1967 CHEVROLET CAMARO wheel

LUBRICATION 0-18

12

LUBRICATE EVERY 6000 MILES GL -Multi-purpose Gear Lubricant*

WB—Wheel Bearing Lubricant

LUBRICATE EVERY 12000 MILES (Whenever Brakes are serviced)

CL —Chassis Lubricant

LUBRICATE EVERY 36000 MILES E°-En9ine°il

"Refill Positraction Rear Axle with Special Positraction Rear Axle

Lubricant Only.
AT —Automatic Transmission Fluid (Type A)

SL —Steering Gear Lubricant

BF -Hydraulic Brake Fluid

1.
Front Suspension

2.
Steering Linkage

3. Steering Gear
Fig.
33—Lubrication Diagram—Chevelle

4.
Air Cleaner

5. Crankcase Breather Cap

6. Front Wheel Bearings
7. Transmission

8. Rear Axle

9. Oil Filter
10.
Battery

11.
Parking Brake

12.
Brake Master CylincU

CHEVROLET CHASSIS SERVICE MANUAL

LUBRICATION
0-19

.
3-SPEED
4-SPEED

7 OVER DRIVE

10 9 5 1 6 2 '
AUTOMATIC

3 12 11

LUBRICATE EVERY 6,000 MILES GL-Gear Lubricant*

WB-Wheel Bearing Lubricant

(Wh Bk
AT-Automdtic Transmission Fluid

^ WB-Wheel Bearing Lubricant (Type A)

-TV
LUBRICATE
EVERY 12,000 MILES (Whenever Brakes are serviced)

' CL—Chassis Lubricant

• LUBRICATE EVERY 36,000 MILES EO_Engine Oil
BF
-Brake Fluid

•Refill Positt

Special Lubricant Only.
Axl«
with

1.
Front Suspension

2.
Steering Linkage

3. Steering Gear
Fig.
34—Lubrication Diagram—Chevy I!

4. Air Cleaner

5. Crankcase Breather. Cap

6. Front Wheel Bearings
7. Transmission

8. Rear Axle

9.
Oil Filter
10.
Battery

11.
Parking Brake

12.
Brake Master Cylinder

CHEVROLET CHASSIS SERVICE MANUAL

LUBRICATION 0-20

3-SPEED

4—SPEED

AUTOMATIC

LUBRICATE EVERY 6000 MILES

LUBRICATE EVERY 12000 MILES

LUBRICATE EVERY 36000 MILES

*
Refill
positraction rear axle with

special lubricant only.
GL -GEAR LUBRICANT*

WB-WHEEL BEARING LUBRICANT

(WHENEVER BRAKES
ARE
SERVICED)

CL -CHASSIS LUBRICANT

CO-ENGINE
Oil;
AT -AUTOMATIC TRANSMISSION

FLUID (TYPE
A)

BF -BRAKE FLUID

Fig.
35—Lubricafion Diagram—Camaro

1.
Front Suspension

2.
Steering Linkage

3. Steering Gear
4.
Air Cleaner

5. Crankcase Breathe Cap

6. Front Wheel Bearings
7. Transmission

8. Rear Axle

9. Oil Filter
10.
Battery,

11.
Parking Brake

12.
Brake Master Cylinder

BODY LUBRICATION

See Body Service Manual
for
Body Lubrication,

cept Corvette)
(Ex-

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

HEATER AND AIR CONDITIONING 1A-3

linkage of this lever which will provide partial airflow

only to the defroster duct and which should be used for,

all normal defogging operations.

CORVETTE

Heater components are attached to the dash panel on

the right side of the vehicle with the air inlet assembly

on the engine side and the heater and air distributor

assemblies beneath the instrument panel within the pas-

senger compartment.

The heater operates on outside air only with the blower

receiving its air flow from the cowl vent plenum

chamber.

No water valve is utilized in the system. Therefore,

water flows through the heater core constantly while

the engine is running, keeping the core at maximum

temperature at all times.

Airflow through the system is shown in Figure 1.

Controls

Two knobs control all heater operations:

The FAN-TEMP knob is rotated to turn the blower

on and off and control blower speed and is pulled out

as desired to regulate heater temperature.

