1973 CHEVROLET CAMARO heating

Downloaded from www.Manualslib.com manuals search engine It is the owner's responsibility
to keep the freeze protection at a
level commensurate with the tem­
peratures which may occur
in the
area of vehicle operation.
• Maintain cooling system freeze
protection at
_200 F or below
to ensure protection against cor­
rosion and loss of coolant from
boiling, even though freezing
temperatures are not expected.
• Add ethylene glycol base cool­
ant that meets GM Specification
1899-M when coolant additions
are required because of coolant
loss or to provide additional
protection against freezing at
temperatures lower than
_200
F (_320 F in Canada).
NOTE: Alcohol or methanol base
coolants
or plain water are not
recommended for your Camaro at
any time.
Radiator Pressure Cap
The radiator cap, a 15 lb. pres­
sure type, must be installed tightly,
otherwise coolant may be lost and
damage to engine may result from
overheating. Radiator pressure
caps should be checked periodi­
cally for proper operation.
If re­
placement
is required specify AC.
Thermostat
The cooling system is protected
and controlled by a thennostat
in­
stalled in the engine coolant outlet
to maintain a satisfactory operat­
ing temperature of the engine. This
thermostat
is designed forcontinu­
ous use through both winter and summer
and need not be changed
seasonally . When replacement
is
necessary, Delco parts are recom~
mended.
Tires
The factory installed tires on
your car
as shown in the Tire
Usage chart below are designed to
provide the best all around per­
formance for normal vehicle oper­
ation. When inflated
as recom­
mended on the tire pressure plac­
ard, located
on the left door of
your vehicle, they have the load
carrying capacity to operate satis­
factorily at all normal highway
speeds.
CAMARO TIRE USAGE
ENGINE AND BODY STANDARD OPTIONAL
All (Except Type l T or Z28 Models) E78·14 F70·14 G70·14
Type lT Space Saver Tire E78·14 F70·14
Z28 F60·15 White letters Space Saver Tire -
All standard tires are blackwall with whitewall optional. All tires are bias-belted, load
range B unless otherwise specified. .
55

Downloaded from www.Manualslib.com manuals search engine a bobby pin) between the rubber
cup at the end of the spark plug
wire and the tubular metal con­
nector inside of it. If the spark
plug wire is wet or oily, wipe it
dry. Wrap a dry handkerchief or facial tissue, folded several thick.
nesses, around the wire at least three inches back from the end
and grasp the wire at this point.
Hold the bare wire about 1f4 inch
from the
bare tip of the spark
plug from which you removed the Checking Spark
wire. When the engine is "turned over" a spark should jump across
the V" inch space, indicating ample current supply. If no spark
jumps, the difficulty is probably caused by a defective ignition port
and should be corrected by your Authorized Chevrolet Dealer.
COOLING SYSTEM
When the cor will run but evidences serious overheating on the temperature gauge in the instrument panel, there are several items
which may be checked .
(L) Engine overheating will occur when the OIL lEVEL falls danger­ously low. Check the oil level as a matter of course.
(M) Low COOLANT LEVEL will , of course, couse engine over­heating. Determine . the cause of the low coolant level and have
it corrected if necessary.
(N) Check the RADIATOR CORE. Clean it if it is plugged with
bugs, leaves or other foreign material.
65
(0) Condition of the FAN BELT is very important, not only for en­gine cooling but also for proper generator operation. Check the
condition of the belt. Replace it if it is worn or frayed. Loosen the generator toward the engine to remove and replace the belt. Tighten the belt, whether new or old, by loosening the generator bolts, prying with a bar on the generator until the belt is ten­sioned properly, then retighten
the generator bolts.
(PI Another couse of engine ove rheating may be on inopera­
tive COOLING SYSTEM THERMO­STAT. If the thermostat should foil in the closed position, it will not
perm it coolant to circulate through
the system . In such on emergency the thermostat may be removed
but should be replaced with a properly functioning thermostat as soon as possible.
