ignition CHEVROLET CAMARO 1967 1.G Chassis Workshop 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
0-6

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

HEATER AND AIR CONDITIONING 1A-56

BLACK & RED

IGNITION—-y^****

SWITCH -"A

/<J 7

BLOWER LEAD—^^^

RESISTOR—-" \^<

ASM.
f'

i
'fu^^^^A^^^^^r"G^OUH£>
WIRE

^^
k4

^EVAPORATOR HARNESS

' EVAPORATOR & BLOWER ASM.

Fig.
73—Underdash Wiring—Universal System (Typical)

evaporator outlet pipes. Locate the bracket about

1/2" from the dash panel.

12.
Replace the inlet and outlet hoses and hose clamp

connections.

13.
Evacuate and charge the system. Add three fluid oz.

refrigerent oil after installing a new core.

14.
Check system performance.

Corvette

Replacement (Fig. 78)

1.
Purge the system of refrigerant.

2.
Drain the engine radiator. Then remove the radiator

supply tank from its brackets, the heater water

valve and vacuum line from the firewall, and the

heater hoses from the core pipes. Carefully fold the

hoses,
valve and tank away from the evaporator

case.

3.
Remove the right hand hood lock support.
SCREW DRIVER

(NARROW BLADE) T£

GROOVE

A. Insert screw driver in

tang toward terminal

B. Pry tang back out to

when reinstalled into
RMINAL

\ CONNECTOR

TANG

groove & press

to release.

insure locking

connector.

Fig.
74—Terminal Removal—Universal System

4.
Disconnect the expansion valve equalizer line con-

nection and the evaporator oil bleed line from the

POA.

5.
Disconnect the evaporator outlet to POA inlet

connector.

6. Remove the POA bracket to evaporator case attach-

ing bolts. Then carefully move the valve and its

outlet hose away from the evaporator case.

Fig.
75-Cable Removal-All Weather

CHEVROLET CHASSIS SERVICE MANUAL

HEATER AND AIR CONDITIONING 1A-73

Fig.
105—Comfortron Control Head

10.
Introduce R-12 vapor at cylinder (room) temperature

and pressure.

11.
Leak test all fittings and connections and give partic-

ular attention to a leak test at the compressor shaft

seal if compressor has not been leak tested on the

bench.

12.
Complete system processing and charge system.

FUSES

A fuse, located in the junction block protects the entire

air conditioning system except for the blower when op-

erating at high speed.

A second fuse, to protect the high speed blower circuit,

is located in the electrical wiring between the horn relay

and the Air Conditioner relay (except Universal). The
Universal unit has a fuse in the line between the ignition

switch and the Air Conditioner blower switch. See the

specification page for the proper replacement fuse.

FOUR SEASON HEATER COMPONENTS

Corvette

The heater components of the system are, in general,

much the same as those of the standard Corvette heater.

Heater hoses carry the engine coolant to the heater core,

located in the air distributor duct beneath the instrument

panel.

A significant difference is that in the Corvette Air

Conditioning System there is no flow through the heater

core until the COOL IN-HOT PULL knob is pulled out.

This movement opens the vacuum switch on the air

distributor assembly and allows vacuum to be applied

to the water valve mounted in the engine compartment,

opening the valve. Thus the heater core is unheated

until needed, at which time it receives full flow of the

engine coolant. Air passing through the core receives

maximum heat which is tempered by mixing with un-

heated air before entering the passenger compartment.

Heater Core

Replacement

The heater core in the Corvette Air Conditioning

System is removed in the same manner as the core in

the Corvette heater. The distributor assembly must first

be removed from under the dash as covered previously

in this section before the core can be removed and

replaced.

Water Valve

Installation of the water valve is illustrated in Figure

113.
An inoperative valve must be replaced.

Chevrolet

Heater Core

Removal

1.
Disconnect battery ground cable.

2.
Drain radiator

3.
Remove right front fender and skirt assembly.

Fig.
106—Comfortron Temperature Dial Adjustment
Fig.
107—Amplifier Removal

CHEVROLET CHASSIS SERVICE MANUAL

HEATER AND AIR CONDITIONING 1A-81

HORN RELAY

r

CONN.-

14 BROWN

(TO FUSE

PANEL)
BATTERY
1

—I ^ COMPR

ESSOR

DASH y

V-^ PANEL \

GROMMET—%
1 \

_ J~ ") "^

>14 BLACK/RED STRIPE-

FUSE .20 AMP.

