heater CHEVROLET MONTE CARLO 1981 4.G Owners Manual

Downloaded from www.Manualslib.com manuals search engine Steady Cruising Speeds
Once you reach cruising sPeed, keep as steady a speed as road and traffic will allow . Speeding up and slowing down lessens your vehicle's efficiency and uses more fuel.
Stop-And-Start Driving
Frequent stops and starts while driving cut down on your miles per gallon
(kilometers per liter) . Plan even your short shopping trips to take advantage of
through streets to avoid traffic lights. Pace your driving
like the expert drivers
to avoid unneeded stops and braking .
Sudden Stops
Sudden stops can also waste fuel; instead of moving the vehicle, the energy of fuel is wasted as heat in braking. Energy in the fOrm of fuel is also needed to
accelerate
baCk to driving speed.
Excessive Idling
An idling engine uses fuel, too .. If you're faced with more than a minute wait,
and you're not in traffic , it may be better to turn off the engine and start again
later.
Lubricants
A well-lubricated vehicle means less friction between moving parts. See the Maintenance Schedule folder for the proper lubrication intervals.
Air Cleaner
Your vehicle receives its power from a mixture of fuel and air. The air enters
the engine through the air cleaner. A dirty air cleaner element lessens engine
perfOrrnance and can waste/Uel. ,So, it's important to replace the air cleaner
element (filter) at the intervals in Section C of the Maintenance Schedule folder .
Wind Drag
Open windows at high speeds cause "wind drag" which can lessen fuel
economy. Also, fuel economy is less when driving in crosswinds or headwinds .
To
help offset some of this loss, slow down when driving in these conditions.
Air Conditioner
" your vehicle has an optional air conditioner , use the "Economy, " ("Vent" or
"Heater") positions whenever possible. The air conditioner compressor, is not on in these positions and the reduced ,'engine-load can improve fuel economy.
Engine Maintenance
An engine that i. properly maintained ."iill provide better fuel economy than one
that is no\.
One misfiring spark plug will cut .fuel economy quite a bit, and will make a difference in the amount of pollution emitted from yOur vehicle.
Exces~ Weight
Fuel economy is related to the work. the engine must do. The heavier the load,
the more fuel it takes to run your vehicle. Keep weight to a minimum by taking
out any luggage or cargo when it is not needed.
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Downloaded from www.Manualslib.com manuals search engine ~
OSTANDARD OOPTIONAL
'"
OPTIONAL
r , ).
1. Fuel Gage 2. Warning Lights 3. Speedometer 4. Hi-Beam Indicotor 5, Odometer 6. Clock 7. Glove Box 8. Wind'shield Wip.r Control 9. Light Switch
10. Rea r Window Defogger Switch 11. Heater and Optionol Air Conditioning Control
m
12. Ashtray 13. Cigarette lighter U. Radio and Control. 1.5. Turn Signal Indicator 16. Tachometer 17, Warning Gages
18. Shift Indicator
19. Check Engine 20 . R.H . Outside Remote Mirror

