TIMING CHAIN DATSUN PICK-UP 1977 Service Manual

Condition

NOISY

ENGINE

Car

knocking

Mechanical

knocking

Crankshaft

bearing

Imocking

Connecting
rod

bearing
knocking

Piston
and

cylinder

noise

Piston

pin
noise

Water

pump
noise

Air

pump
noise

Others
Engine
Tune

up

Probable
cause

Overloaded

engine

Carbon

knocking

Timing
knocking

Fuel

knocking

Preignition
misusing
of

spark
plug

This

strong
dull
noise
increases
when

engine

is

accelerated
To
locate
the

place
cause
a

misfire

on
each

cylinder
If
the
noise

stops

by
the
misfire
this

cylinder
generates
the

noise

This
is
a
little

higher
pitched
noise
than
the

crankshaft

Imocking
and
also
increases

when

engine
is
accelerated
Cause
a
misfire

on
each

cylinder
and
if
the
noise
deminishes

almost

completely
this
crankshaft

bearing

generates
the
noise

When

you
hear
an

overlapping
metalic
noise

which
increases
its

magnitude
with
the

revolution
of

engine
and
which
decreases
as

engine
is
warmed

up
this
noise
is
caused

by

piston
and
cylinder
To
locate
the

place

cause
a
misfire
on
each

cylinder

This
noise
is

heared
at
each

highest
and

lowest
dead
end
of

piston
To
locate

the

place
cause
a

misfire
on
each

cylinder

This
noise

may
be
caused

by
worn
or

damaged
earings
or
by
the
uneven
surface

of
sliding

parts

Damaged
air

pump

An
improper
adjustment
of
valve
clearance

Noise
of

timing
chain

An
excessive
end

play
on
crankshaft

Noisy
E
F
E

valve
shaft

Wear
on
clutch

pilot
bushing

Note
This
noise
will
be
heared
when

clutch
is

disengaged

ET31
Corrective
action

Use

right
gear
in
driving

Disassemble

cylinder
head
and

remove

carbon

Adjust
ignition
timing

Use

specified
octane
fuel

Use

specified
spark
plug

This
is

caused

by
worn
or

damaged
bearings

or
unevenly
worn
crankshaft
Renew

bearings
and

adjust
or

change
crankshaft

Check
lubrication

system

Same
as
the
case
of
crankshaft

bearings

This

may
cause
an
abnormal

wearing
of

cylinder
and
lower

compression
which
in

turn
will
cause
a
lower
out

put
power
and

excessive

consumption
of
oil

Overhaul

engine

This

may
cause
a
wear
on

piston
pin
or

piston
pin
hole

Renew

piston
and

piston

pin
assembly

Replace
water

pump
with
a
new
one

Repair
or

replace

Adjust

Adjust
the
tension
of
chain

Disassemble

engine
and
renew
main
bearing

Repair

Renew
bush

and

adjust
drive
shaft

Condition

ABNORMAL

COMBUSTION

backfue
afterflre

run
on
etc

Improper

ignition
timing

Fuel

system
out
of

order

Faulty
cylinder
head
etc

Others

EXCESSIVE
OIL

CONSUMPTION

Oilloak

Excessi
lo
oil

consumption

Others
Engine
Tune

up

probable
cause

Improper
ignition
timing

Improper
heat

range
of

spark
plugs

Damaged
carburetor

or
manifold

gasket

backfue
afterfire

Clol
l
ed
carburetor

jet

Improper
function
of

the
float

Uneven

idling
Run
on

Improperly
adjusted
B

C
D
D

set

pressure

Malfunction
of
anti

dieseling
solenoid
valve

Malfunction
of
auio
choke

Improperly
adjusted
valve
clearance

Excess
carbon
in

combustion
chamber

Damaged
valve

spring
backfire
afterflre

Malfunction
of

A
T
C

air
cleaner

Inoperative
ariti
backfue
valve

Loose
oil
drain

plug

Loose

or
damaged
oil

pan
gasket

Loose
or

damaged
chain
cover

gasket

Worn
oil
seal
in
front
and
rear
of
crankshaft

Loose
or

