engine DATSUN 510 1968 Service Repair Manual

CON1EN1S

CHAPTER
ONE

GENERAL
INFORMATION

Introduction

Model
Identification

CHAPTER
TWO

PERIODIC

MAINTENANCE

RoutIne
checks

Pen
odic
checks

CHAPTER
THREE

TROUBLESHOOTING

EqUIpment

Starter

ChargIng
system

EngIne

Igmtlon

system

Fuel

system

Exhaust

emIssIon
control

CHAPTER

FOUR

ENGINE
AND
IGNITION
TUNE
UP

EqUIpment

Battery

Spark
plugs

DIstrIbutor

Igmtlon

timIng

CHAPTER
FIVE

ENGINE
LUBRICATION
SYSTEM

Descnptlon

Lubncation

cIrcuIt
SpecIficatiOns
and
dImensIons

EngIne
lubncation
and

maIntenance

Recommended
lubncants

Clutch

TransmIssiOn

Brakes

Steenng
and

suspension

TIre
wear

analysIs

Wheel

balancIng

Idle

speed
and
Idle

mIXture

Dwell

angle
setting

CompressIon
test

Valve
clearance

adjustment

AddlllOnal
checks

Oil

pump
I

6

t
1

4

V

9
t

1

20

27

II

CHAPTER
SIX

ENGINE

Cylmder
block

Crankshaft

PistOns
and

connectmg
rods

Cyhnder
head

Camshaft

Valve
mechamsm

Camshaft
dnve

Mamfolds

011

pump

Fuel

pump
Carburetor

Emission
control
devIces

Engme
removal

Engme
dISassembly

Pistons
and

connectmg
rods

Cyhnder
head

Engme
mspectIon
and

replllr

Engme
reassembly

Service
data
and

speCifications

CHAPTER
SEVEN

FUEL
SYSTEM

Air
cleaner

Fuel
strlllner

Fuel

pump
Carburetor

Fuel
tank

1
CHAPTER

EIGHT

COOLING

SYSTEM

DescnptIon

Water

pump

Fan
clutch
Thermostat

Radiator

CHAPTER
NINE

ENGINE

ELECTRICAL
SYSTEM

Starter

Overrunmng
clutch

assembly

ChargIng
ClrcUlt

Alternator

Alternator

output

Voltage
regulator
DIstrIbutor

Condenser

Igrntlon
cod

SpeCifications

Spark
plugs

CHAPTER

TEN

EMISSION

CONTROL

SYSTEM

Exhaust
emiSSIOn

control

Crankcase

emission
control

Air

mJectlon
system
Engme
modifications

Evaporative
emiSSion
control

Exhaust

system

CHAPTER
ELEVEN

CLUTCH

TRANSMISSION
AND
DRIVESHAFT

Clutch

TransmissIon

Master

cyhnder
TransmissIon
data
and

speCIfications

Operating
cyhnder
Dnveshaft

Withdrawal
lever

adjustment
Dnveshaft
data
and

speCIfications

Clutch

system

bleedmg
Automatic
transmIssIon
checks

Clutch
data

and

speCIfications
31

62

84

91

114

127

CHAPTER
ONE

GENERAL
INFORMATION

This
manual

provides
maintenance
informa

tIon
on
the
Datsun
510
Series
and
521
Series
of

vehlcles
The
510
Series
includes
the
two
door

sedan
four
door
sedan
and
station

wagon
The

521
Senes
IS
the

pIck

up
truck

Coverage
is
from

1968

through
1972
models

All
models
use
the
L16

engme
a
96
horse

power
four

cylmder
overhead
camshaft

design

The
510
has
a

fully
synchronized
four

speed

manual
or
three

speed
automatic
transmisSIon

The
521
has
a
four

speed
manual
transmission

only
In
1972

horsepower
ratIng
was

lowered

to
92

horsepower
due
to

changes
m
emission

control
device

requirements
Figure
1
is

an
over

all
view
of
the
four
door
sedan

Figure
2
shows

the

station

wagon
and

Figure
3
illustrates
the

pick
up
truck

Over
the

years
the
510
and
521
series
have

remained

essentIally
the
same
with
the

excep

tion
of

changes
to
the

emISsion
control

systems

and
overall

body
stylmg
In
this
manual

every

effort
has
