maintenance OLDSMOBILE SILHOUETTE 1994 User Guide

Sewice & Appearunce Care
208
Inflation-Tire Pressure
The CertificatiodTire label which is on
the rear edge of the driver’s door shows
the correct inflation pressures for your
tires, when they’re cold. “Cold” means
your vehicle has been sitting for at least
three hours or driven no more than a mile.
NOTICE:
Don’t let anyone tell you that
underinflation
or overinflation is all
right. It’s not. If your tires don’t
have enough air (underinflation)
you can get:
Too much flexing
Too much heat
Tire overloading
Bad wear
Bad handling
Bad fuel economy.
If your tires have too much air
(overinflation) you can get:
Unusual wear
Bad handling
Rough ride
Needless damage from road
hazards.
When to Check
Check your tires once a month or more.
Don’t forget your compact spare tire. It
should be at
60 psi (420 1tPa).
How to Check
Use a good quality pocket-type gage to
check tire pressure. Simply loolting 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.
-
f
x
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.
After the tires have been rotated, adjust
the front and rear inflation pressure as
shown on the CertificationlTire label.
Make certain that all wheel nuts are
properly tightened. See
Wheel Nut
Toque in the Index.
ProCarManuals.com

Underbody Maintenance
Chemicals used for ice and snow
removal and dust control can collect on
the underbody.
If these are not
removed, accelerated corrosion (rust)
can occur on the underbody parts such
as fuel lines, frame, floor pan, and
exhaust system even though they have
corrosion protection.
At least every spring, flush these
materials from the underbody with
plain water. Clean any areas where mud
and other debris can collect. Dirt
packed in closed areas of the frame
should be loosened before being
flushed. Your dealer or an underbody
vehicle washing system can do this for
you.
I Collision Repair
Your vehicle was built with composite
SMC (Sheet Molded Compound)
fiberglass body panels and molded
RIM
(Reaction Injection Molded) front
fenders and bumper covers. These
panels require different collision repair
procedures than metal-paneled vehicles.
See your Oldsmobile dealer for
information on collision repair.
I Chemical Paint Spotting
Some weather and atmospheric
conditions can create
a chemical fallout.
Airborne pollutants can fall upon and
attack painted surfaces on your vehicle.
This damage can take two forms:
blotchy, ringlet-shaped discolorations,
and small irregular dark spots etched
into the paint surface.
Although no defect in the paint job
causes this, Oldsmobile will repair, at
no charge to the owner, the surfaces of
new vehicles damaged by this fallout
condition within 12 months or 12,000
miles (20
000 ltm) of purchase,
whichever comes first.
21 7
ProCarManuals.com

226
Service & Appearance Care
Engine Specifications
VIN Engine Code ...........................................
Type ................................................................
Displacement ..................................................
Compression Ratio .......... ....... .. .. .. ..... .............
Firing Order ...................... .. ....................... ... ..
Thermostat Temperature Specification . . . . . . . . .
31 00 V6 Engine
D
V6
3.1 Liters
8.5:1
1-2-3-4-5-6
195°F (91°C)
3800 V6 Engine
1
V6
3.8 Liters
9.0:
1
1-6-5-4-3-2
195°F (91°C)
Normal Maintenance Replacement Parts
Air Cleaner Element ....................................... AC Type A-773C AC Type A-974C
Engine
Oil Filter ............................................. AC Type PF-51 AC Type PF-47
PCV Valve
................. .. ................... .... ... . . . ...... AC Type CV-789C AC Type CV-892C
Spark Plugs
...... . , . . . . . . . . . . . . .. . . . . . . .. . . . . . . , . . . . . . . . . . . . . . . . AC Type oR43TS AC Type 41-600
Remote Lock Control Batteries (2)
............... DL 2016 DL 2016
Gap: 0.045
inch (1.14
mm) Gap: 0.060 inch (1.52 mm)
ProCarManuals.com

This part covers the maintenance
required for
your Oldsmobile. Your
vehicle needs these services to retain
its safety, dependability and emission
control performance.
I-
I 1 4 zP/an
Protection
Have you purchased the
GM Protection Plan?
The Plan supplements your new vehicle warranties. See your
Oldsmobile dealer for details.
Part 7
Maintenance Schedule
Section
Introduction
A Word About Maintenance ................................................................... 232
Your Vehicle and the Environment
........................................................ 232
How This Part is Organized ................................................................... 232
Using Your Maintenance Schedule
........................................................ 233
Selecting the Right Schedule
.................................................................. 233
Schedule
I ........................................................................\
........................ 234
Schedule
I1 ........................................................................\
....................... 236
Explanation
of Scheduled Maintenance Services .................................. 238
At Each Fuel Fill
........................................................................\
.............. 240
At Least Once a Month
........................................................................\
... 240
At Least Once a Year
........................................................................\
...... 241
C. Periodic Maintenance Inspections .............................................................. 243
D. Recommended Fluids & Lubricants ............................................................ 244
E. Maintenance Record ........................................................................\
............. 246
A. Scheduled Maintenance Services
B. Owner Checks
& Services
231
ProCarManuals.com

