heater CHEVROLET CAMARO 1967 1.G Chassis Workshop Manual
[x] Cancel search | Manufacturer: CHEVROLET, Model Year: 1967, Model line: CAMARO, Model: CHEVROLET CAMARO 1967 1.GPages: 659, PDF Size: 114.24 MB
Page 9 of 659
GENERAL INFORMATION 0-7
a vise using leather or wood on each side to prevent
damage to the cylinder,
7. Stake the retainer securely in place by staking the
cylinder metal over both edges of the retainer ends
using a suitable staking tool at right angles to the
top of the retainer and from the cast metal of the
cylinder over the retainer at each corner.
PUSHING, TOWING AND LIFTING
Pushing
NOTE:
Towing car to start is not recommended
due to the possibility of the disabled car ac-
celerating into tow car.
AUTOMATIC TRANSMISSION
Do not attempt to start the engine by pushing the car.
Should the battery become discharged, it will be neces-
sary to use an auxiliary battery with jumper cables to
start the engine.
CAUTION: To prevent damage to electrical
system, never connect booster batteries in ex-
cess of 12 volts and connect positive to positive
and negative to negative.
Manual Transmission
When a push start is necessary turn off all electrical
loads such as heater, radio, and if possible, lights, turn
on the key, depress the clutch, and place the shift lever
in high gear. Release the clutch when your speed reaches
10 to 15 miles per hour.
TOWING
The car may be towed safely on its rear wheels with
the (selector lever in "N" (Neutral) position at speeds
of 35 miles per hour or less under most conditions.
However, the drive shaft must be disconnected or the
car towed on its front wheels if 1) Tow speeds in excess
of 35 MPH are necessary, 2) Car must be towed for ex-
tended distances (over 50 miles) or, 3) Transmission is
not operating properly. If car is towed on its front
wheels, the steering wheel should be secured to maintain
a straight ahead position.
DRIVE ON HOIST
BUMPER JACK LIFTING AT FRAME ATTACHMENT ONLY
FLOOR JACK OR HOIST LIFT
Fig.
21-Vehicle Lifting Pointe-Chevroiet
CHEVROLET CHASSIS SERVICE MANUAL
Page 16 of 659
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
Page 24 of 659
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
Page 25 of 659
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
Page 26 of 659
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
Page 27 of 659
HEATER AND AIR CONDITIONING 1A-4
CHEVROLET SHOWN AS
TYPICAL OF CHEVROLET
AND CHEVELLE
CHEVROLET
WITH CONSOLE
ONLY
THESE USED ON
CHEVROLET ONLY
Fig. 5— Heater Blower and
Air
Inlet (Chevrolet, Chevelle, Camaro)
Core
Replacement
1.
Drain radiator.
2.
Remove the heater hoses at their connections beside
the air inlet assembly.
NOTE:
The hose from the
water,
pump
must go
to the top heater core pipe; the other hose runs
from the thermostat housing to the lower core
pipe. (See Figure 8)
3.
Remove the bowden cables (except the Chevrolet
defroster cable) and all electrical connectors from
the heater and defroster assembly.
4.
On the engine side of the dash, remove the nuts from
the core case studs coming through from the inside
of the car.
5. Inside the vehicle, remove the case to firewall
mounting screws and pull the entire heater and de-
froster assembly from the firewall (remove the
Chevrolet defroster cable at this time) then remove
the assembly from the vehicle and set on a bench.
6. Remove the core assembly retaining springs and
remove the core.
7. Install the replacement core.
NOTE:
Be sure the core to case sealer is
intact before replacing core. Replace with new
sealer if necessary.
8. Replace the core and core retaining springs.
9. Within the vehicle (after attaching the Chevrolet
defroster cable) insert the five studs on the heater
and defroster assembly through the holes in the
cowl and blower and air inlet assembly. Replace the
case to firewall mounting screws and (on the engine
side) the five stud nuts.
10.
Replace the remaining bowden cables and electrical
connectors.
11.
