service BUICK REGAL 1998 Repair Manual

I Maintenance Schedule I
- 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 vehicle under any of these conditions, the fluid and
filter do not require changing.
52,500 Miles (87 500 km)
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 *.)
rotation pattern and additional information. (See footnote +.)
0 Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
60,000 Miles (100 000 km)
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 *.)
Replace passenger compartment air filter.
(Continued)
DATE I
ACTUAL
7-9
ProCarManuals.com

I Maintenance Schedule I
60,000 Miles (100 000 km) (Continued)
0 For supercharged engines only: Check the supercharger oil level and add oil as
needed (or every
36 months, whichever occurs first). See “Recommended
Fluids and Lubricants” in this section.
An Emission Control Service. (See footnote?.)
0 Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
0 Inspect engine accessory drive belt.
0 Replace air cleaner filter.
0 Inspect fuel tank, cap and lines for damage or leaks. Inspect fuel cap gasket
rotation pattern
and additional information. (See footnote
+.)
An Emission Control Service.
An Emission Control Service.
for any damage. Replace parts as needed.
An Emission Control Service. (See footnote?.)
67,500 Miles (112 500 km)
0 Check Oil Life Monitor. If engine oil and filter are changed, reset monitor. See
“Engine Oil” in the Index.
MILEAGE
An Emission Control Service. (See footnote *.)
rotation pattern and additional information. (See footnote +.)
0 Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
7-10
ProCarManuals.com

I Maintenance Schedule I
75,000 Miles (I25 000 km) DATE
0 Check Oil Life Monitor. If engine oil and filter are changed, reset monitor. See
0 Inspect air cleaner filter if you are driving in dusty conditions. Replace filter if
SERVICED BY: ACTUAL
“Engine Oil” in the Index.
An Emission Control Service. (See footnote *.)
MILEAGE
An Emission Control Service. (See footnote “f)
necessary.
0 Replace passenger compartment air filter.
0 Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
rotation pattern and additional information. (See footnote
+.)
82,500 Miles (I37 500 km)
0 Check Oil Life Monitor. If engine oil and filter are changed, reset monitor. See
“Engine Oil” in the Index.
MILEAGE
An Emission Control Service. (See footnote *.)
rotation pattern and additional information. (See footnote +.)
0 Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
90,000 Miles (I50 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 *.)
I DATE 1
(Continued)
7- 13
ProCarManuals.com

I Maintenance Schedule 1
90,000 Miles (150 000 km) (Continued)
0 Replace passenger compartment air filter.
0 Replace air cleaner filter.
An Emission Control Service.
0 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?.)
0 For supercharged engines only: Check the supercharger oil level and add oil as
needed (or every
36 months, whichever occurs first). See “Recommended
Fluids and Lubricants” in this section.
An Emission Control Service. (See footnote?.)
rotation pattern and additional information. (See footnote
+.)
0 Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
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 *.)
rotation pattern and additional information. (See footnote +.)
17 Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
DATE I
MILEAGE
7-12
ProCarManuals.com

1 Maintenance Schedule I
100,000 Miles (166 000 km)
0 Inspect spark plug wires.
An Emission Control Service.
0 Replace spark plugs.
0 Change automatic transaxle fluid and filter if the vehicle is mainly driven
An Emission Control Service.
under one or more of these conditions:
- In heavy city traffic where the outside temperature regularly reaches 90°F
- In hilly or mountainous terrain.
(32°C)
or higher.
- When doing frequent
trailer towing.
- Uses such as found in taxi, police or delivery service.
If you do not use your vehicle under any of these conditions, the fluid and
filter
do not require changing.
150,000 Miles (240 000 km)
0 Drain, flush and refill cooling system (or every 60 months since last service,
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.
DATE -
MILEAGE ACTUAL 1 SERVICEDBY:
I DATE
7-13
ProCarManuals.com

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
peform 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.
7-14
ProCarManuals.com

At Least Twice a Year
Restraint System Check
Make sure the safety belt reminder light and all your
belts, buckles, latch plates, retractors and anchorages are working properly. If your vehicle has
a built-in child
restraint, also periodically make sure the harness straps,
latch plates, buckle, clip, retractors and anchorages are
working properly. Look for any other loose or damaged
safety belt and built-in child restraint system parts. If
you see anything that might keep a safety belt or built-in
child restraint system from doing its job, have it
repaired. Have any torn or frayed safety belts or harness
straps 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.
At Least Once a Year
Key Lock Cylinders Service
Lubricate the key lock cylinders with the lubricant
specified in Part
D.
Body Lubrication Service
Lubricate all hinges and latches including those for the
body doors, 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.
7-15
ProCarManuals.com

Starter Switch Check Brake-Transaxle Shift Interlock (BTSI) Check
L L CAUIION: I
1
When you are doing this check, the vehicle could
move suddenly. If it does, you or others could be
injured. Follow the steps below.
A CAUTUN:
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. 1.
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.
3. Try to start the engine in each gear. The starter
should work only in
PARK (P) or NEUTRAL (N).
If the starter works in any other position, your
vehicle needs service.
2.
3.
Before you start, be sure you have enough room
around the vehicle. It should be parked on
a
level surface.
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.
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 -
ProCarManuals.com

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
lever is
in PARK (P).
0 The key should come out only in LOCK.
Parking Brake and Automatic Transaxle PARK (P)
Mechanism Check
1 A C A UTION:
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.
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.
7-17
ProCarManuals.com

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 dealer’s service department
or other qualij?ed 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.
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. Check parking
brake adjustment. You may need to have your brakes
inspected more often if your driving habits or conditions
result in frequent braking.
7-18
ProCarManuals.com