Fan 8.11 Tension
Thermoslal Inslollo/ion

Downloaded from www.Manualslib.com manuals search engine INDEX
Accessory Drive Belts. . . . . . . . . . . . . . . .. 48 Accessory Position, Steering
Column Lock. .. . . . . .. . . .. . .. .. .... 13 Acrylic Lacquer. . . . . . . . . . . . . . . . . . . . .. 43 Adjusters, Automatic Brake ............ 21 Air Circulation . . . . . . . . . . . . . . . . . .. . ... 28 Air Cleaner. . . . . . . . . . . . . . . . . . . . . . . . .. 48 Air Conditioning
Maintenance. . . . . . . . . . . . . . . . . . . . . .. 52 Air Inlets, Ventilating System .......... 28 Ammeter ............................ 26 Antenna ................ ............. 33 Anti-freeze (See Cooling System). . . . . . .. 53 Anti-Spin Differential. . . . . . . . . . . . . . . .. 35 Anti-Theft Key Buzzer System .......... 13 Anti-Theft Steering Column Lock ....... 13 Appearance Care ..................... 41 Ash Trays. . . . . . . . . . . . . . . . . . . . . . . . . .. 22 Automatic Brake Adjusters. . . . . . . . . . .. 21 Automatic Transmissions
Fluid Check ........................ 49 Fluid Recommendations ............. 49 Maintenance. . . . . . . . . . . . . . . . . . . . . .. 49 Operation .......................... 15 Starter Safety Switch. . . . . . .. . . . . . ... 14 Axle Rear
Fluid Level. . . . . . . . . . . . . . . . . . . . . . .. 48 Maintenance. . . . . . . . . . . . . . . . . . . . . .. 48 Ball Joints ........................... 50 Battery
Emergency Starting. . . . . . . . . . . . . . . .. 37 Fluid Level. . . . . . . . . . . . . . . . . . . . . . .. 61 Gas Caution ....................... 37 Specifications. . . . . . . . . . . . . . . . . . . . . .. 66 Bearings,
Front Wheel.
................ 51 Before Driving Your Camaro . . . . . . . . . . 3
Belted Tires .......................... 55 Belts
Engine Drive. . . . . . . . . . . . . . . . . . . . . .. 48 Lap ................................ 5 Shoulder............ . .............. 7 Body Identification Number ............ 66 Brakes
D.riying Through Deep Water. . . . . . .. 20 Lmmgs ............................ 21 Maintenance ....................... 51 Master Cylinder Level. .............. 51 Parking Brake ...................... 20 Pedal Travel. . . . . . . . . . . . . . . . . . . . . .. 21 Power. .............. .............. 20 Self-Adjusting. . . . . . . . . . . . . . . . . . .. .. 21 Trailer ............................ 10 Warning Ljght. .. . . . . . . .. . . . . . . . . .. 24 Break-In Period Cars Pulling Trailers. . . . . . . . . . . . . . .. 10 New Car.......................... 2
Bright Metal Cleaning .......... '" .... 44 "Brights" Headlamp Indicator .......... 25 Buckles, Seat Belt.. . . . . . . . . . . . . . . . . . .. 6
Bulbs and Fuses . . . . . . . . . . . . . . . . . . . . .. 69 Bumper Jack
Operation ...... " .................. 40 Stowage ........................... 40 Buzzer Key Reminder.. .. .. .. .. .. . .. .. .. ... 13 Cap, Filler
Engine Oil. .................... 46, IBC
Gasoline .......................... IBC
Radiator. . . . . . . . . . . . . . . . . . . . . . . . . .. 39 Capacities. . . . . . . . . . . . . . . . . . . . . . . . . .. 66
Carbon Monoxide Caution ............. 12 Carpet Care .......................... 41
74
Carrier, Infant Safety.... . . . . . . .. .. . . .. 9
Changing Wheels and Tires. . . . . . . . . . .. 39 Charging System Indicator Light. . . . . . .. 24
Chassis Maintenance . . . . . . . . . . . . . . . . .. 50 Child Restraint
Cars Not Equipped With
Special Child Restraints. . . . . . . . . . 9
Child Safety Seat. . . . . . . . . . . . . . . . . . .
