1998 Oldsmobile Aurora Owner's Manuals

I Maintenance Schedule I
75,000 Miles (125 000 km)
0 Check Oil Life Monitor. If engine oil and filter are changed, reset monitor.
See “Engine Oil” in the Index.
An Emission Control Service. (See footnote *.)
(See footnote #.)
rotation pattern and additional information. (See footnote +.)
I7 Lubricate chassis components (or at each engine oil and filter change).
0 Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
82,500 Miles (137 500 km)
Check Oil Life Monitor. If engine oil and filter are changed, reset monitor.
See “Engine Oil” in the Index.
An Emission Control Sewice. (See footnote *.)
0 Lubricate chassis components (or at each engine oil and filter change).
0 Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
(See footnote
#.)
rotation pattern and additional information. (See footnote +.)
90,000 Miles (150 000 km)
0 Check Oil Life Monitor.
If engine oil and filter are changed, reset monitor.
See “Engine Oil” in the Index.
An Emission Control Service. (See footnote *.)
DATE
DATE
I
MILEAGE
(Continued)
7-11

Maintenance Schedule
90,000 Miles (150 000 km) (Continued)
0
0
Lubricate chassis components (or at each engine oil and filter change).
(See footnote
#.)
Inspect throttle body bore and valve plates for deposits, open the throttle valve
and inspect all surfaces. Clean
as required.
An Emission Control Service. (See footnotej-.)
Replace air cleaner filter.
An Emission Control Service.
Inspect fuel tank, cap and lines for damage or leaks. Inspect fuel cap gasket
for any damage. Replace parts as needed.
An Emission Control Service. (See footnote-)-.)
Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
rotation pattern and additional information. (See footnote
+.)
97,500 Miles (162 500 km)
0 Check Oil Life Monitor. If engine oil and filter are changed, reset monitor.
See “Engine Oil” in
the Index.
An Emission Control Service. (See footnote *.)
0 Lubricate chassis components (or at each engine oil and filter change).
(See footnote
#.)
Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
rotation pattern and additional information. (See footnote
+.)
DATE I
7-12

I Maintenance Schedule I
100,000 Miles (166 000 km)
0 Inspect spark plug wires.
Replace spark plugs.
0 Change automatic transaxle fluid and bottom screens if the vehicle is mainly
An Emission Control Service.
An Emission Control Service.
driven under one or more of these conditions:
I DATE 1
I MILEAGE ACTUAL I SERVICEDBY I
- In heavy city traffic where the outside temperature regularly reaches
90°F (32°C) or higher.
- In hilly or mountainous terrain.
- When doing frequent trailer towing.
- Uses such as found in taxi, police or delivery service.
If you do not use your veh.icle under any of these conditions, th.e jluid and
filter do not require changing.
150,000 Miles (240 000 km)
17 Drain, flush and refill cooling system (or every 60 months since last service,
MILEAGE whichever occurs first). See “Engine Coolant” in the Index for what to use.
Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test
the cooling system and pressure cap.
An Emission Control Service.
7-13

Part B: Owner Checks and Services
Listed below are owner checks and services which
should be performed at the intervals specified to help
ensure the safety, dependability and emission control
performance of your vehicle.
Be sure any necessary repairs are completed at once.
Whenever any fluids or lubricants are added to your
vehicle, make sure they
are the proper ones, as shown
in
Part D.
At Each Fuel Fill
It is important for you or a service station attendant to
peq5orm these underhood checks at each
fuel fill.
Engine Oil Level Check
Check the engine oil level and add the proper oil
if necessary. See “Engine Oil” in the Index for
further details.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL@
coolant mixture if necessary. See “Engine Coolant” in
the Index for further details.
Windshield Washer Fluid Level Check
Check the windshield washer fluid level in the
windshield washer tank and add the proper fluid if
necessary. See “Windshield Washer Fluid” in the
Index for further details.
At Least Once a Month
Tire Inflation Check
Make sure tires are inflated to the correct pressures.
See “Tires” in the Index for further details.
Cassette Deck Service
Clean cassette deck. Cleaning should be done every
50 hours of tape play. See “Audio Systems” in the
Index for further details.
Power Antenna Service
Clean power antenna mast. See “Audio Systems” in
the Index for further details.