Maintenance Schedule
232
Introduction
A Word About Maintenance
We at General Motors want to help you
keep your vehicle in good working
condition. But we don’t lmow 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 malting
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 Oldsmobile
dealer, the place many GM owners
choose to have their maintenance work
done. Your dealer can be relied upon to
use proper parts and practices.
Your Vehicle and the Environment
Proper vehicle maintenance not only
helps to keep your vehicle in good
working condition, but also helps the
environment. All recommended
maintenance procedures are important. Improper vehicle maintenance or the
removal of important components can
significantly affect the quality
of the air
we breathe. Improper fluid levels or
even the wrong tire inflation can
increase the level of emissions from
your vehicle.
To help protect our
environment, and to help keep your
vehicle in good condition, please
maintain your vehicle properly.
How This Part is Organized
The remainder of this part is divided
into five sections:
Section
A: Scheduled Maintenance
Services shows what to have done and
how often. Some of these services can
be complex,
so unless you are technically
qualified and have the necessary
equipment, you should let your dealer’s
service department or another qualified
service center do these jobs. If
you are skulled enough to do some
work on your vehicle, you will probably
want to get the service information GM
publishes. You will find a list of
publications and how to get them in
this manual. See
Service Publications
in the Index.
Section B: Owner Checks and Services
tells you what should be checked
whenever you stop for fuel. It also
explains what you can easily do to help
keep your vehicle in good condition.
Section
C: Periodic Maintenance
Inspections explains important
ProCarManuals.com

inspections that your Oldsmobile
dealer’s service department or another
qualified service center should perform.
Section
D: Recommended Fluids and
Lubricants lists some products
GM
recommends to help keep your vehicle
properly maintained. These products, or
their equivalents, should be used
whether you do the work yourself or
have
it done.
Section
E: Maintenance Record
provides
a place for you to record the
maintenance performed on your vehicle.
Whenever any maintenance is
performed, be sure to write
it down in
this section. This will help you
determine when your next maintenance
should be done. In addition, it is
a good
idea to keep your maintenance receipts.
They may be needed to qualify your
vehicle for warranty repairs.
Section A: Scheduled
Maintenance Services
Using Your Maintenance
Schedule
This section tells you the maintenance
services you should have done and
when you should schedule them. Your
Oldsmobile 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
recommended limits.
You will find
these limits on your vehicle’s
CertificatiodTire label. See
Loading
Your Vehicle in the Index.
are driven on reasonable road
surfaces within legal driving limits.
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?
Most trips are less than 4 miles
Most trips are less than 10 miles
(6 ltm) .
(16 ltm) when outside temperatures
are below freezing.
The engine is at low speed most of the
time (as in door-to-door delivery, or in
stop-and-go traffic).
areas.
You operate your vehicle in dusty
You tow a trailer.
If any one (or more) of these is true for
your driving, follow Schedule
I.
Schedule I1
Follow Schedule I1 only if none of the
above conditions is true.
233
ProCarManuals.com

Muintenunce Schedule
234
Schedule I
Follow Schedule I if your vehicle is
MAINLY driven under one or more of
the following conditions:
When most trips are less than 4 miles
When most trips are less than 10
(6
ltm)
.
miles (16 ltrn) and outside
temperatures remain below freezing.
When most trips include extended
idling and/or frequent low-speed
operation, as in stop-and-go traffic.
When towing a trailer.
When operating in dusty areas.
Schedule I should also be followed if
the vehicle is used for delivery service,
police, taxi
or other commercial
applications.
::: = An Emission Control Service.
j- = The U.S. Emiyonmental Protection Agency
or the California Air Resources Board has
determined that the failure
to pelform this
maintenance item will
not nullify the
emission warranty or limit recall liability
prior
to the completion of vehicle useful life.
General Motors, however, urges that all
recommended maintenance services be
pelformed at the indicated intervals and the
maintenance be recorded in “Section
E:
Maintenance Record.”
ITEM TO BE SERVICED WHEN TO PERFORM
No* See Explanation of Scheduled Maintenance Miles (Kilometers) or Months
Services
following Schedules I and 11. (whichever occurs firsl).
1 Engine Oil Change & Oil Filter Change* Every 3,000 Miles (5 000 km) or 3 Montl~s..
2 Chassis Lubrication Every 3,000 Miles (5 000 lm) or 12 Months.
ProCarManuals.com

