engine PONTIAC BONNEVILLE 1994 Workshop Manual

NOTICE:
In cold weather, water can freeze
and crack the engine, radiator,
heater core and other parts. Use the
recommended coolant. When
the coolant
in the coolant recovery
tank
is at or above the “FULL COLD’
mark, start your vehicle.
If the overheat warning continues, there’s
one more thing you can try.
You can add
the proper coolant
mix directly to the
radiator
but be sure the cooling system is
cool before you do it.
179.
C
ProCarManuals.com

4. Then fill the coolant recovery tank to
the
“FULL COLD” mark.
5. Put the cap back on the coolant
recovery tank, but leave the radiator
pressure cap
off.
6. Start the engine and let it run until you
can feel the upper radiator hose
getting hot. Watch out for the engine
fan.
7. By this time the coolant level inside
the radiator filler neck may be €ower.
If the level is lower, add more
of the
proper mix through the filler neck
until the level reaches the base of the
filler neck.
181 ...
ProCarManuals.com

Fuel
The 8th digit of your Vehicle
Identification Number (VIN) shows the
code letter for your engine.
You will find
the
VIN at the top left of your instrument
panel. (See “Vehicle Identification
Number”
in the Index.)
3800 Engine (Code L):
Use regular unleaded gasoline rated at 87
octane or higher. It should meet
specifications ASTM D48 14
in the U.S.
and CGSB 3.5-92 in Canada. These fuels
should have the proper additives,
so you
should not have to add anything to the
fuel. In
the
U.S. and Canada, it’s easy to be
sure you get the right kind
of gasoline
(unleaded). You’ll see
“UNLEADED”
right on the pump. And only unleaded
nozzles will fit into your vehicle’s filler
neck.
Be sure the posted octane is at least 87. If
the octane is less than 87, you may get a
heavy knocking noise when you drive. If
it’s bad enough, it can damage your
mgine.
[f you’re using fuel rated at 87 octane
or
higher and you still hear heavy knocking,
your engine needs service. But don’t
worry if you hear a little pinging noise
when you’re accelerating or driving up a
hill. That’s normal, and you don’t have to
buy a higher octane fuel to get rid of
pinging. It’s the heavy, constant knock
that means you have a problem.
3800 Supercharged Engine (Code 1):
Use premium unleaded gasoline rated at
91 octane or higher.
You may use middle
grade or regular unleaded gasolines, but
your vehicle may not accelerate as well.
The gasoline you use should meet
specifications ASTM D4814
in the U.S.
and CGSB 3.5-92
in Canada. These fuels should
have the proper additives,
so you
should not have to add anything to the
fuel.
In the U.S. and Canada, it’s easy to be
sure you get the right kind of gasoline
(unleaded). You’ll see
“UNLEADED”
right on the pump. And only unleaded
nozzles will fit into your vehicle’s filler
neck.
Be sure the posted octane for premium is
at least 91 (at least 89 for middle grade
and 87 for regular). If the octane is.less
than
87, you may get a heavy knocking
noise when you drive. If it’s bad enough,
it can damage your engine.
If you’re using fuel rated at 9
1 octane or
higher and you still hear heavy knacking,
your engine needs service. But don’t
worry
if you hear a little pinging noise
when you’re accelerating
or driving up a
hill. That’s normal and you don’t have to
buy a higher octane fuel
to get rid of
pinging. It’s the heavy, constant knock
that means you have a problem.
What about gasoline with blending
materials that contain oxygen
(oxygenates), such as MTBE or alcohol?
ProCarManuals.com

