engine Oldsmobile Aurora 1998 s Manual PDF

If your vehicle is certified to meet California Emission
Standards (indicated on the underhood emission control
label), it is designed to operate
on fuels that meet
California specifications.
If such fuels are not available
in states adopting California emissions standards, your
vehicle will operate satisfactorily on fuels meeting
federal specifications, but emission control system
performance may be affected. The malfunction indicator
lamp on your instrument panel may turn on and/or your
vehicle may fail a smog-check test. If this occurs, return
to your authorized Aurora retailer for diagnosis to
determine the cause of failure. In the event
it is
determined that the cause of the condition is the type of
fuels used, repairs may not be covered by your warranty.
Some gasolines that are not reformulated for low
emissions contain an octane-enhancing additive called
methylcyclopentadienyl manganese tricarbonyl (MMT); ask your service station operator whether or not his fuel
contains MMT. General Motors does not recommend the
use of such gasolines.
If fuels containing MMT are used,
spark plug life may be reduced and your emission
control system performance may
be affected. The
malfunction indicator lamp on your instrument panel
may turn on.
If this occurs, return to your authorized
Aurora retailer for service. To
provide cleaner air, all gasolines in the United States
are now required
to contain additives that will help
prevent deposits from forming in your engine and
fuel system, allowing your emission control system
to
function properly. Therefore, you should not have to
add anything to the fuel. In addition, gasolines
.
containing oxygenates, such as ethers and ethanol, and
reformulated gasolines may be available in your area to
help clean the air. General Motors recommends that you
use these gasolines if they comply with the
specifications described earlier.
I NOTICE:
Your vehicle was not designed for fuel that
contains methanol. Don’t use it. It can corrode
metal parts in your fuel system and also damage
plastic and rubber parts. That damage wouldn’t
be covered under your warranty.
6-4

NOTICE:
If you need a new cap, be sure to get the right
type. Your retailer can get one for you.
If you get
the wrong type, it may not fit properly. This may
cause your malfunction indicator lamp to light
and your fuel tank and emissions system may be
damaged. See “Malfunction Indicator Lamp” in
the Index.
FYng a Portable Fuel Container
I-
Never fill a portable fuel container while it is in
your vehicle. Static electricity discharge from the
container can ignite the gasoline vapor. You can
be badly burned and your vehicle damaged if
this
occurs. To help avoid injury to you and others:
Dispense gasoline only into approved
containers.
CAUTION: (Continued)
I
!
Do not fill a container while it is inside a
vehicle, in a vehicle’s trunk, pickup bed or
on any surface other than the ground.
inside of the fill opening before operating
the nozzle. Contact should be maintained
until the filling is complete.
Bring the fill nozzle in contact with the
Don’t smoke while pumping gasoline.
Checking Things Under the Hood
An electric fan under the hood can start up and
injure you even when the engine is not running.
Keep hands, clothing and tools away from any
underhood electric fan.
6-8

I A CAUTION:
Things that burn can get on hot engine parts and
start a fire. These include liquids like gasoline,
oil, coolant, brake fluid, windshield washer and
other fluids, and plastic or rubber. You or others
could be burned. Be careful not to drop or spill
things that will burn onto a hot engine.
The following sections tell you how to check fluids,
lubricants and important parts underhood.
Hood Release
To open the hood, first pull
the hood release handle
inside the vehicle, located to
the left of the steering wheel
under the instrument panel. Then
go to the front
of the vehicle and pull up on the
underhood release.
Lift the hood.
Before closing the hood, be sure
all the filler caps are on
properly. Then pull the hood down and close it fiiy.
6-9

4.0L Engine
When you open the hood, you'll see:
A. Remote Positive (+)
Battery Terminal
B. Windshield Washer
fluid Reservoir
C. Power Steering Fluid Reservoir G. Automatic Transaxle Fluid
D. Engine Oil Fill Cap Dipstick
(behind air cleaner)
E. Engine Oil Dipstick H. Engine Coolant Surge Tank
E Brake Fluid Reservoir I. Air Cleaner

Engine Oil
73
OIL
If the CHECK OIL LEVEL
message
or the oil warning
light
on the instrument
panel comes on, it means
you need to check your
engine oil level right away.
For more information, see “Check Oil Level Message”
or “Oil Pressure Warning Light” in the Index. You
should check your engine oil level regularly; this
is
an added reminder.
It’s a good idea to check your engine oil every time you
get fuel. In order to get an accurate reading, the 02 must
be warm and the vehicle must be on level ground.
Turn off the engine and give the oil a few minutes to
drain back into the oil pan. If you don’t, the oil dipstick
might not show the actual level.
Checking Engine Oil
Pull out the dipstick and clean it with a paper towel or
cloth, then push
it back in all the way. Remove it again,
keeping the tip down, and check the level.
When to Add Engine Oil
If the oil is at or below the ADD line, then you’ll need
to add at least one quart of oil. But you must use the
right kind. This part explains what kind of oil to use. For
crankcase capacity, see “Capacities and Specifications”
in the Index.

