lock CHEVROLET CAMARO 1967 1.G Chassis Workshop Manual

SECTION O

INFORMATION AND LUBRICATION

CONTENTS OF THIS SECTION

Page

General Information o-l

Lubrication 0-13

GENERAL INFORMATION

Model Identification and Vehicle Dimensions

Chevrolet

Chevelle

Chevy n

Corvette

Camaro
Page

0-1

0-1

0-2

0-2

0-3

0-3
Page

Unit and Serial Numbers o-3

Engine Number o-3

Vehicle Serial Number 0r3

Keys and Locks 0-4

Pushing,Towing and Lifting 0-7

Series

Biscayne

Bel Air

Tmpala.

Impala

Super Sport

Caprice
MODEL IDENTIFICATION-CHEVROLET

Model Number

6-Cyl

15311

15369

15335

15511,

15569

15535

15545

16387

16367

16369

16339

16335

16345

16787

16767

—

—

—

—
V-8

15411

15469

15435

15611

15669

15635

15645

16487

16467

16469

16439

16435

16445

16887

16867

16647

16639

16635

16645
Description

2-Door Sedan, 6-Passenger

4-Door Sedan, 6-Passenger

4-Door Station Wagon, 2-Seat

2-Door Sedan, 6-Passenger

4-Door Sedan, 6-Passenger

4-Door Station Wagon, 2-Seat

4-Door Station Wagon, 3-Seat

2-Door Sport Coupe, 5-Passenger

2-Door Convertible, 5-Passenger

4-Door Sedan, 6-Passenger

4-Door Sport Sedan, 6-Passenger

4-Door Station Wagon, 2-Seat

4-Door Station Wagon, 3-Seat

2-Door Sport Coupe, 4-Passenger

2-Door Convertible, 4-Passenger

2-Door Custom Coupe, 5-Passenger*

4-Door Custpm Sedan, 6-Passenger

4-Door Custom Wagon, 2-Seat

4-Door Custom Wagon, 3-Seat

*4-Passenger when optional bucket front seats are specified.

VEHICLE DIMENSIONS-CHEVROLET

Pertinent dimensions for the different models are shown in the following chart.

Model

Length Overall . .

Width Overall (Body)

Height Overall

Wheelbase

Tread-Front

Tread-Rear

Curb Weight: Approximately 3543 lbs.
Sedan

213.2"

79.6"

55.4"

119.0"

62.5"

62.4"

4-Door Sedan with
2-Door

Sport Coupe

213.2"

79.6"

54.4"

119.0"

62.5"

62.4"

L-6 Engine; 3685 lbs
Convertible

Coupe

213.2"

79.6"

55.3"

119.0"

62.5"

62.4"

. with V-8 Engine.
Station

Wagon

212.4"

79.6"

56.7"

119.0"

63.5"

63.4"

CHEVROLET CHASSIS SERVICE MANUAL

GENERAL INFORMATION 0-4

Fig.
1—Vehicle
Serial Number

Located on Left Front Hinge

Pillar—Chevrolet Shown
Fig.
2—Vehicle Serial Number and

Body Style, Body Number Trim and

Paint Combination Located on

Instrument Panel Brace

Under Glove Box—Corvette
Fig. 3—Four and Six Cylinder

Engine Unit Number Located on

Pad at Right Hand Side of Cylinder

Block at Rear of Distributor

Fig.
4—Eight Cylinder Engine Unit

Number Located on Pad at Front,

Right Hand Side of Cylinder Block
Fig.
5—Rear Axle Unit Number

Located Bottom Surface of Carrier

at Cover Mounting Flange—Corvette
Fig.
6—Rear Axle Unit Number

Located on Right or Left Axle

Tube Adjacent to Carrier

BSHfi^;^
PAINT

HRIKI5"tM>
fIHIsS
HE|St.>MfT*

^^ * *•'"
•<"'

Fig.
7—Body Style, Body Number

Trim Type and Paint Combination

Located on Upper Right Hand Side

of the Dash Panel—Chevrol et
Fig.
8—Body Style, Body Number

Trim Type and Paint Combination

Located on the Upper Left Hand

Side of the Dash Panel—Chevelle

and Camaro
Fig.
9—Body Style, Body Number

Trim Type and Paint Combination

Located on the Upper Right Hand

Part of the Dash Panel—Chevy II

1. Manufacturers identity number assigned to all

Chevrolet built vehicles.

