engine coolant CHEVROLET CORVETTE 1994 4.G User Guide

Downloaded from www.Manualslib.com manuals search engine Check Gauges Light
This light will come on briefly when you are starting
the engine. If the light comes
on and stays on while you are driving,
check your gauges to see if they are in
the warning areas.
This light can come on for:
high oil temperature or low oil
pressure
high coolant temperature
high or low battery voltage
low fuel level
LOW
OIL
L
Low Oil Light
This light should come on while you are
starting your engine. If
the light doesn’t
come on, have it repaired.
If the light
comes on while starting your engine and
stays on, your engine oil level may be too
low. You may need to add oil. See
“Engine Oil” in the Index.
LOW
COOLANT
Low Coolant Light
This light comes on when the coolant in
the system is low. You may need to add
coolant. See “Engine Coolant” in the
Index.
NOTICE:
Driving with the “LOW COOLANT”
light on could cause your Corvette to
overheat. See “Engine Overheating”
in the Index. Your Corvette could be
damaged, and it wouldn’t be covered
by your warranty.
93 ...

Downloaded from www.Manualslib.com manuals search engine Heating
The heater works best if you keep your
windows closed while using it.
1. Press yri .
2. Press #A .
3. Slide the temperature control lever to
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. a comfortable setting.
Bi-Level
You may want
to use bi-level on cool, but
sunny days. This setting directs outside
air through the instrument panel vents and
the heater ducts.
1. Press $2 .
2. Press #A .
3. Slide the temperature control lever to
a comfortable setting.
Ventilation
For mild outside temperatures, when little
heating or cooling is needed, you can still
direct outside air through your vehicle.
I. Press .
2. Press SA.
3. Slide the temperature control lever to
a comfortable setting.
Defogging and Defrosting
Windows
Your vehicle has several settings for
Aearing your windows. The air
Zonditioner compressor will
run to help
remove moisture from the air.
To defrost the windshield quickly:
I. Press p .
2. Press SA.
3. Slide the temperature control lever all
the way to the right.
To warm passengers while keeping the
windshield clear:
1. Press wd and at the same time.
2. Press SA.
3. Slide the temperature control lever to
To defrost the side windows quickly:
I. Press .
2. Press SA.
3. Slide the temperature control lever all
a
comfortable setting.
the way to the right.
Cooling
The air conditioner works best if you keep
your windows closed. On very hot days,
,pen the windows just long enou,gh for
:he hot air to escape.
I. Press A*J .
2. Press SA.
3. Slide the temperature control lever to
a comfortable setting.
107. I

Downloaded from www.Manualslib.com manuals search engine This delay helps prevent a false reading.
If vehicle speed remains above
25 mph
(40 kmh) or the temperature goes down,
the display is updated immediately.
If your vehicle has been
off for more than
three hours, the current outside
temperature will be stored
in the system
when you start the vehicle.
Inside Temperature: This sensor is in the
center air outlet on the passenger side.
If you block or cover either interior
sensor, the system will give a false
reading.
Automatic Control
The system will adjust to maintain the
temperature you set. It will select the best
fan speed and air flow setting to keep you
comfortable with the least amount of
noise.
1. Press the arrows on the “TEMP SET”
switch to set a comfortable
temperature.
2. Press “AUTO.”
The fan speed will adjust automatically unless you press
the arrows on the switch.
Manual Heating
The heater works best if you keep your
windows closed while using it.
1. Press the arrows on the “TEMP SET”
switch to set a comfortable
temperature.
2. Press uj .
3. Press the arrows on the fan speed
switch if you don’t like the automatic
setting. In “AUTO
# ” 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 OF (-1 8 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.
Manual Bi-Level
Bi-level can heat or cool outside air and
direct it in two directions.
1. Press the arrows on the “TEMP SET”
switch to set a comfortable
temperature.
2. Press 3 .
3. Press the arrows on the fan speed
switch if
you don’t like the automatic
setting.
Manual Ventilation
For mild outside temperatures, when little
heating or cooling is needed, you can still
direct outside
air through your vehicle.
1. 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.
2. Press dJ .
3. Press the arrows on the fan speed
switch if you don’t like the automatic
setting.
Manual Cooling
The air conditioner works best if you keep
your windows closed. On very hat days,
open the windows just long enough for
the hot air to escape.
1. Press the arrows on the “TEMP SET”
switch to set a comfortable
temperature.
2. Press a. After cool-down, adjust
the air flow to another setting. The
compressor works in all settings
109 ...

