service CHEVROLET MONTE CARLO 1981 4.G User Guide

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 JACKING
CAUTION
To help avoid personal injury:
• Follow air jacking and stowage instructions.
• Use jack only for lifting this vehicle during wheel change.
• Never get . beneath the vehicle, start or run engine while vehicle is supported by jack.
• Always securely restol" sp!.re tire (orflattire) and all jac king equipment.
Wheel Nut Torque .
CAUTION: As soon as possible atter installing a wheel -AND at the intervals stated
In Section 'S of the Maintenanc," Schedule folder --have a technician tighten wheel nuts with a torque wrench to the specifications shown in "Specifications," Section 7 of this manual.
Wheel nuts should be tightened alternately and evenly to the correct torque.
Never use oil or grease on studs Of nuts.. Jrnproperty tightened wheel nuts could eventually aUow the whee! to come off while the veNeta Is moving, -po$$rbty causing
personal injury , damage and/or klss of c_ontrol. (Also see the "Replacement Fasteners" Caution In "Service and Maintenance ," Section 5 01 this m8nu81 regarding the danger of mixing metric and custom,sry fasteners. And, see the "Replacement Fasteners " Caution
under "Tires" in the same seclion regarding the importance of obtaining good metal-to­
metsl contact.)
Stowage ·of. Tire . and .!aC;.k,. . .
CAUTION: Always securely restow the spare tire assembfy (or nat tire), all jacking equipm ent, any tire inflator, and any covers or doors, using the means provided. This will help keep such things from being thrown about-and injuring people In the vehicta d.Ufing a sudden maneuver or an accident.
Before stowing
the tire, be sure:to clean the tire well 01 anything that would keep the tlr. from resting on the bOttom of the well. To stow the jack, place its lever in the "UP" position and. move the handle back and forth until the column is ·secure in the receiver (see Illustration). If these steps are not taken, the tire or lack may push against the trunk lid so thai the trunk lid cannot seal tightly. This _ may allOw carbon monoxide from the '. exhaust system -to get _inside tiMt c • . ttvougtl the trunk. (See "Engine -Exhaust Gas Caution (CaroonMonoxkle) " al the beginning of "Starting and Operating,'; Section 2 of this manual .)
Extended Vehicle Storage
If you plan to store your vehicle over an extended periOd of time, certain steps
should be taken to give it maximum protection.
It is recommended that you
write the Chevrolet Motor Division , General Motors Corporation, Consumer
Relations Dept., Warren , Michigan
48090, for detailed instructions on how to
prepare your vehicle for storage .
3-7

Downloaded from www.Manualslib.com manuals search engine Cleaning The Optional Vinyl Top
Wash the top often with neutral soap suds, luk ewarm water and a brush with
soft bristles . Rinse the top with plenty of clear water to remove all trac es of soap.
If the top needs more cleaning , you can use a mild foaming cleanser such as
GM Multi-Purpose Powdered Cleaner. (Do not use volatile-type cleaners or
household bleaching agents on the top material.)
• Rinse the top with water . Then, on an area of about 0.2 square meters
( two square feet), apply a mild foaming type cleanser.
• Scrub the area with a soft bristle brush, adding water as needed until the
cleanser foams to a soapy consistency .
• Wipe off the Cleanser with a cloth or spOnge. Apply more cleanser to the
area , and scrub until the top is clean.
• To avoid streaking, keep the cleanser from running onto the body finish.
• Rinse top with plenty of. clear water to remove all traces of cleanser.
Corrosion Protection
Generally, your vehicle has been designed and built to resist corrosion . Special
materials and protective finishes were used on most parts of your vehicle when it was built to help maintain good looks, strength and reliable operation .
However , some parts which normally are not visible (s uch as c ertain parts
under the the
hood ) are such that surface rust will not affect their reliability .
Therefore, corrosion protection i's not needed or used on these parts.
Sheet Metal Damage
If your vehicle is damaged and requires sheet metal repair or replac .ement ,
make
sure IheboOY .[epair S \)gJ;l) ll)Plies anti-corrosion material to the part s
repaired or replaced so that corrosibn '''protection is restored. (Also see "Finish
Damage" which follows .)
Foreign Material Deposits
Calcium chloride and other salts, ice melting agents, road oil and tar, tree sap,
bird droppings, chemicals. from industrial chimneys, and other foreign matter
may damage vehicle finishes
if left on painted surfaces.
Prompt washing
may not completely remove all of these depOSits. Other
cleaners
may be needed . When using chemical cleaners developed for this
purpose , be sure they are safe 'for use on painted surfaces .
FiniSh Damage
Any stone chips, fractures or deep scratches in the finish should be repaired
promptly . Exposed metal will co rrode quickly and may develop into major repair
,expense.
Minor chips and scratches .can be repaired with tQuch-up materials available
from your Chevrolet dealer
or other service outlets . Larger areas of finish
damage can
be corrected in your dealer's body and paint shop.
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Downloaded from www.Manualslib.com manuals search engine Underbody Maintenance
Corrosive materials. used for ice and snow removal and dust control can collect on the underbody. If these materials are not removed, accelerated corrosion
(rust)
can occur on underbody parts such as fuel lines, frame , floor pan, and
exhaust system even though they have been provided with corrosion
protection.
At least every spring, flush these materials from the underbody with plain
water .
Take care to clean well any areas where mud and other debris can
collect. Sedimentpacked in closed areas. of the frame should be loo~ened before being flushed. H desired, your authorized dealer can perform this service
for
you.
I
I
, NOTICE
TO
NEW CHEVROLET OWNERS
REGARDING
CHEMICAL PAINT SPOTTING
Chevrolet believes: that certamweatb'er and atmospheric condi­tions may create a chemical fallout whereby certain airborne pollutants -fall upon and attack _vehicle paint s. Occurrences have taken place primarily in the·-northeastem--se~boardarea."The" paint damagetaJees two forms: Blotchy, ringlet shaped discolora­
tions , and small irregular dark spots etched into the paint 'surfac e.
Paint spotting as a result of the fall~ut is not related to a de fect in paint materialsoE workmanshlp~For this reason, claims arising
from this condition are not considered to be warranty related.
Nevertheless . be_cause -Chew ,oiet shares the pride which our­_o wners lake_ in preserving and _ m.ain(aining the appearance of their vehicles, Chevrolet has authorized _ its dealers to repair, at no charge to .the owner , the surfac es of new vehicles damaged
by this fallout condition within 12 months or 20,000 kilometers (12,000 miles) of pUIchase , whichever ·comes fi~sf.
4·6