Replace heater hoses, being careful to reinstall
CHEVROLET CHASSIS SERVICE MANUAL
Page 28 of 659
HEATER AND AIR CONDITIONING 1A-5
them in their proper location. (See Figure 8)
12.
Refill radiator.
Defroster Duct
Figure 9 illustrates the defroster duct installation
on Chevrolet, Chevelle and Camaro vehicles.
Bowden Cobles
Bowden cable attachment should be made in the fol-
lowing manner:
1.
With the cables attached to the control assembly
and levers, move the levers to their fully left or
closed position.
2.
Attach cable wires to the heater valve levers and
tighten cable attaching bracket screws.
3.
Check for proper cable operation and readjust as
necessary.
Control Panel
Control panel installation is shown in Figures 10, 11,
and 12.
Fan Switch
Replacement
1.
Remove control assembly-to-instrument panel re-
inforcement attaching screws and push the control
assembly toward the front of the vehicle and down.
2.
Remove the two switch attaching screws and the
electrical connector.
3.
Replace switch, screws, and electrical connector.
4.
Place control assembly into instrument panel and
replace attaching screws.
Resistor
The resistor assembly is attached to the heater dis-
tributor assembly. It should "be replaced if low or
medium blower speed is inoperative. Remove the glove
box for access to the unit.
HEATER HOUSING
LOWER RIGHT HAND
RETAINER NUT
Fig.
6—Air Distributor Duct (Camaro)
Fig.
7—Access to Blower and Housing (Chevelle)
CHEVY II
Heater Assembly
Removal (Fig. 13)
1.
Drain radiator.
2.
From within engine compartment;
a. Remove heater hoses from heater inlet and outlet
connections.
b.
Remove three nuts around blower motor attaching
heater assembly to dash panel.
3.
From within vehicle:
a. Remove glove box and glove box door.
b.
Remove screw attaching distributor bracket to
dash.
c. Remove the screw attaching case bracket to the
adapter assembly bracket.
d. Carefully detach heater assembly from dash panel
and adapter assembly and lower it toward floor of
vehicle.
e. Disconnect all bowden cable connections, the
wiring connector and the defroster hoses.
4.
Remove the heater assembly from the vehicle.
Core Replacement
1.
'With the heater assembly removed from the vehicle,
remove the screws attaching the core cover to the
heater assembly.
2.
Remove the core mounting screws and remove the
core from the assembly.
3.
Replace with a new core and replace the core cover.
Installation
1.
Be sure the adapter seal and blower motor seal are
in place and set into place beneath the instrument
panel.
CHEVROLET CHASSIS SERVICE MANUAL
Page 29 of 659
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
Page 30 of 659
HEATER AND AIR CONDITIONING 1A-7
Fig.
10—Control Assembly (Chevrolet)
6. Remove the seven stud nuts attaching the blower
and air inlet assembly to the dash panel.
7.
Remove the blower and air inlet assembly from
beneath the fender.
8. The blower assembly may be removed and dis-
assembled as described under "Blower Assembly"
above.
Installation
1.
With the blower and air inlet assembly in place,
install the seven attaching stud nuts.
2.
Replace the blower motor electrical connectors.
Fig.
9—Defroster Duct (Chevrolet, Chevell^, Camaro)
4.
Disconnect the blower motor electrical connectors.
5.
Remove the water hoses from the heater core inlet
and outlet connections.
\
N
^
1
Fig.
11-Controi Assembly (Chevelle)
CHEVROLET CHASSIS SERVICE MANUAL
Page 31 of 659
HEATER AND AIR CONDITIONING 1A-8
Fig.
12—Control Assembly (Camaro)
3.
Replace the battery and radiator supply tank.
4.
Replace each heater hose to its proper core
connection.
5. Refill the radiator.
Defroster Duct
Figure 19 illustrates the installation of the Corvette
defroster duct.
Fig.
13—Chevy II Heater Components Removal
Fig.
U-Defroster Duct (Chevy 11)
CHEVROLET CHASSIS SERVICE MANUAL