been
made
to

pinpoint
significant
c
if

ferences
between
model

years

The
use
of

SpecIal
tools
and
test

equipment

has
been
avoided
wherever

possible
When

necessary
special
tools
and
test

equipment
are

illustrated
either
in
actual
use
or
alone
A
well

equipped
mecharuc

may
find
he
can

substitute
similar
tools
or
make
his

own
to
fulfill
a
e

Ii

ment

Recommendations
are

occasionally
made
to

refer
servIce
or
mamtenance
to
a
Datsun
dealer

or
a

SpecIaliSt
in
a

specIfied
field
In
these
cases

work
WIll

probably
be
done
more

qUlckly
and

economIcally
than
if
the
mecharuc

performs

them
himself

MODEL
IDENTIFICATION

Body
Number
Plate

The

body
number
IS

stamped
on
the
fire
wall

in
the

engine
compartment
The
numbers

give

the
chasSIS
model
and
serial
number

Model
Identification
Plate

The
model
Identification

plate
Figure
4
is

mounted
WIthin
the

engine

compartment
TIns

plate
gIves
engine
number
and
veh1cle

number

Engine
Identification

The

engine
identrlicatlon

marking
is

stamped

on
the

right
hand
SIde
of
the

cylinder
block

just

below
the
third
and
fourth

sp8l
k

plugs

Model
Identification
Numbel
ll

The

following
numbers
have
been

assigned
to

the
510
and
52
I
Series

vehicles

oj

4

CHAPTER
ONE

chassIs

number
Write
the
numbers
down
and

carry
them
ill

your
wallet

Service
Hints

Throughout
thIs

manual
keep
two
conven

bons

ill
mmd
Front
refers
to
the
front
of
the

vehicle
The
left
and

nght
sides
of
the

ve

hicle
refer
to
a

person
sittIng
ill
the

car

facing

forward
For

example
the

steenng
wheelIS

on

the
left
hand
Side
All
dimensIOns
and

capacities

are
expressed

ill
units
fanuhar

to
a
Umted

States

mechaniC
such
as
illches
and

pounds
Metric

measurements

are
also

given
Metnc

tools
are

reqUITed
to
work

on
the
Datsun
CD

DATSUN

IENGINE
CAPACITY

IMAX
HP
RPM

IWHEELBASE

IENGINE
NUMBER

FAR
NO

NlSSAN

MOTOR

co
LTD

YOKOHAMA
JAPAN
TYPEI
510

1595
cc

961P
6600

rpm

mm

L

1
00988

P61
l
O
1
l
M

Table
1
MAIN
SPECIFICATIONS

AND
DIMENSIONS

r
ITEM
Sedan

Wagon
Plm

up

EnglDe
Type
L16

L16
L16

Valve

Arrangement
Overhead

Cam
Overhead
Cam
Overhead
Cam

Bore
3
26n
ID
83mm

3
2677
ID
83mm
3
2677
ID
83mm

Stroke
2902
ID

73
7mm
2
902
ID

73
7mm
2
902
In

73
7mm

Displacement
97
3
cu
ID

l595cc
97
3
cu
In

l595cc
97
3
cu
ID
1595cc

CompressIOn
Ratio
851

851
851

MaXimum
SAE

Hompower
96

@
5

600

rpm
96

@
5
600

rpm
96

@
5
600

rpm

MaXimum
SAE

Torque
998ft
Ib
138

kg
m
998ft
Ib
138

kg
m

9911
ft
Ib
138

kg
m

Fuel
Octane
85

85
85

Lengtb
1622
ID

4
12Omm
163
2
ID
4
I45mm
168
9
ID
4
290mm

Width

61
4
ID

l
560mm
61
4
ID
1
560mm
62
8
In

Cl
595mm

Height
55
lID
1
400mm
565
ID

Cl
435mm
60
8
ID

Cl
545mm

Wheelbase

95
3
ID

2
42Omm

95
3
ID

2
420mm
99
6
In

2
530mm

Room

Space

Inner

Length
63
3
In
1
61Omm
673
ID

1
710mm
72
8
ID

1
850mm

Inner
Width

499
ID
1
27Omm

507
ID

1
29Omm
563
In

1
430mm

Inner

Height
44
4
In
1
130mm

44
61D
1
135mm
15
7
ID

399mm

Tread

Front

50
4
ID

28Omm
502
In
1
275mm
492
In
1
250mm

Rear
504
In

1
280mm
496
In

Cl
260mm
499
ID
1
267mm

Road

Clearance
741n

l88mm
64
ID