2.
See Model Identification in this section.

3.
Last number of model year (1967).

4.
F-Flint

5.
Unit numbering will start at 100,001 at all plants.

KEYS AND LOCKS

Four keys (two hexagonal head and two round head) are

provided with each vehicle. The hexagonal-head key

operates the ignition switch and front door locks. The
round-head key operates the locks for the glove box and

rear compartment lid.

' Lock cylinders (except trunk) are furnished for service

uncoded, this necessitates the coding of these replace-

ment lock cylinders.

NOTE: In service, the trunk and glove box

lock cylinders are provided together with the

trunk lock cylinder coded and the glove box

cylinder uncoded.

The side bar type lock (fig. 18) is used for the ignition,

front doors and trunk. The glove box lock is of the wafer

CHEVROLET CHASSIS SERVICE MANUAL

GENERAL INFORMATION 0-5

Fig.
10—Delcotron Unit

Serial Number
Fig.
11—3-4 Speed Transmission Unit

Number Located on Lower Left Side of

Case Adjacent to Rear of Cover

(Saginaw)
Fig.
12-3 Speed Borg-Warner

Transmission Unit Number Located on

Boss Right Rear Comer of Extension

Fig.
13 — 4-Speed Transmission Source

Data Code is Located on Left Side of

Case at Lower Rear of Cover Flange

(Muncie)
Fig.
14—Starter Serial Number and

Production Date Stamped on Outer

Case,
Toward Rear
Fig.
15—Powerglide Transmission Unit

Number located on Right Rear Vertical

Surface of Oil Pan

16—The Turbo Hydra-Matic Transmission Serial Number

is Located on the Light Blue Plate

Location on the Right Side of the Transmission

tumbler, single bitted type having four tumblers. To

protect owners, automobile lock manufacturers stamp

the lock numbers on the lock core, shaft, etc., where they

will not show until lock is removed.

In addition, when a lock cylinder requires replacement

the lock code number may be obtained either from the

key, if available, or from old lock cylinder which is being

replaced.
Fig.
17—Battery Code Number Located on Cell

Cover Segment, Top of Battery

TUMBLERS

5 4 3 2 1

jjwvvvvvjl

SPRING RETAINER

Fig.
18-Side Bar Lock

CHEVROLET CHASSIS SERVICE MANUAL

GENERAL INFORMATION
0-6

Once the code number of the lock is obtained look up

this number in a key cutting book.

All side bar locks (except trunk) furnished to the field

by the Parts' Department are uncoded, that is, they are

furnished without tumblers, springs or spring retainers,

these parts are serviced separately. The tumblers come

in five different depths, indicated by numbers.

The side bar locks have six tumbler positions, and in

looking up the cutting code, the following may be used as

an example. After key code number is determined, either

from key or from number stamped on lock cylinder refer

to your code book and record the key cutting information

as follows:

Key of Lock

Code Number

0V11

Cutting or Tumbler

position from head

of lock
Key Cutting

Code Numerical

545431

123456

NOTE:
Key blanks used for ignition and door

locks are stamped with an "A" while rear com-

partment and glove box blanks are stamped with

a "B".

The number that is written above the cutting or tumbler

position indicates each different tumbler which is to be

dropped into each tumbier slot of the lock.

In cases where a code book is not available, the dia-

gram shown on Figure 19 may be used to determine the

tumblers required to assemble an uncoded lock cylinder.

1.
Lay the key on the diagram (fig. 19) with bottom of

key flush with edge of the drawing, head and point

carefully lined up.

2.
Read the code in numbers 12345 from the head of the

key to the end from positions 1 to 6 inclusive. As

each depth is determined write that number in the

blank space provided above the position numbers

(1-2-3-4-5-6).

3.
With key properly lined up on diagram, all cuts that

show in the first section are marked
"1"
J

4.
Cuts that fall in the first black section, mark "2".

5. Cuts that fall in the first white section, mark "3".

6. Cuts that fall in second black section, mark "4".

7. Cuts that fall in the second white section, mark "5".

After the numbers have been determined and written

above the cutting positions the lock cylinder should be

assembled as follows.

Lock Cylinder Assembly—Refer to Figure 20

1.
Hold cylinder with head of cylinder away and starting

•... at the head of the cylinder, insert the tumblers in
their proper slots in the order called for by the

code, ribbed side toward you and long point down.

2.
After all tumblers are in place, check for correct-

ness with the code. Then press tumblers down with

one finger.

