engine BUICK RIVIERA 1993 Workshop Manual

Then, without shutting off the engine, follow these
stem:
1. Pull out the dipstick and
wipe it with a clean rag
or paper towel.
2. Push it ‘back in aa the way, wait three seconds and
I :then pull it back out again.
3. Check both sides ofthe
dipstick, and read the
lower level. The fluid
level must be
.in the
cross-hatched
mea.
P
4. If the fluid level is where it should be, push the
How to Add Fluid:
dipstick back in all the way.
Refer
to the Maintenance Schedule to determine what
kind of transaxle fluid to
use. See “Recommended
Fluids and Lubricants” in the Index.
If the- fluid level is low, add only enough of the proper
fluid
to bring the level into the cross-hatched area on the
dipstick. It doesn’t take much fluid, generally less than a \
pint. D,on’t overfill. We recommend you use only fluid
labeled DEXRONB-IIE, because fluids with that label
230
I

are made especially for your automatic transaxle.
Damage caused by fluid other than
DEXRONs-IIE is
not covered by your new vehicle warranty.
After adding fluid, recheck the fluid level as
described under
“How to Check.”
When the correct fluid level is obtained, push the
dipstick back in all the way.
Engine Coolant
The following explains your cooling system and how to
add coolant when it is low. If you have a problem with
engine overheating, see “Engine Overheating” in the
Index.
The proper coolant for your Buick
will:
Give freezing protection down to -34’F (-37 ’ C) .
0 Give boiling protection up to 262 ’ F ( 128 ’ C) .
Protect against rust and corrosion.
Help keep the proper engine temperature.
0 Let the warning lights work as they should.
What to Use:
Use a mixture of one-half clean water (preferably
distilled) and one-half antifreeze that meets “GM Specification 1825-M,” which won’t damage aluminum
parts. Use GM Engine Coolant Supplement (sealer) with
any complete coolant change. You can also use a
recycled coolant conforming to “GM Specifications
1825-M” with a complete coolant flush and-refill.
If you
use these, you don’t need to add anything else.
Adding only plain water to your cooling system
can be dangerous. Plain water, or some other
liquid like alcohol, can boil before the proper
coolant mix will. Your vehicle’s coolant warnin!
system
is set for the proper coolant mix. With
plain water or the wrong mix, your engine coul
get
too hot but you wouldn’t get the overheat
warning. Your engine could catch fire and you
or others could be burned. Use a
50150 mix of
clean water and
a proper antifreeze.
231

Adding Coolant
The engine coolant
recovery tank is located at
the left
of the engine
compartment.
To Check Coolant: When
your engine is cold, the
coolant level should be at
“FULL COLD,” or a little
higher. When your engine
is
warm, the level should be
up to
“FULL HOT,” or a
little higher.
To Add Coolant: If you need more coolant, add the
proper mix at the coolant recovery
tank.
232

A CAUTION:
Turning the radiator pressure cap when the
engine and radiator are hot can
allow steam and
scalding liquids to blow out and burn you badly.
With the coolant recovery tank, you
will almost
never have to add coolant at the radiator. Never
turn the radiator pressure cap
-- even a little --
when the engine and radiator are hot.
Add coolant mix at the recovery tank, but be careful not
to spill it.
A CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol,
and it
will burn if the engine parts are hot
enough. Don’t spill coolant on a hot engine.
Radiator Pressure Cap
When you replace your radiator pressure cap, an ACS
cap
is recommended.
Thermostat
Engine coolant temperature is controlled by a thermostat
in the engine coolant system. The thermostat stops ,the
flow of coolant through the radiator until the coolant
reaches a preset temperature.
When you replace your thermostat, an AC@ thermostat
is recommended. I
233

i Power Steering Fluid I
What to Add:
Refer to the Maintenance Schedule to determine what
kind
of fluid to use. See “Recommended Fluids and
Lubricants”
in the Index.
I
i
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
When the engine compartment is cool, the level should be
at
the “HOT” mark.
should be at the
“FULL COLD” mark.
I

Brake Master Cylinder you’ll have too much fluid when you get new brake
linines. You should add (or remove) brake fluid, as
U
your brake master cylinder necessary, only when work is done on the brake
is here. It is filled with hydraulic system.
DOT-3 brake fluid.
I
I
A CAUTION:
If you have too much brake fluid, it can spill on
the engine. The fluid will burn
if the engine is
hot enough. You or others could be burned,
arr’
your vehicle could be damaged. Add brake flutu
only when work is done on the brake hydraulic
system.
When your brake fluid falls to a low level, your brake
There are only two reasons why the brake fluid level in light will on. See System Warning
your master cylinder might go down. The first is that the Light,’ in the Index,
brake fluid goes down to an acceptable level during
normal brake lining wear. When new linings are put in,
the fluid level goes back
up. The other reason is that
fluid ’is leaking out of the brake system. If it is, you
should have your brake system fixed, since a leak means
that sooner or later
your brakes won’t work well, or
won’t work at all.
So, it isn’t a good idea to “top off’
your brake fluid. Adding brake fluid won’t correct a
leak. If you add fluid when your linings are worn, then
236

Replaceable Light Bulbs
Application Number
Exterior
Cornering ........................... 1156
Headlight
High Beam
......................... 9005
Low Beam ......................... 9006
Marker
............................... 194
Park
.............................. 194NA
Park/Turn
......................... 2057NA
Backup
............................. 1156
High Level Stop
..................... S1156
. License ............................... 194
Marker
............................... T24
Stop/Turn/Tail
........................ 2057
Tail
................................. 194
Application Number
Interior Illumination
Ashtray .............................. 161
DoorCourtesy
........................ 161
Door Warning ......................... 161
Engine Compartment
..................... 89
Footwell Courtesy
...................... 168
Glovebox
............................. 194
Overhead Courtesy/Reading
............ t5582
Rear Console Courtesy ................ t5560
Rear Quarter Courtesy ................ 12864
Trunk
.............................. 51004
Vanity Mirror ......................... 124

IMPORTANT:
KEEP ENGINE OIL
AT THE PROPER
LEVEL AND CHANGE AS
RECOMMENDED
This part covers the maintenance required for your Buick. Your vehicle needs these services to retain its
safety, dependability and emission control performance.
Plan
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 choose to
have their maintenance work done. Your dealer can be
relied upon to use proper parts and practices.

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:
0
0
0
carry passengers and cargo within recommended
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.
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 (6 km).
0. 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 delivery, or in stop-and-go traffic).
0 You operate your vehicle in dusty areas.
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.
273

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).
0 When most trips are less than 10 miles (16 kilometers) and outside temperatures remain below fieezing.
0 When most trips include extended idling and/or frequent low-spee\
d operation as in stop-and-go traffic.
0 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
(See Explanation of
Scheduled Maintenance
Services Following
Schedules
I and n)
Item No.
1. Engine Oil & Oil Filter
Change*
2. Chassis Lubrication
3. Throttle Body Mounting
Bolt Torque*
4. Tire
& Wheel Inspection &
Rotation
5. Engine Accessory Drive Belt(s) Inspection*
6. Cooling System Service*
WHEN TO PERFORM
Miles (kilometers) or Months, Whichever MILES (000)
Occurs First
k
Every 3 000 mi. (5000 km)
or 3 months. , I
Every other oil change
At
6 000 mi. (10 000 km)
only
I
At 6 000 mi. (10 000 km) and
then every
15 000 mi. (25 000
km) or as necessary I
Every 30 000 mi.
(50 000 km) or 24 months.
KILOMETERS (000)
30 35
00
0
0
..
45 50 55
000
0
0
65 70
00
0
274