Service & Appearance Care
MTBE is “methyl tertiary-butyl ether.”
Fuel that is no more than 15% MTBE is
fine
for your vehicle.
Ethanol is ethyl or grain alcohol.
Properly-blended fuel that is no more
than
10% ethanol is fine for your vehicle
Methanol is methyl or wood alcohol.
NOTICE:
Fuel that is more than 5% methanol
is bad for your vehicle. Don’t use it.
It can corrode metal parts
in your
fuel system and also damage plastic
and rubber parts. That damage
wouldn’t be covered under your
warranty. And even at
5% or less,
there must be “cosolvents” and
corrosion preventers
in this fuel to
help avoid these problems.
Gasolines for Cleaner Air
Your use of gasoline with deposit control
additives will help prevent deposits from
forming in your engine and fuel system.
That helps keep your engine
in tune and
your emission control system working
properly. It’s good for your vehicle, and
you’ll be doing your part for cleaner air.
Many gasolines are now blended with
oxygenates. General Motors recommends
that you use gasolines with these blending
materials, such as MTBE and ethanol. By
doing so, you can help clean the air,
especially
in those parts of the country
that have high carbon monoxide levels.
In addition, some gasoline suppliers are
now producing reformulated gasolines.
These gasolines are specially designed to
reduce vehicle emissions. General Motors recommends that you use reformulated
gasoline. By doing
so, you can help clean
the air, especially
in those parts of the
country that have high ozone levels.
You should ask your service station
operators
if their gasolines contain deposit
control additives and oxygenates, and if
they have been reformulated to reduce
vehicle emissions.
r
Countries
If you plan on driving in another country
outside the
U.S. or Canada, unleaded fuel
may ‘be hard to find.
Do not use leaded
gasoline. If you use even one
tankful, your
emission controls won’t work well
or at
all. With continuous use, spark plugs can
get fouled, the exhaust system can corrode,
and your engine
oil can deteriorate quickly.
Your vehicle’s oxygen sensor
will be
damaged. All of that means costly repairs
that wouldn’t be covered by your warranty.
To check on fuel availability, ask an auto
club,
or contact a major oil company that
does business
in the country where you’ll
be driving.
. . 196
ProCarManuals.com

3800 Engine (CODE L)
When you open the hood, you'll see:
1. Engine Coolant Recovery Tank
2. Power Steering Fluid Reservoir
3. Automatic Transaxle Fluid Dipstick
4. Brake Fluid Reservoir
5. Windshield Washer Fluid Reservoir
6. Air Cleaner
7. Engine Oil Dipstick
8. Engine Oil Fill Cap
9. Radiator Pressure Cap
10. Battery I. .. I I 5 ;;$ " :. 1. ,.:.;
201 ..*
ProCarManuals.com

Service & Appearance Care
. 0 202
3800 SC Engine (CODE I)
When you open the hood, you’ll see:
1. Engine Coolant Recovery Tank
2. Automatic Transaxle Fluid Dipstick
3. Power Steering Fluid Reservoir
4. Brake Fluid Reservoir
5. Windshield Washer Fluid Reservoir
6. Air Cleaner
7. Engine Oil Dipstick
8. Engine Oil Fill Cap
9. Radiator Pressure Cap
lo. Battery
ProCarManuals.com

n
D
~~ ~~~ ~~ ~ ~~~~ ~ ~ ~
Engine Accessory Belt
The 3800 (L27) engine uses an engine
accessory belt. This diagram shows the
features connected by the belt routing.
See “Maintenance Schedule’’
in the Index
for when to check the belt.
A. Power Steering
B. Crank
C. Coolant Pump
D. Air Conditioning
E. Alternator
F. Tensioner
3800 Supercharged
(L67) Engine (OPTION)
Your Bonneville may have a 3800
Supercharged engine. The Supercharger is
a device which is designed to pump more
air into the engine than
it would normally
use. This air mixed
with fuel, creates
increased engine power. Since the
Supercharger is a pump and is driven
from an engine accessory drive belt,
increased pressure is available at all
driving conditions, The Powertrain Control
Module
(PCM),
works with a vacuum control to regulate
the increased pressure required during
specific driving conditions. When this
increased pressure or boost is
not desired,
such as during idling and light throttle
cruising, the excess air that the
’
Supercharger is pumping is routed,through
a bypass. All of these controls, working
together provide high performance
character and fuel efficiency
in the3800
V6 Supercharged engine.
The power steering pump uses a Remote
reservoir mounted on the throttle wd
cruise control cable bracket. See
“Maintenance Schedule”
in the Index for
when you should check the fluid:
ProCarManuals.com

