1967 CHEVROLET CAMARO service indicator

ENGINE 6-22

the camshaft gear (fig. 15L).

7.
Remove the camshaft and gear assembly by pulling it

out through the front of the block.

NOTE: Support camshaft carefully when re-

moving so as not to damage camshaft bearings.

Installation

1.
Install the camshaft and gear assembly in the engine

block, being careful not to damage camshaft bearings

or camshaft.

2.
Turn crankshaft and camshaft so that the valve tim-

ing marks on the gear teeth will line up (fig. 15L).

Push camshaft into position. Install camshaft thrust

plate-to-block bolts and torque to specifications.

3.
Check camshaft and crankshaft gear run out with a

dial indicator (fig. 16L). The camshaft gear"run out

should not exceed,.004" and the crankshaft gear run

out should not exceed
.003".

4.
If gear mm out is excessive, the gear will have to be

removed and any burrs cleaned from the shaft or the

gear will have to be replaced.

5.
Check the backlash between the timing gear teeth

with a dial indicator (fig. 17L). The backlash should

not be less than .004" nor more than .006".

6. Install fuel pump as outlined in Section 6M.

7.
Install grille as outlined in Section 13.

8. Install crankcase front cover as outlined.

9. Install radiator as outlined in Section 13.

10.
Install valve lifters as outlined.

TIMING GEARS

Replacement

With camshaft removed, crankshaft gear may be re-

moved using Tool J-8105 (fig. 18L). To install crankshaft

gear use Tool J-5590 (fig. 19L). For camshaft gear re-

placement, refer to Section 6, "Camshaft Disassembly"

of the Overhaul Manual.
Fig.
18L
- Removing Crankshaft Gear

Fig.
19L- Installing Crankshaft Gear

FLYWHEEL

Removal

With transmission and/or clutch housing and clutch re-

moved from engine, remove the flywheel.

Installation

1.
Clean the mating surfaces of flywheel and crankshaft

to make certain there are no burrs.

2.
Install flywheel on crankshaft and position to align

dowel hole of crankshaft flange and flywheel (fig.

20L).

NOTE: On Automatic Transmission equipped

engines, the flywheel must be installed with the

flange collar to transmission side (fig. 20L).

3.
Install bolts and torque to specifications.

SYNCHROMESH
CONVERTER

BOLT AREA -

DEPRESSED
•RING

GEAR

TRANS.,

AUTOMATIC

Fig. 17L
—
Checking Timing Gear Backlash
Fig. 20L r Flywheel Installation (Typical)

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-36

Fig.
23V - Installing Crankshaft Sprocket

(283,
327
and
350)

8* Draw camshaft sprocket onto camshaft, using the

three mounting bolts. Torque to bolt specifications.

9. Lubricate timing chain with engine oil.

10.
Install crankcase front cover and torsional damper

as outlined.

CAMSHAFT

Measuring Lobe Lift

NOTE: Procedure is similar to that used for

checking valve timing. If improper valve opera-

tion is indicated, measure the lift of each push

rod in consecutive order and record the

readings.

1.
Remove valve mechanism as outlined.

2.
Position indicator with ball socket adapter on push

rod (fig. 26V).

3.
Rotate the crankshaft damper slowly in the direction

of rotation until the lifter is on the heel of the cam

lobe.
At this point, the push rod will be in its lowest

position.
Fig.
25V- Installing Timing Chain

Fig.
24V - Installing Crankshaft Sprocket

(396 and 427)
Fig.
26V - Measuring Camshaft Lobe Lift

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-37

Fig.
27V—Removing Camshaft

4.
Set dial indicator on zero, then rotate the damper

slowly, or attach an auxiliary starter switch and

"bump" the engine over, until the push rod is in the

fully raised position.

CAUTION: 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 dam-

aged grounding circuit in the ignition switch.

5.
Compare the total lift recorded from the dial indica-

tor with specifications.

6. Continue to rotate the crankshaft until the indicator

reads zero. This will be a check on the accuracy of

the original indicator reading.

7.
If camshaft readings for all lobes are within specifi-

cations, remove dial indicator assembly.

8. Install and adjust valve mechanism as outlined.

Removal

1.
Remove valve lifters as outlined.

2.
Remove crankshaft front cover as outlined.

3.
Remove grille as outlined in Section 13.

4.
Remove fuel pump push rod as outlined * in Sec-

tion 6M.

