maintenance schedule BUICK ROADMASTER 1993 Owners Manual

Air Cleaner
The air cleaner is located behind the engine fan. To
access the filter, lift up on the latches and let the cover
down. Replace the filter and snap the latches.
Refer
to the Maintenance Schedule to determine when
to replace-the air filter and the
PCV filter.
See “Scheduled .Maintenance Services”
in the Index.
Operath e engine wltn tne air cleaner off can
cause you or others to be burned. The air
cleaner not only cleans the air,
it stops flame i
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 tT
engine with t‘ air cf - - -- -8r om-
_.
I
253

Automatic Transmission Fluid
When to Check and Change:
A good time to check your auiomatic transmission fluid
level is when the engine oil is changed. Refer to the
Maintenance Schedule to determine when to change
your fluid. See “Scheduled Maintenance Services” in
the Index.
How to Check:
Because this operation can be a little difficult, you may
choose to have this done at
a Buick,dealership Service
Department.
If
you do it yourself, be sure to follow all the
instructions here, or you could get a false reading on the
.
dipstick. Wait
at least
30 minutes before checking the
transmission fluid level
if you have been driving:
0 When outside temperatures are above. 90 F ‘(32 C);
0 At high speed for quite a while. I
In heavy traffic - &specially in hot weathEr.: . .
While pulling a trailer.
To get the right reading, the fluid should be at normal
operating temperature, which is
180 F to 200 *F (82 C
To check transmission fluid hot: Get the vehicle ‘warmed
up
by driving about 15 miles (24 krn) when outside
temperatures are above
50 F (1 0 C). If it’s colder than
50 F ( 10 C), drive the vehicle in “D” (3rd Gear) until
the engine temperature gage moves and then remains
steady for ten minutes. Then follow the hot check
procedures.
To check transmission fluid cold: A cold check is made
after the vehicle has been sitting for
8 hours or more
with the engine
off and is used only as a reference. Let
the engine run at idle for
5 minutes if outside
temperatures are
50 F (10 C) or more. If ‘it’s colder
than
50 OF (10 * C), you may have to idle the engine
longer.
A hot check must €0110~ when fluid is added
during
a cold check.
..
to 93 C).
254

How to Add Fluid:
Refer to the Maintenance Schedule to determine what
kind
of transmission fluid to use. See “Recommended
Fluids and.lLubricants” in the Index.
If the fluid level is low, add only enough of the proper
fluid to bring the level up to the COLD area for a cold
check or the
HOT area fora hot check. It doesn’t take
much fluid, generally less than a pint. Don’t overfill.
we
recommend you use only fluid labeled DEXRONBIIE,
because fluids with that label are made-especially for
you automatic transmission. Damage caused by fluid
other than DEXRON@IIE
is not covered by your new
vehicle warranty.
0 After adding fluid, recheck the fluid level as
described under “How to Check.77
0 When the correct-fluid level is obtained, push the
dipstick back in all the way.
Rear Axle
When to Check and Change Lubricant:
Refer to the Maintenance Schedule to determine how
often to check the lubricant and when to change it. See
“Periodic Maintenance Inspections” in the Index.
How to Check Lubricant:
If the level is below the bottom of the filler plug hole,
you’ll need to add some lubricant. Add enough lubricant
to raise the level to the bottom
of the filler plug hole.
What
to Use:
Standard Differential
Use Axle Lubricant (GM Part
No. 1052271) or SAE
80W-90 GL-5 gear lubricant.
Limited-Slip Differential
To add lubricant when the level is low, use Axle
Lubricant (GM Part
No. 1052271) or SAE 8OW-90
GL-5 gear lubricant.
To completely refill after draining,
add
4 ounces (1 18 ml) of Limited-Slip Differential
Lubricant Additive (GM Part
No. 1052358). Then fill to
the bottom of the filler plug hole with Axle Lubricant
(GM Part
No. 1052271) or SAE 80W-90 GL-5 gear
lubricant.

How To Check Power Steering Fluid: , ’ .
’ Unscrew the cap and wipe the dipstick with a clean rag.
Replace the cap and completely tighten it. Then remove
the cap again and look at the fluid level on the dipstick.
When the engine compartment is hot, the level %-‘- L
should be at the “HOT” mark. *. s
When the engine Compartment is cool, the level
should be at the “FULL
COLD’; mark.
What to Add:
Refer to the Maintenance Schedule to determine what
kind
of fluid to use. See (‘Recommended Fluids and
Lubricants” in the Index.
k‘ T, ’ . I

When to Check: Check your tires once .a month or
more.
Don’t forget
your compact spare-tire (if SO equipped). It
should be at 60 psi (420 Pa).
How to Check: Use a good quality pocket-type gage to
check tire pressure. Simply looking at the tires will not
tell you the pressure, especially if
you have radial tires
- which may look properly inflated even if they’re
underinflated.
If your tires have valve caps, be sure to put them back
.on. They help prevent leaks by keeping
out dirt and
moisture.
Tire Inspection and Rotation
To make your tires last longer, have them inspected and
rotated at the mileages recommended in the, Maintenance Schedule. See “Scheduled Maintenance Services”
in the Index.
Use this rotation pattern.
t
273

