Page 377 of 513

ENGINE
MECHANICAL
Piston
diameter
standard
mm
in
Oversize
50
mm
in
Oversize
100
mm
in
Oversize
150
mm
in
Ellipse
difference
mm
in
Ring
groove
width
Top
2nd
Oil
mm
in
Piston
to
bore
clearance
mm
in
g
Piston
pin
Pin
diameter
mm
in
Pin
length
mm
in
Piston
pin
to
piston
clearance
mm
in
Interference
fit
of
piston
pin
to
connecting
rod
bushing
mm
in
h
Piston
ring
Ring
height
Top
2nd
Oil
mm
in
Side
clearance
mm
in
Top
2nd
Oil
Ring
gap
mm
in
Top
2nd
Oil
EM
37
72
967
to
73
017
2
8727
to
2
8747
73
467
to
73
517
2
8924
to
2
8944
73
967
to
74
017
2
9121
to
2
9140
74
467
to
74
517
2
9318
to
2
9337
0
01
to
0
03
0
0004
to
0
0012
2
0
0
0787
2
0
0
0787
4
0
0
1575
0
023
to
0
043
0
0009
to
0
0017
17
447
to
17
452
0
6869
to
0
6871
0
6869
to
0
6871
65
23
to
65
48
2
5681
to
2
5779
0
006
to
0
008
0
0002
to
0
0003
at
200e
680
F
0
017
to
0
034
0
0007
to
0
0013
2
0
0
0787
2
0
0
0787
4
0
0
1575
0
04
to
0
07
0
0016
to
0
0027
0
04
to
0
07
0
0016
to
0
0027
0
04
to
0
08
0
0016
to
0
0031
0
2
to
0
35
0
0079
to
0
0138
0
2
to
0
35
0
0079
to
0
0138
0
3
to
0
90
0
0118
to
0
0354
Page 378 of 513

ENGINE
TROUBLE
DIAGNOSES
AND
CORRECTIONS
Troubles
I
Noisy
engine
Knocking
of
crank
shaft
and
bearing
Piston
and
connecting
rod
knocking
Camshaft
knocking
Timirrg
chain
noise
Camshaft
and
valve
mechanism
knock
ing
Possible
causes
Loose
main
bearing
Seized
bearing
Bent
crankshaft
Excessive
crankshaft
end
play
Loose
bearing
Seized
bearing
Loose
piston
pin
Loose
piston
in
cylinder
Broken
piston
ring
Improper
connecting
rod
alignment
Loose
bearing
Excessive
axial
play
Rough
gear
teeth
Broken
eam
gear
Improper
chain
tension
Worn
and
or
damaged
chain
Worn
sprocket
Worn
and
or
broken
tension
adjusting
mecha
nism
Excessive
camsh
ifCano
bearing
cIearance
Improper
valve
clearance
Worn
adjusting
screw
Worn
rocker
face
Loose
valve
stem
in
guide
Weakened
valve
spring
Seized
valve
EM
38
Remedies
Replace
Replace
Repair
or
replace
Peplace
center
thrust
bearing
Replace
Replace
Replace
pin
or
bushing
Recondition
cylinder
Replace
Realign
Replace
Replace
bearing
thrust
plate
Repair
Replace
Adjust
Replace
Replace
Replace
Replace
Adjust
Replace
Replace
Replace
guide
Replace
Repair
or
replace
Page 379 of 513