3.
Insert one tumbler spring in the space provided

above each tumbler.

CAUTION: If the springs are tangled, do not

pull them apart—unscrew them.

4.
Reverse the lock cylinder so that the head of the

cylinder is now toward you. Insert the spring re-

tainer so that one of its six prongs enters into each

of the springs and the two large end prongs slide into

the slots at either end of the cylinder. Press the

retainer down with one finger.

5. To check, insert proper key and if tumblers are in-

stalled properly the side bar will be allowed to drop

down. If bar does not drop down, remove the key,

spring retainer, springs and tumblers and reas-

semble correctly.

NOTE:
If the tumblers have not been assembled

correctly and not according to the code, the

tumblers can be removed from the cylinder by

holding it with the tumbler slots down, pulling

the side bar out with the fingers and jarring the

cylinder to shake the tumblers out. This pro-

cedure is necessary because after the tumblers

have been pressed down into the cylinder they

are held in their slots by the cross bar.

6. If after checking it is found that the lock is as-

sembled properly, remove key and place cylinder in

INSERTING

TUMBLER
CHECKING

WITH CODE

STAKING

POINTS

NSERTING

TUMBLER SPRINGS
INSERTING

SPRING RETAINER

Fig.
19—Tumbler Requirement Diagram
Fig.
20—Assembling Lock Cylinder

CHEVROLET CHASSIS SERVICE MANUAL

GENERAL INFORMATION
0-9

Fig.
25—Attachment
of
Towing Chain Hooks
to
Axle Tube

Fig.
24—Towing Sling Attachment—Front

Rear

Connect standard chain hooks around the axle tube from

the underneath side between the axle rear spring pad and

the brake flange plate (fig. 25). It is mandatory that the

chain hook be positioned as stated above so that the brake

lines are not damaged.

The lower lifting bar should be positioned in below the

vehicle so that the rubber straps protect the rear valance

panel. With the lower bar in this position, it is necessary

that the bar be spaced down a minimum of
1
5/8" to pre-

vent damage to the fuel tank. This can be accomplished

by placing 6.0" section of 2x4' wood blocks below the

rear section of each rear spring (fig. 26).

To facilitate towing without a helper it will be neces-

sary to attach the
2x4*
s to the rear spring by a strap or

tape.
See Figure 27.

Also it will be necessary to lock the steering wheel in

the straight ahead position prior to actually moving the

vehicle.
Fig.
26—Towing SJing Attachment—Rear

REAR SPRING

EYE

WOOD

BLOCK

Fig.
27—Strapping Wood Block
to
Rear Spring

CHEVROLET CHASSIS SERVICE MANUAL

GENERAL INFORMATION 0-10

THIS DIMENSION MUST NOT

BE EXCEEDED DUE TO

POSSIBLE DAMAGE TO THE

STEERING KNUCKLE LOWER

CONTROL ARM STOP.

LIFT ONLY ON THE

4"
AREA EXTENDING

REARWARD FROM

THE FRAME RAMP.

CAUTION:
CARE MUST BE USED

TO PREVENT JACK

PAD FROM DAMAGING
DO NOT LIFT ON

REAR SPRING FRONT

MOUNTING BRACKET

BUMPER JACK LIFTING AT

FRAME ATTACHMENT AREA ONLY.

FLOOR JACK OR HOIST LIFT
DRIVE ON HOIST

FLOOR JACK ONLY

Fig.
28-Vehicle Lifting Points-Chevy II

Lifting With Auto Jack

The shaded areas on both the front and the rear

bumpers, as shown in Figures 21, 22, 28, 29 are recom-

mended auto jack lifting points. The jack load rest must

locate under the bumper at these points. Be sure the

load rest is positioned properly on the jack before raising

the vehicle. On Corvettes, position jack on shaded areas

indicated on Figure 30. Be sure jack load rest properly

contacts frame before raising vehicle.

Lifting Car With Drive-on Hoist

Many dealer service facilities and service stations are

now equipped with a type of automotive hoist which must

bear upon some part of the frame in order to lift the

vehicle. In Figures 21, 22, 28, 29, 30 the shaded areas

indicate areas recommended for hoist contact.
LIFTING THE CORVETTE

Shaded, areas in Figure 30 indicate 'recommended

points for hoist or jack contact. When using a single post

hoist place hoist on frame side rail behind kickup at front

and forward of #3 body mount at rear. When using a

twin-post hoist, two methods are recommended.

a. If no rear axle or suspension work is contem-

plated, use either suspension adapters or drive-

on adapters at the front, and drive-on adapters

at the rear. If a need for axle work develops, use

jack stands beneath the frame side rails on each

side and lower rear post.

b.
If rear axle work is contemplated, use either

suspension adapters or drive-on adapters at the

front and frame lift adapters as shown in Figure

31.
If frame lift adapters are not available, use

jack stands.