damaged
locker
cover

gasket

Improper
tightening
of
oil
filter

Loose
or

damaged
oil

pressure
switch

Cylinder
and

pioton
wear

Improper
location
of

piston
ring

gap
or

reversely
assembled

piston
ring

Damage
piston
rings

Worn

piston
ring
groove
and

ring

Fatigue
of
valve
oil
seal

lip

Worn
valve

stem

Inadequate
quality
of

engine
oil

Engine
overheat

ET32
Corrective
action

Adjust
ignition
timing

Use

specified
spark
plugs

Replace
them
with
new

parts

Disassemble
carburetor
and
check
it

Adjust
the
level
and
check
needle
valve

Adjust

Adjust

Check
or

replace

Adjust

Adjust

Remove
head
and

get
rid
of
carbon

Replace
it
with
a
new
one

Check
for
loose
vacuum
hoses

Replace
if

necessary

Replape

Tighten
it

Renew

gasket
or

tighten
it

Renew

gasket
or

tighten
it

Renew
oil
seal

Renew

gasket
or

tighten
it
but
not
too

much

Renew

gasket
and

tighten
it
with
the

proper

torque

Renew
oil

pressure
switch
or

tighten
it

Overhaul

cylinder
and
renew

piston

Remoun
t

piston
rings

Renew

rings

Repair
or
renew

piston
and

cylinder

Renew

piston
and

piston
ring

Replace
seal

lip
with
a

new
one

Renew
valve
or

guide

Use
the

designated
oil

Previously
mentioned

r

28
Remove

cylinder
head

assembly

Use

Cylinder
Head
Bolt
Wrench

STl0120000
to

remove

cylinder
head

bolts
Loosen
bolts

from

CD
to

@
as

shown
in

Figure
EM
18

Fig
EM
IS

Cylinder
head
bolt

loosening
equence

Notes
When

removing
cylinder
heao

from

engiJJe
installed

on
car
follow

the

instructions
below

a
Turn
crankshaft

until
No
I

pilton

is
at
T
D
C

on
its

compression

stroke

b
Remove

rocker
Cover
and
fuel

pump

c
To
facilitate

assembling
o
tion

scribe
8
mark

on

timing
c
8in

and

camshaft

sprocket
with

paint
be

fore
removal

d
Loosen
camshaft
bolt

and
remove

fuel

pump
drive
earn

e

Support
timing
chain

by

utilizing

Chain

Stopper
STl7420001
bet

ween

timiilg
chains
as
shown
in

Figure
EM
19

This
0

peration
eliminates

the

prob

lem
of

realigning

timing
marks

on

timing
chain
and
crankshaft

sprocket

EM538

Fig
EM
19

Supporting
timing
chain

f

Remove
camshaft

sprocket

g
Loosen

cylinder
head
bolts

and

remove

cylinder
head
Engine
Mechanical

29
Invert

engine

30

Remove
oil

pan
and

oil
strainer

EM094

Fig
EM
20

Removing
oil
traintir

and
oil

pump

31

Remove
oil

pump
and
its
drive

spindle
See

Figure
EM
20

32
Remove
front
cover

33

Remove
chain
tensioner

and

chain
slack
side

guide

EM095

Fig
EM
21

Removing
chain
ten
ioner

and
tim

ing
chain

34
Remove

timing
chain

See

Figure
EM
2l

35
Remove

oil
thrower
crankshaft

wonn

gear
and

chain
drive

sprocket

Fig
EM
22

Removing
chain
drive

Proc
et

EM
6
36
Remove

piston
and

connecting

rod

a

mbly
Extract

connecting
rod

bearings
keeping
them
in
order

I

Fig
EM
23

Removing

pilton
and

connecting
rod
aat
m
b

y

37

Remove

flywheel
and

rear

plate

Be

careful
not

to

drop
them

EM415

Fig
EM

24

Removing
flywheel

38
Remove
main

bearing
caps

Use
Crankshaft

Main

Bearing

Cap

Puller
KVIOI04ISO

to
remove
center

and
rear

main

bearing

caps
Keep
them

in
order

KVIOI04IS0

EM539

Fig
EM
25

Removing
rear

main

bearing

cap

39

Remove
two
side
seals
from

rear

main

bearing
ca

p

40
Remove
rear
oil

seal

r

Engine
Mechanical

INSPECTION
AND
