radiator cap CHEVROLET OPTRA 5 2007 1.G Owners Manual

Checking Coolant
The engine coolant surge tank is located in the rear
of the engine compartment on the driver’s side of
the vehicle. SeeEngine Compartment Overview on
page 258for more information on location.
{CAUTION:
Turning the surge tank pressure cap when
the engine and radiator are hot can allow
steam and scalding liquids to blow out
and burn you badly. Never turn the surge
tank pressure cap — even a little — when
the engine and radiator are hot.
To check the engine coolant, the vehicle must be
on a level surface. When your engine is cold,
the coolant level should be between the
Maximum (A) and Minimum (B) marks on the
coolant surge tank. The level rises at engine
operation temperature and drops again when the
engine cools down.
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{CAUTION:
An electric engine cooling fan under the
hood can start up even when the engine
is not running and can injure you. Keep
hands, clothing, and tools away from any
underhood electric fan.
If the coolant inside the coolant surge tank is
boiling, do not do anything else until it cools down.
The vehicle should be parked on a level surface.
Make sure that the air conditioning is turned off.
The coolant level should be between the Minimum
and Maximum marks on the coolant surge tank
when the engine is cool. If it is not, 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. Do not
touch them. If you do, you can be burned.
Do not run the engine if there is a leak.
If you run the engine, it could lose all
coolant. That could cause an engine re,
and you could be burned. Get any leak
xed before you drive the vehicle.
If there seems to be no leak, with the engine on,
check to see if the electric engine cooling fan
is running. If the engine is overheating, the
fan should be running. If it is not, your vehicle
needs service.
Notice:Engine damage from running your
engine without coolant is not covered by your
warranty.
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1. You can remove the coolant surge tank
pressure cap when the cooling system,
including the coolant surge tank pressure cap
and upper radiator hose, is no longer hot.
Turn the pressure cap slowly counterclockwise
about two or two and one-half turns.
If you hear a hiss, wait for that to stop.
This will allow any pressure still left to be
vented out the discharge hose.
2. Then keep turning the pressure cap slowly,
and remove it.
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3. Fill the coolant surge tank with the proper
mixture to the Maximum mark on the
coolant surge tank. Wait about five minutes,
then check to see if the level is below the
mark. If the level is below the Maximum mark,
add additional coolant to bring the level up
to the mark. Repeat this procedure until
the level remains constant at the Maximum
mark for at least five minutes.4. With the coolant surge tank pressure cap off,
start the engine and let it run until you can
feel the upper radiator hose getting hot.
Watch out for the engine cooling fan.
By this time, the coolant level inside the
coolant surge tank may be lower. If the level
is lower than the Maximum mark, add
more of the proper mixture to the coolant
surge tank until the level reaches the mark.
5. Then replace the pressure cap. Be sure the
pressure cap is hand-tight and fully seated.
See your dealer, if necessary.
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93,000 Miles (155 000 km)
❑Change engine oil and filter and replace engine
oil pan drain plug washer (or every 3 months,
whichever occurs first).An Emission Control
Service.
96,000 Miles (160 000 km)
❑Change engine oil and filter and replace engine
oil pan drain plug washer (or every 3 months,
whichever occurs first).An Emission Control
Service.
❑Rotate tires. SeeTire Inspection and Rotation
on page 316for proper rotation pattern and
additional information.(See footnote +.)
99,000 Miles (165 000 km)
❑Change engine oil and filter and replace engine
oil pan drain plug washer (or every 3 months,
whichever occurs first).An Emission Control
Service.
150,000 Miles (240 000 km)
❑Drain, flush, and refill cooling system. This
service can be complex; you should have
your dealer perform this service. SeeEngine
Coolant on page 268for what to use. Inspect
hoses. Clean radiator, condenser, pressure cap,
and neck. Pressure test the cooling system
and pressure cap.An Emission Control Service.
368

❑Rotate tires. SeeTire Inspection and Rotation
on page 316for proper rotation pattern and
additional information.(See footnote +.)
❑Replace spark plugs.An Emission Control
Service.
❑Replace fuel filter.An Emission Control
Service. (See footnote †.)
❑Inspect drive belt(s).
❑Inspect timing belt.
❑Inspect EVAP canister, vapor lines and EVAP
vent solenoid valve.An Emission Control
Service. (See footnote †.)
❑Inspect PCV system.An Emission Control
Service. (See footnote †.)
❑Change brake/clutch fluid (or every 24 months,
whichever occurs first).97,500 Miles (162 500 km)
❑Change engine oil and filter and replace engine
oil pan drain plug washer (or every 12 months,
whichever occurs first).An Emission Control
Service.
❑Rotate tires. SeeTire Inspection and Rotation
on page 316for proper rotation pattern and
additional information.(See footnote +.)
150,000 Miles (240 000 km)
❑Drain, flush, and refill cooling system. This
service can be complex; you should have
your dealer perform this service. SeeEngine
Coolant on page 268for what to use. Inspect
hoses. Clean radiator, condenser, pressure cap,
and neck. Pressure test the cooling system
and pressure cap.An Emission Control Service.
373

Engine Cooling System Inspection
Inspect the hoses and have them replaced if
they are cracked, swollen or deteriorated. Inspect
all pipes, fittings and clamps; replace as needed.
Clean the outside of the radiator and air
conditioning condenser. To help ensure proper
operation, a pressure test of the cooling system
and pressure cap is recommended at least once
a year.
Throttle System Inspection
Inspect the throttle system for interference or
binding, and for damaged or missing parts.
Replace parts as needed. Replace any
components that have high effort or excessive
wear. Do not lubricate accelerator and cruise
control cables.
Brake System Inspection
Inspect the complete system. Inspect brake lines
and hoses for proper hook-up, binding, leaks,
cracks, chafing, etc. Inspect disc brake pads for
wear and rotors for surface condition. Inspect other
brake parts, including calipers, parking brake,
etc. You may need to have your brakes inspected
more often if your driving habits or conditions
result in frequent braking.
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