NOTE:
Wooden blocks, bolted to steel beam

shown in Figure 31 are necessary to allow

beam to clear exhaust system.

CHEVROLET CHASSIS SERVICE MANUAL

LUBRICATION 0-14

SAE 5W-30 oils may be used during periods when

temperatures of 32° and below are to be expected.

Types of Oils

In service, crankcase oils may form sludge and varnish

and under some conditions, corrosive acids unless pro-

tected against oxidation.

To minimize the formation of these harmful products

and to assure the use of oil best suited for present day

operating conditions, automobile manufacturers have de-

veloped a series of sequence tests designed to evaluate

the ability of any oil to properly lubricate automobile

engines.

It is recommended that only those oils which are

certified by their suppliers as meeting or exceeding the

maximum severity requirements of these sequence tests

(or GM Standard 4745-M) be used in Chevrolet engines.

Certified sequence tested oils will be described as such

on their containers.

Maintaining Oil Level

The oil gauge rod is marked "Full" and "Add Oil."

These notations have broad arrows pointing to the level

lines.
The oil level should be maintained between the

two lines, neither going above the "Full" line nor under

the "Add Oil" line. DO NOT OVERFILL. After operating

vehicle allow a few minutes for oil to return to crankcase

before checking oil level.

Check the oil level frequently and add oil when

necessary.

Oil and Filter Change Intervals

NOTE:
Under prolonged dusty driving condi-

tions,
it is recommended that these operations

be performed more often.

OIL

To insure continuation of best performance, low main-

tenance cost and long engine life, it is necessary to

change the crankcase oil whenever it becomes contami-

nated with harmful foreign materials. Under normal

driving conditions draining the crankcase and refilling

with fresh oil every 60 days or every 6000 miles which-

ever occurs first, is recommended.

It is always advisable to drain the crankcase only after

the engine has become thoroughly warmed up or reached

normal operating temperature. The benefit of draining is,

to a large extent, lost if the crankcase is drained when

the engine is cold, as some of the suspended foreign

material will cling to the sides of the oil pan and will not

drain out readily with the cold, slower moving oil.

OIL FILTER

Change engine oil filter every 6000 miles or every 6

months, whichever occurs first.

NOTE:
For Vehicles in heavy duty operation

involving continuous start-stop or prolonged idl-

ing, engine oil should be changed after 2500-

3000 miles of operation. The filter should be

changed after 5000-6000 miles of operation.
Crankcase Dilution

Probably the most serious phase of engine oil deterio-

ration is that of crankcase dilution which is the thinning

of the oil by fuel vapor leaking by pistons and rings and

mixing with the oil and by condensation of water on the

cylinder walls and crankcase.

Leakage of fuel, or fuel vapors, into the oil pan occurs

mostly during the "warming up" period when the fuel is

not thoroughly vaporized and burned. Water vapor enters

the crankcase through normal engine ventilation and

through exhaust gas blow-by. When the engine is not

completely warmed up, these vapors condense, combine

with the condensed fuel and exhaust gases and form acid

compounds in the crankcase.

As long as the gases and internal walls of the crank-

case are hot enough to keep water vapor from con-

densing, no harm will result. However, when the engine

is run in low temperatures moisture will collect and

unite with the gases formed by combustion resulting in

an acid formation. The acid thus formed is likely to

cause serious etching or pitting which will manifest itself

in excessively rapid wear on piston pins, camshaft

bearings and other moving parts of the engine, oftentimes

causing the owner to blame the car manufacturer or the

lubricating oil when in reality the trouble may be traced

back to the character of fuel used, or a condition of the

engine such as excessive blowby or improper carburetor

adjustment.

Automatic Control Devices to Minimize

Crankcase Dilution

All engines are equipped with automatic devices which

aid greatly in minimizing the danger of crankcase

dUution.

The thermostat, mounted in the cylinder head water

outlet, restricts the flow of water to the radiator until a

predetermined temperature is reached, thus minimizing

the length of time required to reach efficient operating

temperature, reducing the time that engine temperatures

are conducive to vapor condensation.