Downloaded from www.Manualslib.com manuals search engine SECTION 5
SERVICE AND MAINTENANCE
CAUTION: As with any mletdne, take car. when making any check, doing any maintenance, or making any repair, to avoid being Injured. Note that some of the materials in this vehicle may be hazardous if used, serviced , or handled improperly. Improper or incomplete servl'c. could alao lead to the vehicle ItMn not working properly which may resuH in personal Injury, or damage to the vehicle or its equipment. n you holy. any question about carrying out some service, hoIv. the service done by a skilled technician.
REPLACEMENT FASTENERS
During vehicle maintenance , any fasteners used to replace older ones must
h ,ave the same measurements and strength as those removed, whether metric or customary. (The numbers on the heads of metric bolts and on the surface s
of metric nuts show their strength . Customary
bolts use radial lines to show
thi s,
while most customa ry nuts do not have strength markings.) Fasteners
taken from the vehicle should be saved for re-use in the same spot when
possible . Where a fastener cannot be used again, take care to choo se a
repla cement that matches the old one. For information and help , see your dealer. .
CAUTION: This vehicle has some parts dimensioned in the metric system as well .. in the customary system. Some fasteners are metric and are very close in dimensnion to well· known customary fasteners in the inch system. Mismatched or incorrect fasteners
can result tnda~tp ~ vehic" or possibly personal Injury.
MAINTENANCE SCHEDULE AND WARRANTY
FOLDERS
For owner convenience, a separate folder has been provided with your vehicle which contains a complete maintenance schedule. It also briefly describes the
safety I emission control, lubrication and general service your vehicle requires.
The Maintenance Schedule folder is supplemented by this section of the
Owner 's
Manual.
Two Warranty Folders are also furnished with your Vehicle. These provide
detailed information on the :
• t981 Chevrolet New Vehicle Lim ited Warranty
• 1981 Chevrolet Perforation From Corrosion Limited Warranty
• 1981 Emissions Control Systems Warranties, including:
•
Emission Components Defect Warranty
• Emission Pertormance Warranty
• 1981 Chevrolet Powertrain Lirnited Warranty -Power Protection Plus
Read all four publications for a full understanding of your vehicle 's
maintenance needs.
You can get a replacement Maintenance Schedule from your dealer or send
the
VIN (or serial numbe r) of your vehicle to Consumer Relations, Chevrolet
Cent ral Office, Chevrolet Motor Division, Warren, Michigan 48090.
5-1