l63mm
787
ID
200mm

Weight

4

Speed
2
0611b
935

kg
2
138
Ib

970

kg
2
127
Ib
965

kg

Automatic

2
114Ib
959

kg
2
182
Ib
990

kg

Minimum

Turning
RadiUS
157ft
48m

157ft
48m
171
ft
52m

Seating

Capaaty
5

5
2

Battery

Volt

12

12
12

Capacity
400rSOAH

400r50AH
40
or
60
AH

Connection

Negative
ground
Negative
ground
Negative
ground

Fuel

Tank

Capaaty
11

9

gal
45
liter
11
9

gal
45
liter
108

gal

41J
r

011

Pan

Capacity
42

qts
40

liter
4
2

qb
40
liter

1
06

gal
40
Iller

011
Filter

Capaaty
74

ql
07
liter
74

ql
0
7
liter
1
48

Pint
0
7
liter

Transmission

Capaaty
1
8

ql
1
7
liter

18

ql
1
7
Iller
2
11

qt
20
Iller

Dlflerenbal

Capaaty
85

ql
80
liter
11

ql
1
0
liter
87

ql
0
83
lIter

Coolant

Capaaty
7
2

ql
6
8
liter
7
2

ql
6
8
lIter
7
2

qt
6
8
Iller

Clutch

Type

Dry
Single
diSC

Dry
slDgle
diSC

Dry
slDgle
diSC

Draphragm
spnng
Diaphragm

spnng
Diaphragm

spnng
l

CHAPTER
TWO

PERIODIC
MAINTENANCE

To
ensure

good
performance
dependability

and

safety
regular
penodlc
maintenance
is

necessary
TIns

chapter
outlInes
routine

and

penodlc
mamtenance
for
the

average
dnver

Under

heavy
usage
semcmg
mtervals
will
be

shortened

Regular
routme
mamtenance
will

help
aVOId

expensive
repaIrs

ROUTINE
CHECKS

The

followlDg
checks
should
be

performed
at

each
fuel

stop

1
Check

engme
oil
level

Top
up
as

requrred

2
Check
radiator
coolant
level

Top
up
as
re

qwred

3
Check

battery
electrolyte
The

battery
case

IS
marked
With

upper
hrmt
and
lower
lnmt
lInes

Level
should
be
maID
tamed

between
the
IIDes

4
Check
that
the
master

cylInder
brake
flwd

reservOir
level
IS
between
the
max
and
mm

lInes
marked
on
the

plastic
case

S

Check
the

plastic
clutch

cyhnder
reservoir

level
Level
should
be
between
the
max
and

mm
lInes

6
Check
the
windsh1eld
washer
flwd
reservoir

Top
up
as

required
7
Check
tire

pressures
when
the
tIres
are
cold

Front
and
rear
tire

pressures
should
be
24

pounds
under
normal

dnving
conditions
TIre

pressure
should
be
28

pounds
for

h1gh
speed

dnvmg
conditions

8
Check
the

engIne
for

general
conditIon

Check
for

leaky
or
cracked
hoses
and
loose

wmng

9
Check
condition
of
wmdshleld

wiper
blades

PERIODIC
CHECKS

Table

1

prOVIdes
penodIc
checks
and
main

tenance
that
should
be

performed
on
a
set

schedule
Table
2

gIves
recommended
lubncants

and
Table
3

specIfies
the

grades
of
oil
that
should

be
used
Procedures
for

performmg
the
semces

are

presented
ID
vanous

chapters
of
tlus
manual

Table
3
RECOMMENDED
GRADES
OF
OIL

Temperature
Engine
on

MS

Above
32
C
90

F
average
SAE
30
IOW
30

32
to
0
C
90

to
32

F
mlmmum
SAE
20
20W
IOW
30

O
to
12
C
32
tolO

F
mlRlmum
SAE
IOW
IOW
30

Below
12
C
10
F
mlmmum
SAE
lOW
IOW
30

PERIODIC

MAINTENANCE

7

Table
1
ENGINE

LUBRICATION
AND
MAINTENANCE

FREQUENCY
EVERY

E
E
E

E

E
E

E
Eo
00
00

00
00
00

00

00

gq
00

00

00

NO

t
r61li
0

CD

Check

engine
011
level

top
up
If

required
X

Change
engine
011
X

Lubricate

carburetor

hnkage
X

Lubricate
distributor
rotor
shaft
and
ann
shaft
X

Apply
grease
to
distributor
cam
heel
X

Check

radiator
coolant
level