REPAIR

PREPARATION
FOR
INSPECTION

CYLINDER
HEAD
AND
VALVE

CHECKING
CYLINDER
HEAD
MATING

FACE

VALVE
ASSEMBLY

VALVE
SPRING

ROCKER
ARM
AND
VALVE

ROCKER

PIVOT

VALVE
GUIDE

VALVE
SEAT
INSERTS

CAMSHAFT
AND
CAMSHAFT

BEARING

CAMSHAFT

BEARING
CLEARANCE

VALVE
TIMING

CAMSHAFT
ALIGNMENT

CYLINDER
BLOCK

HOW
TO
MEASURE

CYLINDER
BORE

CYLINDER

BORING

PREPARATION
FOR

INSPECTI
N

I

Before

cleaning
check

for

signs

of
water

and
oil
leaks
in

cylinder
block

and

head

2
Clean
oil
carbon

deposits
and

sealant
from
an

parts
Remove

gasket

3
Clean
all

oil
holes
with
solvent

and

dry
with

compressed
air

Make

sure
that

they
are

not
restricted

CYLINDER
HEAD

AND
VALVE

CHECKING
CYLINDER

HEAD

MATING
FACE

EM407

Fig
EM

34
Cylinder
head
CONTENTS

EM
8

EM
B

EM
8

EM
8

EM
9

EM
lO

EM
l0

EM
11

EM

12

EM
12

EM
12

EM
13

EM

13

EM
13

EM
14
PISTONS
PISTON
PINS
AND

PISTON
RINGS

CONNECTING
ROD

CRANKSHAFT

BUSHING
AND
BEARING

MEASUREMENT

OF
MAIN

BEARING

CLEARANCE

MEASUREMENT
OF

CONNECTING
ROD

BEARING
CLEARANCE

FITTING

BEARINGS

MISCELLANEOUS
COMPONENTS

CRANKSHAFT
AND

CAMSHAFT

SPROCKETS

CHAIN

TENSIONER
AND
CHAIN

GUIDE

FLYWHEEL

FRONT
COVER
AND

REAR
OIL
SEAL

Note

Never

remove
camshaft
bear

ings
unless

you
have
a

Suitable

machine

or

boring
Camshaft
bear

ing
in
line
If

you
once
remove

camshaft

bearings
bearing
centers

will
come
out

o

alignment
reo

conditioning
is

very
difficult
with

out
center

borings

L
Make

a
v

isual
check
for
cracks

and
flaws

2

Measure
the
surface
of

cylinder

head
on

cylinder
block

side
for

warpage
If
it
is

found
to
be

beyond

the
limit

designated
below

regrind
the

affected
surface

with
a
surface

grinder

Fig
EM
35

Checking
cylinder
head

8JJrface

EM
8
Head
surface
flatnes

Standard

less
than
0
05

mm
0
0020
in
O
lmm

0
0039
in
EM
15

EM
16

EM
16

EM
17

EM
17

EM
1B

EM
18

EM
19

EM
19

EM
20

EM
20

EM
20

Maximum

VALVE
ASSEMBLY

Check
each
intake

and
exhaust

valve
for
worn

damaged
or
deformed

valve

caps
or
stems

Correct
or

replace

any
valve
that
is

faulty

2
Valve

face
or
valve
stem
end

surface

should
be
refaced
with
a
valve

grinder

10

L
I
I

I

EM109

Fig
EM
36
Intak
and

exhaust
valve

dimensions

Engine
Mechanical

Connectlns
rod
be

rlns
undersize

SID

0
25
0
0098
Undersize

0
50
0
0197
Undersize

0
75
0
0295

Undersize

MISCELLANEOUS

COMPONENTS

CRANKSHA
AND

CAMSHA

SPROCKETS

I
Check
tooth
surface
for
flaws
or

wear

Replace
sprocket
if
fault
is

found

2
Install
camshaft

sprocket
in

posi

tion
and
check
for
rounout
If
it

exceeds
0
1

mm
0
0039
in

total

indicator

reading
repl
ce
camshaft

sprocket
Also
check

for
end

play

Camshaft
end

play

0
08

to
0
38

mm

0
0032
to

0
0150
in

EMl48

Fig
EM
71

Checking
eam

haft

sprocket
Tunaut
Unit
mm
in

Bearing
top
thickness
Crank

pin
diameter

1
493
to
1
506

0
0588
to
0
0593
49
961
to
49
974

1

9670
to
1

9675

49711
to

49
724

1
9571

to
1
9576
1

618
to
1

631

0
0637
to
0
0642

1

743
to
1

756

0
0686

to
0
0691
49461
to
49
474

1
9473

to
1
9478

1

868
to
1

881

0
0735
to
0

0741
49
211
to

49
224

1
9374
to
1
9379

Fig
EM
72

Checking

camshaft
end

play
3

Check
chain
for

damage
exces

sive

wear
or
stretch
at
roller
links

Replace
if

faulty

4
To

properly
adjust
chain
tension

or
valve

