engine PONTIAC BONNEVILLE 1995 Repair Manual

Engine Accessory Belt
A
C
The 3800 (L36) 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 . Alternator
C. Air Conditioning
D. Crank
E. Coolant Pump
E 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 the
3800 V6 Supercharged engine.
The power steering pump uses a remote reservoir
mounted on the throttle and cruise control cable bracket.
See “Maintenance Schedule”
in the Index for when you
should check the fluid.
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Engine Accessory Belt coolant pump and air conditioning compressor. Each
belt has its own tensioner and idler pulley.
1. Front Belt C. Crank
2. Back Belt D. Supercharger
A. Alternator
E. Coolant Pump
B. Power Steering E Air Conditioning
The Supercharged
38800 engine uses two accessory drive
belts. One belt drives the generator and the power
steering pump. The second belt drives the supercharger, 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.
Engine Oil
CHECK OIL
LEVEL
If the CHECK QIL LEVEL light on the instrument
panel comes
on, it means you need to check your engine
oil level
right away. for more information, see “Check
Oil Level Light” in
the Index. You should check your
engine
oil level regularly; this is an added reminder.
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It’s a good idea to check your engine oil every time you
get fuel.
In order to get an accurate reading, the oil must
be
warm and the vehicle must be on level ground.
~ The engine oil dipstick
is directly behind the
i engine fan area.
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
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 down, and check the level.
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
part explains what kind of oil to use.
For crankcase
capacity, see “Capacities and Specifications” in the
Index.
t
I 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.
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What Kind of Oil to Use
Oils of the proper quality for your vehicle can be
identified by looking for the “Starburst” symbol. The
“Starburst” symbol indicates that
the oil has been
certified by the American Petroleum Institute (API), and
is preferred for use in your gasoline engine.
**
L
t
t L
4
If you change your own oil, be sure you use oil that has
the “Starburst” symbol on the front of the oil container.
If you have your oil changed for you, be sure the oil put
into your engine is American Petroleum Institute
certified for gasoline engines.
You should also use
the proper viscosity oil for your
vehicle,
as shown in the following chart:
~
RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS
FOR BEST FUEL ECONOMY AND COLD STARTINB, SELECT THE LOWEST
SAL VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE.
HOT
WEATHER 7
“C
+ 38
+ 27
+ 16
t4
-1
- 18
M
LOOK
FOR THIS 1
SYMBOL
I E ERRRED 1OW-30
mve 0°F (-1 8°C)
WEATHER
DO NOT USE SAE 2OW.50 OR ANY OTHER GRADE OIL NOT RECOMMENDED
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As shown in the chart, SAE 1OW-30 is best for your
vehicle. However, you can use
SAE 5W-30 if it’s
going to be colder than
60” F ( 16” C) before your
next oil change. When it’s very cold,
you should use
SAE 5W-30. These numbers on an oil container show
its viscosity, or thickness. Do not use other viscosity
oils, such as
SAE 20W-50.
NOTICE:
Use only engine oil with the American Petroleum
Institute Certified For Gasoline Engines
“Starburst” symbol. Failure to use the proper
oil
can result in engine damage not covered by your
warranty.
GM Goodwrench@ oil (in Canada, GM Engine Oil)
meets all the requirements for your vehicle.
Engine Oil Additives
Don’t add anything to your oil. Your Pontiac dealer is
ready to advise
if you think something should be added.
When to Change Engine Oil
See if any one of these is true for you:
Most trips are less than 5 to 10 miles (8 to 16 km).
This is particularly important when outside
temperatures are below freezing.
0 Most trips include extensive idling (such as frequent
driving in stop and go traffic).
Most trips are through dusty areas.
@ You frequently tow a trailer or use a carrier on top of
If any one of these is true for your vehicle, then you
need to change your oil and filter every
3,000 miles
(5 000 km) or 3 months -- whichever comes first.
(See “Change Oil Indicator” in
the Index.)
If none of them is true, change the oil and filter every
7,500 miles (12 500 km) or 12 months -- whichever
comes first. your vehicle.
Engine Coolant Heater
An
engine coolant heater can be a big help if you have
to park outside in very cold
weather, 0°F (- 18°C) or
colder. If your vehicle has this option, see “Engine
Coolant Heater” in the Index.