5.
Complete camshaft removal as follows:

CAUTION: All camshaft journals are the same

diameter and care must be used in removing

camshaft to avoid damage to bearings.

Remove camshaft sprocket to camshaft bolts then

remove sprocket and timing chain together. Sprocket

is a light fit on camshaft. If sprocket does not come

off easily a light blow on the lower edge of the

sprocket (with a plastic mallet) should dislodge the

sprocket.

Install two 5/16" - 18 x 4" bolts in camshaft bolt

holes then remove camshaft (fig. 27V).

Installation

NOTE: Whenever a new camshaft is installed
CONVERTER

BOLT AREA -

DEPRESSED

SYNCHROMESH
RING

GEAR

TRANS.,

AUTOMATIC

Fig.
28V - Flywheel Installation (Typical)

coat camshaft lobes with Molykote or its

equivalent.

1.
Lubricate camshaft journals with engine oil and in-

stall camshaft.

2.
Install timing chain on camshaft sprocket. Hold the

sprocket vertical with the chain hanging down, and

orient to align marks on camshaft and crankshaft

sprockets. Refer to Figure 20V.

3.
Align dowel in camshaft with dowel in hole in cam-

shaft sprocket then install sprocket on camshaft.

Refer to Figure 25V.

4.
Draw the camshaft sprocket onto camshaft using the

mounting bolts. Torque to specifications.

5.
Lubricate timing chain with engine oil.

6. Install fuel pump push rod as outlined in Section 6M.

7.
Install grille as outlined in Section 13.

8. Install crankcase front cover as outlined.

9. Install valve lifters as outlined.

FLYWHEEL

Removal

With transmission and/or clutch housing and clutch

removed from engine, remove the flywheel.

Installation

1.
Clean the mating surfaces of flywheel and crankshaft

to make certain there are no burrs.

2.
Install flywheel on crankshaft and position to align

dowel hole of crankshaft flange and flywheel (fig.

28V).

NOTE: On Automatic Transmission equipped

engines, the flywheel must be installed with the

flange collar to transmission side (fig. 33V).

ENGINE MOUNTS

Engine mounts (fig. 34V) are the nonr adjustable type

and seldom require service. Broken or deteriorated

mounts should be replaced immediately, because of the

added strain placed on other mounts and drive line

components.

Front Mount Replacement

1.
Remove nut, washer and engine mount through-bolt.

2.
Raise engine to release weight from mount.

3.
Remove mount from engine.

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-40

SPECIAL TOOLS

Fig.
2T - Engine Special Tools

1. J-4536

2.
J-1264

J-8058

J-5853

3.
J-8087

4.
J-8001

5.
J-7316

6. J-8037

7.
J-8020

J-8021

J-8032

J-22249

J-22147

J-22250

8. J-6994

9. J-9510

10.
J-5239

J-6305

J-8062

J-8101

J-5830

J-7049

14.
J-8089
11.

12.

13.
Engine Lift Kit

(0-200 ft. Ib.) Torque Wrench

(0-50 ft. Ib.) *

(0.-100 in. Ib.)

Indicator Set (Cylinder Bore)

Indicator Set (Universal)

Belt Tension Gauge

Piston Ring Compressor

(3 9/16") Piston Ring Expander

(3 7/8")

(4")

(3 15/16")

(4 3/32")

(4 1/4")

Piston Pin Assembly Tool

Piston Pin Assembly Tool

(3/8") Connecting Rod Guide Set

01/32") m

Valve Spring Compressor

Valve Guide Cleaner

(11/32") Valve Guide Reamer Set

(3/8")

Carbon Removing Brush
. 15. J-5860

16.
J-5715

J-6036

17.
J-6880

18.
J-5802

19.
J-9534

20.
J-9535

21,
J-22144

22.
J-8369

23.
J-6098

24.
J-0971

25.
J-6978

26.
J-22197

27.
J-21058

28.
J-1619

29.
J-5825

30.
J-8105

31.
J-5590

32.
J-0966

33.
J-21742

34.
J-22102

35.
J-8340

36.
J-5595
Cylinder Head Bolt Wrench

(.003") Rocker Arm Stud Reamer

(.013")