Downloaded from www.Manualslib.com manuals search engine 0
0
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.
As you go over the top of a hill, be
alert. There could be something in
your lane, like
a stalled car or an
accident.
You may see highway signs on
mountains
that warn of special
problems. Examples are long grades,
passing or no-passing zones, a falling
rocks area, or winding roads. Be alert
to these and take appropriate action.
0
0
Winter Driving
Here are some tips for winter driving:
Have your Corvette in good shape for
winter. Be sure your engine coolant
mix
is correct.
You may want to put winter
emergency supplies in your vehicle.
I ,,;;. &_ $*>;.$ , x; ':. . , ;"!d i
Include an ice scraper, a small brush or
broom, a supply of windshield washer
fluid, a rag, some winter outer clothing, a
small shovel, a flashlight, a red cloth, and
a couple
of reflective warning triangles.
And,
if you will be driving under severe
conditions, include a small bag
of sand, a
piece of old carpet or a couple
of burlap
bags to help provide traction. Be sure you
properly secure these items
in your
vehicle.
137 ...

Downloaded from www.Manualslib.com manuals search engine Problems on the Road
NOTICE:
Towing a vehicle over rough surfaces
could damage a vehicle. Damage
can occur from vehicle-to-ground
or vehicle-to-wheel-lift-equipment.
To help avoid damage, install a
towing dolly and raise vehicle until
adequate clearance
is obtained
between the ground and/or wheel-lift
equipment. Attach
a separate safety chain around the
outboard end of each lower control
arm.
NOTICE:
Do not allow chains to contact
spring, as damage to spring could
result.
Engine Overheating
You will find a engine coolant
temperature gauge on the instrument
cluster and a low coolant light on the
Driver Information Center.
If Steam Is Corning from Your Engine:
. . .I50

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.
If No Steam Is Coming from Your
Engine:
If you get the overheat warning but see 01
hear no steam, the problem may not be
too serious. Sometimes the engine can ge
a little too hot when you:
0 Climb a long hill on a hot day.
0 Stop after high speed driving.
0 Idle for long periods in traffic.
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. Turn on your heater to full hot at the
highest fan speed and open the
window as necessary.
(Neutral).
3. If you’re in a traffic jam, shift to “N’
[f you no longer have the overheat
warning, you can drive. Just to be safe,
hive slower for about ten minutes. If the
warning doesn’t come back on, you can
drive normally.
[f the warning continues, pull over, stop,
and park your vehicle right away.
[f there’s still no sign of steam, you can
idle the engine for two or three minutes
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.
You may decide not to lift the hood but to
get service help right away.
Cooling System
When you decide it’s safe to lift the hood,
here’s what you’ll see on the LTl engine:
1. Coolant recovery tank
2. Coolant high fill reservoir with
3. Electric engine fans
pressure cap
151 ...

Downloaded from www.Manualslib.com manuals search engine Problems on the Road
F
Cooling System
When you decide it’s safe to lift the hood,
here’s what you’ll see on the
LT5 engine:
1. Coolant recovery tank
2. Coolant high fill reservoir with
3. Electric engine fans
pressure cap
. . -152
If
the coolant inside the coolant recovery
tank is boiling, don’t do anything else
until it cools down.
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.
I NOTICE:
I
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.

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
50150 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.)
NOTICE:
I
In cold weather, water can freeze and
crack
the engine, radiator, heater core
and other parts. Use the recom-
mended coolant.
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.
153 ...

Downloaded from www.Manualslib.com manuals search engine Problems on the Road
How to Add Coolant to the Coolant
High
Fill Reservoir - LT1 Only
NOTICE:
I
The LT1 engine (Code P) 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 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.
. . .I54

Downloaded from www.Manualslib.com manuals search engine Problems on the Road
4.
5.
6.
7.
8.
Fill with the proper mix. Add coolant
until you see a steady stream of
coolant coming from the bleed valves.
Close the bleed valves.
Continue to fill the coolant high fill
reservoir up to the base of the filler
neck.
Rinse or wipe the spilled coolant from
the engine and compartment.
Start the engine and allow it to run in
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.
9. Shut the engine off and replace the
pressure cap. Be sure the arrows on
the pressure cap line up like this. 10. Then fill the coolant recovery tank
For a complete drain, flush and refill,
see your Chevrolet dealer or a Chevrolet
Corvette Service Manual.
To purchase a
service manual, see “Service
Publications’’ in the Index. to
the proper level.
. . .156