9 Infant Safety Carrier. . . . . . . . . . . . . . .. 9 Chrome Protection .................... 44
Cigarette Lighter. . . . . . . . . . . . . . . . . . . .. 27 Circuit Breakers, Headlamps. . . . . . . . . .. 69 Cleaning
Carpet Care. . . . . . . . . . . . . . . . . . . . . . .. 41 Exterior Finish and Trim. . . . . . . . . . .. 43 Fabric and Interior Trim ............ 42
Solvents Recommended .............. 41 Spot Removal. . . . . . . . . . . . . . . . . . . . .. 42 Vinyl Top ... , . . . . . . . . . . . . . . . . . . . .. 44
Clock ............................... 27 Clutch Maintenance. . . . . . . . . . . . . . . . . . . . . .. 49 Pedal Adjustment ................... 21 Coat Hooks........ ...... ........ .... 4
Cold Weather Starting ................. 14 Compartment
Glove ............................. 3
Luggage. .......... ................ 3
Complaint Procedure .................. 70 Conditioner, Air ...................... 30 Controlled Differential. . . . . . . . . . . . . . .. 35 Controls ............................. 13 Cooling System
Care ........... ................... 53 Coolant Recommendation. . . . . . . . . .. 53 Overheating Caution. . . . . . . . . . . . . . .. 39 Cowl Air Inlets ....................... 28

Downloaded from www.Manualslib.com manuals search engine Dealer Assistance. . . . . . . . . . . . . . . . . . . . . 70
Defogger, Rear Window ............ ... 30 Defroster, Defogger, Windshield .... .... 29 Delco Eye On Battery . . . . . . . . . . . . . . . .. 61 Dimensions, Vehicle ................... 66 Dimmer Switch , Headlamp ............ 21 Directional Signals.. . . . . .. . . . . . . . . .. .. 17 Door Locks. . . . . . . . . . . . . . . . . . . . . . . . . . 4 Drive Belts, Engine. . . . . . . . . . . . . . . . . .. 48
Driver Seat Adjustment. . . . . . . . . . . . . . . . . . . .
5 "Drive" (D) Transmission Range. . . . . 15 Dusty Conditions, Operating Under Oil Change Interval. . . . . . . . . . . . . . . .. 46 Oil Filter Change Interval. . . . . . . . . . . . 46
Electric Clock.. .. .. . .. .. . .. .. .. . . .. .. 27 Electrical System Ammeter ................ .......... 26 Battery ......................... ... 61 Bulbs ..................... ........ 69 Fuses ................... .......... 69 Generator Indicator Light. . . . . . . . . .. 24 Emergency, In Case Of ...... , . ........ 36 Brake Warning Light ................ 24 Generator Indicator Not Charging. . .. 22 Hazard Warning Flasher ............. 36 Jacking To Change Wheels ........... 39 Jump Starting with Auxiliary Battery.. 37 Overheated Radiator. . . . . . . . . . . . . . .. 39 (Temperature Indicator: Hot) Pushing To Start. . . . . . . . . . . . . . . . . .. 37 Energizer (See Battery)
Engine Cooling
........................... 53
Exhaust Gas Caution .......... ...... 12 Flooded, Starting Procedure .......... 14
Overheating. . . . . . . . . . . . . . . . . . . . . . .. 39
Serial Number.... . . . . . . . . . . . . .. . ... 66
Specifications ....................... 66 Starting. . . . . . . . . . . . . . . . . . . . . . . . . .. 13 Temperature Light .................. 24
Engine Oil
Capacity. . . . . . . . . . . . . . . . . . . . . . . . .