Maintenance Scheduk
Schedule I1
Follow Schedule I1 ONLY if none of
* = An Emission Control Service.
t = The U.S. Environmental Protection Agency
or the California Air Resources Board has
determined that the failure to perform this
maintenance item will
not nullify the
emission warranty
or limit recall liability
prior
to the completion of vehicle useful life.
General Motors, however, urges that
all
recommended maintenance services be
performed at the indicated intervals and the
maintenance be recorded in “Section
E:
Maintenance Record.”
ITEM TO BE SERVICED
No’ See Explanation of Scheduled Maintenance
Services
following Schedules I and 11.
WHEN TO PERFORM
Miles (kilometers) or Months
(whichever occurs first). 1
I 2 I Chassis Lubrication 1 Evew 7,500 Miles (12 500 km) or 12 Months. 11
I 4 I Engine Accessorv Drive GDection I Everv 60.000 Miles (100 000 la) or 60 Months. 11
236
I I
ProCarManuals.com

Maintenance Schedule
238
Explanation of Scheduled
Maintenance Services
Following are explanations of the
services listed in Schedule I and
Schedule 11.
The proper fluids and lubricants to use
are listed in Section D. Make sure
whoever services your vehicle uses
these. All parts should be replaced and
all necessary repairs done before you or
anyone else drives the vehicle.
ITEM
NO. SERVICE
1. Engine Oil and Filter Change* -
Always use SH or SG Energy
Conserving
I1 oils of proper viscosity.
The
“SH” or “SG” designation may
be shown alone
or in combination
with others, such as “SH/CD,”
“SH,
SG, CD,” “SG/CD,” etc. To
determine the preferred viscosity for
your vehicle’s engine (e.g.,
SAE 5W-
30 or SAE 10W-30), see
Engine Oil
in the Index.
2. Chassis Lubrication - Lubricate
suspension and steering linkage.
Lubricate the transaxle shift linkage,
and parking brake cable guides,
underbody contact points and
linkage.
3. Tire and Wheel Rotation and
Inspection
- For proper wear and
maximum tire life, rotate your tires
following the instructions in this
manual. See
Tires, Inspection E.
Rotation in the Index. Check the
tires for uneven wear
or damage. If
you see irregular or premature wear,
check the wheel alignment. Check for
damaged wheels also.
Engine Accessory Drive Inspection
- Inspect the drive belt for cracks,
fraying, wear and proper tension.
Replace as needed.
I
Cooling System Servicee - Drain,
flush and refill the system with new
or approved recycled coolant
conforming to GM Specification
I
1825M. Keep coolant at the proper 1
mixture as specified. See Coolant in
the
Index. This provides proper
freeze and boil protection, corrosion
I
inhibitor level and maintains proper ’
engine operating temperature.
Inspect hoses
and replace if they are
cracked, swollen or deteriorated.
Tighten screw-type hose clamps.
Clean the outside of the radiator and
air conditioning condenser. Wash tht
pressure cap and neck.
To help ensure proper operation, we
recommend
a pressure test of both the
cooling system and the pressure cap.
ProCarManuals.com

6. Transaxle Service - Change both
the fluid and filter every
15,000 miles
(25 000 ltm) if the vehicle is mainly
driven under one or more of these
conditions:
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
car or delivery service.
If you do not use your vehicle under
any of these conditions, change both
the
fluid and filter every 100,000 miles
(166 000 ltm) .
7. Spark Plug Replacement::' -
Replace spark plugs with the proper
type. See
Replacement Parts in the
Index.
8. Spark Plug Wire Inspection''-
Inspect for burns, cracks or other
damage. Check the boot fit at the
distributor or coils and at the spark
plugs. Replace wires
as needed.
9. Exhaust Gas Recirculation (EGR)
System 1nspection':t
- Conduct
the
EGR system service as described
in the service manual.
To purchase a
service manual, see
Service
Publications
in the Index.
IO. Air Cleaner Filter Replacement+-
Replace every 30,000 miles
(50 000 ltm) or more often under
dusty conditions.
Ask your dealer
for the proper replacement intervals
for your driving conditions.
11. Air Cleaner Inspection''? - Inspect
all hoses and ducts for proper
hookup. Make sure the valve works
properly.
1nspection';:t - Inspect fuel tank,
cap and lines for damage
or leaks.
Inspect fuel cap gasket for an even
filler neck imprint or any damage.
Replace parts as needed. Periodic
replacement of the fuel filter
is not
required.
12. Fuel Tank, Cap and Lines
13. Engine Timing and Distributor
Check
(3100 Code D engine
only)'xt
- Adjust the timing to the
underhood label specifications.
Inspect the inside and outside
of the
distributor cap and rotor for cracks,
carbon tracking and corrosion.
Clean or replace as needed.
NOTE: To determine your engine's
displacement and code, see
Engine
Identification
in the Index.
': = An Enzission Control Service.
t = The U.S. Environmental Protection Agency
or the California Air Resources Boa1.d has
determined that the failure
to pelform this
maintenance item will
not nullify the
emission warranty
or limit recall liability
prior
to fhe completion of ~~ehicle useful life.
General
Motors: however, urges that all
recornmended maintenance services be
performed at the indicated intervals and the
maintenance be recorded
in "Section E:
Maintenance Record."
239
ProCarManuals.com