timing
camshaft

sprocket

has
a

earn

locating
plate
and
three

location
holes
Nos
I

2
and
3

Camshaft

sprocket
is

preset
at

No
I

hole
at
the

factory
If
chain

becomes
loose

adjust
it

by

setting

camshaft

sprocket
at
NO
2
hole
If

chain
is

too
loose

adjust
it

by

setting

camshaft

sprocket
at
No
3

hole

2

3

Before

adjustment
Location

match

3

After

adju5tmen
t

EM311

Fig
EM
73

Adjuating
camshaft
aprocket
location

EM
19

I
Turn

engine
until
No

I

piston
is

at
T
D
C
on

its

compression
stroke

Determine

whether
camshaft

sprocket

location
notch
comes

off
the
left
end

of
the

oblong
groove
on
camshaft

locating
plate
If
the
location
notch

is

off
the

left
end
of
the

oblong
groove

chain

stretch
is

beyond
limits

40150

EMl46

Fig
EM
74

Camshafllocating
plate

2

Turn

engine
until
No

I

piston
is

at
T
D

C

on
its

compression
stroke

setting
camshaft
on

No
2
location

hole
in

camshaft

sprocket
This
No
2

notch

should
then
be

on
the

right
end

of
the

oblong

groove
When
No
2
hole

is

used
NO
2

timing
mark
must
also

be
used

The
amount

of
the

modifica

tion
is
a

40
rotation

of
crankshaft

3

When
modification
becomes
im

possible
even

by
transferring
camshaft

location

hole

replace
chain

assembly
Engine
Mechanical

CHAIN

TENSIONER
AND

CHAIN
GUIDE

Check
for

wear
and

breakage
Re

place
if

necessary

r

I

L

EM147

Fig
EM
75
Cam

haft
dri
mechanilm

FLYWHEEL

I

Check
clutch
disc

contact
surface

with

flywheel
for

damage
or
wear

Repair
or

replace
if

necessary

2

Measure
runout
of
clutch
disc

contact
surface

with
a
dial

gauge
fit

exceeds
0
15

mm
0
0059
in

total

indicator

reading

replace
it

EM
20
EM426

Fig
EM

76
Checking
flywheel

deviation

3

Check

tooth
surfaces
of

ring
gear

for
flaws

or
wear

Replace
if

necessary

FRONT

COVER
AND

REAR
OIL
SEAL

First
check

front
cover

an
rear
oil

seal
for

worn
or
folded
over

sealing
lip

or
oil

leakage
If

necessary
install
a

new
seal
When

installing
a
new

seal

pay
attenti
on
to

mounting
direction

Note
It
is

good
practice
to

replace
oil

seal
whenever

engine
is

overhauled

Frant
t
r

r

J
I

Front

Real

EM150

Fig
EM

77
Oil

eals

of
crank

haft

2
Turn
crankshaft
until
No
I

pis

ton
is
at
T
D
C

on
its

compression

stroke

3
Make

sure
thai
camshaft
sprock

et
location
notch
and

plate
oblong

groove
are

aligned
at
their
correct

positions

4

When

installing
cylinder
head

make
sure

that
all
valves
are

apart

from
heads
of

pistons

5
Do

not
rotate
crankshaft
and

camshaft

separately
or
valves
will
hit

heads
of

pistons

6

Temporarily
tighten
two
bolts

CD

V
sJiown

in
Fig

re
EM
96

Tightening
torque

2

kg
m

14
ft
b

15
Install
crankshaft

sprocket
and

oil

pump
drive

gear
and
fit
oil

thrower

Note
Make
sure
lhat

maling
marks
of

crankshaft

sprocket
face
10
Cront

16
Install

timing
chain

Noles

a
Make

sure
that
crankshaft
and
cam

shaft

keys
point

upwards

Fuel

pump
drive

earn

2
Chain

guide

3

Chain
tensioner

4

Crank

sprocket

5
earn

sprocket

6
Chai

guide

EM439

b
Set

timing
chain

by

OOgning
its

mating
marks
with
those
oC
crank

shaft

sprocket
and
camshaft

sprock

et
at
the

right
hand
side
There
are

forty
four
chain
links
between
two

mating
marks
of

timing
chain

c
NO
2
hole
is

Cactory