At Least Twice a Year At
Least Once a Year
Restraint System Check
Make sure me safety belt reminder light and all your
belts, buckles, latch plates, retractors and anchorages are
working properly. Look for any other loose or damaged
safety belt system parts.
If you see anything that might
keep a safety belt system from doing its job, have it
repaired. Have any torn or frayed safety belts replaced.
Also look for any opened or broken air bag coverings,
and have them repaired or replaced. (The air bag system
does not need regular maintenance.)
Wiper Blade Check
Inspect wiper blades for wear or cracking. Replace blade
inserts that appear worn or damaged or that streak or
miss areas of the windshield. Also see “Wiper Blades,
Cleaning” in
the Index.
Automatic Transaxle Check
Check the transaxle fluid level; add if needed. See
“Automatic Transaxle”
in the Index. A fluid loss
may indicate a problem. Check the system and
repair if needed.
Key Lock Cylinders Service
Lubricate the key lock cylinders with the lubricant
specified in Part
D.
Body Lubrication Service
Lubricate all body door hinges. Also lubricate all
hinges and latches, including those for the hood, rear
compartment, glove box door, console door and any
folding seat hardware. Part
D tells you what to use.
More frequent lubrication may be required when
exposed to a corrosive environment.

Starter Switch Check Brake-Transaxle Shift Interlock (BTSI) Check
A CAUTION:
When you are doing this check, the vehicle could
move suddenly.
If it does, you or others could be
injured. Follow the steps below.
1. Before you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake (see
“Parking Brake” in the Index if necessary) and
the regular brake.
NOTE:
Do not use the accelerator pedal, and be
ready to turn
off the engine immediately if it starts.
should work only in PARK
(P) or NEUTRAL (N). If
the starter works in any other position, your vehicle
needs service.
3. Try to start the engine in each gear. The starter
r
When you are doing this check, the vehicle could
move suddenly.
If it does, you or others could be
injured. Follow the steps below.
1. Before you start, be sure you have enough room
around the vehicle. It should be parked on
a
level surface.
2. Firmly apply the parking brake (see “Parking Brake”
in the Index if necessary).
NOTE: Be ready to apply the regular brake
immediately if the vehicle begins to move.
3. With the engine off, turn the key to the RUN
position, but don’t start the engine. Without
applying
the regular brake, try to move the shift
lever out
of PARK (P) with normal effort. If the
shift lever moves out of
PARK (P), your vehicle’s
BTSI needs service.
7-16 ~

Ignition Transaxle Lock Check
While parked, and with the parking brake set, try to turn
the ignition key to LOCK in each shift lever position.
The key should turn to LOCK only when the shift
The key should come out only in LOCK.
lever
is in PARK (P).
Parking Brake and Automatic Transaxle PARK (P)
Mechanism Check
A CAb I’ION:
When you are doing this check, your vehicle
could begin
to move. You or others could be
injured and property could be damaged. Make
sure there
is room in front of your vehicle in case
it begins to roll. Be ready to apply the regular
brake at once should the vehicle begin to move.
Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular brake, set
the parking brake.
e
a
To check the parking brake’s holding ability: With
the engine running and transaxle
in NEUTRAL (N),
slowly remove foot pressure from the regular brake
pedal.
Do this until the vehicle is held by the parking
brake only.
To check the PARK (P) mechanism’s holding ability:
With the engine running, shift to PARK (P). Then
release all brakes.
Underbody Flushing Service
At least every spring, use plain water to flush any
corrosive materials from the underbody. Take care to
clean thoroughly any areas where mud and other
debris can collect.

Part C: Periodic
Maintenance Inspections
Listed below are inspections and services which should
be performed at least twice a year (for instance, each
spring and fall). You should let your retailer’s service
department or other qualified service center do these
jobs. Make sure any necessary repairs are completed
at once.
Proper procedures to perform these services may be
found
in a service manual. See “Service and Owner
Publications” in the Index.
Steering, Suspension and Front Drive
Axle Boot and Seal Inspection
Inspect the front and rear suspension and steering
system for damaged, loose or missing parts, signs of
wear or lack of lubrication. Inspect the power steering
lines and hoses for proper hook-up, binding, leaks,
cracks, chafing, etc. Clean and then inspect the drive
axle boot seals for damage, tears or leakage. Replace
seals if necessary.
Exhaust System Inspection
Inspect the complete exhaust system. Inspect the body
near the exhaust system. Look for broken, damaged,
missing or out-of-position parts as well as open seams,
holes, loose connections or other conditions which
could cause a heat build-up in the floor pan or could let
exhaust fumes into the vehicle. See “Engine Exhaust”
in the Index.
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.
7-18