•WIRE ASM. BLOWER-

MOTOR
14 BLACK 1

IGNITION SWITCH1

(ACCESSORY

TERMINAL)

CONTROL SWITCH
-RESISTOR

CONN.

•14 TAN

•16 BLACK

LIGHT BLUE STRIPE

•THERMOSTAT CONTROL

EVAPORATOR & BLOWER ASM.

Fig.
117—Universal System Wiring Diagram (Typical)

CHEVROLET CHASSI

HEATER AND AIR CONDITIONING 1A-82

•BATTERY

(POS)
CABLE
NOTE
When
control
switch*

is !TOFF"
&
Air
Cond
is
"ON"

(Control
knob
pulled
but) the

blower
fan'will
run at low
speed.
CONTROL
SWITCH

CONNECTIONS

OFF

LOW

MED

HIGH
B
TO
NONE

B
TO L

BTOL&M

B
TO L
&
H

COMPRESSOR
GROUND

WIRE
ASM
BATTERY

(NEGATIVE)

CABLE

COMPRESSOR
ASM

DASHPAJSTEL

GROMMET

16DG
CONTROL

SWITCH

RESISTOR

ASM

14LBL

14BRN
CLUTCH

COIL

EXTENSION

WIRE
ASM
-14BRN--N

JUNC

BLOCKi

OSTATIC

SWITCH

CONTACTS

NORMALLY

CLOSED
STARTING

MOTOR

SOLENOID

BLOWER

MOTOR
AIR
COND

CONTROL

(PUSH-PULL)

KNOB

DOOR
SWITCH

(PUSH
BUTTON

NORMALLY

CLOSED)
RELAY

ASM

HORN

RELAY

DIVERTER

DOOR CABLE

FUSE

PANEL

EVAPORATOR

ASM

IGNITION SWITCH-

ACCESSORY TERMINAL)

Fig. 118—All Weather Wiring Diagram (Chevy II)

CHEVROLET CHASSIS SERVICE MANUAL

HEATER AND AIR CONDITIONING 1A-83

DIVERTER DOOR

CRANK POSITIONS:

AIR COND "ON"

AIR COND "OFF*
AIR COND SWITCH

(PUSH BUTTON,

NORMALLY CLOSED

CONTACTS)

BLOWER MOTOR

CONTACTS

NORMALLY

4D

16

16B/Y

COMPRESSOR

GROUND WIRE

ASM

BAT.
TERMINAL

ON STARTING

MOTOR SOLENOID

' BATTERY

CABLE ASM:

NEGATIVE

POSITIVE—*
- CONTROL SWITCH

SET AT:

•OFF

LOW

MED

HIGH
CONTACTS:

BTOBL

BTOL

BTOM

BT0M6B,

CLUTCH

HOUSING
liOli: WHEN CONTROL

SWITCH IS AT "OFF" &

AIR COND. IS "ON", FAN

WILL RUN AT LOW SPEED.

"AIR COND-PULL"

KNOB (SHOWN IN "ON"

POSITION)

TO REGULATOR

HORN

RELAY
16 BRN-BODY WIRING

HARNESS-837

14BRN

I

^
IA^RN
* IGNITION SWITCH

« 12R ACCESSORY TERMINAL

12R f

AMMETER

LEGEND:

AIR COND WIRING (PART OF

ENGINE WIRING HARNESS)

WIRING IS PART OF EQUIP

REG PRODUCTION WIRING

Fig.
119—Corvette—Four-Season Wiring Diagram

CHEVROLET CHASSIS SERVICE MANUAL

SECTION 6

ENGINE

CONTENTS
OF
THIS SECTION

Page

Engine Tune Up
6-1
Torque Sequence

Engine Mechanical
(In
Line)
6-12
Special Tools
. .

