1997 CHEVROLET ASTRO radiator cap

Downloaded from www.Manualslib.com manuals search engine Cooling System
When you decide it’s safe to lift the hood, here’s what
you’ll see:
A. Coolant Recovery Tank
B. Radiator Pressure Cap
C. Engine Fan
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 the ADD 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.
5-15

Downloaded from www.Manualslib.com manuals search engine JTION:
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
-0 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.
5-18

Downloaded from www.Manualslib.com manuals search engine How to Add Coolant to the radiator
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.
I
2. Then keep turning the
pressure cap, but now
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Downloaded from www.Manualslib.com manuals search engine 3. Fill the radiator with the proper DEX-COOL@
coolant mixture, up to the base of the filler neck.
4. Then fill the coolant recovery tank to the ADD mark.
5. Put the cap back on the coolant recovery tank, but
leave the radiator pressure cap off.
5-20

Downloaded from www.Manualslib.com manuals search engine 6. Start the engine and let it run until you can feel the
upper radiator hose getting hot. Watch out for the
engine fan.
7. 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.
8. 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.
5-21

Downloaded from www.Manualslib.com manuals search engine Section 6 Service and Appearance Care
Here you will find information about the care of your vehicle. This section 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 part devoted to its appearance care.
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6-3
1
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6-36
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6-36 Service
Fuel Fuels
in Foreign Countries
Filling Your Tank
Checking Things Under the Hood
Engine Oil
Engine Cover
Air Cleaner
Automatic Transmission Fluid
All-Wheel Drive Rear Axle
Engine Coolant
Radiator Pressure Cap
Thermostat Power Steering Fluid
Windshield Washer Fluid
Brakes Battery
Bulb Replacement Halogen Bulbs 6-42
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6-5
1
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6-5
8
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8
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6-68 Windshield Wiper Blade Replacement
Tires Appearance Care
Cleaning
the Inside of Your Vehicle
Cleaning Glass Surfaces
Cleaning the Outside
of the Windshield,
Backglass and Wiper Blades
Cleaning the Outside
of Your Vehicle
Cleaning Tires Finish Damage Underbody Maintenance
Chemical Paint Spotting
Appearance Care Materials Chart
Vehicle Identification Number
(VIN)
Service Parts Identification Label
Electrical System Replacement Bulbs
Capacities and Specifications
Air Conditioning Refrigerants
Normal Maintenance Replacement Parts
6-1

Downloaded from www.Manualslib.com manuals search engine Adding Coolant
If you need more coolant, add the proper DEX-COOL@
coolant mixture at the coolant recovery tank.
I
I:
A
Add coolant mix at the recovery tank, but be careful not
to spill it.
'hrning the radiator pressure cap when the
engine and 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.
I 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.
6-28

Downloaded from www.Manualslib.com manuals search engine Radiator Pressure Cap
I NOTICE:
~~
Your radiator cap is a 15 psi (105 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
radiator filler neck.
When you replace your radiator pressure cap, a GM cap
is recommended.
6-29