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What to Do with Used Oil
Did you how that used engine oil contains certain
elements that may be unhealthy for your skin and could
even cause cancer? Don’t let used oil stay on your
skin
for very long. Clean your skin and nails with soap and
water, or a good hand cleaner. Wash or properly throw
away clothing or rags containing used engine
oil. (See
the manufacturer’s warnings about the use and disposal
of oil products.)
Used oil can be a real threat to the environment. If you
change your
own oil, be sure to drain all free-flowing oil
from the filter before disposal. Don’t ever dispose of oil
by putting it in the trash, pouring it on the ground, into
sewers, or into streams or bodies of water. Instead,
recycle
it by taking it to a place that co’llects lased oil. If
you have a problem properly disposing of your used oil,
ask your dealer, a service station or
a local recycling
center for help.
Air Cleaner
Refer to the Maintenance Schedule to determine when to
replace the air filter.
See “Scheduled Maintenance Services”
in the Index.
NOTICE:
If the air cleaner is off, a backfire can cause a
damaging engine &e. And, dirt can eady get
into your engine,
which will damage it. Always
have the air cleaner in place when you’re driving.
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To Check or Replace
I. Unscrew the three wing screws in the housing cover
and pull back.
If you have the 3800 Supercharged engine, unsnap
the three clips holding the air cleaner housing cover
and pull apart.
2. Unscrew the clamp on the air intake hose where the
hose attaches
near the top of the engine. Detach the
hose, then pull back the rear
of the housing cover.
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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.
1. Remove the wiring harness shield.
2. Clean the area around the oil fill plug before
removing it.
3. Remove the oil fill plug using a 31 16 Allen wrench.
4. The oil level is correct when it just reaches the
bottom
of the threads of the inspection hole.
5. Replace the oil plug with the O-ring in place. Torque
to
10 Nom (88 lb. in.).
6. Replace wiring harness shield.
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Automatic Transaxle Fluid
When to Check and Change
A good time to check your automatic transaxle fluid level
is when the engine oil is changed. Refer to the
Maintenance Schedule to detemrrine 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 your Pontiac dealer 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.
NOTICE:
Too much or too little fluid can damage your
transaxle.
Too much can mean that some of the
fluid could come out and fall
on hot engine parts
or exhaust system parts, starting a fire. Be sure to
get an accurate reading if you check your
transaxle fluid.
~~~
Wait at least 30 minutes before checking the transaxle
fluid level
if you have been driving:
0 When outside temperatures are above 90" F (32°C).
At high speed for quite a while.
In heavy traffic - especially in hot weather.
0 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 93 "C).
Get the vehicle warmed up by driving about €5 des (24 km)
when outside temperatures are above 50°F (10°C). If it's
colder
than 50°F (lO"C), you may have to drive longer.
To check the fluid level
1. Park your vehicle on a level place. Keep the engine
running.
2. With the parking brake applied, place the shift lever
in PARK (P).
3. With your foot on the brake pedal, move the shift
lever through each gear range, pausing for about
three seconds
in each range. Then, position the shift
lever in PARK (P).
4. Let the engine run at idle for three to five minutes.
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‘Then, without shutting off the engine, follow these
steps:
L A
1.
2.
Pull out the
dipstick and wipe it
with a clean rag
or
paper towel.
Push it back in
all
the way, wait three
seconds and then
pull it back out again.
3. Check both sides of the dipstick, and read the lower
level. The fluid level must be
in the cross-hatched area.
4. If the fluid level is in the acceptable range, push the
dipstick back in all the way.
How to Add Fluid
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.
1. Pull out the dipstick.
2. Using a long-neck funnel, add enough fluid at the
dipstick hole to bring it to the proper level. It doesn’t
take much fluid, generally
less than a pint (13.52).
Don ’t overfill. We recommend you use only fluid
labeled
DEXRON@-111, because fluid with that label
is made especially for your automatic transaxle.
Damage caused by fluid other than DEXRON@-111
is not covered by your new vehicle warranty.
0 After adding fluid, recheck the fluid level as
0 When the correct fluid level is obtained, push the
described under
“How to Check.”
1 I dipstick back in all the way.
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