Downloaded from www.Manualslib.com manuals search engine Oil! Choke Indicator Light
This light will come on to prov~ a "bulb check", when the ignition is turnee
on, but should go out after the engine is startee. If light fails to come on with
ignition turnee on,
it could indicate a bumee -out bulb , a defective electric
choke heater circuit or a
blown instrument lamp fuse. Have system repairee if
light
does not come on during check.
Occasionally, this light may flicker . momentarily while the engine is running but
this will· not harm ,the ' system. However, if the ,light remains on during normal
engine operation , the engine shoutd be stopped until the cause of the
trouble can be Iocatee .andcorrectee. The source of the troubte could be any of the following.
•
Loss of engine oil pressure.
• Blown "Choke Heater" or Gage fuse.
• Loss of electric choke heater vo~age.
NOTICE: Continuing to run the engine with an illuminated oil/choke pressure light can cause serious damage to the engine or unusually high exhaust system temp*'ratures which could resuh in serious d8mage to the vehicte.
Choke Warning Indicator Light
On some vehicles equippec with tlie optional .Oil pressure gage, an amber
choke warning indicator
-light replaces the red oil pressure ' indicator light in the
instrument cluster. If this light comes on, indicating loss of electric choke
heater voltage , have your authorizee
Oealer locate and correct the trouble as
soon as possible.
Generator Indicator Light
The red .light VOLT is designee to come on when the ignition.key is in the "run " pos~ion,bul t>efiJrethe 'engine;;, startee. After the engine starts, the
light should go out and remain oul.
H the light remains on when engine is
running , have your Authorized Dealer locate and correct ' the trouble as soon as
possible .
Engine Temperature Indicator Light
This indicator light is providee .in the instrument cluster to. quickly warn of an
overheated engine. 'With the ignition in the START position, the ree TEMP
indicator (hot light) will light to
let you know that it is operating properly.
When the engine is starlee,
the ree light will go out immediately. tt will light up
at no other time unless for some
reason the engine reaches a dangerously
high operating temperature. Glance .at the instrument cluster freqtJentiyas you
drive, if this light is on see
"Engine Cooing System" on page 3,3.
Brake System Warning Light
The regular braking system is a dual system designee so that one part will
provide some braking action
n there is a loss of hydraulic pressure in the other
part of the system. The system has a "Brake" warning Ught Iocatee in the
instrument · panel.
• To serve as a reminder, the "6RAKE" light is designee to stay on when
the parking brake is not fully released and the ignition key is on.

Downloaded from www.Manualslib.com manuals search engine The reminder chime is actuated only when the ignition -switch is--turned to
"OFF," "LOCK" or "ACCESSORY" position,
When the parking lamps or headlamps are
to be operated with the key in the
OFF position , the reminder chime can be shut off by turning the light switch
knob until the instrument cluster lights are not on.
Electric Clock
Reset the dock by pulling out the knOb and turning the hand s clockwise ~
slow, counterclockwise if fast. This is designed to, if the clock error is five minutes or mo"e~ -automatically --'compensate for time gain or ,lag. Several
resettings, several days apart, may be needed to properly adjust the clock
meChanism.
Cigarette Lighter
The cigarette lighter is located to the right of the heater control. To operate,
. push it in. When it becomes heated, it
automatically pops out ready for use .
Electric Trunk Release
An electric trunk release is available which permrts opening the trunk from'
inside the car. With the ignition key on, pUsh the release button located in the .
glove box.
Always
lock . the glove compartment when leaving the car unattended to prevent unauthorized entry into·tne trurik .
VENTILATION SYSTEM
.• _<, YOUf.,v.~Jc.le (air conditioned Of non -air conditioned) is equipped with a flow­through ventilation system which brings outside air into the vehicle through the
air inlet a
nd exhausts it through the valves in the rear body lock pillars. (See
illustration).
FRONT INLET GRILLE
Basic Operating Tip!!:
• Always keep the front inlet grilles clear of obstructions (leaves, ice, snow ,
etc .) .
2-22

Downloaded from www.Manualslib.com manuals search engine • Always keep the area under the front seat clear for maximum rear seat airflow . .: ,
• For optimum driving comfort in. heating or air conditioning modes keep ", windows . closed. .
•
Clear snow and ice from the hood and air inlet in front of the windshield . This improves heater ahd defroster performance and lowers the chance of
fogging
on the inside of the windshield.
• During winter operation
run the blower on "High" for a few moments
before driving off. This helps clear the Intake ducts of snow and further
lessens the chance of fogging on the insiele of the windshield.
The following pages of this manual proviele more operating tips for getting
maximum heating
and cooling comfort. (AlsO s"" "Engine Exhaust Gas Caution (Carbon Monoxidej"at the beginning of "Starting and Operating ."
Section 2 oHhismanual.)
Lower Air Vents (Non Air Conditioned Vehicle)
Two control handles located beneath the steering colulTYl open (pull) and ciose
(full in) the
lower "ram" air vents . The amount of air discharged at these lower
outlets increases with vehicle speed. Maximum airflow can be obtained by
opening any of the side door windows slightly. If so equipped, the rear quarter SWing-out windows will optimize lower vent performance and provide maximum
airflow without opening a siele dIoor glass. In this condition, mimimum air
buffeting
and road noise is incurred .
HEATER SYSTEM (NON AIR CONDITIONED VEHICLE)
2-23