X

Change
radIator
coolant
X

Change
radiator
coolant
additive

X

Check

battery

electrolyte
level
X

Check

specific
gravity
of

battery
X

Check

engine
starting
exhaust
color
X

Tighten

cyhnder
head

manifolds
and

pipe
flanges
X

Adjust
valve
clearance

X

Check

Ignition
timing
X

Tighten
carburetor

fittings
X

Check
fan
belt
tension
X

Check
for
011

pan
leakage
X

Tighten
engine
mounts
X

Check
fuel
strainer
X

Replace
fuel
strainer
X

Check
for
fuel
leaks
X

Replace
011
filter
X

Check

spark
plugs
X

Replace
spark
plugs
X

Check
dlstnbutor

cap
rotor
and

POints
X

Adjust
engine
Idle

speed
X

Check

air
cleaner

fittings
X

Clean
011
filler

cap
X

Clean

battery
cables
and
terminals

X

Check
alternator
and

voltage
regulator
function

X

Check

starter
motor
function

X

Replace
aIr
cleaner
element

X

Check
fuel

pump
function

X

Check

cyhnder

compressIon
X

Clean
carburetor

Jets
and
float
chamber

X

Check
dlstnbutor
condenser

X

Check
crankcase
ventilation
control
valve
X

8

CHAPTER
TWO

Table

2
RECOMMENDED
LUBRICANTS

Manufacturer

Shell

Mobil
Caltex
Esso
BP
Castro
Lubncatlng

pomts

BP

ngme

Single
Shell

Super
Moblloll
Havahne
Esso
Extra
ViscostatlC

Carburetor

grade
Motor
011

SpeCial
Custom
Motor
011

longUe
Castrollte

linkage

ngme
011
Shell
x

100
HD
made
IOW
30

Motor
011
or

IOW
30
Dlstnbutor

lOW
3D
IOW
30
lOW
3D
20W
40

ViscostatlC
shaft

Motor
011

Shell
Moblloll
Havallne

Castrol

Engine

Mulb

grade
x

100
Arcbc
or
RPM
Esso
Motor

BP
HD
20HD
Carburetor

ngme
011
30

20
or
Moblloll
Motor
011
30

Motor
011
30HD

hnkage

20W
lOW
A
or
AF
011
HD
lOW
20W

DIStributor

shaft

Mulb
Esso
Multl
BP
Castro

Shell
Mobil

purpose
nergrease
lease

DIstnbutor

purpose

Rellnax
A

Grease
Marfak

Grease
or
LM

eam
heel

Grease

Beacon

t

r

10
CHAPTER
THREE

pressure
bUllt

up
In
each

cylInder
The

readIngs

when

properly
Interpreted
IndIcate

general
cyl

Inder
and
valve
condltlOn

Vacuum

Gauge

The
vacuum

gauge
IS

easy
to
use
but
dIfficult

for
an

Inexpenenced
mechanIC
to

Interpret
The

results
when
conSIdered
WIth
other

findIngs
can

prOVIde
valuable
clues
to

pOSSIble
trouble

Connect
the
vacuum

gauge
WIth

a
T
connec

tIon
In
the
hose
from
the
carburetor
to
the

vacuum
advance
on
the
dIstnbutor
Start
the

engme
and
let
It
warm

up
thoroughly
Vacuum

readIng
should
be

steady
at
18
22
Inches

NOTE
Subtract
1
Inch

from

reading

for

every
1000

feet
of
altitude

Figure
1
shows
numerous

tYPical
readIngs

WIth

InterpretatIons
Results
are
not
conclusive

WIthout

companng
to
other
tests
such
as
com

preSSIOn
readIngs

Fuel
Pressure

Gauge

ThIS
Instrument

IS
VItal
for

evaluatIng
fuel

pump
performance
Often

a
vacuum

gauge
and

fuel

pressure
gauge
are
combIned

Dwell
Meter

A
dwell
meter
measures
the
dIstance
In
de

grees
of
cam
rotatIon
that
the
breaker

pOInts

remaIn
closed
while
the

engme
IS

runnIng
SInce

thIS

angle
IS
determmed

by
breaker

pOInt
gap

the
dwell

angle
IS
an
accurate
IndIcatIon
of

pOInt

gap
Many
tachometers
Intended
for

tunIng
and

testIng
Incorporate
a
dwell
meter
as
well
Follow

the
manufacturer
s
InstructIon