A water by-pass is included in the cooling system,

utilizing a hole in the front of, the cylinder block. This

allows a limited circulation of coolant, bypassing the

thermostat until thermostat opening temperatures are

reached. This system provides a uniform coolant tem-

perature throughout the engine, eliminating localized

hot-spots, improving exhaust valve life, provides fast

warmrup of lubricating oil and fast temperature rise in

the coolant which provides fast heater operation in cold

weather.

A thermostatic heat control on the exhaust manifold

during the warming up period, automatically directs the

hot exhaust gases against the center of the intake mani-

fold, greatly aids in proper vaporization of the fuel.

An automatic choke reduces the danger of raw or

unvaporized fuel entering the combustion chamber and

leaking into the oil reservoir.

An.
efficient crankcase ventilating system drives off

fuel vapors and aids in the evaporation of the raw fuel

and water which may find its way into the oil pan.

CRANKCASE BREATHER CAP

Clean and re-oil at every oil change..

CHEVROLET CHASSIS SERVICE MANUAL

LUBRICATION
0-21

6

3-SPEED

4-SPEED

AUTOMATIC

10

LUBRICATE EVERY 6,000 MILES GL -Multi-purpose
or
Universal Gear Lubrincant*

-(V LUBRICATE EVERY 12,000 MILES WB-Wheel Bearing Lubricant

V/^ (Whenever Brakes
are
serviced)
AT —Automatic Transmission Fluid (Type)

BF -Brake Fluid

a
LUBRICATE EVERY 36,000 MILES

* Refill Positraction Rear Axle with

Special Lubricant Only.
CL -Chassis Lubricant

EO—Engine
Oil

Fig.
36—Lubrication Diagram—Corvette

1.
Front Suspension

2.
Steering Linkage

3. Steering Gear
4.
Air
Cleaner

5. Front Wheel

Bearings
6. Transmission

7. Rear Axle

8.
Oil
Filter
9. Battery

10.
Parking Brake

11.
Brake Master Cylinder

BODY LUBRICATION POINTS (CORVETTE)

Lubricate the following items when possible.

Hood Latch Mechanism and Hinges --Apply light engine oil

to pivot points. Don't oil lock pins or catch plates.

i

Rear Compartment Lid Release and Hinges --Apply light

engine
oil.

Side Door Hinge Pins—Apply light engine oil.
Door Lock Rotor and Striker Plate—Apply light engine oil or

stainless stick lubricant.

Lock Cylinders—Lubricate with powdered graphite.

Window Regulators and Controls and Door Lock Remote

Link —Apply light engine
oil.

Gas Tank Filler Cap Hinge—Apply light engine oil.

Weatherstrips and Rubber Bumpers —Coat lightly with
a

rubber lubricant.

CHEVROLET CHASSIS SERVICE MANUAL

SECTION
1A

HEATER
AND AIR
CONDITIONING

CONTENTS
OF
THIS SECTION

Heater

Air Conditioning
Page

1A-1

1A-13

HEATER

GENERAL DESCRIPTION

CHEVROLET, CHEVELLE,
AND
CAMARO

Components
of the
Chevrolet, Chevelle,
and
Camero

heaters
are
attached
to the
firewall
on the
right side
of

the vehicle. The blower
and air
inlet assembly and water

hoses
are
located on the engine side
of
the firewall while

the heater core and distributor duct
are on the
passenger

side.

The heater operates
on
outside
air
only with
the

blower receiving
its
airflow from
the
cowl vent plenum

chamber.

Since
the
unit
has no
water valve, water circulation

keeps
the
core
hot at all
times.
Air
passing through
the

core receives maximum heat from
the
core.

In operation, three levers control
all
heater opera-

tions.
The
AIR-FAN lever
is a
combination control;

moving
the
lever half-way opens
the
AIR door
(by
means

of
a
bowden cable)
to
supply outside
air to the
three

speed blower. Further movement
of the
lever operates

the blower.
The
other levers depend on bowden cables
to

operate
the
diverter doors located
in the
distributor

duct
to
control heater output and operation.