.. 66
Change Interval ................... , 46 Dip Stick .......................... 47 Filter ................. , ........... , 46
Pressure Indicator ................. , 23 Recommendation . . . . . . . . . . . . . . . . . .. 46
Ethylene Glycol Coolant. ............. , 53 Exhaust Gas Caution ...... ............ 12
Driving With Trunk Open ........... 12 Parked With Engine Running. . . . . . .. 12 Pulling A Trailer ............... .. . , 10 Exterior Finish and Trim Care. . . . . . . .. 43
Fabric Care . ........ ................ , 41 Fan Belt .......... ..................... 48
Ventilating ......................... 27 Filters OiL ............................... 46
Finish Care, Exterior. . . . . . . . . . . . . . . .. 43
First Few Hundred Miles of Driving ........................ .... 2
First Gear. . . . . . . . . . . . . . . . . . . . . . . . . .. 17 Flame Arrestor. . . . . . . . . . . . . . . . . . . . . .. 48
Flammable Cleaning Solvents .......... 41 Flashers Hazard Warning .................... 36 Turn Signal. . . . .. .. .. .. .. .. .. .. .... 17 Flooded Engine, Starting. . . . . . . . . . . . .. 14 Floor Controls. . . . . . . . . . . . . . . . . . . . . .. 20
Fluid Levels
Battery
............... ............. 61 Brake Master Cylinder ............. , 51 Engine Oil. . . .. .. .. . . . . . . .. . . .. . . .. 48
75
Power Steering. . . . . . . . . . . . . . . . . . . .. 51 Radiator .................. , ........ 55 Rear Axle. . . . . . . . . . . . . . . . . . . . . . . .. 48
Transmission ................ . .. . , .. 49
Fluid Recommendations
Battery
.......................... .. 61 Brake ................... .......... 51 Power Steering . . . . . . . . . . . . . . . . . . . .. 51 Radiator ............ , ........... , .. 55
Transmission .......... ............. 49
Windshield Washer ...... ........... 27 Fogging, With Air Conditioner. . . . . . . .. 32
Folding Seat Back Latches ........... " 4
Foreign Countries, Operation In ........ 11 Four Way Hazard Flasher. . . . . . . . . . . .. 36 Front Suspension . . . . . . . . . . . . . . . . . . . .. 50 Front Wheel Bearings ................. 51 Fuel (See Gasoline) Full Rated Load (See Tires)
Fumes Engine Exhaust . . . . . . . . . . . . . . . . . . .
.. 12
Gasoline ........ ... ................ 12
Fuses
Chart ............................. 69 Location ........................... 68 Gas Station Information
Inside Back Cover Gasoline (See Also Fuel) Do Not Use For Cleaning ........... 41 Filler Cap Location ................ IBC
Fumes ...................... ....... 12
Gauge .......... ......... .......... 23 Low-Lead .......... ................ 45
Recommendations. . . . . . . . . . . . . . . . .. 45
Gauge, Fuel. . . . . . . . . . . . . . . . . . . . . . . . .. 23 GearshiftLever .................... '" 17 Generator Indicator Light ("AMP") .................... ...... 24

Downloaded from www.Manualslib.com manuals search engine Recommendations. . . . . . . . . . . . . . . . .. 46 Transmissions. . . . . . . . . . . . . . . . . . . . .. 49 Viscosity ., .......... ............... 47 Operation in Foreign Countries ......... II Other Controls and Features. . . . . . . . . .. 35 Outside
Air Vents .......................... 28 Overheated Engine
Indicator Light. ............. : . . . . .. 24 What To Do ....................... 24 Overseas Operation. . . . . . . . . . . . . . . . . .. 11 Owner Assistance ..................... 70 Paint Care ........ ............... ....... 43 Touch Up ......... ................ 43 Parking Brake ............................. 20 Brake Check . . . .. . . . . . . . . . . . . . . .. .. 20 Lights ........... .................. 69 "Park" (P) Transmission Position ... .. 16 Precautions. . . . . . . . . . . . . . . . . . . . . . .. 20 Polishing And Waxing ................. 43 Positive Traction Differential. . . . . . . . . .. 35 Power Brakes ........ .................... 20 Steering . . . . . . . . . . . . . . . . . . . . . . . . . .. 18 Pressure, Tire Inflation . . . . . . . . . . . . . . .. 56 Pushing To Start. . . . . . . . . . . . . . . . . . . .. 36 Radiator
Coolant ........................... 55 Coolant Level Inspection. . . . . . . . . . .. 53 Overheating.. . . .. . . . .. . . . . . . . . . .... 39 Pressure Cap. . . . . . . . . . . . . . . . . . . . . .. 55 Radio
AM/FM ......... .. .. .............. 33 Antenna ..................•.. ...... 33 Tape System. . . . . . . . . . . . . . . . . . . . . .. 34 Raising Car With Jack. . . . . . . . . . . . . . .. 40
Rear
Axle .............................. 48 Speaker ................... ...... .. 34 Window Defogger. . . . . . . . . . . . . . . . . . 30 Registration, Vehicle Engine Number. . . . . . . . . . . . . . . . . . . . 66 Vehicle Identification Number ........ 66 Release, Hood ....................... IBC
Replacement Tires. . . . . . . . . . . . . . . . . . .. 58 Replacement Wheels. . . . . . . . . . . . . . . . .. 59 Restarting. . . . . . . . . . . . . . . . . . . . . .. . . .. 14 Restraints
Child ........... . ........ .......... 9
Lap Belts .... ...................... 5
Methods Of Restraining Children. .. . . 9 Shoulder Belts . . . . . . . . . . . . . . . . . . . . . . 7
Retractors, Lap Belt. . . . . . . . . . . . . . . . . . 5
"Reverse " (R) Transmission Range ..... 16 Roof Care, Vinyl . . . . . . . . . . . . . . . . . . . .. 44 Rotation, Tire.. . . . . . . . . . . . . . . . . . . . . .. 57 Safet y Belts (Seat Belts).. . . . . . . . . . . . . . . . . . . 5
Carrier, Infant.... . . . . . . . . . . . . . . . . . . 9
Seat , Child ....................... " 9
Schedule .