Rocker Arm Stud Installer

Rocker Arm Stud Remover

Distributor Lower Bushing Remover

Distributor Lower Bushing Installer

Oil Pick-up Screen Installer

Oil Pick-up Screen Installer

Cam Bearing Tool

Camshaft Gear Support

Torsional Damper Puller

Torsional Damper Installer

Torsional Damper and Sprocket Installer

Crankshaft Sprocket Puller

Crankshaft Sprocket Puller

Crankshaft Gear Puller

Crankshaft Sprocket or Gear Installer

Crankcase Cover Centering Gauge

Crankcase Cover Centering Gauge

Crankcase Cover Tool

Grankcase Cover Seal Installer

Crankcase Cover Seal Installer

CHEVROLET CHASSIS SERVICE MANUAL

SECTION 6Y

ENGINE ELECTRICAL

CONTENTS
OF
THIS SECTION

Page

System

6Y-19
6Y-32

6Y-34

BATTERY

INDEX

Page

General Description 6Y_i

Types of Batteries 6Y-1

Dry Charged Batteries 6Y-2

Activating Dry Charged Batteries 6Y-2

Wet Charged Batteries 6Y 2

Periodic Service 6Y-3

Common Causes of Failure 6Y-3

Delco Eye 6Y_3

Electrolyte Level
AY
3

Water Usage ] \ 6Y_3

Cleaning 6Y_4

Cables 6Y_4

Carrier and Holddown 6Y-4
Page

Safety Precautions 6Y-4

Charging Procedures . . gY_4

Slow Charging gY-4

Fast Charging . * 6Y-4

Emergency Boost Charging 6Y-4

Test Procedures QY-S

Visual Inspection 6Y-5

Instrument 6Y-5

Full Charge Hydrometer Test. 6Y-5

Specific Gravity Readings 6Y-5

Cell Comparison Test . 6Y-5

Installing Battery 6Y-5

GENERAL DESCRIPTION

The battery (fig. lb) is made up of a number of separ-

ate elements, each located in an individual cell in a hard

rubber case. Each element consists of an assembly of

positive plates and negative plates containing dissimilar

active materials and kept apart by separators. Hie ele-

ments are immersed in an electrolyte composed of dilute

sulfuric acid. Plate straps located on the top of each ele-

ment connect all the positive plates and all the negative

plates into groups. The elements are connected in series

electrically by connectors that pass directly through the

case partitions between cells. The battery top is a one-

piece cover of hard rubber construction. Tfte cell con-

nectors, by-passing through the cell partitions, connect

the elements along the shortest practical path (fig. 2b).

With the length of the electrical circuit inside the

Battery reduced to a minimum, the internal voltage drop

is decreased resulting in improved performance, par-

ticularly during engine cranking at low temperatures.

The hard, smooth one-piece cover greatly reduces the

tendency for corrosion to form on the top of the Battery.

The cover is bonded to the case with sealing compound

that forms an air tight seal between the cover and case.

Protection for the Battery charging circuit (10 gage

wire) is provided by a pigtail lead which is a fusible Hnk

off the battery positive cable (14 gage wire). This lead is

an integral part of the Battery cable assembly and serv-

icing requires replacing the complete cable assembly.

TYPES
OF
BATTERIES

There are two types of Batteries—the "dry charge"

type and the "wet charge" type. The difference in types

depends on the method of manufacture.
ONE PIECE

CELL COVER

VENT PLUG
ELECTROLYTE LEVEL

INDICATOR

HOLD-DOWN SLOT

Fig.
lb—Battery

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE-EIECTRICAI 6Y-3

PERIODIC SERVICING

Since the Battery is a perishable item which requires

periodic servicing, a good maintenance program will

insure the longest possible Battery life.

COMMON CAUSES OF FAILURE

If the Battery tests good but fails to perform satis-

factorily in service for no apparent reason, the following

are some of the more important factors that may point to

the cause of the trouble.

1.
Vehicle accessories inadvertently left on overnight to

cause a discharged condition.

2.
Slow speed driving of short duration, to cause an

3.
undercharged condition.

A vehicle

capacity.
electrical load exceeding the generator

4.
Defect in the charging system such as high resist-

ance, slipping fan belt, faulty generator or voltage

regulator.

5. Battery abuse, including failure to keep the Battery

top clean, cable clamps and posts clean and tight,

and improper addition of water to the cells.