Downloaded from www.Manualslib.com manuals search engine Fan Lever
The fan;-lever (OFF-HI) provides speed control of the blower fan in all Air
Selector Lever positions.
Temperature Control Lever
The temperature control lever regulates the temperature of the air entering the passenger compartment in all Air Selector lever positions. Full down position
(HOT) provides maximum heat
(ambient air temperature) air.
AIR Selector Lever
• VENT --In this pOSition, minimum heat power. ventilation air is discharged
from the upper air oullets. Air quantity is
controlled by the FAN LEVER.
• BlEND_-The AIR SELECTOR LEVER may be adjusted between VENT and HTR (heater) to obtain a variable distribution of air between the uppe r air
outlets and the floor air outlet
• HTR (Heater )--In this position , most of the .air Is delivered to the floor air
outlet with a small amount deliVered to the windshield (defroster oullets).
The air temperature is
cpntrolled by the TEMPERATURE LEVER while the
air quantity is controlled by the FAN LEVER. This position is used for most winter driving. .
• BlEND--(The AIR SELECTOR LEVER may be adjUsted between HTR
(Heater) and DEF (Defrost) pOSitions to obtain a variable distribution of air
between the floor . air outlet
and the windshield air outlets.
• DEF (Defro st)--In this position , most of the air is delivered to the windshield
• ··-.(defrjl$t"routletS) with a small amount to the floor air outlet
The windsh ield de frost i
ng and defogging system assists in providing good
visibility through designated areas Of the windshield under most inclement
weather conditions. _For immediate operation of the vehicle, the windshield
should be scraped clear.
Operate system for
30 seconds before switching to DEF. This will remove
humid air from the system and minimize
rapid fogging of the glass which can occur jf humid air i s blown onto a cool windshield.
AIR CONDITIONING SYSTEM
This system combines heating and cooling capabilities for comfort in all
weather conditions .
During some air conditioning operating conditions , slight increases and
decreases of engine speedfpower may be noticed . This should be considered
normal as the system is designed to cycle the compressor ON and OFF to
maintain desired cooling. The reduced compressor operation should benefit
fuel economy.
Fan Lever
The Ian lever (LO-HI) provide s speed control of the blower fan in all Air Selector Lever positions except OFF.
Temperature Control Lever
The temperature control lever regulates the temperature of the air entering the
passenger compartment in ALL Air Selector Lever positions.
2-24

Downloaded from www.Manualslib.com manuals search engine Air Selector Lever
The air selector lever regulates air flow from the heater, defroster and air
conditioning outlets. It also controls operation of the refrigeration compressor.
• OFF--In this position the blower doeS not operate . However , when the
vehicle is moving, air will enter the passenger compartment through the floor
air outlet.
• MAX (AIR COND)--Air from the p~ssengercompartment is· mixed with a
small amount of outside air, conditioned and discharged from the upper
outlets. This position with the
temperature lever in full COLD is used for
maximum cooling under conditions
of high temperatu re and humidity .
• NORM (AIR COND) --Outside air is conditioned as it passes through the
system and is discharged from the upper outlets. This position is used for
most air conditioning situations.
• BILEVEL (AIR COND)--Outside air is conditioned and directed out the upper
outlets PlUS the floor air outlet. A small amount of air also flows trom the
windshield defroster outlets.
This position provided comfort and keeps the
windshield clear under low fogging conditions .
• VENT (ECONOMY)--Outsid~,air is discharged from the upper outlets. This position is used in cool. to moderate weather when· conditioned air· is not
required. The air conditioning compressor is turned off.
• HEATER (ECONOMY)-'-Outside air is delivered from the floor air outlets
with a small amount from the windshield defroster outlets. This position is
used for most winter driving. The air conditioning compressor is turned off.
• DEF--Outside air is conditioned and delivered from the windshield defroster
outlets with a smail amount delivered from the floor air outlet. This position
is recommended for conditions
Of severe fogging and icing only.
Air Outlets
The instrument panel air outlets may be rotated or vanes turned to direct air flow in direction' desired.
For additional air flow a lap cooler is provided under the steering column. This outlet has vertical vanes and can be rotated up or down as desired . Under this
lap cooler is an outlet with a control that can
be moved to the IefI or right for
opening and closing , controlling the amount of air
to the floor from the bottom
of the outlet.
ELECTRO-CLEAR REAR WINDOW DEFOGGER
The optional defogger may be turned on after the engine is running by placing
the switch (on the instrument panel) in the
ON postlion . Power is indicated by a
green light. After the defogger has operated for a short time, the system will
automatically
shut off. If further defrosting or defogging is des ired, simply
actuate the switch again.
The defogger will not function if the ignition is off.
2-25

