cooling PONTIAC FIREBIRD 1998 User Guide

When the coolant in the coolant recovery tank is at
FULL COLD start your vehicle.
If the overheat
warning continues, there's one more
thing you can try. You can add the proper coolant
mixture directly to
the radiator but be sure the cooling
system
is cool before you do it.
'
A CAUTION:
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.
F
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 radiator
pressure cap
-- even a little -- they can come out
at high speed. Never turn the cap when the
cooling system, including the radiator pressure
cap, is hot. Wait for the cooling system and
radiator pressure cap
to cool if you ever have to
turn the pressure cap.
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1
How to Add Coolant to the Radiator
(3800 V6 Engine)
I NOTICE:
Your engine has a specific radiator fill procedure.
Failure to follow this procedure could cause your
engine to overheat and be severely damaged.
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 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.
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5. Then fill the coolant recovery tank to FULL COLD.
6. Put the cap back on the coolant recovery tank, but
leave the radiator pressure cap off.
I
7.
8.
Start the engine and let it run until you can feel the
upper radiator hose getting hot. Watch out for
the
engine cooling fans.
By
this time, the coolant level inside the filler neck may
he lower. If the level is lower, add more of the proper
DEX-COOL@ coolant mixture through the filler neck
until the level reaches the base of the filler neck.
r
9. Then replace the pressure cap. At any time during
this procedure
if coolant begins to flow out of the
filler neck, reinstall the pressure cap. Be sure the
arrows on the pressure cap line up like this.

How to Add Coolant to the Radiator
(VS Engine Only)
NOTICE:
The LS1 Engine (Code G) has a specific radiator
fill procedure. Failure
to follow this procedure
could cause your engine
to overheat and be
severely damaged.
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 (counterclockwise)
until it fist 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.
5-24

When you open the hood of the 3800 V6 engine you’ll see:
F a
A. Engine Coolant Reservoir
B. Battery
C. Radiator Cap
D. Oil Fill Cap
E. Automatic Transmission
Dipstick (If Equipped)
E Windshield Washer Reservoir
G. Engine Cooling Fan
H. Air Filter
I. Power Steering Reservoir
J. Engine Oil Dipstick
IS. Brake Fluid Reservoir
L. Clutch fluid Reservoir
(If Equipped)
6-10

When you open the hood of the 5.7L V8 engine you’ll see:
A. Engine Coolant Reservoir
B. Battery
C. Engine Oil Dipstick
D. Engine Oil Fill Cap
E. Windshield Washer Reservoir F.
Engine Cooling Fan
G. Automatic Transmission
Dipstick
(If Equipped)
H. Air Filter
I. Power Steering Reservoir
J. Brake Fluid Reservoir
K. Clutch Fluid Reservoir
(If Equipped)

How to Check Limited-Slip Differential
The proper fluid should be added if the level is below
the
STEP mark on the reservoir. See the instructions on
the reservoir cap.
Rear Axle
When to Check and Change Lubricant
Refer to the Maintenance Schedule to determine how
often to check the lubricant and when to change it. See
“Scheduled Maintenance Services” in the Index.
How to Check Lubricant
If the level is below the bottom of the filler plug hole,
you’ll need to add some lubricant. Add enough lubricant
to raise the level to the bottom of the filler plug hole.
What to Use
Standard Differential
Use SAE 75W-90 Synthetic Gear Lubricant (GM Part
No. 12378261) or equivalent meeting GM
Specification
9986 1 15.
To add lubricant when the level is low, use SAE 75W-90
Synthetic Gear Lubricant (GM Part No. 12378261) or
equivalent meeting
GM Specification 99861 15. To
completely refill after draining, add
4 ounces (1 18 ml)
of Limited-Slip Differential Lubricant Additive (GM
Part No. 1052358) or equivalent. Then fill to the bottom
of the filler plug hole with Synthetic Gear Lubricant.
Engine Coolant
The cooling s stem in your vehicle is filled with
DEX-COOL
8 engine coolant. This coolant is designed
to remain in your vehicle for
5 years or 150,000 miles
(240
000 kmb whichever occurs first, if you add only
DEX-COOL extended life coolant.
The following explains your cooling system and
how
to add coolant when it is low. If you have a problem
with engine overheating or if you need to add coolant to
your radiator, see “Engine Overheating” in the Index.
6-27

A 50/50 mixture of water and DEX-COOL@
coolant will:
0 Give freezing protection down to -34°F (-37°C).
0 Give boiling protection up to 265 “F (1 29°C).
Protect against rust and corrosion.
Help keep the proper engine temperature.
Let the warning lights and gages work as
they should.
NOTICE:
When adding coolant, it is important that you
use only DEX-COOL@ (silicate-free) coolant.
If coolant other than DEX-COOL is added to
the system, premature engine, heater core or
radiator corrosion may result.
In addition, the
engine coolant
will require change sooner -- at
30,000 miles (50 000 km) or 24 months,
whichever occurs first. Damage caused by the
use of coolant other than DEX-COOL@
is not
covered by your new vehicle warranty.
What to Use
Use a mixture of one-half clean water (preferably
distilled) and one-half
DEX-COOL@ coolant which
won’t damage aluminum parts. If you use this mixture,
you don’t need to add anything else.
I 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 mixture will. Your vehicle’s coolant
warning system is set
for the proper coolant
mixture. With plain water or the wrong mixture,
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 mixture of clean water and
DEX-COOL@ coolant.
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NOTICE:
If you use an improper coolant mixture, your
engine could overheat and be badly damaged.
The repair cost wouldn’t be covered by your
warranty.
Too much water in the mixture can
freeze and crack the engine, radiator, heater
core and other parts.
If you have to add coolant more than four times a year,
have your dealer check your cooling system.
I NOTICE:
If you use the proper coolant, you don’t have to
add extra inhibitors or additives which claim to
improve the system. These can be harmful.
Checking Coolant
When your engine is cold, check the dipstick on the cap
of the coolant recovery tank. The coolant level should
be at
COLD, or a little higher. When your engine is
warm, the level on the dipstick should be up to HOT, or
a little higher.
6-29

Used Replacement Wheels
Using the wrong replacement wheels, wheel
bolts or wheel nuts on your vehicle can be
dangerous.
It could affect the braking and
handling
of your vehicle, make your tires lose
air and make you lose control. You could have
a collision in which you or others could be
injured.
Always use the correct wheel, wheel
bolts and wheel nuts for replacement.
I NOTICE:
~
The wrong wheel can also cause problems with
bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper
height, vehicle ground clearance and tire or
tire chain clearance to the body and chassis.
See “Changing a Flat Tire” in the Index for
more information.
Putting a used wheel on your vehicle is
dangerous. You can’t know how it’s been used or
how far it’s been driven. It could fail suddenly
and cause an accident.
If you have to replace a
wheel, use
a new GM original equipment wheel.
Tire Chains
I NOTICE:
If your vehicle has P235/55R16, P245/50ZR16 or
P275/40ZR17 size tires, don’t use tire chains.
They can damage your vehicle because there’s
not enough clearance.
NOTICE: (Continued)
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