Page 205 of 339

When you decide it’s safe to lift the
hood, here’s what you’ll see:
1. Coolant Recovery Tank
2. Radiator Pressure Cap
3. Electric Engine Fan
A An electric fan under the
hood can start up even when
thL @ne is not running and can
injure you. Keep hands, clothing
and tools away from any
underhood electric fan.
Don’t reach through the grille to
release the underhood lever.
- II E I L
If the coolant inside the coolant recovery
tank
is boiling, don’t do anything else
until it cools down.
The coolant level should be at
or above
FULL. 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.
unu I lVlV
Heater and radiator hoses,
1 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.
203 =
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Problems on the Road
c
Engine damage from running yollr I
engine without coolant isn’t
covered by your warranty.
I
If there seems to be no leak, check to
see if the electric engine fan
is running.
If
the engine is overheating, the fan
should be running. If it isn’t, your
vehicle needs service.
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
FULL, add a 50/50 mixture of clean
water
(preferably distilled) and the
proper antifreeze at the coolant recovery
tank. (See “Engine Coolant”
in the
Index for more information about the
proper coolant mix.)
A Adding only plain water to
L 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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Page 209 of 339
4. Then fill the coolant recovery tank to
the
FULL mark.
5. Put the cap back on the coolant
recovery tank, but leave the radiator
pressure cap
off.
6. Start the engine and let it run until
you can feel the upper radiator hose
getting
hot. Watch out for the engine
fan.
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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Page 223 of 339

Part 6
Here you wit1 find information
about the care of your Geo
. This
part begins with service and fuel
information. and then it shows
how to check important fluid and
lubricant levels
. There is also
technical information about your
vehicle. and
a section devoted to
its appearance care
.
ii iervice & Appearance Care
Service ............................................................. 222
Fuel ............................................................... 223
Checking Things under the Hood ........................................ 227 .
HoodRelease 227
Engineoil ........................................................ 229
Aircleaner ........................................................ 233
Automatic Transmission Fluid ........................................ 234
Manual Transmission Fluid ........................................... 237
Clutch Adjustment .................................................. 238
RearAxle ......................................................... 238
Four-WheelDrive .................................................. 239
Enginecoolant ..................................................... 240
Power Steering Fluid ................................................ 243
Windshield Washer Fluid ............................................ 244
Brake Master Cylinder ............................................... 245
Battery ........................................................... 247
Bulb Replacement .................................................... 248
LoadingYourVehicle ................................................. 252
Tires ............................................................... 253
Appearancecare ..................................................... 261
Appearance Care and Maintenance Materials .............................. 271
Vehicle Identification Number .......................................... 272
Service Parts Identification Label ........................................ 272
Add-on Electrical Equipment ........................................... 272
Fuses and Circuit Breakers ............................................. 273
ReplacementBulbs ................................................... 276
Capacities and Specifications ........................................... 277
221 .
.
......................................................
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Page 242 of 339

Service & Appearance Care
How to Check Lubricant:
If the level is below the bottom of the
filler plug hole, you’ll need to add some
lubricant.
If the differential is at operating
temperature (warm), add enough
lubricant to raise the level to the bottom
of the filler plug hole.
If the differential
is cold, add enough
lubricant to raise the level to
1/2 inch
(12 mm) below the filler plug hole.
What to Use:
Refer to the Maintenance Schedule to
determine what kind of lubricant to use.
See “Recommended Fluids and
Lubricants” in the Index.
Engine Coolant
The following explains your cooling
system and how to add coolant when it
is low. If you have a problem with
engine overheating, see “Engine
Overheating” in the Index.
The proper coolant for your Geo will:
Give freezing protection down to
Give boiling protection up to 258°F
Protect against rust and corrosion.
Help keep the proper engine
Let the warning lights work as they
-34°F (-37°C).
(125°C).
temperature. should.
What to Use:
Use a mixture of one-half clean water
(preferably distilled) and one-half
antifreeze or approved recycled coolant
that meets “GM Specification 6038M,”
which won’t damage aluminum parts.
Also use GM Engine Coolant
Supplement (sealer) with a complete
coolant change. If you use these, you
don’t need to add anything else.
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Page 243 of 339
r
Adding only plain water to
b your cooling system can be
dmgemus. Plaia 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
antifreeve or approved recycled
coolant.
I
Some conditions, such as air trapped in
the cooling system, can affect the
coolant level in the radiator. Check the
coolant level when the engine is cold
and follow the steps under ‘‘Adding Coolant” for
the proper way to add
coolant. If you have to add coolant
more than
four time
a year, have your dealer check
your cooling system.
If
you use the proper coolant, you
don’t have to add extra inhibitors
or additivies which claim to
II
241
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Page 244 of 339
Service & Appearance Care
Adding Coolant
To Check Coolant: When your engine
is cold, the coolant level should be
LOW, or a little higher. When your
engine is warm, the level should be up
to
FULL, or a little higher.
To Add Coolant: If you need more
coolant, add the proper mix
at the
coolant recovery tank.
r Turning the radiator pressure
radiator are hot can allow steam
and scalding liquids to blow out
and burn you badly. With the
coolant recovery tank, you will
almost never have to add coolant
at the radiator. Never turn the
radiator pressure cap
- even a
little
- when the engine and
radiator are hot.
cap
when the engine and Add
coolant
mix at the recovery tank,
but be careful not to spill
it.
, You can be burned if you
- L 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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Page 245 of 339
Radiator Pressure Cap
IVU I IIJt
Your radiator pressure cap is a 13
- i (90 kPa) pressure-type cap and
must be tightly installed to prevent
coolant
loss and possible engine
damage from overheating. Be sure
the arrows on the cap line up with
the overflow tube on the radiato
filler neck.
I
When you replace your radiator pressure
cap, an
AC* cap is recommended.
Thermostat
Engine coolant temperature is controlled
by a thermostat in the engine coolant
system. The thermostat stops the flow
of
coolant through the radiator until the
coolant reaches a preset temperature.
When you replace your thermostat, an
AC@ thermostat is recommended.
Power Steering Fluid
How to Check Power Steering Fluid:
Unscrew the cap and wipe the dipstick
with a clean rag. Replace the cap and
completely tighten it. Then remove the
cap again and look at the fluid level on
the dipstick.
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