.
DEFROST: This setting directs most of the
air through the windshield defroster and side window
defogger vents and some of the air through the
floor ducts.
Heating
The heater works best if you keep your windows closed
while using it.
Press HEATER and
FAN UP, then slide the temperature
control lever to a comfortable setting.
If your vehicle has an engine coolant heater and you
use it in cold weather,
0°F (- 18 "C) or lower, your
heating system can provide heat more quickly because
the engine coolant is already warmed. See "Engine
Coolant Heater" in the Index.

Downloaded from www.Manualslib.com manuals search engine Automatic Control
The system will adjust to maintain the'temperature you
set. It will select the best fan speed and aifflow setting to
keep you comfortable with the least amount of noise.
Press the arrows on the TEMP SET switch to set a
comfortable temperature. Then press AUTO and the fan
speed will adjust automatically unless you press the
arrows on the AUTO switch.
Manual Heating
The heater works best if you keep your windows closed
while using it.
Press the arrows on the TEMP SET switch to set a
comfortable temperature. Then press HEATER and, if
you don't like the automatic setting, press the arrows on
the fan speed switch. In AUTO FAN on cold days, the
fan will stay
off until the coolant warms up enough to
heat your vehicle.
If your vehicle has an engine coolant heater and you use
it in cold weather,
0 "F (- 18 O C) or lower, your heating
system can provide heat more quickly because the engine
coolant is already warmed. See "Engine Coolant Heater"
in the Index.
1
Manual Bi-Level
BI-LEVEL can heat or cool outside air and direct it in
two directions.
Press the arrows on the TEMP SET switch to set a
comfortable temperature. Press BI-LEVEL and, if you
don't like the automatic setting, press the arrows on the
fan speed switch.
Manual Ventilation
For mild outside temperatures, when little heating or
cooling
is needed, you can still direct outside air through
your vehicle.
Press the arrows on the TEMP SET switch to set a
comfortable temperature. For ventilation, the system
can't cool the vehicle below the outside temperature.
Press VENT and, if you don't like the automatic setting,
press the arrows on the fan speed switch.
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Downloaded from www.Manualslib.com manuals search engine Engine Overheating
You will find an engine coolant temperature gauge on
the instrument cluster and a
LOW COOLANT light on
the Driver Information Center.
If Steam Is Coming From Your Engine
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
opening 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.

Downloaded from www.Manualslib.com manuals search engine When you decide it’s safe to lift the hood, here’s what
you’ll see:
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.
1. Coolant Recovery Tank
2. Coolant High Fill Reservoir with Pressure Cap
3. Electric Engine Fans
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Downloaded from www.Manualslib.com manuals search engine When it is cool, remove the coolant recovery tank cap
and look at the dipstick.
The coolant level should be at or above
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.
.h CAUTION:
*
8’
Heater and radiator hoses, and other engine
parts, can be very
hot. Don’t touch them. If you
do, you can be bul‘ned.
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.
I NOTICE:
I
Engine damage from running your engine
without coolant isn’t covered by your warranty.
I
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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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 the COLD mark, add a 50/50 mixture
of
clean water (preferably distilled) and DEX-COOL“
(orange-colored, silicate-free) antifreeze at the coolant
recovery tank. (See “Engine Coolant” in the Index
for more information.)
-
A CAUTION:
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 TM antifreeze.
NOTICE:
In cold weather, water can freeze and crack the
engine, radiator, heater core and other parts.
Use the recommended coolant and the proper
coolant mix.
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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.
I
When the coolant in the coolant recovery tank is at or
above the
COLD mark, 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 coolant high fill reservoir, but be sure the
cooling system is cool before
you do it.
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 high
fill reservoir pressure
cap -- even a little -- they
CAUTION: (Continued) can
come out
at high speed. Never turn the cap
when the cooling system, including the coolant
high fill reservoir pressure cap,
is hot. Wait for the
cooling system and coolant high fill reservoir
pressure cap to cool
if you ever have to turn the
I pressure cap.
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Downloaded from www.Manualslib.com manuals search engine How to Add Coolant to the C
Fill Reservoir mt
H
I NOTICE:
Your engine has a specific coolant high fill
reservoir
fill procedure. Failure to follow this
procedure could cause your engine
to overheat
and be severely damaged.
1. You can remove the coolant high fill reservoir
pressure cap when the cooling system, including the
coolant high
fill reservoir 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.
2. Then keep turning the pressure cap, but now push
down
as you turn it. Remove 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.
I
3. After the engine cools, open the air bleed valve on
the water pump inlet.
4. Fill with the proper mix. Add coolant until you see
a steady stream
of coolant coming from the
bleed valve.
5. Close the bleed valve.
6. Continue to fill the coolant high fill reservoir up to
the base
of the filler neck.
7. Rinse or wipe the spilled coolant from the engine
compartment.
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Downloaded from www.Manualslib.com manuals search engine 8. Start the engine and allow it to idle for approximately
four minutes. By
this time, the coolant level inside the
coolant high fill reservoir will be lower. Add more of
the proper mix through the filler neck until the level
reaches the base of the filler neck.
I
9. Shut the engine off and replace the pressure cap. Be
sure the arrows on the cap line up like this.
10. Then fill the coolant recovery tank to the proper level.
For a complete drain, flush and refill, see your Chevrolet
dealer or
a Chevrolet Corvette Service Manual. To
purchase a service manual, see “Service and Owner
Publications’’ in
the Index.
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