Appearance
You
PART
NUMBER SIZE
12345343 16 02. (0.473L
1052277 12
oz. (0.354L)
1052863
L.oz. (0.028kg)
1050172 16 oz. (0.473L)
1050173 16
oz. (0.473L)
1050174
16 oz. (0.473L)
1 0502 1 4 32
oz. (0.946L)
1050244
16 oz. (0.473L)
1050427 23
oz. (0.680L)
1050429 6 lb. (2.72kg)
1052349 12
oz. (0.340kg)
I05 1055 16 oz. (0.473L)
1051398"
8 02. (0.237L)
1051515 32
oz. (0.946L)
1052870
16 02. (0.473L)
* Not recommended for pigskin suede leather.
See Your General Motors Dealers for These Product
See Your Maintenance Schedule for Other Products.
Care and Maintenance Materials
:an get these from your Buick dealer.
DESCRIPTION USAGE
lgic Mirror Creme Wax Exterior cleaner and polish
Spray-A-Squeak Weather strips Silicone Grease
. Stops squeaks
Tar and Road Oil Remover Also removes old waxes, polishes
Chrome Cleaner and Polish Removes rust
and corrosion
White Sidewall Tire Cleaner Cleiins white and -black
tires
Vinylbeather Cleaner Spot and stain removal
Fabric Cleaner Spot and
stain removal
Glass Cleaner Also spot cleans vinyls
Multi-PurposkPowdered Cleaner Cleans vinyl
and cloth, ako,
tires andmats
Lubriplate (White Grease) For hood,
trunk,
door hiriges afid latches
Preservatone Vinyl Top Dressing
-
Spot Lifter For cloth
Washer Solvent Windshield-washing System
Wash-Wax (conc.) Exterior Wash
286

Part 7 Main.tenance Schedule
dependability and emission control performance. Part
7 includes:
Introduction
......................................................................
A Word About Maintenance .....................................................
Your Vehicle and the Environment ................................................
How This Part is Organized .....................................................
Section A: Scheduled Maintenance Services .............................................
Using Your Maintenance Schedules ...............................................
SelectingtheRightSchedule ....................................................
Schedule1 ...................................................................
Schedule11 ..................................................................
Explanation of Scheduled Maintenance Services .....................................
Section B: Owner Checks and Services .................................................
AtEachFuelFill ..............................................................
AtLeastOnceaMonth .........................................................
AtLeastOnceaYear ...........................................................
Section C: Periodic Maintenance Inspections ............................................
Section D: Recommended Fluids and Lubricants .........................................
Section E: Maintenance Record .......................................................

IMPORTANT:
KEEP ENGINE OIL
AT THE
PROPER
LEVEL AND CHANGE AS
RECOMMENDED
Plan I
Have you purchased the GM Protection Plan? The
Plan supplements your new vehicle warranties. See
your Buick dealer for details.
Introduction
A Word About Maintenance
We at General Motors want to help, you keep your
vehicle in good working condition. But we don’t know
exactly how you’ll drive it. You may drive very short
distances only a few times’ a week. Or you may drive
long distances all the time in very hot, dusty weather.
You may use your vehicle in making deliveries. Or you
may drive it to work,
to do errands or in many other
ways.
Because
of all the different ways people use their GM
vehicles, maintenance needs vary. You may even need
more frequent checks and replacements than
you will
find
in the schedules in this part. So please read this part
and note how you drive. If you have any questions
on
how to keep your vehicle in good condition, see your
Buick dealer, the place many GM owners thoose to
have their maintenance work done. Your dealer can be
relied upon to use proper parts and practices.

I
Section A: Scheduled Maintenance
Services
Using Your Maintenance Schedules
This section tells you the maintenance services you
should have done and when
you should schedule them.
Your Buick dealer knows your vehicle best and wants
you to be happy with it.
If you go to your dealer for your
service needs, you’ll
know that GM-trained and
supported service people will perform the work using
genuine GM parts.
These schedules are
for vehicles that:
carry passengers and cargo within recommefided
limits.
You will find these limits on your vehicle’s
Tire-Loading Information label. See “Loading Your
Vehicle” in the Index.
are driven on reasonable road surfaces within legal
driving limits.
a use the recommended unleaded fuel. See “Fuel” in
the Index.
Selecting the Right Schedule
First you’ll need to decide which of the two schedules is
right for your vehicle. Here’s how to decide which
schedule to follow:
Schedule I
Is any one of these true for your vehicle?
a Most trips are less than 4 miles (6 km).
Most trips are less than 10 miles (16 km) when
outside temperatures are below freezing.
The engine is at low speed most of the time (as in
door-to-door .deliveryy or in stop-and-go traffic).
0 You operate your vehicle in dusty areas.
You tow a trailer.
If any one (or more) of these is true.for your driving,
follow Schedule
I.
Schedule Il
Follow Schedule 11 only if none of the above conditions
is true.
301

Scheduled Maintenance Services Schedule I
Follow Schedule'I if your car is MAINLY driven under one or more of the following conditions:
0 When most trips are less than 4 miles (6 kilometers).
e -When most trips are' less than 10 miles (16 kilometers) and outside temperatures remain below freezing.
.e When mosttrips include extended idling and/oi- frequent low-speed operation as \
in stop-and-go traffic.
e Towing a trailer.*?
0 When operating in dusty areas.
Schedule I should also be followed if the car is used for delivery service, police, taxi\
or other commercial applications.
TO~BE SERVICED WHEN TO PERFORM (See Explanation of
Scheduled Maintenance Miles (kilometers) or
Services Following Months, Whichever
Schedules I and 11j Occurs First
I 1. Engine Oil & Oil Filter Every 3 000 mi. (5000 km)
Change* or 3 months.
I 2. Chassis Lubrication I Every other oil change
I
3. Throttle Body Mounting At 6 OQd)..mi,~10~000 km)
Bolt Torque*
I
At 6,000 mi. (10 000 km) and
km) or as necessary
4. Tire 8L Inspection ' then every 15 000 mi. (25 000 Rotation
5. Engine Accessory Drive
Belt(s) Inspection" Every
30 000 mi. (50 000 km) or 24 months.
MILES (000) I
LO 10 15
0
0
0
20 25
00
.
KILOMETER;
35 40 45
000
0
0
000)
50 55 60 65
000.
0 a
0
0
302