timing belt DATSUN PICK-UP 1977 Service Manual
Page 37 of 537
Engine
Tune
up
SERVICE
DATA
AND
SPECIFICATIONS
Ignition
timing
and
idling
Manual
transmission
Automatic
transmission
in
D
position
Valve
clearance
Cold
Intake
Exhaust
Intake
Exhaust
Hot
Belt
tension
Fan
Air
pump
Air
coo
compressor
Pressure
Compression
pressure
at
350
rpm
Standard
Minimum
Radiator
cap
relief
pressure
Cooling
system
Leakage
testing
pressure
Battery
specific
gravity
at
200C
680F
Distribu
tor
Point
gap
Air
gap
Dwell
angle
Condenser
capacity
Condenser
insulation
resistance
Spark
plug
Gap
degree
rpm
120
B
T
D
C
j750
Non
Calif
models
100
B
T
D
C
j750
California
models
degree
rpm
l20B
T
D
C
j650
mm
in
mm
in
mm
in
mm
in
0
20
0
008
0
25
0
010
0
25
0
010
0
30
0
012
mm
in
mm
in
mm
in
kg
lb
8
to
12
0
315
to
0
472
8to
12
0
315
to
0
472
8
to
12
0
315
to
0
472
10
22
is
applied
kg
cm2
psi
kg
em2
psi
kg
em
2
psi
12
0
171
9
0
128
0
9
13
kg
cm2
Psi
1
6
23
1
26
mm
in
mm
in
degree
IF
Mil
0
45
to
0
55
0
018
to
0
022
0
2
to
0
4
0
008
to
0
016
490
to
550
0
20
to
0
24
5
mm
in
0
8
to
0
9
0
031
to
0
035
Breaker
points
type
1
0
to
1
1
0
039
to
0
043
Transistor
ignition
type
Checking
CO
percent
at
idling
speed
No
air
Manual
transmission
model
rpm
Automatic
transmission
model
rpm
Adjustment
of
operating
pressure
of
B
C
D
D
B
C
D
D
set
pressure
Manual
transmission
Automatic
transmission
2
1
1
750
2
1
1
650
mmHg
in
Hg
mmHg
in
Hg
510
to
550
20
1
to
21
7
490
to
530
19
3
to
20
9
ET
25
Page 39 of 537
Engine
Tune
up
TROUBLE
DIAGNOSES
AND
CORRECTIONS
Condition
Probable
cause
CANNOT
CRANK
ENGINE
OR
SLOW
CRANKING
Improper
grade
oil
Discharged
battery
Faulty
battery
Loose
fan
belt
Malfunction
in
charge
system
Wiring
connection
loose
in
starting
circuit
Faulty
ignition
switch
Faulty
starler
motor
Trouble
shooting
procedure
on
starting
circuit
Switch
on
the
starting
motor
with
light
ON
When
light
goes
off
or
dims
considerably
a
Check
battery
b
Check
connection
and
cable
c
Check
starter
motor
When
light
stays
bright
Corrective
action
Replace
with
proper
grade
oiL
Charge
battery
Replace
Adjust
Inspect
Correct
Repair
or
replace
Repair
or
replace
a
Check
wiring
connection
between
battery
and
starter
motor
b
Check
ignition
switch
c
Check
starter
motor
ENGINE
WILL
CRANK
NORMALLY
BUT
WILL
NOT
START
In
this
case
the
following
trouble
causes
may
exist
but
in
many
cases
ignition
system
or
fuel
system
is
in
trouble
Ignition
system
in
trouble
Fuel
system
in
troubk
Valve
mechanism
does
not
work
properly
Low
compussion
Trouble
shooting
procedure
Check
spark
plug
firstly
by
following
procedure
Disconnect
high
tension
cable
from
one
spark
plug
and
hold
it
about
10
mm
0
39
in
from
the
engine
metal
part
and
crank
the
engine
Good
spark
occurs
Check
spark
plug
b
Check
ignition
timing
c
Check
fuel
system
d
Check
cylinder
compression
Check
the
current
f10
in
primary
circuit
Very
high
current
Inspect
primary
circuit
for
short
Check
breaker
poiIit
operation
except
tran
sistor
ignition
system
No
spark
occurs
ET
27
Page 42 of 537
Condition
ENGINE
POWER
NOT
UP
TO
NORMAL
Low
compression
Ignition
system
out
