1979 DATSUN 210 Service Manual

EMA
54

Fig
EM
7

Cylinder
Head
Bolt

Looaening
S
quence

Fig
EM

8
Removing
Cylinder
Ht
ad

Note
Do
not

pry
between
head
and

block
as

gasket
surfaces
may
be

come

damaged

31
Invert
engine

32
Remove
oil

pan
and
oil
strainer

33
Invert

engine

34
kemove
water

pump

35

Remove
crank

pulley
and

timing

chain
cover

EMA
55

Fig
EM
9

Removing
Timing
Chain

Cover

36
Remove
i1
thrower
and

chain

tensioner

37

LQ9sen
camshaft

sprocket
bolt

and
remove
both

procket
and

timing

chain
an

assembly

3

Remove

connecting
rod

caps

and

push

piston
and

connecting
rod

assemblies

out
of
the
bores
Engine
Mechanical

hi

r

EM456

Fig
EM

l
0
Remooing
Piston
and

Connecling
Rod

Assembly

Note
Numbers
are

stamped
on
con

necting
rod
and

cap
rllnding

to
each

cylinder
Care
should
be

taken
to
avoid

wrong
comhination

including
bearing

39

Remove

flywheel
and
rear

plate

WARNING

When

remnving
flywheel
be

careful

not
to

drop
it

40

Gradually
loosen
main

bearing

cap
bolt
in

two
or
three

stages
and

remove

caps
See

Fig
EM
II

I

l
P

@
D

M458

Fig
EM
ll
Main

Bearing
Cap
Bolt

Loo

ning
Sequ
nce

41
Remove
rear
oil
seal

42
Lift
out
crankshaft

43

Remove
main

bearings
from

block
and

bearing
caps

44
Remove
baffie

plate
and
tee

net

EM460

Fig
EM
l2

Remooing
Baffle
Plate

and
Steel
Net

EM
4
45
RemoVe
camshaft

plate
Careful

ly
remove
camshaft

by

pulling
it
to

ward
the
front
of

engine

EM461

Fig
EM
j3
Camshaft
Plate

46
Remove
valve
lifter
and

keep

them
in
order

PISTON
AND

CONNECTING
ROD

I
Remove

piston
rings
with
a

ring

remover

EM292

Fig
EM
14

Remooing
PUton

Ring

2
Press
out

piston
pin
with
Piston

Pin
Press
Stand
KVIOIOS300

EM103

Fig
EM
15
R

moving
Piston
Pin

Note

Keep
disassembled

parts
in

order

CYLINDER
HEAD

I

Using
Valve
lifter
STl2070000

compress
valve

spring
and
remove

valve
collet

2

Release
Valve
Lifter
and
remove

spring
retainer

spring
oil
seal

spring

seat
and

valve

PREPARATION

FOR

INSPECTION

I

8efore

cleaning
check
for

signs

of
water

and
oille
s

2

Clean
oil
and

carbon

deposits

from
all

parts
They
should
be
clean

from

gaskets
and
sealant

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

I

Make
a
visual
check
for
cracks

and

flaws

2

Measure
surface
of

cylinder
head

on

cylinder
block
sid
for

warpage

If

beyond

designated
limit

correct

s
rface
with

a
surface

grinder

Warpage
of
urfece

Less
than

0
1
mm
0
004
in

EM108

Fig
EM

IS
Checking

Cylinder
Head

Surface
Engine
Mechanical

EM462

Fig
EM

16
Removing
Value

3
Place
valve

components
in
order

INSPECTION
AND
REPAIR

Note

Surface

grinding
limit

The

grinding
limit

of

cylinder
head

is

determined

by
the

cylinder
block

grinding
in
an

engine

Depth
of

cylinder
head

grinding

is
A

Depth
of

cylinder
block

grinding

is

6B

The
limit
is
as

follows

A
B
0
2

mm
0
008
in

VALVE

i
Check
each
of

the
intake

and

exhaust
valve
for
worn

damaged
or

deformed
valve

caps
or
stems
Correct

or

replace
the
valve
that
is

faulty

For

standard
size
of
valve

refer
to

Service
Data

and

Specifications

2

Valve
face
or

valve
stem
end

surface
should
be

refaced

by
using
a

valve

grinder

Note
When
valve
head
has
been

worn

down
to
0
5

mm
0
020
in
in

thickness

replace
the
valve

Grinding
allowance
for
valve
stem

end
surface
is
0
5
mm
0
020
in
or

less

c

EM111

Fig
EM

19
Regrinding
Valve
Face

EM
5
C

vO@
lll@8

C
CQ8@
a

EM463

Fig
EM
17
Valve

Components

Note
Take
care
not
to
lose
valve

spring
seat
oil
seal
valve
collet

and
valve
rocker

guide

VALVE
SPRING

I

Check
valve

spring
for