Water
pump
knocking
II
Other
mechanical
trouble
Sticked
valve
Seized
valve
seat
Excessively
worn
cylinder
and
piston
ENGINE
MECHANICAL
Improper
shaft
end
play
Broken
impeller
Improper
valve
clearance
Insufficient
clearance
between
valve
stem
and
guide
Weakened
or
broken
valve
spring
Biting
or
damage
ofvalve
stem
Poor
fuel
quality
Improper
valve
clearance
Weakened
valve
spring
Thin
valve
head
edge
Narrow
valve
seat
Overheat
Over
speeding
Sticked
valve
guide
Shortage
of
engine
oil
Dirty
engine
oil
Poor
oil
quality
Overheat
Wrong
assembly
of
piston
with
connecting
rod
Improper
piston
ring
clearance
Dirty
air
cleaner
Too
rich
mixture
Engine
over
run
Slicked
cho
e
valve
Over
choking
EM
39
Replace
Replace
Adjust
Clean
stem
or
ream
the
guide
Replace
Replace
or
clean
Use
good
fuel
Adjust
Replace
Replace
valve
Reface
Repair
or
replace
Drive
under
proper
speed
Repair
Add
or
replace
oil
Check
oil
level
on
daily
basis
Clean
crankcase
replace
oil
and
re
place
oil
fIlter
element
use
right
oil
Repair
or
replace
Repair
or
replace
Adjust
Clean
periodically
Adjust
Drive
correctly
Clean
and
adjust
Start
in
correct
way
Page 380 of 513
r
Defective
connecting
rod
Defective
crankshaft
bearing
ENGINE
Shortage
of
engine
oil
Low
oil
pressure
Poor
engine
oil
quslity
Rough
surface
of
crankshaft
Clogged
oil
passage
Wear
or
eccentricity
of
bearing
Wrong
assembly
of
bearing
Loose
bearing
Incorrect
connecting
rod
alignment
Shortage
of
engine
oil
Low
oil
pressure
Poor
engine
oil
quality
Wear
or
out
of
round
of
crankshaft
journal
Clogged
oil
passage
in
crankshaft
Wear
or
eccentricity
of
bearing
Wrong
assembly
of
bearing
Not
concentric
crankshaft
or
bearing
EM
40
Add
or
replace
oil
Check
oil
level
on
daily
basis
Correct
Use
right
oil
Grind
and
replace
bearing
Clean
Replace
Repair
Replace
Repair
or
replace
Add
or
replace
Check
oil
level
on
daily
basis
Adjust
Use
right
oil
Repair
Clean
Replace
Repair
Replace
Page 381 of 513
y
1
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R
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r
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r
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0
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r
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IJ
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II
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DATSUN
1200
MODEL
8110
SERIES
I
NISSAN
I
NISSAN
MOTOR
CO
LTD
TOKYO
JAPAN
SECTION
EL
ENGINE
LUBRICATION
SYSTEM
LUBRICATION
SYSTEM
TROUBLE
DIAGNOSES
AND
CORRECTIONS
Ell
El
4
Page 382 of 513
ENGINE
lUBRICATION
SYSTEM
LUBRICATION
SYSTEM
CONTENTS
DESCRIPTION
LUBRICATION
CIRCUIT
OIL
PUMP
Description
Removal
EL
1
EL
2
EL
2
EL
2
EL
2
Disassembly
I
nspection
and
repair
OIL
PRESSURE
REGULATOR
VALVE
OIL
FILTER
EL
2
EL
3
EL
3
EL
3
Fig
EL
l
Lubrication
circuit
DESCRIPTION
The
lubricating
system
is
of
a
pressure
feed
type
and
consists
of
highly
efficient
components
suited
for
high
speed
running
and
output
EL
1
Page 383 of 513

LUBRICATION
CIRCUIT
Oil
drawn
from
the
oil
pan
through
the
inlet
screen
and
tube
to
the
inlet
side
of
the
oil
pump
is
delivered
by
th
oil
pump
through
the
outlet
portion
of
the
oil
pump
and
the
oil
gallery
to
the
inlet
side
of
the
full
flow
oil
filter
and
to
the
main
oil
gallery
The
main
oil
gallery
supplies
oil
to
the
crankshaft
main
bearings
and
drilled
passages
in
the
crankshaft
and
thus
oil
is
fed
directly
from
the
main
bearings
to
the
connecting
rod
bearings
Oil
injected
from
jet
holes
on
connecting
rods
lubri
cates
the
cylinder
walls
and
pistion
pins
The
oil
distributed
from
the
main
gallery
enters
the
chain
teosioner
and
the
pad
is
held
against
the
chain
by
oil
pressure
and
spring
The
oil
also
lubricates
the
timing
chain
through
the
jet
hole
located
near
the
chain
Furthermore
lubricant
is
supplied
to
each
camshaft
bearing
through
each
crankshaft
main
bearing
and
finally
to
the
011
gallery
in
the
rocker
shaft
through
the
center
camshaft
bearing
The
rocker
arm
and
valve
are
lubricated
by
the
oil
through
the
oil
gallery
in
the
rockershaft
To
this
oil
gallery
lubricant
is
supplied
through
the
center
camshaft
bearing
as
shown
in
Figure
EL
I
OIL
PUMP
Description
The
oil
pump
assembly
is
installed
on
the
bottom
of
the
cylinder
block
and
driven
by
the
distributor
drive
shaft
assembly
The
oil
pump
is
of
a
rotor
type
The
oil
pressure
is
regulated
by
the
regulator
valve
camshaft
Removal
Engine
in
vehicle
Drain
engine
oil
2
Remove
the
frunt
stabilizer
3
Remove
the
splash
shield
board
4
Detach
the
oil
pump
body
together
with
drive
gear
spindle
ENGINE
Fig
EL
2
Removal
of
oil
pump
Disassembly
Prior
to
disassembling
check
to
determine
that
the
pump
is
defective
Take
out
a
total
of
2
bolts
securing
the
pump
cover
to
the
pump
body
The
outer
and
inner
rotors
and
drive
shaft
can
then
be
disassembled
2
Applying
a
suitable
wrench
or
spanner
loosen
off
the
regulator
valve
Note
a
When
placing
the
valve
in
a
vise
use
extreme
care
not
to
distort
the
pump
body
and
cover
in
the
jaws
b
Do
not
pull
out
the
drive
shaft
pin
securing
the
driven
shaft
and
inner
rotor
The
shaft
is
press
fitted
to
the
rotor
with
the
pin
calked
n
Trochoid
Fig
EL
Oil
pump
EL
2
Page 384 of 513