Downloaded from www.Manualslib.com manuals search engine "the "TEMP" light comes on (or, if you have a 900lant temperature gage, the
gage needle goes into the warning zone) and your air conditioner is on, turn it
off.
If the "TEMP" light (or gage) comes on while you are stopped in traffic,
shift the transmission to
"N" (Neutral).
If the "TEMP" light doesn't go off (or the gage needle doesn't start to drop)
within a minute or two:
• Pull over to a safe Place ""d stop the vehicle. Set the parking brake and
shift to "P" (Park) 9r, with a manual transmission, shift to Neutral first, then
set the parking brake.
• DON'T TURN OFF THE ENGINE. INCREASE THE ENGINE SPEED until it
sounds like it's going about twice as fast as normal idle speed. Bring the
idle speed back to normal
after two or three minutes.
tfthe "TEMP" light still doesn't 90 off, (or the gage needle doesn't start to
drop),
NOW TURN OFF THE ENGINE and proceed as follows.
•
lift the engine hood. Look at the coolant level in the "see through" coolant
recovery tank. The coolant level. should be at or above the "Full Cold"
mark on the tank. If it looks like the coolant is boiling, wait until it stops
before proceeding. You should not need to remove the radiator cap to
check the coolant
level and. it can be dangerous if the coolant is still hot. See the following Caution.
CAUTION: To help avoid being burned:
"'-'''''''''i',",,;0-Fc:io'ffi)tcremoy'J~_ c;<)olant recovery tank cap if the coolant is boiling, and
• do not remove -the radiatorc:ap WhilethIit8ngine'-aUid:radiltor a,.Slili hot.
Scalding fluid and steamean be released under pressure it either cap is taken off too soon,
-;<
• If coolant level is low:
•
looklorleaks at the radiator hoses and connections, heater hoses and
connections,
r"diator,and water pump. See that the. fan belts are not
broken or off the pulleys an.d that the fan turns when the engine is started,
•
Add coolant to the recovery tahk.
If
the cQolant level in the recovery tank is althe correct lellel arid the "TEMP"
light (gage) still co"",s.dn,. air may be tr~ in the cooling system, This may
stop coolant from returning to the radiator. In this case, you may have to add
coolant directly to the radiator.
See "Coolant Replacement" under engine
cooling system
in "Service and Maintenance," Section 5 of this manual. Follow
steps 1 and 10. for the correct way to remove the radiator cap and add .coolant
to the radiator.
After the
"TEMP" light is out (or the gage needle is out of the warning zone),
resume driving at a reduced speed. Return to normal driving after about ten
minutes if the light does not come back
on (or the gage needle does not go
back into the warning zone).
3-4