The AIR-DEF knob is the air on-and-off control as

well as the defroster control.

Temperature Damper: Door

At the heart of the heater operation is the temperature

damper 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 damper door is placed in the duct

so that, when closed, the path of the heated air leaving

the heater core is blocked while the ambient air path

remains open. Positive closing of this door when no

heat is being called for is assured by a cam assembly

at the door operating lever. As the FAN-TEMP knob

is pulled out, the damper door is opened accordingly,

allowing varying proportions of heated air to mix with

the unheated airflow, thus providing heater outlet tem-

perature control. With the knob pulled fully out the
Fig.
4—Heater Controls (Corvette)

ambient air path is blocked and all airflow passes

through the heater core. Final heater output temperature

is dependent upon the proportion of heated and ambient

air blended together according* to the setting of the

temperature damper door.

Air and Defrost Damper Doors

Beyond the temperature damper door are the air door

and the defroster door, both operated through a single

bowden cable by the AIR-DEF knob. The first half of the

travel of this knob opens the AIR door allowing the

airflow to pass into the interior of the car through the

floor distributor openings. Pulling the AIR-DEF knob

fully out causes the defroster door to open, diverting

this airflow to the defroster ducts for defogging, de-

frosting or deicing operations.

NOTE: Since this knob is the air on-or-off

control, it should be pulled at least halfway out

before turning on the blower.

Fan Control

Rotate the FAN-TEMP knob to operate the three-

speed blower, increasing the velocity of the air through

the heater. The fully counter-clockwise position of the

knob is the off position. Turn clockwise to the desired

blower speed; fully clockwise for high blower speed.

COMPONENT REPLACEMENT AND REPAIR

CHEVROLET, CHEVELLE, AND CAMARO

Blower Assembly

Removal

1.
Disconnect battery ground cable.

2.
Unclip heater hoses from fender skirt.

3.
(Chevrolet and Camaro) Remove right front fender

and skirt assembly. (See Section 11 of the Service

Shop Manual)

(Chevelle) Move the vehicle front wheels to the

extreme right turn position. Remove all right front

fender retaining bolts. Allow the skirt to drop and

rest on top of the tire. To gain maximum clearance

for access to the blower motor attaching screws, a

block of wood may be wedged between the fender

lower flange and the top of the fender skirt. Position

the wood block so that the rear portion of the skirt

will be forced down and inboard. (See Figure 7.)
4.
Disconnect the blower motor wire at the motor

flange.

5.
Remove the motor to case mounting screws and re-

move motor. Pry the flange gently if the sealer acts

as an adhesive.

6. Remove the blower wheel retaining nut and separate

blower and motor.

Installation

1.
Assemble the blower wheel to the motor with the

open end of the blower away from the motor.

2.
Place the assembly into the case and replace the

mounting screws. Connect the blower motor wire to

the motor.

3.
(Chevrolet and Camaro) Replace the fender and

skirt assembly.

(Chevelle) Replace the fender skirt.

4.
Clip the heater hoses to the fender skirt and connect

the battery ground cable.

CHEVROLET CHASSIS SERVICE MANUAL

HEATER AND AIR CONDITIONING 1A-6

CHEVROLET SHOWN AS TYPICAL

Fig.
8—Heater Hose Routing (Chevrolet Shown as Typical)

cables, defroster hoses and the

place and install all at-

4.

5.

6.
Attach all bowden

wiring connector.

Set heater assembly into

taching nuts and screws.

Attach inlet and outlet hoses.

Replace glove box and glove box door.

Refill cooling system.

Defroster Duct

Installation of the defroster duct as used in Chevy H

vehicles is illustrated in Figure 14.

Blower Motor

Replacement

1.
Remove the heater assembly from the firewall.

Remove the five screws attaching the motor and

blower to the heater assembly.

2.
Remove the retainer attaching blower to the motor

shaft.

3.
Replace blower on new motor assembly, balance and

reinstall into heater assembly.

Fan Control

Replacement

1.
Remove the screws at the dash lower edge which

retain the control assembly and lower the assembly.

2.
Disconnect the blower harness connector and remove

the switch retaining screws and switch.

