Thermostat Removal; Thermostat Inspection; Installation - Datsun 1200 1971 Workshop Repair Manual

GooliDI Sptem
mechamsm
IS
adopted
to
prevent
the
water
leakage
and
nOIse
completely
Note
The
water
pump
must
not
be
disassembled since
the
bearings
are
shrmkage
fitted
to
their bores If
any
part
of
water pump
is found defective
replace
pump
assembly
Removal
Dram
coolmg water
completely
Take the fan belt ofT the
pulley
Remove fan and
pulley
Remove the water pump
Installation
InstallatIOn
IS
the
reverse
of removal
THERMOSTAT
A
pellet
type
thermostat
IS
used
m
the
water
outlet passage to
control the flow of coolant
provldmg
fast
engme warm up
and
regulatmg
coolant temperature
A
wax
pellet
m
the ther
mo
tat expands
when heated and
contracts
when cooled The
pellet
IS
connected
through
a
piston
to
a
valve and when the pellet
IS
heated
pressure
IS
exerted
agamst
a
rubber
dIaphragm
and the valve
opens
As the
pellet
IS
cooled the contractIOn
allows the sprmg
to
close the valve
Removal
Dram
coohng water
Remove radiator hose
Remove water
outlet elbow
Then take
out
the thermostat
Inspection
To
test
the thermostat for proper
operatmg
temperature submerg
he
umt
m a
contamer
of
water
Heat the water
and observe the
tem
perature
Measure temperature
when the thermostat
valve
Just
starts rlsmg
If thermostat does
not
operate
at the above
specIfied
temperatures
It must
be
replaced
Installation
When
mstalhng
the thermostat
apply
adheSIve Three Bond
to
both SIdes of the
packmg
for preventIOn of water
leakage
In
stall the thermostat
m reverse
sequence of
removal
USA
Canadd
Olher
coun t
nes
Valve opemng
temperature
177 to r8710
16710
F
183 193 173
Valve lIft
O
oF
031 203
031 212
031 194
WI
fL
g
0
I
l
1
L J I
I
I
I
I
a
J i
o
wa
r
outlet
EI
Thermostat
Fig
109 Thermostat removal
FIQ
110 Thermostat inspection
81