ENGINE
LUBRICATION
SYSTEM
Inspection
and
repair
Clean
the
disassembled
parts
with
cleaning
solvent
and
inspect
for
defects
Inspect
the
drive
rotor
shaft
for
excessive
wear
and
scores
and
check
the
following
clearances
Side
clearance
between
Quter
and
inner
rotors
0
12
mm
0
0047
in
or
below
Tip
clearance
0
04
to
0
I2mm
0
0016
to
0
0047
in
Clearance
between
outer
rotor
and
body
0
15
to
0
21
rom
0
0059
to
0
0083
in
Adjusting
regulator
Insert
valve
in
the
body
and
measure
the
distance
A
from
the
valve
end
to
the
spring
contacting
face
inside
the
plug
See
Figure
EL
4
2
The
distance
from
the
spring
contacting
face
inside
the
valve
to
the
valve
end
amounts
to
18
mm
0
7086
in
3
On
inspecting
the
above
dimensions
determine
the
thickness
of
adjusting
shim
Shim
thickness
A
18
mm
0
7086
in
spring
length
at
compression
load
3
67
kg
8
091bs
Assembly
Assembling
the
oil
pump
is
the
reverse
order
of
disassembly
Note
3
Be
sure
no
traces
of
grinding
chips
lint
or
dirt
remain
b
Be
sure
gasket
is
not
turned
up
and
discon
tinued
OIL
PRESSURE
REGULATOR
VALVE
The
oil
pressure
regulator
valve
is
not
adjustable
At
the
released
position
the
valve
permits
oil
passing
through
a
passage
on
the
pump
cover
to
the
inlet
side
of
the
pump
Measure
the
regulator
valve
spring
dimension
to
ensure
that
the
spring
is
provided
with
the
correct
tension
e
Q
@
I
I
Adjusting
shim
2
Valve
spring
13
I
RegulatoT
valve
Fig
EL
4
RegulatoT
valve
Tightening
torque
Oil
pump
cover
bolts
kg
m
ft
lb
2
0
1
45
Oil
pump
mounting
bolts
kg
m
ft
lb
13
to
1
5
9
4to
II
Cap
nut
regulator
valve
kg
m
ft
lb
4
0
to
5
0
29
to
36
Specifications
Oil
pressure
at
idling
kgfcm2
Ibfsq
in
0
9
to
1
2
13
to
17
Regulator
valve
spirng
Free
length
mm
in
Pressured
length
mm
in
4349
l71
30
3
I
19
Regulator
valve
opening
pressure
kgfcm2
lbfsq
in
3
8
to
4
2
54
to
60
OIL
FILTER
The
oil
filter
is
of
a
cartridge
type
The
oil
filter
is
installed
or
removed
using
special
tool
The
filter
element
and
the
filter
body
are
caulked
together
I
t
must
be
replaced
with
a
new
one
as
an
assembly
When
installing
the
oil
filter
fasten
it
to
the
oil
pump
EL
3