to
measure
dwell

on
the
Datsun

Tachometer

A
tachometer
IS
essential
for

tunIng
Datsuns

WIth
exhaust
emission
control
deVices

IgmtIOn

turung
and
carburetor

adjustments
must
be

per

formed
at
the

specified
Idle

speed
The
best
In

strument
for
thIS

purpose
IS
one
WIth

a

range
of

0
1
000
or
0
2
000

rpm
Extended

range
0

6
000
or
8
000
Instruments
lack

accuracy
at

lower

speeds
The
InStrument
should
be

capable

of

detecting
changes
of
25

rpm
Stroboscopic
Timing
Light

ThIS
Instrument

pernuts
accurate

IgnitIon

tImIng
By
f1ashmg
a

bght
at
the

preCISe
Instant

cylInder
No
1
fires
the

posItIon
of
the
crank

shaft

pulley
at
that
Instant

can
be
seen
Marks

on
the

pulley
bne

up
With

a
reference

pOInter
on

the
block

dunng
the

tIming
procedure
SUltable

bghts
are
neon
bulb

types
and
xenon
strobe

hghts
Neon

tunmg
bghts
are
ddticult
to
see
and

must
be
used
in

dImly
bt
areas
Xenon
strobe

bghts
can
be
used
In

bnght
sunbght
Use
the

bght
accordIng
to
the
manufacturer
s
InStruC

tIons

Exhaust

Analyzer

Of
all
Instruments
descnbed
here
this

IS
the

least

bkely
to
be
owned

by
a
home
mechanic

One
Instrument

samples
the
exhaust

gases
from

the

taIlpIpe
and
measures
the
thermal
conduc

tIVIty
of
the
exhaust

gas
SInce
different

gases

conduct
heat
at

varYIng
rates
thermal
conduc

tIVIty
of
the
exhaust
IS

a

good
IndIcatIon
of

gases

present
This
Instrument
IS
VItal
for

accurately

checkIng
the
effectIveness
of
exhaust
emIssion

control

adjustments
but
IS
too

expenSIve
for
an

amateur
mechanIC
to
conSIder

buying

STARTER

Starter

system
troubles
are

relatIvely
easy
to

ISolate
The

followmg
are
common

symptoms

and
cures

1

Engme
cranks

very
slowly
or
not
at
all

Turn
on
the

headhghts
If
the

bghts
are

very
dun

most

likely
the

battery
or
the

connecting
WireS

are
at
fault

Check
the

battery
using
the

pro

cedures
descnbed

in
the
Tune

up
chapter
Check

wmmgfur
e
s
wom
andd
connectIom

H
the

battery
and

connectIng
WIres
check

good
turn
the

headlIghts
on
and

try
to
crank
the

engIne
H
the

lIghts
dIDl

drastIcally
the
starter
is

probably
shorted
to

ground
Remove
the
starter

and
test
it

usmg
the

procedures
gIven
in

Chapter

NIne
If
the

lights
remain

bnght
or
dun

slIghtly

when

crankIng
the

engme
the
trouble

may
be
in

the
starter
solenOId
or

wmng
To
ISolate
the

trouble
short
the
two

large
solenoid
ternunals

together
not
to

ground
if
the
starter
cranks

normally
check
the
solenoid
and

wmng
up
to
the

12
CHAPTER
THREE

13
IMPROPER
IDLE

MIXTURE

Roats

slowly
between

13
17
14
SMALl
SPARK

GAP
or
DEFECTIVE

POINTS

Slight
float
between

14
16

ignItIOn
switch
If
the
starter
still
fails
to
crank

properly
remove
the
starter
and
test
it

2
Starter
turns
but
does
not

engage
with

engine

This
trouble
is

usually
a
defective

pInion
or
sole

noid

shlfting
fork

It

may
also
be
that
the
teeth

on
the

pInion
flywheel
ring
gear
or
both
are

worn
down
too
far
to

engage

properly

3
Starter

engages
but
will
not

dISengage
when

IgmtlOn
switch
IS
released

TIns
trouble
is

usually
caused

by
a

sticking
sole