At
the
heart
of
the heater operation
is the
temperature
door.
Air
from
the
blower follows parallel paths through

the distributor duct, with
one
path passing through
the

heater core
and the
other path bypassing
the
core.
The

temperature door, operated
by the
TEMPERATURE
con-

trol lever,
is
placed
in the
duct
so
that when
it
closes
off

the path from
the
heater core,
it
allows ambient airflow

through
the
unheated path.
In the
opposite position only

heated airflow
is
allowed. Final heater output tempera-

ture
is
dependent upon
the
proportion
of
heated
and

unheated
air
blended together according
to the
setting
of

this temperature door.
To
insure positive closing
of
this

door when
the
heat lever
is in the off
position,
a cam

lock device
is
utilized
in the
control linkage
of the

Chevelle heater only.

Just beyond
the
temperature damper door
is the Air

door, operated
by the
AIR-FAN control lever, which
is

the
air
on-or-off control. This door will
be
open when-

ever
the
heater blower
is in
operation.

The defroster door, operated
by the
DEFROSTER

lever, acts
to
divert
the
heated
air
flow
up
through
the

defroster ducts
for
de-fogging, defrosting
or
de-icing

operations.

Figures
1 and 2
illustrate airflow through
the
heater.

BLOWER

DEFROSTER

OUTLET

DASH

PANEL

OUTSIDE
AIR
FROM

COWL PLENUM DUCT

HEATER

OUTLET

DOOR

DOOR

Fig.
1
— Heater
Air
Flow (Chevrolet, Chevelle, Corvette, Camaro)

CHEVROLET CHASSIS SERVICE MANUAL

HEATER AND AIR CONDITIONING 1A-2

DEFROSTER-q

DOOR
v-

HEATER
OUTLET
DEFROSTER
OUTSIDE
AIR
FROM PLENUM

OUTLETS
""•—

,
BLOWER
« 1

/ y

r J

\

AIR
DUQ

•*-——

DOOR
—-**

X J

HEAT
DOOR
HEATER

CORE

Fig. 2-Heater Schematic (Chevy 11)

CHEVY
II

Heater components are located under the instrument

panel in the passenger compartment. Hot water hoses

from the engine are routed to the fire wall to the heater

core pipes. The blower motor receives outside air from

the cowl vent plenum chamber through the adapter as-

sembly. The air enters the heater core chamber where

it either bypasses or passes through the core depending

on the position of the temperature door, controlled by

the TEMPERATURE lever on the instrument panel.

Temperature control is achieved by adjusting the position

of this door to vary the proportion of heated and unheated

air introduced to the car interior. As the air flow is

drawn out of the heater core chamber (in the desired

proportion of hot and cold), it enters the blower where

it is thoroughly mixed, assuring a uniform temperature.

The distributor guides the air flow through either the

floor outlet or the defroster outlets depending on the

setting of the DEFROSTER lever on the instrument

panel. The AIR-FAN lever is the air OFF control as

well as the blower control.

CONTROLS

Control Assembly (Chevrolet, Chevelle, Camaro,

and Chevy II)

Air-Fan Lever

Since the heater makes use of outside air only, this

lever serves as an "air on or off" control by actuating

a damper in the distributor assembly downstream ("up-

stream" in the Chevy n heater) from the blower assem-

bly. With the lever in the half-way position, this damper

will be open to allow airflow into the vehicle. Moving the

lever further will actuate the three-speed (LOW-MED-

HIGH) fan lever which controls the blower motor and

determines the volume and force of the air flowing

through the heater core into the car.

Temperature Lever

Through its bowden cable, this lever controls the
positioning of the temperature door in the distributor

duct. This door allows airflow through either the heater

core (full RIGHT) or the bypass duct around the heater

core (full LEFT). Because the water temperature is con-

stant, this knob acts as an air mixture control, control-

ling temperature by varying the proportions of heated

and unheated air blended in the heater distributor duct.

The cam lock device at the damper door operating

lever (Chevelle only) may be adjusted as follows: Loosen

the two attaching screws. Place the cam in the closed

position and insert a pin through holes provided, locking

the cam in this position. Rotate the entire assembly

toward the closed position. Hold closed with some force

and tighten attaching screws. Remove the locking pin.

Defrost Lever

The defrost lever controls the position of the damper

(or deflector) door located in the heater and defroster

assembly. In the "off" position full airflow will go to

the floor duct for car heating purposes. In the "de-ice"

position the diverter door will drop down and divert

almost all the airflow to the defroster duct. (This posi-

tion will seldom be needed except for extreme de-icing

requirements). A "detent" position is built into the

Fig. 3—Heater Control Panel (Chevrolet Shown as Typical)

CHEVROLET CHASSIS SERVICE MANUAL