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Fig.
2-94. Expa
nsion tank
COOLlNG SYSTEM LEAKAGE CHECK
VOLVO
103386
The
coaling
sys tem is checked for
leakage
as fo,ltlows:
Remove the
expansion tank
cap and make sure that
the fiH
in
g
hole
and sealing surface are clean. Connect
a cool
in
g
sY'~tem
press ure
te~~er
to the
fi
lli
ng
hole
according
to the ,instructions
of
the manufadurer.
Make
s
u'r,
e
that
t
he
rubbe'r
bush (if one
is
fitted) faces
corredly.
Carefully pump up
t
he
pressure
to
.7
kg/cm
2
(10
Ib/sq.in.). Observe the pressure tester gauge.
The pressu're
mu'~
not
drop
nOlf:iceably
during 30
seconds. Ifit
doe'
s , examine and remedy
the leakage.
Connect
the ppessure tester
gauge
to
i
he
radiator,
wh
e
n ohecking the
cap-v'alve
andsealing
s urface.
THERMOSTAT
After
being
removed,
the
thermo~at
can
be tested in
avessel
,
c onttaining
heated water.
The
thermostat
shouldopen and
dase
according
to the values
given
in
"Specifications". A
faulty
t
hermostai
should
be
discmded.
Use
a new
gasket
when
fitting
the
ther-
mosta,
t .
REPLACING THE RADIATOR
l
.
Remove the radiator
cap and
drain the system
of coolant by disconneoting
the
lower
radiator
hose
.
2.
Remov,
e ,the
expans
ion
tank with hose and
empty
out the
Goolant.
Remove the upper radiator hose.
3.
Remove the bolts for the radiator and
fan casing.
L 'ift off the
radia,tor.
4. P,lace the radiator
,
i n position
and
fighten the bolts
for the radiator and fan
casing.
5.
Fit the radiator hoses
as
weil
as
the
expans
ion
tank with hose.
Fig. 2-95.
Fan belt tension
F=
1-9
kg
(1
5-~
O
Ib,)
A=
10
mm
(approx,
3/8"
)
6.
Fi.JI
with coo lant, see under
"Fillingempty
system
with
coolant".
Start
the eng,ine
and check for
leakage.
REPLACING THE WATER PUMP
Remove
the
radia,
t or
according to
t he
instructions
given
under "Replac
ing
the radiator" and
screw off
the
water
p ump. Clean
the
sea
ling
'
s urfacesa
nd refit
tf':e pump
with new gasket.
Make
s
ure when
fitting
that the
sealing rings on the
upper
side of the pump
locate
oOI
f're.ct
ly.
A lso
press
the
pump upwa!l1ds
against
the
cylinder
head
e~tension
under
the bo
l,
t ing,
so
that
the sealing between the pump and
cy
linde1r
head will
be
satisf.actory.
Ma,ke
sure
that the
seaHng rings
at
the water pipes a,re not damaged
and
press
in
,
t he
pipes thoroughly
when ottach
ing
.
TENSIONING THE PULLEY BELT
The pulltey belt is tensioning
so
that itt
can
be deflected
10
mm (3/8") witth a fOl1ce
of 7-9
1/2
(15-
20 'Ih.)
applied to the belt between the water pump pu,Hey and
altemator pulley.
Fig.
2-95.
The amount of force
app,
l
,i,
e d
will depend on the
location
of
the boli in
.the
oblang
sloi in
the ten-
s
ioner.
With the bolt
a'
t the
end
of the
slot
(long
belt), the force
applied should
be
7
kg
(1
5
Ib.)
and
with the bolt at the beginning of
,
t he siat
(short
belt),
a f.orce of 9 kg {20
Ib.)
shoul.d
be applie,d. If the
bolt
i's
loca.ted
,
a nywhere beiwe,en these 'ext,remes, the
force appl,ied should be proportionally within the two
limits
given.
N.B. The
al,
t emator must not be obliquely
loaded.
If an
i'
r on
lever is
used for adjusting, it should be
placed between the
eng'ine
and the
front
alternator
end.
Note
tha,
t if the
lower
alternattor
bo,
1 if
i'
s not slackened
2:
43
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