nOid
but

occasionally
the

pmlOn
can

jam
on
the

flywheel
With
manual
transmissions
the

pinion

can
be

temporanly
freed

by
rockmg
the
car
in

high

gear
Naturally
this
IS
not

poSSible
in
auto

matics
the
starter
must
be
removed

4
Loud

grinding
noISes
when
starter
runs

TIns

usually
means
the
teeth
on
the

pinion

and
or

flywheel
are
not

meshing
properly
It

may
also
mean
the
over

running
clutch
IS
broken

In
the
first
case
remove
the
starter
and

examine

the

gear
teeth
In
the
latter
remove
the
starter

and

replace
the

pmion
dnve

assembly

CHARGING
SYSTEM

Charging
system
troubles

may
be
in
the
alter

nator

voltage
regulator
or
fan
belt
The
follow

ing
symptoms
are

typical

1
Alternator

warning

lamp
does
not
come
on

when

IgmtlOn
is

turned
on

This

may
indicate
a
defective

ignition
switch

battery
voltage

regulator
or

lamp
Frrst

try
to
15
HEAD
GASKET

LEAK

Roats
between
5
19
16
RESTRICTm

EXHAUST
SYSTEM

Normal
when
first

started

Drops
to
0
as

rpm
Increases

May

eventually
rrse
to

about
16

start
the
car
If
it
doesn
t
start
check

the

igllltlon

sWitch
and

battery

If
the
car
starts
find
the

voltage
regulator
and

disconnect
the
wlute
red
Wire
this
is
the

lamp

wire
Ground
the

wire
If
the

lamp
hghts
the

voltage
regulator
is
defective
not

properly

grounded
try
tightening
the

mounting
screws

or
the
alternator
brushes
are
not

contactmg
the

commutator
If
the

lamp
does
not

light
when
the

wire
IS

grounded
the

lamp
is

probably
burned

out

replace
It

2
Alternator

warning
lamp
comes
on
and

stays
on

This

usually
mdicates
that
no

chargmg
is

takmg

place
Frrst
check
the
fan
belt

tension
and

adlust

if

necessary
Check
the

battery
condition
with

the

hydrometer
and
check
all
electrical
connec

tions
m
the

chargmg
system
Fmally
isolate
the

trouble
to
the
alternator
or

voltage
regulator

3
Alternator

warmng

lamp
flashes
erratically

This

usually
indicates
the

chargmg
system
is

workmg
intermittently
Check
the
fan
belt
ten

sion
and
all
electncal
connections
m
the

charg

ing
system
Check
alternator
brushes
and
cODlh

tlon
of
the
commutator

4

Baltery
reqUires
frequent
additiOns

of
water

or

lamps
require
frequent

replacement

The
alternator
IS

probably
overchargmg
the
bat

tery
The

voltage
regulator
is

probably
faulty

check
it

using
the

procedures
given
in

Chaper

Nme

5
ExceSSive

noISe

from
he
alternator

Check
for
loose
alternator

mountmg
The

TROUBLESHOOTING
13

trouble

may
also
be
worn

bearings
Remove
the

alternator
and

repair

ENGINE

These

procedures
assume
the
starter
cranks

the

engme
over

normally
If
not
refer
to
Starter

section
m
this

chapter

1

Engme
won
t
start

Could
be

caused

by
the

IgOltlon
or
fuel

problems

First
determine
If

high
voltage
to

spark
plug

occurs
To
do
thiS
dISconnect
one
of
the

spark

plug
wires
Hold
the

exposed
wrre
termlOal
y
to

Y2
lOch
from

ground
any
metal
in

engine
com

partment
With
an
msulated
screwdriver
Crank

the

engme
over
If

sparks
do
not

Jump
to

ground

or
the

sparks
are

very
weak
the
trouble

may
be

10
the

IgnitIOn
system
See

Ignition
