1973 DATSUN B110 engine

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

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

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

y
1

S
E
R
V
E
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0

X

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I

X

M
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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

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

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

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

ENGINE

Note
Do
not
oyerlasten
the
filter
or
oil

leakage
may

occur

The

oil
filter
can
be

removed

easily

using
special
tool

STl9320000
It

may
also
be
removed

easily

using
wire

type
filter
remover

l

t

1

h

T

Fig
EL
5

Oil

filteT

TROUBLE
DIAGNOSES
AND
CORRECTIONS

Condition
Probable
cause

Corrective
action

Oil

leakage

Damaged
or

cracked

body
cover

Replace

Oil

leakage
from

gasket

Replace

Oil

leakage
from

regulator
valve

Tighten
or

replace

Oil

leakage
from
blind

plug
Replace

Decreased
oil
Leak
of
oil
in

engine
oil

pan
Correct

pressure

Damaged
or
worn

pump
rotors

Replace

Defective

regulator

Adjust
or

replace

Used
of

poor
quality
engine
oil

Replace

Noise

Excessive
backlash
in

pump
gears

Replace

EL
4