Engine Mechanical (V8)
6-24
Page

6-39

6-40

ENGINE TUNE UP

INDEX

Page

General Description
. 6-1

Mechanical Checks and Adjustments
6-1

Spark Plug Removal
6-1

Test Compression
6-1

Service and Install Spark Plugs
6-2

Service Ignition System
6-3

Service Battery
and
Battery Cables
6-5

Service Delcotron
and
Regulator
6-5

Service
Fan
Belt
6-5

Service Manifold Heat Valve
6-5

Tighten Manifold
6-5

Service Fuel Lines
and
Fuel Filter ..........
6-6

Service Cooling System
6-6

Check and Adjust Accelerator Linkage
6-6

Service Crankcase Ventilation
6-6

Service
Air
Injection Reactor System
6-6

Choke Adjustment
6-7
Page

Instrument Cheek-Out
6-7

Instrument Hook-Up.
. 6*7

Check and Adjust Dwell
6-7

Check Dwell Variation
6-7

Check and Adjust Timing
6-8

Adjust Idle Speed
and
Mixture
6-8

Additional Checks and Adjustments
. 6-8

Testing Crankcase Ventilation Valve
. 6-8

Testing Cranking Voltage
6-8

Cylinder Balance Test
. 6-8

Battery
6-8

Ignition
; 6-8

Carburetor
6-11

Fuel Pump
6-11

Cooling System
. 6-11

Cylinder Head Torque and Valve Adjustment
..... 6-11

GENERAL DESCRIPTION

The engine tune up
is
important
to the
modern automo-

tive engine with
its
vastly improved power and perform-

ance.
The
higher compression ratios, improved electri-

cal systems
and
other advances
in
design, make today1 s

engines more sensitive
and
have
a
decided effect
on

power, performance and fuel consumption.

It
is
seldom advisable
to
attempt
a
tune up
by
correc-

tion
of one or two
items only. Time will normally
be

saved
and
more lasting results assured
if the
technician

will follow
a
definite
and
thorough procedure
of
analysis

and correction
of all
items affecting power, performance

and economy.

The tune
up
will
be
performed
in
two parts.
The
first

part will consist
of
visual and mechanical checks and
ad-

justments;
the
second part will consist
of
an instrument

checkout that
can be
performed with
any one of the
units
of service equipment available
for
this purpose. Always

follow
the
instructions provided
by the
manufacturer
of

the particular equipment
to be
used.

Additional checks
and
adjustments
are
included
in the

latter part
of
this section
for use as
required. Many
of

these operations
can be
used
to
isolate and correct trou-

ble located during
the
tune up. Where conditions
are
UB-

covered requiring major corrective action, refer
to the

appropriate section
of
this manual
or the
Passenger

Chassis Overhaul Manual
for
detailed service informa-

tion.

Typical illustrations
and
procedures
are
used except

where specific illustrations
or
procedures
are
necessary

to clarify
the
operation. Illustrations showing bench
op-

erations
are
used
for
clarification however
all
operations

can
be
performed
on the
vehicle.

MECHANICAL CHECKS
AND
ADJUSTMENTS

Spark Plug Removal

Remove any foreign matter from around spark plugs
by

blowing
out
with compressed
air,
then disconnect wires

and remove plugs.

Test Compression
(Fig. 1)

The compression check
is
important because
an
engine

with
low or
uneven compression cannot
be
tuned success-
fully.
It is
essential that improper compression
be cor-

rected before proceeding with
the
engine tune
up.

1.
Remove
air
cleaner
and
block throttle
and
choke
in

wide open position.

2.
Hook
up
starter remote control cable
and
insert

compression gauge firmly
in
spark plug port.

CAUTION: Whenever
the
engine
is
cranked

CHEVROLET
C*
IS SERVICE MANUAL

ENGINE 6-2

remotely at the starter, with a special jumper

cable or other means, the primary distributor

lead must be disconnected from the negative

post on the coil and the ignition switch must be

in the "ON" position. Failure to do this will

result in a damaged grounding circuit in the

ignition switch.

3.
Crank engine through at least four compression

strokes to obtain highest possible reading.

4.
Check and record compression of each cylinder.

5.
If one or more cylinders read low tor uneven, inject

about a tablespoon of engine oil on top of pistons

in low reading cylinders (through spark plug

port).
Crank engine several times and recheck

compression.

• If compression comes up but does not necessarily

reach normal, rings are worn.

• If compression does not improve, valves are

burnt, sticking or not seating properly.

• If two adjacent cylinders indicate low compres-

sion and injecting oil does not increase compres-

sion, the cause may be a head gasket leak between

the cylinders. Engine coolant and/or oil in cylin-

ders could result from this defect.

NOTE: If a weak cylinder cannot be located

with the compression check, see "Cylinder Bal-

ance Test" under "Additional Checks and Adjust-

ments" in this section.

Service and Install Spark Plugs (Fig. 2)

1.
Inspect each plug individually for badly worn elec-

trodes,
glazed, broken or blistered porcelains and

replace plugs where necessary. Refer to spark plug

diagnosis information presented in Section 6Y for an

analysis of plug conditions.

2.
Clean serviceable spark plugs thoroughly, using an

abrasive-type cleaner such as sand blast. File the

center electrode flat.