LEVEL INDICATOR

The Battery features an electrolyte level indicator,

which is a specially designed vent plug with a transparent

rod extending through the center (fig. 5b). When the elec-

trolyte is at the proper level, the lower tip of the rod is

immersed, and the exposed top of the rod will appear

very dark; when the level falls below the tip of the rod,

the top will glow. ,

The Indicator reveals at a glance if water is needed,

without the necessity of removing the vent plugs (fig. 6b).

The Level Indicator is used in only one cell (second

cell cap from positive Battery post) because when the

electrolyte level is low in one cell, it is normally low in

all cells. Thus when the Indicator shows water is needed,

check the level in all six cells.

An alternate method of checking the electrolyte level is

to remove the vent plug and visually observe the electro-

lyte level in the vent well. The bottom of the vent well

features a split vent which will cause the surface of the

electrolyte to appear distorted when it makes contact.

The electrolyte level is. correct when the distortion first

appears at the bottom of the split vent (fig. 4b).

ELECTROLYTE LEVEL

The electrolyte level in the Battery should be checked

regularly. In hot weather, particularly during trip driv-

ing, checking should be more frequent because of more

rapid loss of water. If the electrolyte level is found to be

low, then colorless, odorless, drinking water should be

added to each cell until the liquid level rises to the split

vent located in the bottom of the vent well. DO NOT

OVERFILL because this will cause loss of electrolyte

resulting in poor performance, short life, and excessive

corrosion.

CAUTION: During service only water should be

added to the Battery, not electrolyte.

The liquid level in the cells should never be allowed to

drop below the top of the plates, as the portion of the
INDICATOR

ELECTROLYTE LEVEL

CORRECT

Fig.
5b—Cut-Away View Showing Electrolyte at Proper Level

with Indicator Having Dark Appearance

plates exposed to air may be permanently damaged with a

resulting loss in performance.

WATER USAGE

Excessive usage of water indicates the Battery is being

overcharged. The most common causes of overcharge

are high Battery operating temperatures, too high a volt-

age regulator setting, poor regulator ground wire con-

nection. Normal Battery water usage is approximately

one to two ounces per month per battery.

INDICATOR

Fig.
6b—Cut-Away View Showing Electrolyte at Low Level

with Indicator Having Light Appearance

CHASSIS SBtVKZ MANUAL

ENGINE-ELECTRICAL 6Y-7

CHARGING SYSTEM

INDEX

Page

General Description . 6Y-7

Maintenance and Adjustments 6Y-9

Static Checks . 6Y-10

System Condition Check and Voltage

•Regular Adjustment. 6Y-10

General Output 6Y-11

Generator Diode and Field Test 6Y-12

Indicator Lamp-Initial Field Excitation

Circuit Tests . 6Y-12
Page

Field Circuit Resistance Wire Tests 6Y-13

Field Relay Test and Adjustment 6Y-14

Other Harness Checks 6Y-14

Service Operations 6Y-14

Generator 6Y-14

Removal and Installation 6Y-14

Pulley Replacement. 6Y-14

Brush Replacement (6" Delcotron). 6Y-15

Double Contact Regulator . . . . . . 6Y-16

GENERAL DESCRIPTION

The charging system includes the battery, generator,

regulator, telltale light, and necessary wiring to connect

these components. The Delcotron is offered as standard

equipment, although there are various capacities avail-

able on all models.

The Delcotron continuous output A.C. generator (fig.

lc) consists of two major parts, a stator and a rotor. The

stator is composed of a large number of windings as-

sembled on the inside of a laminated core that is attached

to the generator frame. The rotor revolves within the

stator on bearings located in each end frame. Two

brushes are required to carry current through the two

slip rings to the field coils wound concentric with the

shaft of the rotor. Six rectifier diodes are mounted in the

slip ring end frame and are joined to the stator windings

at three internally located terminals.

Diodes are mounted in heat sinks to provide adequate

heat dissipation. The six diodes replace the separately
mounted rectifier as used in other types of application.

The diodes change the Delcotron A.C. current to D.C.

current.

Two regulators (fig. 2c) are available on the 1967 vehi-

cles,
a double contact two unit type and a transistor

regulator. The function of these regulators in the charg-

ing system is to limit the generator voltage to a pre-set

value by controlling the generator field current. Both

regulators have an internal field relay unit. The relay

unit allows the telltale lamp to light (as a bulb check)

with the ignition key on and engine not running. When the

engine is started and the generator begins to charge, the

indicator light goes out indicating that the system is op-

erating normally.