Downloaded from www.Manualslib.com manuals search engine FUEL CAP
The fuel cap is.behind the. rear license plate.
NOTICE: tt you need: to repWce the fuel cap, use only a cap with these same features as specifie your dealer.
The fuel tank filler cap has a "screw-on ratcheting type" feature .
• _ To remove -rotate cap counterclockwise to clear the inside of the filler
neck. This will allow any residual pressure to escape .
_ To install -reverse this procedure and tighten cap securely until a
"ratcheting ". clicking sound is heard indicating cap is on properly.
CATALYTIC CONVERTER
.Ttle .cal;!ly:tic converter is an emission control device added to the exhaust system,' to reduce exhaust gas pollutants. The converter contains
a ceramic material coated with noble metal catalysts. To prevent contamination
of the catalysts , unleaded gasol;"" must be used . Unleaded gasoline also
reduces spark plug louling. exhaust system corrosion and engine oil
deterioration.
The catalytiC converter requires the use of unleaded gasoline. Using leaded gasoline wilt cause --the converter to lose its effectiveness as an
emission control device. Leaded gasoline will also damage the Computer
Command Control, system oxygen sensor, which could affect emission control,
fuel economy . and drivability.
~,~.,y..'~,","~ ... :..., To help 'prevent damage:
1. Keep your engine properly maintained . Engine malfunctions involving the electrical, carburetion or ignition systems may result in unusually high
catalytic con verter and exhaust . sy~tem temperatures which, under
extreme malfunctioning conditions·, may ignite interior floor:"'covering
materials above the converter. Do not keep driving your vehicle if you
detect engine misfire, noticeable loss of performance ,or other unusual operating conditions. Instead. have it serviced promptly.
A properly maintained
engine will help avoid malfunctions that could damage
the converter.
~ will also help provide good emission control and fuel economy.
See the Maintenance Schedule , folder for information on inspecling and
maintaining the engine. exhaust system. and other components. .
2. Do not drive through or Idle or park your vehicle over combustible
materials, such as grass or leaves_ They could touch the hot exhaust
system and ignite.
3. Do not push or tow this vehiCle to start it. This may result in unusually
high catalytic converter and exhaust system temperatures which under
extreme conditions may ignite interior floor -covering material above the
converter.
Pushing or towing to start can also damage · the catalytic
converter itself.
Disregarding these
instructions could damage the cataly:tic converter. the
vehicle, or nearby property.
5-2

Downloaded from www.Manualslib.com manuals search engine COMPUTER COMMAND CONTROL SYSTEM
Your new vehicle has a special emission contrOl system, called the Computer
Command Control system. Some vehicleS sold in Canada also have the
Computer Command Control system. II your Canadian vehicle has a "CHECK
ENGINE" light,
it dOes have the Computer Command Control system.)
The Computer Command Control system monitors . the .exhaust stream with
an
oxygen sensor. Based on sensor signals, the electronic control module adjusts
the carburetor air-fuel ratio as needed. It is very important to use only
unleaded gasoline in vehicles equipped with the Computer COmmand Control
system . .Leaded gasoline will damage the oxygen sensor and may affect
. emission controL .
On
all vehicles with the COmpute r Command Control system, a "CHECK
ENGINE" ligtit
on the instrument panel is designed to come on during engine
starting, to
let you knowthe bulb .is working. (The light will stay on a'shdl1iime
after the. engine starts.) If. the light comes on while driving, service to the
Computer Command Control system may be. required. Although your vehicle
may
still be drivable,see yoyr dealer as SOon as possible for an inspection of
the system.
Continued
driving · Without having the Computer Command Control system
serviced could cause damage to the emiSsion control system. It could also aftect fuel economy and drivability. .. ..
ENGINE OIL AND FILTER RECOMMENDATIONS
Checking 011 Level ,>,-.. ,
The engine oil must be kept at the right level to. help assure proper lubrication
of your vehicle' .s engine.
It is the owner's responsibility to' cheCk the oil level at
regular': infervals '{such . 'as . "e~~Y"JHflLstop), according ·to ' the following instruct ions . It is normal for an engine-O to use Some oil, and most engines may
use
more oil when they are new . " .
• The best time to check' the engine Orffevel is when the oil IS warm, such as
during a
fuel stop. First, wait about 5 minutes for the oil to drain back to the oil pan. Then, pull out the dipstick on the side of the engine block (either
right or left). Wipe
it clean and. push the dipstick back down all the way.
Now,
pull out the dipstick and look at the oil level .on the dipstick.
Some dipsticks have "Add" and "Full" lines. Others are marked "Add lOt"
and "OperatlngRange ." In all cases, keep the oil level above the "Add" line_ Push the dipstick .oock down alilheway after taking the reading . Add oil , if needed . . .
• If you check the oil level when the oil is cold, do not iun the engine first.
The
cold oil will not drain back to the pan fast enough to give a tr ue oil
level. . .
Ch '
oosing the Right Quality on
Engine oils are labeled on'the containers with variOus API (Amercian Petroleum Institute) deSignations of·quality. Artewhigher-quality category of engine 011,
designation "SF", was introduced early in 1980. Be sure the oil you use has
the
API designation "SF," either alone or shown with other designations . Do not use oils labeled only SA, SB,SC, SO,' SE, CA, CB,CC, or CD; or oils
with a combination of any of these categories-like SE/CD.
5-3