Break-In... .. . ... ..
... ...... . .. .. .. 2
Maintenance. . . . . . . . . . . . . . . . . . .. . .. 45 Seat Adjustment, Manual. . . . . . . . . . . . . . . . 5
Back Latch, Folding Front. . . . . . . . . .. 4
Child
Safety.. .. . . .. . . . . . . . . . . . . . . .. 9 Seat Belts
Buzzer Light Reminder. ... .. .. .. .... 6
Child Restraint. . . . . . . . . . . . . . . . . . . .. 9
Inspection and Care. . . . . . . . . . . . . . . . . 8
Lap
............... ................ 5
Retractors. . . . . . . . . . . . . . . . . . . . . . . .. 5 Shoulder........................... 7
77
Self-Adjusting Brakes. . . . . . . . . . . . . . . .. 21 Service and Maintenance. . . . . . . . . . . ... 45 Shift Linkage Maintenance . . . . . . . . . . . . . .. 50 Operation (See Transmission) .. : . . . .. 15 Shoulder Belts Adjustment . . . .. . . . . . . . . 7 Side Marker Lights. . • . . . . . . . . . . . . . . .. 69 Signals, Turn ......................... 17 Solvents , Recommended Cleaning ....... 41 Sound Systems (See Radio) Space Saver Tire ........ .. ; ......... .. 60 Spare Tire
Jacking Instructions. . . . . . . . . . . . . . . .. 40 Spark Knock (See Fuel
Recommendations)
Speaker, Rear. . . . . . . . . . . . . . . . . . . . . . .. 34 Specifications Body.:: .. ......................... 66 CapacIties. . . . . . . . . . . . . . . . . . . . . . . .. 66 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . 66 Engine ................ ........ .... 66 Filters ............................. 46 Fuses .......................... ; .. 69 General ....... .................... 66 Light Bulbs. . . . . . . . . . . . . . . . . . . . . . . . 69 Lubricants . . . . . . . .. .. . . . . . . . .. . .. .. 46
Speedometer. . . . . . . . . . . . . . . . . . . . . . . . . 22 Spot Cleaning ........................ 41 Stainless Steel Protection. . . . . . . . . . . . .. 43 Stains, Removal of ........ ............ 41 Starter Interlock. . . . . . . . . . .. . . . . . . . . . . . . .. 13 Safety Switch.. .. . . . .. . . . . .. . . . . .... 14 Starting
Automatic Transmission Cars. . . . . . .. 13 Emergency ......................... 37 Manual Transmission Cars ........... 14

Downloaded from www.Manualslib.com manuals search engine Steering Column Controls. . . . . . . . . . . . . . . . . .. 13 Column Lock. . . . . . . . . . . . . . . . . . . . .. 13 Gear Lubricant. .................... 51 Linkage Inspection. . . . . . . . . . . . . . . . .. 48 Maintenance. . . . . . . . . . . . . . . . . . . . . .. 48 Power ....................... ...... 18 Wheel, Tilt ......................... 19 Straps, Safety (See Seat Belts) Storage Of Items..... . .. . . . . . . . . . . . . .. 5 Suspension Maintenance. . . . . . . . . . . . . .. 50 Tape System, Stereo. . . . . . . . . . . . . . . . . .. 34 Temperature ........... ............ " 29 Control , Cooling.. . .. . . . . . . . . . . . . . .. 29 Control, Heating. . . . . . . . . . . . . . . . . . .. 29 Indicator Light/Gauge. . . . . . . . . . . . . .. 26 Thermostat ....... ................... 55 Tilt Steering Wheel.. . . . . . . . . . . . . . . . . .. 19 Tire
Belted .. ........................... 55 Care ........................ ...... 55 Changing ........................ " 39 Full Rated Load ............ ....... . 57 High Speed Operation ............... 56 Hydroplaning. . . . . . . . . . . . . .. . . . . . .. 58 Inflation Pressure ............. ... , .. 56 Inspection ............ ... ........ " 57 Load Limit. . . . . . . . . . . . . . . . . . . . . . .. 56 Rotation ..... ............ .......... 58 Space Saver ........................ 60 Traction ............. .............. 59 Tread Wear Indicators .... ... ....... 57 Usage and Options... . . . . . . . . . . . . . .. 55 Towing
