checking oil DATSUN 610 1969 User Guide
Page 138 of 171
CAMSHAFT
AND
CAMSHAFT
BEARINGS
Check
the
camshaft
bearing
and
journals
for
signs
of
wear
Plastigage
should
be
used
to
check
the
clearance
between
bear
ing
and
journal
which
should
be
0
025
0
075
mm
O
OOl
0
0030
in
The
cylinder
head
assembly
must
be
renewed
if
the
wear
limit
of
0
mm
0
0039
in
is
exceeded
Place
the
camshaft
in
V
blocks
and
apply
a
dial
gauge
to
the
centre
journal
to
check
the
amount
of
camshaft
bend
The
run
out
of
the
camshaft
must
not
exceed
0
03
mm
0
0012
in
It
should
be
noted
that
the
actual
run
out
will
be
half
the
value
indicated
on
the
dial
gauge
when
the
camshaft
is
turned
one
full
revolution
Check
the
camshaft
end
play
which
should
be
within
0
07
0
148
mm
0
0028
0
0058
in
Check
the
earn
contacting
surfaces
of
the
valve
rocker
and
the
earn
heels
of
the
camshaft
Slight
damage
can
be
corrected
using
a
fine
oil
stone
It
is
advisable
at
this
stage
to
check
the
clearance
of
the
rocker
shaft
and
rocker
bushes
which
should
be
0
016
0
052
mm
0
0006
0
0020
in
The
parts
must
be
renewed
if
the
wear
limit
of
0
07
mm
0
0028
in
is
exceeded
CYLINDER
BLOCK
Inspection
and
Overhaul
Check
the
block
for
signs
of
cracks
or
flaws
Measure
the
joint
face
for
distortion
using
a
straight
edge
and
feeler
gauge
as
described
for
the
L14
Ll6
and
L18
engines
The
surface
must
be
reground
if
the
maximum
limit
of
0
10
mm
0
0039
in
is
exceeded
Check
the
cylinder
bores
for
wear
out
of
round
and
excessive
taper
Use
a
bore
gauge
to
take
readings
at
the
top
middle
and
bottom
positions
of
the
bore
as
previously
described
The
standard
bore
diameters
are
85
000
mm
0
035
0
mm
3
347
0
0014
0
in
with
a
wear
limit
of
0
2
mm
0
0079
in
Out
of
round
and
taper
must
not
exceed
0
02
mm
0
0008
in
If
any
of
the
bores
are
worn
or
in
excess
of
the
specified
limi
t
then
all
bores
must
be
rebored
at
the
same
time
Pistons
are
available
in
five
oversizes
and
should
be
selected
in
accordance
with
the
amount
of
wear
of
the
cylinder
Refer
to
the
instructions
given
for
the
Ll4
L16
and
L18
engines
and
select
pistons
from
the
table
below
PISTON
SIZE
Standard
250
5
500
5
750
S
1000
S
1250
S
OUTER
DIAMETER
84
958
84
990
mm
3
345
3
346
in
85
220
85
240
mm
3
355
3
356
in
85
470
85
490
mm
3
365
3
366
in
85720
85
740
mm
3
375
3
376
in
85
970
85
990
mm
3
3846
3
3854
in
86
220
86
240
mm
3
394
3
395
in
Cylinder
liners
can
be
fitted
if
the
bores
areworn
beyond
the
maximum
limit
Undersize
liners
are
available
with
outer
diam
ters
of
89
091
89
126
mm
3
507
3
509
in
and
inner
diameters
of
83
5
84
5
mm
3
287
3
327
in
The
liners
are
an
interference
fit
in
the
block
and
must
be
rebored
after
fitting
PISTONS
Checking
Oteck
the
pistons
for
signs
of
seizure
and
wear
measure
the
side
clearance
of
the
rings
in
the
ring
grooves
and
check
the
piston
