engine BUICK SKYLARK 1993 Repair Manual

To Add Coolant: If you need more coolant, add the
proper mix at the surge tank, but only when the engine is cool.
A CAUTION:
Turning the surge tank pressure cap when the
engine and radiator are hot can allow steam and
scalding liquids to blow out and burn you badly.
Never turn the surge tank pressure cap
-- even a
little
-- when the engine and radiator are hot.
I
I
1 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.
1
Surge Tank Pressure Cap
pressure-type cap and must be tightly installed
When you replace your surge tank pressure cap, a GM
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
ACS thermostat
is recommended.
233

Power Steering Fluid What to Add:
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. Refer
to the Maintenance Schedule
to determine what
kind
of fluid to use. See “Recommended Fluids and
Lubricants”
in the Index.
234

1 Brake Master Cylinder
Your brake master cylinder is here. It is filled with
1 DOT-3 brake fluid. 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
you’ll have too much fluid when you get new brake
linings.
You should add (or remove) brake fluid, as
necessary, only when work is done
on the brake
hydraulic system.
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, and your
vehicle could be damaged. Add brake fluid only
when work is done on the br,
e hl ‘raulic
system.
1
There are only two reasons why the brake fluid level in
your master cylinder might go down. The first is that the
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 When your brake fluid falls to a low level, your brake
warning light will come on. See “Brake System Warning
Light’’
in the Index.
What to Add:
When you do need brake fluid, use only DOT-3 brake
fluid
-- such as Delco Supreme and regular 11 (GM part
#1052535). Use new brake fluid from a sealed container only.
I
236

Vehicle Identification Number (VIN)
1111 11111 11. II I I 111 I II 11111 111 I11111 111 IIIIIIIIII II 1111 Ill II
ENGIME A3 t AQEMBLY
CODE MODEL YEAR. PLANT
This is the legal identifier for your Buick. It appears on
a plate in the front corner of the instrument panel, on the
driver’s side. You can see it if you look through the
windshield from outside your vehicle. The
VIN also
appears on the Vehicle Certification and Service Parts
labels and the certificates of title and registration.
Engine Identification
The eighth character in your VIN is the engine code for
your
GM engine. This code will help you identify your
engine, specifications, and replacement parts in this
section.
Service Parts Identification Label
You’ll find this label on the deck lid. It’s very helpful if
you ever .need to order parts. On this label is:
0 Your VIN.
0 Its model designation.
0 Paint information.
0 A list of all production options and special
Be sure that this label is not removed from the vehicle. equipment.
Add-on
Electrical Equipment
257

~~ Fuse Usage
Amp Description
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21. 10
20
20
15
5
5
10
15
15
25
10
20
20
20
30
25 15
20
30
20
20 PRNDL
F/P INJ
STOP HAZ
CTSY
RKE
INST LPS
GAUGES
HORN
ALARM HTR-A/C
RDO IGN
TURN DR LK
TAIL LPS
WDO
WIPER
ERLS
FTP
ACC
IGN ECM HDLP Backup Lamps, Electronic PRNDL Display
Fuel Pump, Fuel Injectors
Stop Lamps, Hazard Flashers
Trunk Lamp,-Door Lock Switches, Power Mirrors
(Automatic Transmission Only) Remote Keyless Entry
Instrument Panel Lighting
Gauges, Rear Defog Relay, Antilock Brake Telltale, Brake Transmi\
ssion Shift Interlock
Horn
Multi-Function Alarm Module
Heater, Air Conditioning, Antilock Brakes, Daytime Running Lamps \
(Canada), Computer Controlled Ride
Radio Power, Cruise Control
Turn Signals
Power Door Lock Relay
.Tail Lamps, Marker Lamps, License Lamps (Circuit Breaker) Power Windows
Windshield Wipers Engine controls
Flash-to-Pass
(U.S. Only)
(Circuit Breaker) Rear Window Defogger, Power Door Locks, Powe\
r Seats, Power Antenna
Ecm, Ignition System (Circuit Breaker) Headlamps
259