3.
Install the replacement switch with the nylon bearing

inserted into the AIR - FAN lever slot.

4.
Connect the blower harness connector and remount

the control assembly in the dash.
CORVETTE

Blower Assembly

Removal

1.
Remove the radiator supply tank from its retaining

straps and move it out of the way, then disconnect

the battery positive cable.

NOTE:
It is not necessary to drain the radiator.

2.
Remove the connectors from the blower motor.

3.
Scribe or chalk a mark on the blower motor mount-

ing plate and blower assembly.

4.
Remove the five screws retaining the blower mount-

ing plate to the blower inlet assembly.

Withdraw the blower assembly from the inlet

5.

assembly.

Disassembly

Remove the blower wheel from the motor by removing

the nut and tapping the motor shaft with a soft hammer.

Installation

1.
Assemble the blower to motor and using the scribe

mark, properly position the blower assembly on the

inlet assembly and install the five screws.

2.
Replace the electrical connectors on the blower

motor.

3.
Replace the radiator supply tank and the battery

positive cable.

Blower and Air Inlet Assembly

Removal

1.
Drain the radiator.

2.
Remove the radiator supply tank from its retaining

straps and swing it out of the way.

3.
Remove the battery.

CHEVROLET CHASSIS SERVICE MANUAL

HEATER AND AIR CONDITIONING 1A-18

HIGH BLOWER

i DELAY RELAY

AMBIENT-SUN

SENSOR AND

COMPRESSOR SWITCH

Fig. 29—Comfortron Engine Compartment Components

COMFORTRON SYSTEM

The Chevrolet Comfortron Air Conditioning System is

basically the same as the Chevrolet Four-Season system

but with the additional feature of completely automatic

control. See Figures 28, 29 and 30 for views of the

Comfortron system. To the customer, the most notice-

able difference between the two systems, will be in the

control panel. In place of the three-lever/one-switch

panel of the Four-Season system, the Comfortron has a

single control lever plus a temperature dial similar to

that found in a home thermostat. After the dial is set to

the desired temperature indication and the lever is moved

to place the system in operation, the Comfortron will

automatically control the heating and air conditioning

functions to maintain the selected interior temperature

regardless of changes in outside air temperatures.

Most Comfortron parts are located in the passenger

compartment, (fig. 28)

Jn-Car Sensor

The function of the in-car sensor is to determine the

temperature of the interior of the automobile. It is

located beneath the overhang of the instrument panel.

Feedback Potentiometer

The feedback potentiometer indicates to the amplifier

system the position of the temperature door.
Control Head

A thumb wheel is provided to select the desired in-car

temperature. A control lever performs the following

functions:

1.
Operates a switch that allows the customer to select

the type of blower program desired.

2.
Operates the control head vacuum switch except

when the TEMPERATURE lever is in the OFF

position, thus programming the vacuum system.

3.
Operates the defroster through the control head

vacuum switch. The defroster door is partially

opened in the "DE FOG" position, and fully open in

the "DE ICE" position.

A two transistor amplifier is located on the bottom

side of the control head. It receives information from

the sensors, and in turn operates the transducer.

Fig. 30—Comfortron Control

CHEVROLET CHASSIS SERVICE MANUAL

HEATER AND AIR CONDITIONING 1A-20

and its resistance is decreasing. In the HI FRONT

position, two thermistors (the master delay and high

blower delay thermistors) are warming. The air

door is in recirculation position until the engine

coolant reaches 75 degrees.

2.
The coolant reaches then 75 degrees and the thermal

vacuum valve opens applying vacuum to the air door

to admit outside air (unless the temperature dial is

set for cooling). Ram air will flow through the sys-

tem when the car is moving.

3.
Next, the master delay thermistor attains the tem-

perature at which it will pass sufficient current to

close the circuit through the master delay relay.

The relay circuit powers the blower motor at 9 volts.

4.
If the control is in the HI FRONT position, the high

blower delay thermistor will close the circuit

through the high blower relay which supplies full

available voltage to the blower motor. This function

occurs after the master delay thermistor has taken

effect because the high blower delay thermistor

uses the master delay type thermistor with a 10 ohm

1/4 watt resistor connected in
.
series. The nigh

blower delay thermistor must then warm to a higher

temperature than the master delay thermistor before

its resistance (plus that of the 10 ohm resistor)

drops enough to actuate the high blower relay.

