air conditioning BUICK PARK AVENUE 1994 Owners Manual

If your Buick has the Dual Automatic ComforTemp
Climate Control option,
it looks like this: The air conditioning compressor operates
when
the
outside temperature is above 45°F (7°C). Besides
cooling, this is used to dehumidify and filter
the air. The
compressor works when AUTO, HTR, DEFOG or
defrost is selected.
The following information
tells you how it works.
You
will hear a beep each time a button is pushed. The
display
will show fan, temperature and mode settings.
Sun and temperature sensors automatically adjust air
temperature to maintain your comfort. The system tends
to supply cooler air to the side towards the sun. Be
careful not to put anything over the sun sensors on the
top
of the dash. The system may not respond correctly.
Ext Temp
Push this button and the
display will indicate the
outside temperature (unless
the system
is OFF). Push it
again to return to the
regular system display.
.. * '' I
The outside temperature reading is most accurate when
driving. During stops, the display shows
the previous
temperature for best accuracy and system control.
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Fan Speeds Air Conditioner
The fan control is used
to select the speed of the blower
fan. There are four speeds to choose from. Moving the
lever to the right or
left will increase or decrease the fan
speed. The fan will be off when the system is
off.
Temperature
The lower lever changes the temperature of the air
coming through your air outlets. Moving the lever
between
COOL and WARM will raise or lower the
temperature.
Off
When the system is off, the ventilation system will allow
air to
flow through your Buick when the vehicle is
moving. The system will try to keep the air at the chosen
temperature, unless
it is very hot or very cold outside.
When the system is off, the blower fan is also off. The
next three selections cool the air. The air
conditioner won’t work well unless all the windows are
closed. On very hot days, open the windows long
enough to let the hot inside air out. This reduces the
amount of work your air conditioner’s compressor
will
have to do, which should help fuel economy.
The air conditioning compressor operates
in all Air
Conditioning positions and
the Defrost position when
the outside temperature
is above 47°F (SOC).
Selecting OFF, VENT or HTR turns off the air
conditioning compressor.
When you don’t need to cool the outside air, use the
VENT, HEAT and DEFROST settings. Adjust the
temperature control for comfort. You’ll get better fuel
economy (gas mileage)
if you’re not cooling the outside
air. When you cool the air, your engine runs a
refrigeration compressor, and
it has to work a little
harder.
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Before closing the hood, be sure all the filler caps are on
properly. Then pull the hood down and close it firmly.
Engine Accessory Belt
A
D
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
E Tensioner
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3800 Supercharged (L67) Engine
(Option)
Your Park Avenue Ultra has a 3800 Supercharged
engine. Buick chose supercharging rather than
turbocharging because Buick emphasizes smooth,
refined power.
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 Buick 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.
Engine Accessory Belt
The Supercharged 3800 engine uses two accessory drive
belts. One belt drives the generator and the power
steering pump. The second belt drives the supercharger,
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. Generator
E. Coolant Pump
B. Power Steering Pump E Air Conditioning
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Capacities and Specifications
~~~ ~ ~~~~~
Engine Code L (L27) 3.8L V-6 SF1
Engine Code 1 (L67) 3.8L V-6 SF1
Belt Tensions -
Automatically controlled by a Self-Tension idler
pulley. Tension adjustment should never be
necessary.
Cooling System Capacity -
Crankcase Capacity -
With air conditioning: 13 quarts/l2.5 liters
4 quarts/3.8 liters (oilchange without filter) 5 quarts/4.75 liters (oilchange with filter change)
R134a
- 2.2 lbs. (.99 kilograms)
Air Conditioning Capacity -
Fuel Tank Capacity -
18.0 gallons/68 liters
Transaxle -
Drain & Refill - 6 quarts/5.6 liters
Maintenance Item Part Numbers -
Air Filter - A 1096C
Fuel Filter - GF580
Oil Filter
- PF47
PCV Valve
- CV892C
Radiator Cap
- RC27
Spark Plug
- 41-601, GAP 0.060”
Air Conditioning Refrigerants 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.
For additional information, see your “Warranty and Owner Assistance Information” booklet.
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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 the pressure cap and neck.
To help ensure proper operation, we recommend a
pressure test of both the cooling system and the
pressure cap.
6.
Transaxle Service -- Change both the fluid and filter
every
15,000 miles (25 000 km) 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.
0 In hilly or mountainous terrain.
0 When doing frequent trailer towing. (With some
models, you shouldn’t ever tow a trailer. See
“Towing a Trailer”
in the Index.)
0 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 ( 160 000 km).
7. Spark Plug Replacement* -- Replace spark plugs
with the proper type. See “Specifications Chart”
in
the Index.
8. Spark Plug Wire Inspection*-f -- Inspect for burns,
cracks or other damage. Check the boot
fit at the
distributor and at the spark plugs. Replace wires as
needed.
9. Supercharger Oil Check--Check oil every 30,000
(50 000km) or 36 months. Check oil level only on
cold engine. Add the proper synthetic oil. See
“Recommended Fluids and Lubricants” in the Index.
10. Air Cleaner Filter Replacement* -- Replace every
30,000 miles (50 000 km) or more often under dusty
conditions. Ask your dealer for the proper
replacement intervals for your driving conditions.
1 1. Fuel Tank, Cap and Lines Inspection*? -- Inspect
fuel tank, cap and lines (including fuel rails and
injection assembly) 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.
* An Emission Control Service.
-f The US. 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”.
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