Datsun 1000 Workshop Manual page 21

i r
l
W
l
X
I
I
Il
i
r
0
iiI
11
1
h
@
If
j
0 t
ff
I
h
fi
0
l
J
I
I
r
q i
t
Il I
if
1
eo
EP
II
I
I
i
1
l
x
s
CA UTlON Be
sure
that all abrasives
are
removed
from
the
engine after honing It is recommended
that
a
solution
of
soap
and
water
be used with
a
brush and the
affected
components
thorough
y
dried
The cylinder
bores
can
be
cf
msidered
clean
when
they
can
be
wiped
clean with
a
white cloth and the cloth remains
clean
Smear the
bores
with
engine
oil
after cleaning to
prevent
rusting
CHECKING
PISTON SKIRT
CLEARANCE
NOTE
Cylinders that haye been rebored and
honed
to
take
the
appropriate
oversize
pistons
should have each
piston
measured and then tried in its
respective
bore with
a
feeler
strip
and
spring
scale
to ensure
that correct
skirt clearance
is obtained
1 Measure the outside diameter of
the
piston skirt
at
right
angles to the
gudgeon pin
axis and IS 6 mll 0 732 in
down from the
gudgeon pin centres
The
piston temperature
when
measuring
should be
approximately
200C 6S0F
2 Select
a
feeler
strip
0 04
mm
0 0016
in in
I
S PACER
SHIMSfU
Engine
IS
thickness and
approximately
12
mm
0 50 in in width The
strip should be long enough
to
extend the full
length
of the
piston
3 Insert the feeler
strip
into the
cylinder
bore Invert
the
piston
and
position
it into
the
cylinder
bore
so
that the
feeler strip
is
located lengthwise between the cylinder
wall
and
the
full length of the piston
at
90 degrees
to
the
gudgeon pin
axis
4
Attach
a
spring scale
to
the
top
end
of the
feeler
strip
and withdraw the feeler
strip
in
a
plane parallel
to the
centre
line of the cylinder bore noting the
reading
on
the
spring
scale
5 The
correct spring
scale
reading
should be within
0
2 and 15
kg
0 44 and 3 3 0
Ibs If
the
reading
is not
within these specifications then
check
the original
measurements
of the
piston
and bore and also check the
piston
skirt
for high spots If
necessary
select
measure
and
check another
piston
to
obtain the
required
fit
6 Follow the
same
procedure
to
fit the remaining
pistons
as
required
fi
o
Q
o
1ll
o 7Q
H
Underside of
Engine
with
Sump
Removed
Showing
Arrow
on
Front and Intermediate Main
Bearings
and Shims behind
Crankshaft Sprocket 1000 Series shown
1200 has five Main
Bearings
TO REMOVE
AND INSTAL
lO CRANKSHAFT
NU MAIN HEAIIINGS
1
With
the
engine
removed from
the
vehicle
remove
the
rocker
mechanism
manifold and
cylinder
head
as
previously
described
2 Remove the
sump
timing
cover
timing
chain and
sprockets
as
previously described
3
Remove
the
oil pick
up
tube and
strainer
4 Release the lock
plates
take
out
the six
securing
bolts and
remove
the
flywheel marking
the
flywheel
position
in
relation
to
the crankshaft
flange
5
With the
engine
inverted and
resting
on a
clean
bench
on
the
cylinder
block top
gasket
surface release the
big
end bearing
cap
nuts
and
remove
the caps and lower
half of the
bearing
shells
Keep each cap and shell together
for
correct
installation and
note
the
number
on
the
side of
each
cap
6 Push the
connecting
rod and
piston
assemblies
21