. Capacities and Specifications
Engine Code D1 (L40)2 2.3L L-4 (QUAD 4) OHC
Belt Tensions -
Front crankbelt: automatically controlled by an
idler pulley. Tension adjustment should never be
ncessary. Power steering:
450 Newtons
Cooling System Capacity -
10.4 quarts/9.8 liters
Crankcase Capacity -
4 quarts/3.8 liters
Air Conditioning Capaeity(Rl2)4 -
2.63 lbs. (1.19 kilograms)
Fuel Tank Capacity -
15.2 gallons/57.5 liters
Transaxle, Automatic -
Capacity 4 quarts/3.8 liters
Maintenance Item Part Numbers3
Air Filter - AI 172C
Fuel Filter
- GF578
Oil Filter
- PF1225 or PF47
PCV Valve
- CV899C
Spark Plug
- FR3LSK, GAP 0.035”
~~~~
1 8th Character of the Vehicle Identification Number.
z Made in a GM plant in the United States.
3 Part numbers are AC type.
4 Air Conditioning Refrigerant - Not all air conditioning refrigerants are the same. If the air conditioning system in your
vehicle needs refrigerant, be sure the proper refrigerant
is used. If you’re not sure ask your Buick dealer.
263

Capacities and Specifications
Engine Code N1 (LG7)2 3.3L L-6 MFI 3300
Belt Tensions -
Automatically controlled by a self-tensioning idler
pulley. Tension adjustment.should new be
necessary.
Cooling System Capacity -
13 quarts/l2.5 liters
Crankcase Capacity -
4 quarts/3.8 liters
Air Conditioning Capacity(R12)d -
2.63 lbs. (1.19 kilograms)
Fuel Tank Capacity -
Transaxle -
15.2 gallons/57.5 liters
Capacity
4 quartd3.8 liters
Maintenance Item Part Numbers3 -
Air Filter - A974C
Fuel Filter
- GF48 1
Oil Filter - PF40
PCV Valve
- CV899C
Spark Plug
- 41-600, GAP 0.060”
1 8th Character of the Vehicle Identification Number.
2 Made in a GM plant in the United States.
3 Part numbers are AC type.
4 Air Conditioning Refrigerant - Not all air conditioning refrigerants are the same. If the air conditioning system in your
vehicle needs refrigerant, be sure the proper refrigerant
is used. If you’re not sure ask your Buick dealer.
264

IMPORTANT:
KEEP ENGINE OIL
AT THE PROPER
LEVEL AND CHANGE
AS
RECOMMENDED ,?.j :i i
Protection
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.
266

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
0
schedule to follow: 0
Schedule I
Is any one of these true for your vehicle?
0 Most trips are less than 4 miles (6 km).
Most trips are less than 10 miles (16 km) when
outside temperatures are below freezing.
0 The engine is at low speed most of the time (as in
door-to-door delivery,
or in stop-and-go traffic).
You operate your vehicle in dusty areas.
You tow a trailer. (With some models, you shouldn’t
ever tow a trailer. See “Towing a Trailer” in the
Index.
)
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.
269

I
b 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 freezing.
0 When most trips indude extended idling and/or frequent low-speed operation as in stop-a\
nd-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 app\
lications.
TO BE SERVICED
(See Explanation of
Scheduled Maintenance Miles (kilometers) or
Services Following Months, Whichever
WHEN
TO PERFORM
Schedules I and 10
Item No. I
Occurs First
1. hgine
Oil & Filter Change months I
Every 3000 mi. (5000 km) or
2. Chassis Lubrication I Every other oil change
3. Throttle Body Mounting At 6 000 mi. (10 000 km)
Bolt Torque*
At
6 000'mi. (10 000 km) and
km) or as necessary
4. Tire & 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)
3 16 19 112115118121124127130(33136139142145148
5 10
a.
..
0
0
KILOMETERS (000)
65 70 75 80
a...
0 a
270