ring
gaps
as
previously
described
for
the
L14
Ll6
and
Ll8
engines
Compare
the
figures
obtained
with
those
given
in
the
tables
opposite
Side
clearance
in
grooves
Top
ring
Second
ring
Oil
ring
Standard
0
04
0
08
mm
0
0016
0031
in
0
02
0
06
mm
0
0008
0
0024
in
0
02
0
06
mm
0
0008
0
0024
in
Limit
LO
mm
0
0039
in
LO
mm
0
0039
in
LO
mm
0
0039
in
Piston
ring
gap
Top
ring
Second
ring
Oil
ring
Top
ring
Second
ring
Oil
ring
Standard
0
35
0
55
mm
0
01
38
D
021
7
in
0
3
5
mm
0
0138
0
0197
in
0
35
55
mm
O
oJ38
0217
in
Limit
LO
mm
0
0394
in
LO
mm
0
0394
in
LO
mm
0
0394
in
Top
ring
Second
ring
Oil
ring
Measure
the
outer
diameter
of
the
gudgeon
pin
in
relation
to
the
hole
diameter
in
the
piston
Compare
the
figures
obtained
with
those
given
in
Technical
Data
and
replace
the
piston
and
pin
if
the
wear
limit
is
exceeded
CONNECTING
RODS
Checking
Check
the
connecting
rods
for
bends
or
twists
using
a
suit
able
connecting
rod
aligner
The
maximum
deviation
should
not
exceed
0
05
mm
0
0020
in
per
100
mm
3
94
in
of
rod
Straighten
or
replace
any
rod
which
does
not
comply
with
the
specified
limit
When
renewing
a
rod
make
sure
that
the
weight
difference
between
new
and
old
rods
in
within
6
gr
212
oz
Install
the
connecting
rods
with
bearings
to
the
correspond
ing
crank
pins
and
check
that
the
end
play
of
the
big
ends
is
between
0
10
0
246
mm
0
0043
0
0097
in
Replace
the
appropriate
rod
if
the
maximum
limit
of
0
3
mm
0
0118
in
is
exceeded
CRANKSHAFT
Inspection
and
Overhaul
Clean
the
crankshaft
thoroughly
and
check
the
journals
and
crank
pins
for
taper
and
out
of
round
Use
a
micrometer
to
measure
the
journals
and
crankpins
at
the
positions
shown
in
Fig
A
7
It
will
be
necessary
to
regrind
the
crankshaft
if
the
specified
limit
of
0
03
mm
0
0012
in
is
exceeded
and
then
fit
the
appropriate
undersize
bearings
Place
the
crankshaft
in
V
blocks
as
described
for
the
L14
L16
and
LIB
engines
and
apply
a
dial
gauge
to
the
centre
journal
to
check
that
the
bend
limit
of
0
05
mm
0
0020
in
is
not
exceeded
The
actual
bend
value
will
be
half
the
reading
obtained
on
the
gauge
Install
the
crankshaft
in
the
cylinder
block
and
check
the
crankshaft
end
float
which
should
be
0
060
0
192
mm
0
0024
0
0076
in
Replace
the
centre
shims
if
the
specified
figure
is
exceeded
Make
sure
that
the
main
drive
shaft
pilot
bearing
at
the
rear
of
the
crankshaft
is
not
worn
or
damaged
in
any
way
Remove
the
bearing
if
necessary
using
the
special
tool
ST49700000
as
shown
in
Fig
A
8
Clean
the
bearing
hole
oil
the
outer
side
of
the
new
bearing
and
use
a
drift
as
shown
in
Fig
A
9
to
drive
it
into
the
hole
Insert
2
grams
0
07
oz
of
multi
purpose
grease
into
the
hole
as
illustrated
Main
bearing
clearance
Check
the
main
bearing
clearances
as
described
for
the
Ll4
Ll6
and
Ll8
engines
The
Plastigage
should
be
placed
so
57