NOTICE:
Don’t add too much oil. If your engine has so
much oil that the oil level gets above the upper mark that shows the proper operating range,
your engine could be damaged.
Be sure to fill it enough to put the level somewhere in
the proper operating range. Push the dipstick all the way
back in when you’re through.
What Kind of Engine Oil to Use
Oils recommended for your vehicle can be identified by
looking for the “Starburst” symbol. This symbol
indicates that the oil has been certified by the American
Petroleum Institute (API).
Do not use any oil which
does not carry this Starburst symbol.
If you change your own
oil, be sure you use oil
that has the Starburst
symbol on the front of the
oil container. If you have
your oil changed
for you,
be sure the oil put into
your engine
is American
Petroleum Institute certified
for gasoline engines.
You should
also use the proper viscosity oil for your
vehicle, as shown in the following chart:
6-12

I RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS I
FOR BEST FUEL ECONOMY AND COLD STARTING, SELECT THE LOWEST
I SAE VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE. I
HOT
WEATHER
/OF OC' -
+loo- t38 -
+EO- t27 -
+60- - +16 -
+40--+4
+20---7
0---18 I
\WI
COLD
WEATHER
-1 -I
111. SAE 1d-30 PREFERRED above IPF (-l WC) SAE 5W-30
DO NOT USE SAE 2OW-50 OR ANY
OTHER GRADE OIL NOT RECOMMENDED
As shown in the chart, SAE low-30 is best for your
vehicle. However, you can use
SAE 5W-30 if it's going
to be colder than
60°F ( 16 " C) before your next oil
change. When it's very cold, you should use
SAE
5W-30. These numbers on an oil container show its
viscosity, or thickness.
Do not use other viscosity oils.
such as
SAE 20W-50.
NOTICE:
Use only engine oil with the American Petroleum
Institute Certified For Gasoline Engines
"Starburst" symbol. Failure to use the
recommended oil can result in engine damage not
covered by your warranty.
GM Goodwrench@ oil meets all the requirements for
your vehicle.
If you are in an area where the temperature falls below
-20°F (-29"C), consider using either an SAE 5W-30
synthetic
oil or an SAE OW-30 oil. Both will provide
easier cold starting and better protection for your engine
at extremely
low temperatures.
6- 13

Engine Oil Additives
Don’t add anything to your oil. Your retailer is ready
to advise if you think something should be added. 2. Press
RESET and
hold for five seconds. The word
RESET will appear, then OIL LIFE 100 % will
be displayed.
When to Change Engine Oil
Your vehicle has an Oil Life Indicator. The Oil Life
Indicator will let you know when to change your oil
and filter
-- usually between 3,000 miles (5 000 km)
and
7,500 miles (12 500 km) since your last oil change.
Under severe conditions, the indicator may come on
before
3,000 miles (5 000 km). Never drive your vehicle
more than
7,500 miles (12 500 km) or 12 months
(whichever occurs first) without an oil change.
The system won’t detect dust in the oil. So, if you drive in
a dusty area, be sure to change your oil every 3,000 miles
(5 000 km) or sooner. Remember to reset the Oil Life
Indicator when the oil has been changed. For more
information, see “Oil Life Indicator” in the Index.
How to Reset the Oil Life Indicator
Always reset the engine oil life to 100 percent after
every oil change.
It will not reset itself. To reset the
OIL LIFE reminder, do the following:
1. With the ignition on, press the
ENG button so the
OIL LIFE percentage
is displayed.
What to Do with Used Oil
Did you know that used engine oil contains certain
elements that may be unhealthy for your
skin and could
even cause cancer? Don’t let used oil stay on your skin
for very long. Clean your skin and nails with soap and
water, or a good hand cleaner. Wash or properly throw
away clothing or rags containing used engine oil. (See
the manufacturer’s warnings about the use and disposal
of oil products.)
Used oil can be a real threat to the environment. If you
change your own oil, be sure to drain all free-flowing oil
from the filter before disposal. Don’t ever dispose of oil
by putting
it in the trash, pouring it on the ground, into
sewers, or into streams or bodies of water. Instead,
recycle it by taking it to a place that collects used oil. If
you have a problem properly disposing of your used oil,
ask your retailer, a service station or a local recycling
center for help.
6-14

Air Cleaner
To check or replace the air filter:
1. Remove the radiator hose from the resonator channel.
2. Release the tension of the wing screw clamp on the
air intake hose where it attaches to the air cleaner
cover near the top of the engine. Just turn the wing
screw to the left, then detach the hose from the air
cleaner cover.
3. To remove the air cleaner cover, push the hose and
resonator assembly rearward and up, and hold them
out
of the way.

6. Remove the air filter.
7. Install the new air filter and reverse all steps to
reinstall the cover, electrical wires, hose and clamp.
Be sure the tabs of
the air cleaner cover fit into the
slots
of the air cleaner housing. Then make sure both
clamps are fully engaged.
Refer to the Maintenance Schedule to determine when to
replace the air filter.
See “Scheduled Maintenance Services” in the Index.
I
Operating the engine with the air cleaner off can
cause you
or others to be burned. The air cleaner
not only cleans the air, it stops flame if the engine
backfires.
If it isn’t there, and the engine
backfires, you could be burned. Don’t drive with
it
off, and be careful working on the engine with
the air cleaner
off.
1 NOTICE: I
If the air cleaner is off, a backfire can cause a
damaging engine fire. And, dirt can easily get
into your engine, which will damage it. Always
have the air cleaner in place when you’re driving.
6-17