5. If the controls are set for DE ICE, full outside air

and full voltage to the blower motor are effective

immediately regardless of temperatures or elapsed

times o

In accomplishing automatic control, the system follows

three steps to transform an electronic signal into me-

chanical energy through which the control is achieved.

Electronic Circuit

Two temperature sensors (Thermistors), and the duct

potentiometer connected in series, are located so as to

sense the temperature of the outside air, inside air and

system output air. The resistance of each sensor will

vary according to its temperature. The control head

temperature dial varies in resistance as it is adjusted by

the operator to suit his comfort requirements. The

resistance of the temperature dial control is applied

directly to the amplifier and is not in series with the

sensors and duct potentiometer. Thus temperature dif-

ferences in the sensor string plus the requirements fed

into the system by the operator cause changes in total

circuit resistance which allow a varying voltage flow

through the circuit.

Changing the Electronic Signal to Electrical Voltage

This minute voltage flow from the sensor string -

temperature dial circuit - is fed into the amplifier where

it is transformed into a usable amplifier output voltage,

the strength of which is determined by the strength of the

original amplifier input signal. This voltage is then

supplied to the transducer.

Changing the Electrical Voltage to a Vacuum Signal

Amplifier output voltage, varying according to tem-

perature requirements, is converted by the Transducer

into a modulator transducer output vacuum. This modu-

lated vacuum is applied to the Power Servo.

Changing the Vacuum Signal to Mechanical Energy

The Power Servo, controlled by the modulated Trans-
ducer output vacuum, operates the vacuum electrical and

mechanical components of the system as required to

provide automatic control of system operation.

Other major system components are mounted con-

ventionally in the engine compartment. Underhood com-

ponents and system airflow remain much the same as in

the Four-Season system except for the addition of the

automatic control provisions. The system operates on

100%
outside air, a mixture of outside and inside air, or

100%
recirculated air depending on the demands of the

system. The diaphragm operated .air selector door will

modulate outside air to the system during maximum air

conditioning requirements when the control unit is in

"Hi Front" position. Control of the blower is also com-

pletely automatic and dependent upon system demands.

Controls

The Comfortron controls the Chevrolet air conditioner

and heater in such a precise manner that the automobile

temperature remains relatively constant under all driving

conditions. By adjusting the thumb wheel on the Control

Head to any temperature desired between 65° and 85° F.

(See Figure 27) the automatic system will adjust the in-

car temperature even though the outside weather condi-

tions may vary considerably. The system will provide

maximum capacity for heating or cooling until the in-car

temperature reaches the pre-set Control Head Tempera-

ture. Where cooling is required, the system will start

immediately upon being turned "ON". During marginal

ambient temperatures the system will not always start

at the highest blower speeds of the control setting.

Therefore, occasionally the system can't be heard

starting*

Five over-riding functions are available so that special

conditions can be handled. Each Control Head function

will be discussed in detail below:

"Off" Position

In the "Off" position, the blower is turned off and the

outside air door is closed. No outside air should enter

the automobile.

"Lo Front" Position

The blower has five low to moderate speeds; Hi, M3,

M2,
M1 and Lo. The blower voltage will shift as directed

by the automatic controls. The "Lo Front" position

provides a quieter mode of automatic operation due to

reduction of blower noise.

"Hi Front" Position

The "Hi Front" position provides five high blower

speeds as called for by the automatic controls: The use

of the "Hi" blower speed results in a rapid cool down in

hot weather and rapid heating during cold weather. As

the in-car temperature approaches the temperature set-

ting on the Comfortron Control Head, the blower speed

will change, provided mild outside temperatures are

experienced. During very hot or cold weather, the blower

will reduce its speed only to the point where it is still

capable of maintaining the correct inrcar temperature.

"Rear" Position

The "Rear" position provides five high blower speeds.

The automatic controls select these speeds and blend the

discharge air to the proper temperature. By the use of

high blower speeds, increased airflow is obtained for

better rear seat passenger comfort.

CHEVROLET CHASSIS SERVICE MANUAL