2002 CHEVROLET MONTE CARLO engine

5-14
If the coolant inside the coolant recovery tank is boiling,
don't do anything else until it cools down. The vehicle
should be parked on a level surface.
The coolant level should be at or above the COLD mark
on the coolant recovery tank. To check the coolant level,
look for the COLD mark on the side of the coolant
recovery tank that faces the engine. Check to make sure
that the coolant level is up to the COLD fill level on the
side of the coolant recovery tank. If it isn't, you may
have a leak at the pressure cap or in the radiator hoses,
heater hoses, radiator, water pump or somewhere else in
the cooling system.
CAUTION:
Heater and radiator hoses, 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.
If there seems to be no leak, with the engine on,
check to see if the electric engine cooling fans are
running. If the engine is overheating, both fans should
be running. If they aren't, your vehicle needs service.
NOTICE:
Engine damage from running your engine
without coolant isn't covered by your warranty.
See ªOverheated Engine Protection Operating
Modeº in the Index.

5-15
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.
How to Add Coolant to the Coolant
Recovery Tank
If you haven't found a problem yet, but the coolant level
isn't at the COLD mark, add a 50/50 mixture of clean,
drinkable water and DEX
-COOL
engine coolant at
the coolant recovery tank. See ªEngine Coolantº in the
Index for more information.
CAUTION:
Adding only plain water to your cooling system
can be dangerous. Plain water, or some other
liquid such as 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, drinkable water
and DEX
-COOL
coolant.
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 mixture.

5-16
The coolant recovery tank is located in the engine
compartment on the passenger's side of the vehicle.
See ªEngine Compartment Overviewº in the Index
for more information on location.
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.
When the coolant in the coolant recovery tank is at 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
mixture directly to the radiator, but be sure the cooling
system is cool before you do it.

5-18 How to Add Coolant to the Radiator
NOTICE:
Your engine has a specific radiator fill procedure.
Failure to follow this procedure could cause your
engine to overheat and be severely damaged.
The radiator pressure cap is located in the front of the
engine compartment on the passenger's side of the
vehicle, near the diagonal cross brace. See ªEngine
Compartment Overviewº in the Index for more
information on location.
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.

5-19
2. Then keep turning the pressure cap, but now push
down as you turn it. Remove the pressure cap.
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.
3. If you have the 3800 V6 engine, remove the
3800 Series II V6 engine cover shield to access
the bleed valve.
A. Clean the area around the engine oil fill tube and
cap before removing. Twist the oil fill tube, with
cap attached, counterclockwise and remove it.
B. Lift the engine cover shield at the front, slide the
catch tab out of the engine bracket and remove
the cover shield.
C. Put the oil fill tube, with cap attached, in the valve
cover oil fill hole until you're ready to replace the
cover shield.

5-20
3400 V6 Bleed
Valve #13400 V6 Bleed
Valve #2
4. After the engine
cools, open the
coolant air bleed
valve or valves.
3800 V6 Bleed Valve
3400 V6 engine: There are two bleed valves.
One is located on the thermostat housing.
The other is located on the thermostat bypass tube.
3800 V6 engine: There is one bleed valve.
It is located on the thermostat housing.

5-21
5. Fill the radiator with the proper DEX-COOL

coolant mixture, up to the base of the filler neck. See
ªEngine Coolantº in the Index for more information
about the proper coolant mixture.
If you see a stream of coolant coming from an air
bleed valve, close the valve. Otherwise, close the
valves after the radiator is filled.6. Rinse or wipe any spilled coolant from the engine
and the compartment.
7. If you have the 3800 V6 engine, replace the
3800 Series II V6 engine cover shield.
A. Remove the oil fill tube, with cap attached,
from the valve cover.
B. Insert the catch tab on the cover shield under
the bracket on the engine.
C. Place the hole in the cover shield over the hole
in the valve cover. Install oil fill tube and cap by
twisting clockwise.

5-22
8. Then fill the coolant recovery tank to the
COLD mark.
9. Put the cap back on the coolant recovery tank,
but leave the radiator pressure cap off.10. Start the engine and let it run until you can feel the
upper radiator hose getting hot. Watch out for the
engine cooling fans.
11. By this time, the coolant level inside the radiator
filler neck may be 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.