3.
Inspect each spark plug for make and heat range. All

plugs must be of the same make and number.

4.
Adjust spark plug gaps to specifications using a

round feeler gauge.
PORCELAIN

INSULATOR

INSULATOR CRACKS

OFTEN OCCUR HERE

CENTER ELECTRODE

[FILE FLAT WHEN

ADJUSTING GAP-

[DO NOT BEND!
(PROPER GAP)

(BEND TO ADJUST GAP)

CAUTION:

adjust gap.
Fig.
2 - Spark Plug Detail

Never bend the center electrode to

Always adjust by bending ground or

side electrode.

If available, test plugs with a spark plug tester.

Inspect spark plug hole threads and clean before in-

stalling plugs. Corrosion deposits can be removed

with a 14 mm. x 1.25 SAE spark plug tap (available

through local jobbers) or by using a small wire brush

in an electric drill. (Use grease on tap to catch

chips.)

ADJUST DWELL

ANGLE SETTING OR

POINT OPENING

Fig.
1 - Checking Compression
Fig.
3 - Distributor (In Line)

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE
6-3

(ROUND) Y~~fll^H

CENTRIFUGAL
A ^k

ADVANCE--jflgKpl

MECHANISM
UB|

CAM
KSK^2

LUBRICATOR
VlSMi

REPLACEMENT
^BK

-^ADJUST
SQUARELY

AND
JUST

TOUCHING
LOBE

OF
CAM
/ROTOR

HBB
__

I^BH^F
?
(SOUARE)

^K^ I /—
CAM

jKft^J / LUBRICATOR

H^T^
CAUTION!

QV NEVER
OIL

•L-^
CAM LUBRICATOR-

REPLACE
WICK

WHEN
NECESSARY
LATERAL

MISALIGNMENT
PROPER

LATERAL ALIGNMENT

Fig.
4- Distributor (V8)

CAUTION: Use extreme care
-when
using tap to

prevent cross threading. Also crank engine sev-

eral times to blow out any material dislodged

during cleaning operation.

7. Install spark plugs with new gaskets and torque to

specifications.

NOTE:
The following are some of the

greatest causes of unsatisfactory spark plug

performance.

•
Installation of plugs with insufficient torque to

fully seat the gasket.

•
Installation of the plugs using excessive torque

which changes gap settings.

•
Installation of plugs on dirty gasket seal.

•
Installation of plugs into corroded spark plug hole

threads.

8^ Connect spark plug wiring.

Service
Ignition System

1.
Remove distributor cap, clean cap and inspect for

cracks, carbon tracks and burned or corroded ter-

minals. Replace cap where necessary.

2.
Clean rotor and inspect for damage or deterioration.

Replace rotor where necessary.

3.
Replace brittle, oil soaked or damaged spark plug

wires.
Install all wires to proper spark plug. Proper

positioning of spark plug wires in supports is impor-

tant to prevent cross-firing.

4.
Tighten all ignition system connections.

5. Replace or repair any wires that are frayed, loose or

damaged.
Us
CORRECT
LATERAL MISALIGNMENT BY

j BENDING
FIXED CONTACT SUPPORT

[NEVER
BEND BREAKER LEVER

Fig.
5 - Point Alignment

Magnetic
Pulse(Breakerless)
Distributor

There are no moving parts in the ignition pulse ampli-

fier, and the distributor shaft and bushings have perma-

nent type lubrication, therefore no periodic maintenance

is required for the magnetic pulse ignition system. Refer

to Section 6Y for an analysis of problems and/or repair

procedures encountered on the Transistorized (Magnetic

Pulse) ignition system.

Standard
(Breaker Point) Distributor
(Figs.
3 or 4)

1.
Check the distributor centrifugal advance mechanism

by turning the distributor rotor in a clockwise direc-

tion as far as possible, then releasing the rotor to

see if the springs return it to its retarded position.

If the rotor does not return readily, the distributor

must be disassembled and the cause of the trouble

corrected.

2.
Check to see that the vacuum spark control operates

freely by turning the movable breaker plate counter-

clockwise to see if the spring returns to its retarded

position. Any stiffness in the operation of the spark

control will affect the ignition timing. Correct any

interference or binding condition noted.

3.
Examine distributor points and clean or replace if

riecessary.

DO
NOT SUCK

IN
TOO MUCH

ELECTROLYTE

TAKE
READING

AT
EYE LEVEL

Fig.
6 - Testing Specific Gravity of Battery

CHEVROtET
CHASSIS SERVICE MANUAL