Test Conclusion; Battery; Ignition Timing; Checking The Specific Gravity Of Battery-Electrolyte - Datsun 1200 1971 Workshop Repair Manual

aiDtenaDce
TUDe up
ting tightly
m
spark plug
hole of
a
cylin
der
The tester is used
to
determme whether
cylinder
can
hold
compression
or
whether there
IS
excessive
leakage past
rings etc
Test
compressIOn
wIth
engme warm
all
spark
plugs
removed and throttle and choke valve
opened
No
cyhnder
compressIOn
should be
less
than
80 of
highest cyhnder
s
Excessive
variatIOn
between
cyhnders accompamed by
low
speed
missing
of the
cyllndel usually
10
dlcates
a
valve not
properly
seating
or a
blOken
pIston
ring
Low
preSsures
even
though
umform
may
indIcate
worn rings
ThIs
may
be
accompamed by
excessive
011
consumptIOn
Test Conclusion
If
one or more
cyhnders read low
Inject
about
one
tablespoon
of
engine
011
on
top
of the
plstons In
low
readmg cyhnders through
spark plug
hole
Repeat
compressIOn
check
on
these
cy
IInders
If
compressIOn Improves
conSiderably
piston
rings
are
defectIve
If compressIOn does
not
Improve
valves
are
stIcking
or seatIng
Improperly
If
two adjacent cyhnders
mdlcate low
com
pressIOn
and
mjectmg
011
on
pistons
does
not
Increase
compreSSIOn
the
cause
may
be
a
cylInder
head
gasket
leak between the
cyhn
ders
Engine
011 and coolant
In
cylInder
could
result from this
problem
CompressIOn
pressure
178
to
206
pSI at
350
rpm
BATIERY
Check
electrolyte
level
10
each
battery
cell
Unscrew
each filler
cap
and
Inspect
flUId
level If flUId level
IS
low add
dIstilled
water
to bring
level
up to
approximately
03937
to
07874
In
above
plates
Do
not overfill
Mea
ure P
illL
gravlty
of
pattery
el
c
trolyte
8
Clean
top
of battery and terminals With
a
solutIOn of
baking
soda and
water
Rinse off
and
dry
WIth
compressed
atr
The top of bat
tery
must
be clean
to
prevent
current leakage
between terminals and from
poSItive
termlndl
to
hold down
clamp
In
additIOn
to current
leakage prolonged
ac
cumulatIon of aCId and dirt
on
the
top
of bat
tery
may
cause
bhstenng
of the material
covering
connector
straps and
corrOSIOn
of
straps
After
tightening
terminals
coat
them
With
petrolatum vasehnel
to
protect
them
from
corrosIOn
IGNITION TIMING
Check
spark plugs
and dIstributor breaker
pOints
for conditIon
I
I
Thoroughly
wipe
off dIrt and dust from
tlmmg
j
marks
on
crank pulley and front
cover
Warm
up engine
suffiClently
PermIssIble Full
charge
value
value
at
68OF
Fngld
chmates Over
1 22
128
TropIcal
chmates Over
I
18
123
Other clunates Over 1 20 126
j
J
I
ET002
Flg
S
Gheckmg
the
speCific gravity
of
baltery
elec
trolyte
f