The double contact regulator, when used with the

special 63 amp air conditioning model generator (4 ohm

field coil) uses a field discharge diode internally in the

field circuit (figs. 3c and 4c). The added diode adapts the

BRUSH AND

TERMINAL

ASSEMBLY

SLIP RINGS
SLIP RING

END FRAME

_\

THRU

BOLT
DRIVE END

FRAME

BEARING

BEARING

DIODES

ROTOR

5.5" SERIES ID DELCOTRON
STATOR

ASSEMBLY
GREASE

RESERVOIR

BRUSH

FAN ASSEMBLY

6.2" SERIES 2D TYPE 150 DELCOTRON

Fig.
lc—Delcotron Cross-section View

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE-ELECTRICAL 6Y-10

circuit. Make absolutely certain all connections in

the circuit are secure.

5.
Do not short across or ground any of the terminals

on the generator or regulator.

6. Do not attempt to polarize the generator.

7.
Do not disconnect lead at generator without first dis-

connecting battery ground cable.

Trouble in the A.C. charging system will usually be

indicated by one or more of the following conditions:

1.
Faulty indicator lamp or ammeter operation.

2.
An undercharged battery (usually evidenced by slow

cranking speeds).

3.
An overcharged battery (usually evidenced by exces-

sive battery water usage).

4.
Excessive generator noise or vibration.

Described below are a series of on-the-vehicle quick

checks which are designed to assist the service tech-

nician in locating troubles within the various components

of the engine electrical system. Additional checks, ad-

justments and overhaul procedures of these components

are also described in the "Charging Systems—Service

Operations Section" and should be referred to as

necessary.

STATIC CHECKS

Before making any electrical checks, perform the fol-

lowing static checks:

1.
Check for loose fan belt.

2.
Check for defective battery. (Refer to Battery).

3.
Inspect all connections, including the slip-on con-

nectors at the regulator and Delcotron.

NOTE: Do not short field to ground to check if

generator is charging since this will seriously

damage the charging system.

SYSTEM CONDITION TEST

This test is used .to indicate the overall condition of the

charging system (both good and defective) and to isolate

the malfunctioning unit if the system is defective.

NOTE: On Corvette models difficulty may be

encountered -when attempting to make the re-
quired test connections at the voltage regulator.

It is advisable to remove the regulator from its

mounting location to perform the necessary con-

nections at the regulator for the following tests

but make sure unit is grounded.

1.
With ignition off, perform the prescribed Static

Checks outlined in this section. Then set hand brake

and shift transmission
into
neutral.

2.
Connect a voltmeter from junction block relay to

ground at regulator base.

CAUTION: Be sure meter clip does not touch a

resistor or terminal extension under regulator,

3.
Connect a tachometer on engine.

4.
Models equipped with Indicator Lamp: Turn ignition

switch on "ON" position and check indicator lamp.

If lamp fails to glow, perform appropriate tests and

corrections (Indicator Lamp Circuit Tests) before

continuing.

Models equipped with Ammeter: Turn ignition

switch to "ACC" with an accessory on and check

ammeter. If ammeter fails to read discharge, check

ammeter circuit before continuing.

5.
Models equipped with Indicator Lamp: If lamp glows,

start the engine and run' it at 1500 rpm or above.

Check indicator lamp. If lamp fails to go out, per-

form appropriate test and corrections (Indicator

Lamp Circuit Test) before continuing.

Models equipped with Ammeter: If ammeter reads

discharge, start the engine and observe ammeter. If

meter fails to move toward charge (from original

position), perform appropriate test and corrections

(Field Circuit Tests) before continuing.

NOTE: At this point a field circuit has been

established and any other problem will lie in

generator or regulator.

6. Turn on high-beam headlights and heater blower

motor to high speed, run engine at or above 1500

rpm (for a few minutes, if necessary) and read the

voltage on meter.

AIR GAP

ADJUSTING NUT

ONLY

ADJUSTING SCREW

(Turn To Adjust

Voltage Setting)

Fig.
6c—Adjusting Voltage Setting

CHEVROLET CHASSIS SERVICE MANUAL