of
order
Fuel
system
out
of
order
Air
intake
system
out
of
order
Emission
control
Overheating
O
cooIing
Others
Engine
Tune
up
Probable
cause
Incorrect
iSnition
timing
Damaged
spark
plugs
Worn
distributor
points
Malfunction
of
choke
system
Clogged
fuel
pipe
or
floating
valve
Dirty
or
clogged
fuel
strainer
Fuel
pump
will
not
work
properly
C10ssed
carburetor
jets
Malfunction
of
altitude
compensator
CIOJBed
air
cleaner
Ail
inhaling
from
manifold
gasket
or
carburetor
gasket
Malfunction
of
E
G
R
valve
Stick
E
F
E
valve
shaft
Insufficient
coolant
Loose
fan
belt
Worn
or
oiled
fan
belt
Inoperative
thermostat
Worn
water
pump
Clogged
or
leaky
radiator
Worn
radiator
filler
cap
Ail
in
cooling
system
Improper
engine
oil
grade
Incorrect
ignition
timing
Clossed
carburetor
lean
mixture
Disconnected
altitude
compensator
hOlle
Inoperative
thermostat
Improper
octane
fuel
L
j
tire
pressure
Dragging
brake
Clutch
slipping
ET
30
Corrective
action
Previously
mentioned
Adjust
Clean
adjust
or
replace
plull
Dress
or
replace
points
Also
check
condenser
Adj
lst
Clean
Replace
Repair
or
replace
Disassemble
and
clean
Check
and
replace
Replace
element
Replace
gasket
Check
and
replace
Repair
Replenish
Adjust
fan
belt
Replace
Replace
Replace
Flush
repair
or
replace
Replace
Retighten
each
part
of
cooling
system
Replace
with
proper
grade
oil
Adjust
Overhaul
carburetor
Connect
Replace
Replace
with
specified
octane
fuel
Inflate
to
specified
pressure
Adjust
Adjust
Except
transistor
ignition
system
Page 96 of 537
Condition
Loss
of
water
Poor
circulation
Corrosion
Overheating
Overcooling
Cooling
System
TROUBLE
DIAGNOSES
AND
CORRECTIONS
Probable
cause
Damaged
radiator
seams
Leaks
at
heater
connections
or
plugs
Leak
at
water
temperature
gauge
Loose
joints
Damaged
cylinder
head
gasket
Cracked
cylinder
block
Cracked
cylinder
head
Loose
cylinder
head
bolts
Restriction
in
system
Insufficient
coolant
Inoperative
water
pump
Loose
fan
belt
Inoperative
thermostat
Excessive
impurity
in
water
Infrequent
flushing
and
draining
of
system
Inoperative
thermostat
Radiator
fin
choked
with
mud
chaff
etc
Incorrect
ignition
and
valve
timing
Dirty
oil
and
sludge
in
engine
Inoperative
water
pump
Loose
fan
belt
Restricted
radiator
Inaccurate
temperature
gauge
Impurity
in
water
Inoperative
thermostat
Inaccurate
temperature
gauge
CO
7
Corrective
action
Repair
Repair
Tigh
ten
Tighten
Replace
Check
engine
oil
for
contamination
and
refill
as
necessary
Replace
Check
engine
oil
in
crankcase
for
mixing
with
water
by
pulling
oil
level
gauge
Replace
Tighten
Check
hoses
for
crimps
and
clear
the
system
of
rust
and
sludge
by
flushing
radiator
Replenish
Replace
Adjust
Replace
Use
soft
clean
water
Rain
water
is
satis
factory
Cooling
system
should
be
drained
and
flushed
periodically
Permanent
anti
freeze
Ethylene
glycol
base
can
be
used
through
out
the
seasons
of
the
year
and
change
periodically
at
intervals
recommended
Replace
Clean
out
air
passage
thoroughly
by
using
air
pressure
from
engine
side
of
radiator
Adjust
Refill
Replace
Adjust
Flush
radiator
Replace
Use
soft
clean
water
Replace
Replace