Downloaded from www.Manualslib.com manuals search engine If you have to add coolant more than four times a year (either to the recovery
tank or to the radiator), see your dealer for a cooling system check.
NOTICE: If you use the proper quality antifreeze, there is no· need to add extra inhihitorsor additiveswtlich claim to improve-the system. They may be harmful to the proper operation of the system.
Cooling' System Service
The cooling system should be serviced at the intervals specified in Section A of
the Maintenance Schedule folder as follows:
1. Wash the radiator cap and filler neck with clean water. See step 1 of "Coolant Replacement" for the proper way to remove the radiator cap.
2. Check the coolant level in the radiator and have it tested for freeze
protection.
Add ethylene glycol antifreeze, if needed, to maintain freeze
protection at-3JOC (~$4°f).
3. Have the cooling system and radiator cap tested for a pressure capacity of 105. kPa (15psi). (The pressure cantle anywhere from 95 kPa, or 14 psi,
to 120
kPa, or 18 psi.) If a replacement cap is needed, use an AC cap, or
an equivalent cap, designed fof coolant recovery systems and specffied for
your model.
4. Tighten all radiator hose clamps ang heater hose clamps and inspect all
hoses. Replace the hOSes if they are swollen, "checked" or otherwise worn.
NOTICE: Take care when tightening the hose clamps at the radiator. Overtightening could bend or collapse the radiator fittings.
5. Clean the front of the radiator core and air conditioning condenser to
remove dirt and other objects. Also clean the auxiliary engine oil andlor
transmission fluid cooler if the vehicle has them.
Coolant Replacernent
At the intervals specffied in Section A of the Maintenance Schedule folder, flush
9r1d refill the cooling system as follows:
1. Remove the radiator cap when the engine is cool:
•
Turn the cap slowly to the left until it reaches a "stop." Do not press
down while turning the
cap.
• Wait until any remaining pressure (indicated by a hissing sound) is
relieved, then press down on the cap and continue turning it to the left.
CAUTION: To help avoid the dangarm being burned. donotrem_ove the radiator cap While the engine' and radiator are. still. hot. Scaldingftukland steam ean be blown out under ~re It the cap is taken off too SOOf1.
2. When the cap is removed, run the engine until the upper rad.iator hose is
hot.
(ThiS shows that th~ thermostat is open and the coolant is flowing
through the system.)
3. Stop the engine. Open Ihe,actialor drain valVE! to drain the coolant. Drainage may be speeded by removing the drain plugs in the block, ff so
equipped.
5-7

Downloaded from www.Manualslib.com manuals search engine FUSES AND CIRCUIT BREAKER
The wiring circuits in yoUr 198 -1 Chevrolet are protected from short circuits by
a
combination of fuses, circllit breakers, and fusible thermal links in the
wiring itself. This greatly reduces the hazard of electrically caused fires in the
automobile. The fuse junction block is located under the left side of the
instrument panel .
The headlight
wiring is protected by a circuit bre a ker in the light switch . An
electrical overload
will cause the lights to go on and off, or in some cases to
remain off. If this happens, have your headlight wiring checked right away.
Be sides a fuse , the windshield wiper
motor is also protected by a circuit
breaker .
If the motor overheats, due to over load ing caused by heavy snow,
etc
., the wiper will remain stopped until the motor cools. Be sure to have th';·
cause of the overloading corrected.
Also , a
circuit breaker , on the f~se. panel, protects the power window, power
seat , rear
window defogger (elec.) and oth'9rcircuits when vehicle is so
equipped. Where current load is too heavy , the circuit breaker intermittently
opens and. c loses , protecting the circu it until the cause is found and
eliminated.
Fuses, located in th .e Junction Block beneath the dash on the
driver'S side are:
Fuses
Instrument Lamp , Heater Dial, Audio Alarm ........................ 5 Amp
Electronic Control Module. . . . . . . . . . . . . . . . . . . 10 Amp Cru ise Control ,Rear Defogger , Gages , Warning
Lamps, Warning Buzzers, Closed Loop
......................... 20 Amp
License , Parking
Lamp, Sidemarker Lamps, Tail Lamp ............. 20 Amp
Heater ,
AIC ................................. _ ................... 25 Amp
W iS Wiper ..... · ................................................. 25 Amp Stop Lamp ,Hazard Lamp, Courtesy Light, Dome Light,
Glove
Box Light , Underhond Light ............................. 20 Amp
Luggage Lamp, Lighter, Clock, Key .Warning Buzz er, Dome & .
Read Light, Power Antenna , Closed Loop ....................... 20 Amp
Radio, Delay Wiper ,
Idle Stop Sol. .............. _ ................. 10 Amp
Back-up Lamps, Dir.
S ig. Lamps ................................. 20 Amp
Choke Heater ............. .............. _ ............... ........ 20 Amp
7·3