Downloaded from www.Manualslib.com manuals search engine Choosing Oil Viscosity
Engine oil viscosity (thickness) has an effect on fuel economy. Lower viscosity engine oils can provide· better fuel economy; however, higher temperature
weather cOl1ditions. require· higher viscosity .engine. oils· for satisfactory
lubrication.
It is recommended that you select an oil not only of the proper quality and
viscosity, but also. a fuel-saving product.· These oils can be found in Chevrolet dealer serviGe departments, service stati()ns and other retail stores. They are
identified by words such as: "Energy Conserving," "Energy Saving," "Conserves Gasoline," "Gas Saving," "Gasoline Saving," "Friction
Reducing," "Improved Gasoline Mileage," "Improved Fuel Economy" or "Fuel
Saving."
The following chart lists the engine oil viscosities recommended for the
tE3lT1per~ture range you·. expecLbefore your next oil change. For temperatures
above -18'C '(O'F), SAE 10W-30 is the preferred viscosity grade. If cold­weather starting problems are encountered at temperatures below -18'C
(O'F), SAE 5W-30 viscosity oils m?-y be required.
Change Intervals
The oil and oil filter change intervals for your engine are based on the use of SF-quality oils and high-quality filters such as AC oil filters. Using oils other
than
SF-quality, or oil and/or filter change intervals longer than recommended, could reduce engine life.
Damage to engines due to improper maintenance or use of incorrect oil quality
'andl0r"'vi$9()~ity}s .~ot covered by the Chevrolet new car warranties.
Your engine WEIS filled with a high-quality engine oil when it was built. You do
not have to change this oil before the first recommended change
interval.
•
Severe Service-Change the oil and oil filter every 3,000 miles (4 800
kilometers) or three months (whichevefcbmes first) if one or more of the following "severe service" conditions is often encountered:
• Driving in dusty areas.
• Towing a trailer.
• Frequent idling or idling for long periods.
• Oriving 4 miles (6 kilometers) or less in freezing weather.
• Change the oil and oil filter as soon as possible after driving in a dust storm.
~ Norma! Service-If your engine is not a turbo-charged engine and your
normal driving does not include one of the above "severe service" conditions, change the oil every 7,500 miles (12 000 kilometers) or 12
months, whichever comes first. Change the oil
filter at the first oil change,
then every other
oil change, if mileage (7,500 miles or 12 000 kilometers)
determines when you change the oil. If time (12 months) determines when
you change the oil, change the filter with every oil change.
• If you have a turbocharged engine, it is VERY IMPORTANT to change the
oil and oil filter EVERY 3,000 miles (4 800 kilometers).
5-4

Downloaded from www.Manualslib.com manuals search engine un mUE SAl: VIScOSITY GRADES
F~O 20 40 60 100 C -30 -20 10 0 10 20 30 40 TEMPERATURE RANGE YOU .EXPECT SHORE NEXT Oil CHANGE
NOTICe: DO NOTUSE SAE 5W-2(I OILS fOR COIfi"INUOUS HIGH SPEED DRIVING.
Engine Oil Additives
There are many extra engine oil additives (or helpers) for sale. Your engine
should not need these extra additives if you Use SF-quality engine oil and
change it as suggested. If you think your engine has an oil-related problem,
talk
to your authorized dealer. If needed, your dealer can provide you with a
tested and approved oil additive called "GM Engine Oil Supplement."
AUTOMATIC TRANSMISSION FLUID RECOMMENDATIONS
Proper Fluid -Use only automatic transmission fluid labeled DEXRON® II. You
can buy this fluid from your dealer or other service outlets.
Checking
Fluid Level-Check the automatic transmission fluid level at each
engine
oil change, Overfilling GaI).c"!,J~e foaming and loss of fluid. A low fluid
level can cause slipping or loss of drive. In either case, transmission damage
can result.
To check the fluid
level, first set the parking brake, then start the engine in "P"(Park). With the regular brakes applied, move the shift lever through all the
gear ranges, ending
in "P". You must check the fluid level with the engine
running
at slow idle and the vehicle level.
You cannot read the correct fluid level if you have just.driven you(vehicle fora
long time at high speed, in city traffic in hot weather, or if your vehicle has
been
pulling a trailer. Wait until the fluid cools down (about 30 minutes).
Remove the dipstick
located at the rear of the engine compartment on the
passenger's side. Carefully touch the wet end of the dipstick to find out if the
fluid
is cool, warm or hot. Wipe it clean and push it back in until the cap seats. Pull out the dipstick and read the fluid level.
• If
it felt cool (about room temperature), the level should be 3 to 10
millimeters (118 to 3/8 inch) below the "Add" mark. The dipstick has two
dimples below the" Add" mark to show this range.
• If it felt warm, the level should be close to \he "Add" mark (either above or below).
• If
it was too hot to hold, the level should be at the "Full" mark.
5-5

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