System
Trou

bleshootmg
to
further
check
If

sparks
occur

properly
the
trouble

may
be
10
the
fuel

system

See
Fuel

System
Troubleshootmg

2

Engme
misses

steadily

Remove
one

spark
plug
wrre
at
a
tune
and

ground
the
wrre
If

engme
mISs
increases
that

cyhnder
was
work

109
properly
Reconnect
the

wire
and
check
the
others
When
a
wire

IS
dIs

connected
and

engme
miss
remams
the
same

that

cylinder
IS
not

finng

Check

spark
as
descnbed
10

Step
1
If
no

spark

occurs
for
one

cyhnder
only
check
dlStnbutor

cap
wrre
and

spark
plug
If

spark
occurs

prop

erly
check

compressIOn
and
mtake
maOlfold

vacuum
to
ISolate
the
trouble

3

Engme
misses

erratlcally
at
all

speeds

Interrmttent
trouble
can
be
difficult
to
find
It

could
be
ill
the

Ignition
system
exhaust

system

or
fuel

system
Follow

troubleshooting
proce

dures
for
these

systems
carefully
to
isolate
the

trouble

4

Engme
misses

at
Idle

only

Trouble
could
exist

anywhere
ill

IgOltlon
system

Follow

Ignition
TroubleshootlOg
procedure
care

fully
Trouble
could
also
eXist
10
the
carburetor

Idle
crrcult
Check
Idle
mIXture

adjustment
and

check
for
restnctions
m
the
idle
crrcUlt

5

Engme
misses
at

high
speed
only

Problems
could
be
ill
the
fuel
or

IgOltlon
systems
heck
accelerator

pump
operation
fuel

pump

dehvery
fuel
hnes
etc
as
descnbed
under
Fuel

System
Troubleshootillg
Also
check

spark
plugs

and
wrres

6
Low

performance
at
all

speeds
poor

acceleratIOn

Trouble

usually
ill

IgOltlon
or
fuel

system
Check

each
With
the

appropnate
troubleshooting
pro

cedure

7
ExceSSive

fuel
consumptIOn

Could
be
caused

by
a

Wide

variety
of

seemmgly

unrelated
factors
Check
for
clutch

shppage

brake

drag
defective
wheel

beanngs
or

poor

front
end

alignment
Check

IgOltlOn
system
and

fuel

system

8
011

pressure
lamp
does
not

light
when

IgmtlOn

switch

IS
on

Check
the
alternator

warning
lamp
If
it
ISn
t
on

either

go
to

Step
1

Chargmg
System
Trouble

shootlOg
If

only
the
oil

pressure
lamp
IS
off

open

the

englOe
compartment
hd
and
locate
the
oil

pressure
sender
on
the
block
near
the
oil
filter

Make
sure
the
wrre
is
connected
to
the
sender

and

makmg
good
contact
Pull
the
wrre
off
and

ground
it
If
the

lamp
hghts
replace
the
sender

If
the

lamp
does
not

light
replace
the

lamp

9
011

pressure
lamp
lights
or

flickers
when

engme
IS

runmng

Indicates
low

or

complete
loss
of
oil

pressure

Stop
the

englOe
unmedmtely
coast
to
a

stop
With

the
clutch

dISengaged
Tlus

may

simply
be

caused

by
a
low
oil
level
or
an

overheatmg
en

glOe
Check
the
oil
level
and
fan
belt
tensIOn

Check
for
a
shorted
oil

pressure
sender
with
an

ohmmeter
or
a

contlOulty
tester
Remove
and

clean
the
oil

dipstick
and
check
oil
level
and

condition

RepleOlsh
or

replace
the
oil

as
re

qurred
Listen
for
unusual
nOISes

mdlcatmg
dam

aged
beanngs
etc
Do
not
re
start
the

engine

until

you
know

why
the

hght
went
on
and

are

sure
that
the

problem
has
been
corrected

IGNITION
SYSTEM

This

procedure
assumes
the

battery
IS
ill

good

enough
condition
to
crank
the

engme
at
a

normal
rate