Service & Appearance Care
F
1.
2.
A.
B.
C.
D.
E.
E
Front Belt
Back belt
Generator
Power Steering Pump
Crank Supercharger
Coolant Pump
Air Conditioning
tngine Accessory Belt
‘he Supercharged 3800 engine uses two
ccessory drive belts. One belt drives the
enerator and the power steering pump.
‘he second belt drives the supercharger,
oolant pump and air conditioning
ompressor. Each belt has its own
msioner and idler pulley.
. . 204
See “Maintenance Schedule” in the Index
for when to check the accessory drive
belts and Supercharger oil level. Have
your dealer check the oil level in the
Supercharger.
Supercharger Oil
Unless you are technically qualified and
have the proper tools, you should let your
dealer or a qualified service center
perform this maintenance.
When to Check
Check oil level every 30,000 miles
(50 000 km) or every 36 months.
What Kind of Oil to Use
See “Recommended Fluids and
Lubricants” in the Index and use only the
recommended oil.
How to Check and Add Oil
Check oil only when the engine is cold.
Allow the engine to cool
2 to 3 hours after
running.
ProCarManuals.com

WIRING HARNESS SHIELD I
Remove the wiring harness shield.
Clean the area around the oil
fill plug
before removing it.
Remove the oil fill plug using a
3/16
Allen wrench.
The oil level is correct when
it just
reaches the bottom of the threads
of
the inspection hole.
Replace the oil plug with the O-ring
in place. Torque to
10 Nom (88 Ib. in.)
Replace the wiring harness shield.
I
I
tl
Y
r
6
1f
I1
e
a
LC
a
CHECK OIL
LEVEL
Engine Oil
f the “CHECK OIL LEVEL” light on
he instrument panel comes on,
it means
‘ou need to check your engine oil level
ight away. For more information, see
CHECK OIL LEVEL” light
in the
ndex.
You should check your engine oil
:vel regularly; this is an added reminder.
t’s a good idea to check your engine oil
very time you get fuel. In order
to get an
ccurate reading, the oil must be warm
nd the vehicle must be on level ground. Turn off the engine and
give
the oil a few
minutes to drain back into the
oil pan. If
you don’t, the oil dipstick might not show
the actual level.
To Check, Engine Oil ., I’ .
Pull out the dipstick and clean it %with a
paper towel or cloth, then push
it back in
all the way. Remove
it again, keeping the
tip lower, and check the level.
r
205 .
ProCarManuals.com

Service & Appearance Care
When to Add Oil
If the oil is at or below the ADD line, then
you’ll need to add some oil. But you must
use the right kind. This section explains
what kind of oil to
use. For crankcase
capacity,
see “Capacities and
Specifications” in the Index.
, . .206
NOTICE:
Don’t add too much oil. If your
engine has
so much oil that the oil
level gets above the cross-hatched
area that shows the proper operating
range, your engine could be
damaged.
Just fill it enough to put the level
somewhere in the proper operating range.
Push the dipstick all the way back in
when you’re through.
What Kind of Oil to Use
Beginning midyear 1993, oils of the
proper quality for
your vehicle will be
identified with this new “starburst”
symbol. The “starburst” symbol indicates
that the oil has been certified by the
American Petroleum Institute (API), and is suitable for use
in your gasoline engine.
You should look for this on the front of
the
oil container, and use only oils that
display this new symbol.
You should also use the proper viscosity
oil for your vehicle,
as shown in the
following chart:
ProCarManuals.com