1968 DATSUN 510 headlight bulb

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

138

INDEX

H
OIl

pump

Descnptlon
36

Handbrake

Exploded
view

29

Adjustment
202

Inspection
and

repaIr
28

Cable
removal

front
sedan
and

wagon
197

Installation

58

Cable
removal
rear

pick
up
201

Removal

28
40

Cable
removal
rear
sedan

and

wagon
197

Cross
rod

removal

wagon
201

Exploded
views

198
200

p

Inspection
and

repair
201

Installation

201

Penodlc

mamtenance

Headlights

MaIntenance

mtervals
chart

7

Bulb

replacement
210

Penodlc

checks
6

Descnptlon
210

Recommended
lubncants
8

Exploded
view

219

Routine

checks
6

HeatIng
system

Piston

nngs

Descnptlon
210

Exploded
view

pick
up
213
Inspection
50

Exploded
VIews
sedan
and

wagon
214
215
Removal

45

Hood

lock
control
RIng
gap
50

Exploded
View

pick
up
225
Pistons

Descnptlon
34

Exploded
VIew
sedan
and

wagon
226

Inspection
50

Reassembly
54

Igmtlon
coil

111

R

Igmtlon

system

Tlmmg
23
Radiator

Troubleshooting
13

Exploded
view
90

Instrument

meters
and

panels
Removal
and

replacement
90

Descnptlon
210
Rear
axle

pick
up

Exploded
View

pick
up
213
Axle

case

166

Exploded
view
sedan
and

wagon
Inspection
and

mstalIatlon
164

1970
1972

212

Removal

164

Exploded
view

sedan
and

wagon
Sectional

view

163

through
1969

211
Rear

axle

wagon

Intake
manifold

Disassembly
158

Descnptlon
36

Exploded
view

158

Removal

42

Inspection
and

reassembly
160

InstallatIOn

160

Removal

158

M
Rear
axle
and

suspenSion
sedan

Exploded
view

152
153

Mam

beanngs
52

Inspection
and

repaIr
154

MaIntenance

penodlc
6
8

InstalIatlon
154

Master

cylInder
Removal

151

Exploded
vIew

smgle
188
Rear

spnngs
pick
up
166

Exploded
view
tandem

189
Rear

spnngs
wagon
161

Inspection
and

repllIr
188
Rear
axle
shaft
sedan

155
156

Reassembly
and
InstalIatlon

190
Rear

suspension
arm
sedan

155

Removal
and

disassembly
188
Rear

suspenSion
pick
up

Modelldentdicatlon

1

Exploded
view

166

Inspection
and

repllIr
167

InstalIatlon

167

0
Rear

spnngs
166

Removal

165

011

filler

30

Spnngs
166

d

43

Torques
67