Datsun 1000 Workshop Manual page 30

3 C ooling
System
4 W TER PU IP
TO REMOVE
l
Remove the radiator cap and drain the
cooling
system
via
the tap
on
the lower radiator tank and
at
the
plug
on
the left
hand side of the
cylinder block
2 Disconnect and
remove
the
upper
and lower
radiator hoses
3 On
vehicles
fitted
with automatic transmission
and
where
applicable
disconnect the
torque
converter coolIng
pipes at
the
lower
radiator tank
plug
the
pipes and
unions
to
prevent entry of dirt
4 Unscrew
the fixing bolts and
remove
the radiator
grille
5 Remove the four radiator
retaining
bolts and lift
out the radiator
6
Slacken the fan belt
adjusting
bracket bolt and the
two
bolts
attaching the alternator to
the mounting
bracket
on
the
cylinder
block
7 Push the alternator
towards the
cylinder
block and
remove
the fan belt
8 Bend
back the lock tabs
where
applicable
and
remove
the four bolts
securing
the fan and fan
pulley
to the
water
pump
and withdraw the fan
and
pulley
9 Unscrew the
water
pump to
timing
case
securing
bolts
and detach the water pump and gasket Discard the
gasket
Installation is
a
reversal of the removal
procedure
with
attention
given
to the
following
Use
a new
gasket
between the water pump and
timing
cover
when installing the
pump
Apply
a
smear
of
jointing compound
to
both
sides of
the
new
gasket
Adjust
the
fan belt
as
described
under FAN BELT
TO ADJUST
Ensure
that the
cooling system drain
points
are
closed
and that the system
is
replenished
with clean
water
TO DISMANTLE
I Drain
the
cooling
system
and
remove
the
water
pump as
previously described
2
Using
a
suitable
puller
withdraw the pump
pulley
flange from
the
fOlWard
end of the
shaft and
bearing
assembly
3 Remove the
bearing retaining
bearing and shaft
assembly together
impeller out
of the pump
body
4
Press
the
impeller off the end of the shaft
and
bearing assembly
and withdraw the seal
assembly
5 Remove the seal
rubbing
block and shaft seal from
the
recess
in
the
impeller
clip
and
press
the
with
the seal and
TO
CHECK
NOTE
It is
generally
unnecessary
to dismantle
the
water
pump
assembly
unless it is
leaking water
past
the seal
or
if
the ball
bearing
has becume noisv
Once dismantled it is
a
good policy
to
instal
a
complete
water
pump
kit
which
consists
of
seal
as
emb
y
bearing
and
shaft
assemb
v
and
impeller
When the pump is removed
from
the vehicle make
a
visual check
of
the
pump
body If
it is
apparent
that the
pump
body is corroded
or
cracked then it
can
be assumed
that the pump
bodv
is unserviceable in which
case
the
complete water
pump
assembly
should be discarded
and
a
new
unit fitted
1
Check the pump
body for
corrosion
cracks
or
damage
2
Check the bearing for looseness
in the
pump
body
bore and for
roughness
when rotated
3
Check that the
water
by
pass
hole
in the
pump
body
and
timing
cover
are
free ofobstruction
NOTE When
cleaning
the pump
components
do
not
immerse the
shaft
and
bearing assembly
in
cleaning
soh
ent
if rhe
assembly
is
to be
used
again
Q 5mm
0 0 20In
74
mm
2 9 13In
Assembly Dimensions f
Vater Pump
30