Caution ........... ................ . 36
Disabled Vehicle .................... 36 To Start. .... ........ .............. 36 Toxic
Cleaning Solvents ................... 41 Exhaust Fumes ..................... 12 Traction, Wet Roads. . . . . . . . . . . . . . . . . . 5
Traffic Hazard Flasher. . . . . . . . . . . . . . .. 36 Trailer Hauling.. . . . . . . . . . . . .. . . . . .. .. 10 Break-In Period .................... 11 Cautions . . . . . . . . . . . . . . . . . . . . . . . . . .. 11 Equipment.. . . . . . . . . . . . . . . . . . . . . . .. 10 Special Maintenance ............. .... 10 Tire Inflation ......... .............. 10 Trailer Tongue Load. . . . . . . . . . . . . . .. 10 Transmission 3-Speed Manual. . . . . . . . . . . . . . . . . . .. 17 Automatic .................. ....... 15 Braking Effect On Hills .............. 16 Checking Fluid Level. . . . . . . . . . . . . . .. 49 Fluid And Strainer.. . . . . . . . . . . . . . . .. 49 Fluid Change Interval. . . . . . . . . . . . . . . 49 Maintenance. . . . . . . . . . . . . . . . . . . . . .. 49 Shift Controls.. . . . . . . .. .. . . . . . . . ... 50 Shift Indicator
Turbo Hydramatic .................. 50 Tread Wear Indicators ................ 57 Trim Care, Interior .................. , 41 Trunk
Driving With Trunk Open ........... 12 Turbo-Hydramatic . . . . . . . . . . . . . . . . . . .. 50 Maintenance. . . . . . . . . . . . . . . . . . . . . .. 50 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . 15 Turn Signals and Lane Change
Feature ................. ........... 17 Underbody Maintenance. . . . . . . . . . . . . . . 61
78
Upholstery And Carpet Care ........... 41 Vehicle Identification Number .......... 66 Vehicle Loading ................... '" 57 Ventilating Blower .................... 26 Ventilating Grilles .................... 26 Vents Outside Air ..................... 26 Vinyl Fabric Care Interior ........... .. .... 41 Roof Care. . . . . . . . . . . . . . . . . . . . . . . .. 43 Volatile Cleaning Solvents. . . . . . . . . . . .. 41 Caution ........................... 41 Volume Control, Radio ................ 33 Warning Flasher, Hazard .............. 36 Warning Lights. . . . . . . . . . . . . . . . . . . . . .. 23 Brake ............................. 24 Engine Temperature ....... .......... 24 Generator .......................... 24 Oil Pressure.. . . . . . . . . . . . . . . . . . . . . .. 23 Warranty (See Warranty Folder)
Washers
Windshield
...................... '" 27 Washing ............................. 43 Waxing And Polishing.. .. . . . .. . . . . .. .. 43 Wheel Bearings , Front .... . . . . . . . . . . . .. 51 Wheel Changing. . . . . . . . . . . . . . . . . . . . .. 39 Wheel Discs, Replacement. . . . . . . . . . . .. 39 Wheel, Tilt Steering ................... 19 Windshield
Defrosting and
Defogging . . . . . . . . . . . . . . . . . . . . .
.. 29 Washer Use In Cold Weather ........ 27 Washer Solution ............ .......• 27 Wipers And Washers.. . . . . . . . . . . . . .. 27 Wrecker, Towing. . . . . . . . . . . . . . . . . . . .. 36 Zone Offices ......... ............ .. 72, 73