adjusted

When
chain
stretches

excessively

adjust
camshaft

sprocket
at

No
3

hole

d
Use
a

set
of

timing
marks
and

location
hole

numbers
Engine
Mechanical

17
Install
chain
slack
side

guide
to

cylinder
block

18
Install
chain
tensioner

Note

Adjust
protrusion
oC
chain
ten

sioner

spindle
to
0
mm
0
in

Fig
EM
98

lmtalling
chain
tensioner

19
Press
new
oil
seal
in

front
cover

Notes

a
Front

cover
oil
seal
should
be
reo

placed
when
Cront
cover
is

disas

sembled

b
BeCore

pressing
oil
seal
into
Cront

cover

give
coating
of

engine
oil
to

periphery
of
oil
seal

c
This
oil
seal
is
a
threaded
seal

type

which
has

improved
sealing
charac

teristics
Do
not

apply
grease
to

sealing

lip

20
Install
front
cover
with

gasket
in

place

1

Timing
mark

2

Timing
mark

EM545

Fig
EM

99

Installing
fronl
COlHlr

Notes

a

Apply
sealant
to
Cront
cover
and

corners
oC

upper
section
of

cylinder

block

as
shown

in

Figure
EM
78

EM
24
b
Install
Cront
cover
with
head

gasket

in

place

c

Check

height
diCCerence
between

cylinder
block

upper
Cace
and
Cront

cover

upper
Cace
DifCerence
must

be
less
than
0
15

mm
0
0059
in

d

Note
that
difCerent

types
oC
bolts

are
used

e

Before

installing
front
cover
on

cylinder
block

apply

coating
oC

engine
oil
10

sealing
lip
of
oil

seal

EMS11

Fig
EM
lOD
Front

cover
bolts

Tightening
torque

Size
M8
0
315
in

1
0
to
1
3

kg
m
7

2
to
9
4

ft
lb

Size
M6
0
236
in

0
4
to
0
6

kg
m
2

9
to
4

3
ft
lb

21
Install
crankshaft

pulley
and

water

pump
assembly
then
set
No
I

piston
at
ToO
C
on
its

compression

stloke

Crankshaft

pulley
nu
I

tightening
torque

12
to
16

kg
m
B7
to
116
ft

lb

EM546

Fig
EM
Ol

lnstallingcran
haft

pulley
and

water

pump

22

Finally

tighten
head

bolts
to

the

specified
torque
in

three

steps

according
to
the

lightening
sequence

shown
in

Figure
EM
96

Note
thai
Iwo

types
of
bolts

are

used

Valve

spring
pressured
length

valve

open

Intake
and
exhaust

Outer

Inner

Valve

spring
assembled
height

valve

close

Intake
and
exhaust

Outer

Inner

Valve

guide
length

Intake
and

exhaust

Valve

guide
height
from
head
surface

Valve

guide
inner
diameter

Intake
and
exhaust

Valve

guide
outer
diameter

service

parts

Intake
and
exhaust

Valve

guide
to
stem
clearance

Intake

Exhaust

Valve
seat
width

Intake

Exhaust

Valve
seat

angle

Intake
and
exhaust

Valve

seat
interference
fit

Intake

Exhaust

Valve

guide
interference
fit

b
Camshaft
and

timing
chain

Camshaft
end

play

Camshaft
lobe
ift

Intake
and
exhaust

Camshaft

joumal
diameter

1st

2nd
3rd
and
4th
Engine
Mechanical

mm

kg
in
lb

mm

kg
in
lb

mm
in

mIll
in

mm

in

mm

in

mm
in

mm
in

mm
in

mm
in

rnm
in

rnm
in

mm
in

Camshaft
bend

mm
in

Camshaft

journal
to

bearing
clearance
mm

in

Camshaft

bearing
inner
diameter
rnm
in

1st
2nd
3rd
and

4th
29
5
49
0
1
IM

108

24
5

25
5
0
965

56
2

40
0
21
3
1
575

47
0

35
0
12
3
1
378
27
I

59
0
2
323

10
6
0
417

8

000
to
8
018
0
3150
to
0
3157

12
223
to
12
234

0
4812

to
0
4817

0
020
to

0
053
0

0008
to
0
0021

0
040

to
0
073

0
0016
to
0
0029

1
4

to
1

6
0
0551
to
0
0630

1

8
to
2

2
0
0709
to
0
0866

450

0
081
to
0
113

0
0032
to
0
0044

0
064
to
0
096
0

0025
to
0
0038

0
027
to
0
049
0

0011
to
0

0019

0
08

to
038
0
0032
to
0
0150

7

0
