1993 CHEVROLET LUMINA Owners Manual

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The coolant level should be at or above
the
COLD mark.
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.
Heater and radiator hoses,
L L 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.
1 NOTlCE CAUTION
If you haven’t found a problem yet, but
the coolant level isn’t at or above
COLD, add a 50/50 mixture of clean
water
(preferably distilled) and a proper
antifreeze at the coolant recovery tank.
(See the
Index under Engine Coolant
for more information about the proper
coolant mix.)
-l
A Adding only plain water to
your cooling system can be
Amgerous. Plain water, or some
~ .ler 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
I
I NOTICE
175 .

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Downloaded from www.Manualslib.com manuals search engine 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. 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 I
2. Then keep turning the pressure cap,
but
now push down as you turn it.
Remove the pressure cap.
11
3. After the lengine cools, open the
coolant
air bleed valve or valves.
2.2L L4 (VIN CODE 4): There is
only one bleed valve. It
is located on
the coolant outlet adapter.

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Problems on the Road
Engine Overheating (CONTJ
3.1L V6 (VIN CODE T or W): There
are two bleed valves. They are located
on the thermostat housing and the
thermostat bypass tube. 3.4L V6 (VIN CODE X): There are
two bleed valves. They are located
on
the thermostat housing and the
heater inlet pipe.
I
4. Fill the radiator with the proper mix,
up to the base of the filler neck.
If you see a stream of coolant coming
from an air bleed valve, close the
valve. Otherwise, close the valve(s)
after the radiator is filled.
5. Rinse or wipe any spilled coolant
from the engine and compartment.
I78

Downloaded from www.Manualslib.com manuals search engine 6. Then fill the coolant recovery tank to
the
COLD mark.
7. Put the cap back on the coolant
recovery tank, but leave the radiator
pressure cap off. 8. Start the engine and let it run until
you can feel the upper radiator hose
getting hot. Watch out for the engine
fans.
9. 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 through the filler neck
until the level reaches the base of the
filler neck.

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Engine Overheating (CONT.)
10. Then replace the pressure cap. Be
sure the arrows on the pressure cap
line up like this.
1 1. Check the coolant recovery tank.
The coolant level should be at
HOT
when the engine is hot and at
COLD when the engine is cold.
- i: .:-
Ifa Tire Goes Flat
It’s unusual for a tire to “blow OU~,)
while you’re driving, especially if you
maintain your tires properly. If air goes
out of a tire, it’s much more likely to
leak out slowly. But
if you should ever
have a “blowout,” here are a few tips
about what to expect and what to do:
If a front tire fails, the flat tire will
create a drag that pulls the vehicle
toward that side. Take your foot
off the
accelerator pedal and grip the steering
wheel firmly. Steer to maintain lane
position, then gently brake to a stop
well out of the traffic lane.
A rear blowout, particularly on a curve,
acts much like a
skid and may require
the same correction you’d use in a
skid.
In any rear blowout, remove your foot
from the accelerator pedal. Get the
vehicle under control by steering the
way you want the vehicle to go. It may
be very bumpy and noisy, but you can
still steer. Gently brake to a stop, well
off the road if possible.
If your tire goes flat, the next section
shows how
to use your jacking
equipment to change a
flat tire safely.

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Changing a FIaf Tire
If a tire goes flat, avoid further tire and
wheel damage by driving slowly to
a
level place. Turn on your hazard
warning flashers.
I
CAUTION I
A
Changing a tire can cause an
injury. The vehicle can slip
off the jack and roll over you or
other people.
You and they could
be badly injured. Find a level place
to change your tire. To help prevent
the vehicle from moving:
(Continued)
(Continued)
f 1. Set the parking brake firmly.
2. Put the shift lever in P (Park).
3. Shift a manual transaxle to
1 (First) or R (Reverse).
4. Turn off the engine.
To be even more certain the vehicle
won't move, you can put chocks at
the front and rear
of the tire farthest
away from the one being changed.
That would be the tire on the other
side
of the vehicle, at the opposite
end. The following steps will tell
you how
to
use the jack and change a tire.
The equipment you'll need is in the
trunk.
1. Pull the carpeting from the floor of
the trunk.
2. Turn the center retainer bolt on the
compact spare tire housing
countercloclnvise to remove it, then
lift the tire cover.
r

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Changing a Flat Tire (CONT.)
3. Turn the wheel wrench retainer nut
located under the tire cover
counterclockwise to remove the
wheel wrench. 4. Remove the wing nut securing the
compact spare tire and spacer by
turning it counterclockwise. Then lift
off the spacer and remove the spare
tire.
5. Remove the bolt securing the jack by
turning it countercloclnvise. Then
remove the jack.
6. If there is a wheel cover, remove it by
using the flat end
of the wheel
wrench.
Pry along the edge of the
wheel cover until it comes
off. Be
careful; the rim edges may be sharp.
Don’t
try to remove it with your bare
hands.