0
276

47
949
to
47
962

1
8877
to
1

8883

0
02
0
0008

0
Q38
to
0
067
0
00
I
5

to
0
0026

48
000
to
48
016

1

8898
to
1
8904

EM

28

Engine
Mechanical

TROUBLE
DIAGNOSES
AND

CORRECTIONS

Condition

I

Noisy
engine

Knocking
of
crankshaft

and
bearing

Knocking
of

piston

and

connecting
rod

Camshaft

knocking

Timing
chain
noise

Camshaft
and
valve

mechanism

knocking

Water

pump
knocking
Probable
cause

Loose
main

bearing

Seized
bearing

Bent
crankshaft

Uneven
wear

of

journal

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

mechanism

Excessive
camshaft
and

bearing
clearance

Improper
valve
clearance

Worn

adjusting
screw

Worn
rocker
face

Loose
valve
stem

i1
1
guide

Weakened
valve

spring

Seized
valve

Improper
shaft
end

play

Broken

impeller

II
Other
mechanical
troubles

Stuck
valve

Improper
valve
clearance

Insufficient
clearance
between
valve
stem

and

guide

Weakened
or

broken
valve

spring

Biting
or

damage
of
valve
stem

Poor

Quality
of
fuel

EM
31
Corrective
action

Replace

Replace

Repair
or

replace

Correct

Replace
cen
ter

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

Replace

Replace

Adjust

Clean
stem
or
ream
guide

Replace

Replace
or
clean

Use
ood
fuel

ENGINE
LUBRICATION

SYSTEM

ENGINE

LUBRICATION
SYSTEM

CONTENTS

LUBRICATION
CIRCUIT

01
L
PUMP

Removal

Installation

Disassembly
and

assembly
EL
2

EL
2

EL
2

EL
2

EL
3
Inspection

OIL

PRESSURE

REGULATOR

VALVE

OIL
FILTER

RELIEF

VALVE
EL
3

EL
4

EL
4

EL
4

E
L049

Fig
Elr
I

Lubricating
circuit

LUBRICATION

CIRCUIT

The

pressure
lubrication

of
the

engine
is

accomplished
by
a
tro

choid

type
oil

pump
This

pump

draws
the

oil

through
the
oil
strainer

into

pump

housing
and
then
forces
it

through
the
full
flow

type
oil
filter

into
the

main
oil

gallery
Part
of
the

oil
is

supplied
to
all
crankshaft

bearings
chain

tensioner
and

timing

chain

Oil

supplied
to
crankshaft

bearings
is
fed
to

connecting
rod

bearings

through
the
drilled

passages

in
the
crankshaft
Oil

injected
from

jet
holes
on

connecting
rods
Iubri

cates
the

cylinder
walls
and

piston

pins
The

other

part
of
the
oil
is

brought
to

the
oil

gallery
in
the
cylinder
head
to

provide
lubrication

of
the
valve
mechanism

and

timing

chain
as
shown
in

Figure
EL
2

ELOSO

Fig
EL
2

Lubricating
vallie
mechanism

EL
2
From
this

gallery
oil
holes

go

directly
to
all
camshaft

bearings

through
cam

brackets

Oil

supplied

through
the
No
2
and

No
3
camshaft

bearings
is
then
fed

to
the
rocker

arm
valve
and
eam

lobe

through
the

oil

gallery
in

the

camshaft
and
the

small
channel
at
the

base
circle

portion
of
each
earn

OIL

PUMP

The

oil

pump
is

secured
on
the

bottom
of
the
front
cover
with
four

bolts
and
driven

by
the
oil

pump
drive

spindle
assembly
which
is

driven

by

the
helical

gear
on
the
crankshaft

The
oil

pump
assembly
consists
of

an
oil

pressure
regulator
valve
and

outer
and
inn
r

rotors

The

spring
loaded
oil

pressure
regu

lator
valve
limits
the
oil

pressure
to
a

maximum

of
5
6

kg
em
80

psi

Removal

I

Remove
distributor

2

Drain

engine
oil
if

necessary

3

Remove

oil

pump
body
with

drive

spindle

assembly

Installation

I

Before

installing
oil

pump
on

engine
turn
crankshaft

so
that
No
I

piston
is

at
TD
C