squareness

using
a

steel

square
and

surface

plate

If

spring
is
out
of

square
S
more

than

specified
limit

replace
with

new

ones

Out

of

square
S

Less

than

1
6
mm

0
063
inl

L

1

EM296

Fig
EM
20

Measuring
Spring

Sguareness

2

Measure
the
free

length
and
the

tension

of
each

spring
If
the
measured

value
exceeds
the

specified
limit
re

place
spring

Refer

to
Service
Data
and

pecifica

tions

EMl13

Fig
EM
21

Measuring
Spring
Teruion

VALVE

GUIDE

Measure
the

clearance
between

valve

guide
and
valve

stern
If

the

clearance
exceeds
the

specified
limit

replace
the
worn

parts
or
both
valve

and
valve

guide
In
this

case
it
is

essential
to
determine
if
such
a
clear

ance
has

been
caused

by
a
worn
or

bent
valve
stem

or

by
a
worn
valve

guide

Determining
clearance

Precise
measurement
of
clearance

between
valve

stem
and

valve

guide

needs
the

aid
of
a
micrometer

and
a

telescope
hole

gauge
By
using
these

gauges
check
the
diameter
of
valve

stem
in

three

places
top
center
and

bottom

EM030

Fig
EM
22

Checking
Valve
Stem

Diameter

Insert

telescope
hole

gauge
in

valve

guide
bore

measuring
at
center

Subtract
the

highest
reading
of

valve
stem
diameter
from
valve

guide

bore
to
obtain
the
stem
to

guide

clearance

As

an

expedient
a
valve
is

pushed

in

valve

guide
and
moved
to
the

right

and
left
If
its

tip
deflects

beyond
the

specified
limit
there
it
will
be
known

that
the
clearance
between
stem
and

guide
exceeds
the
maximum
limit

Max
allowabl

deflection

0
2

mm
0
008
in

Max
tolerance

Stem
to

guide
clearance

0
1

mm
10
004
in

ote
Valve
sbould
be
moved
in

paraIlel
with
rocker
ann
General

ly
a

large
amount
of
wear
occurs
in

this
direction
Engine
Mechanical

Max
deflection
limit

Unit

mm
in

EM467

Mea6uring
Clearance

between
Valve
Stem

and
Valve
Guide
Fig
EM
23

Replacement
of
valve

julde

I
To
remove
old

guides
use
a
drift

and

a

pie
and
drive
them
out
of

rocker

cover
side
toward
combustion

chamber

Heating
cylinder
head
to
I

SO

to
200
C
302
to
392
F
will
facili

tate

operation

T11033000

EM468

1
II

Fig
EM

24

Driving
Valve
Guide
out

of

Cylinder
Head

2

Ream
cylinder
head
valve

guide

hole

using
Reamer
STlI081000

12
2

mrn
0
480
in

dia
at
room

tempera

ture

3

Carefully
press
service

Valve

guide

into

cylinder
head

guide
hole
It
will

fit

smoothly
after

heating
cylinder

head
to
ISO
to
200
302
to
392

F

4
Ream

bore
with
valve

guide
press

ed

in

using
Reamer
STll0320000
8

mm
0
31
in
dia

Reaming
bore

8
000

to
8
015

mm

0
3150
to
0
3156
in

EM
6
EM470

Fig
EM
25

Reaming
Valve
Guide

5

Correct
va1ve
seat
surface
with

new
valve

guide
as
the
axis

VALVE
SEAT

Check

valve
seat
for
evidence
of

pitting
at
valve

contact
surface

and

reface
or

replace
if
worn

excessively

Valve
seat
insert

of
0
5

mm
0
020

in
oversize

is
available
for
service

Refaclng
valve
seat

When
width
of
valve
seat
is

wide
or

narrow

beyond

specifications
it

should
be
refaced
with
valve
seat
with

cutter
or

grinding
stone

iIT11670000

EM411

Fig
EM
26

Refacing
Valve

Seat
with

Valve

Seat
Cutter

Replaclna
valve
seat
Insert

I

Old
insert
can
be

removed

by

boring
out
until
it

collapses
Machine

depth
stopper
should
be
set
So
that

boring
cannot
continue

beyond
the

bottom
face
of
the
insert
recess
in

cylinderhead

2
Machine

cylinder
head
recess
in

concentric
circles
to
valve

guide
center

so
that
insert
will
have
correct
fit

3
Ream

cylinder
head
recess
at

room

temperature

4
Heat

cylinder
head
to

tempera

ture
of
150
to
200

C
302
to
3920F

5

Fit
insert

ensuring
that
it

seats
on

bottom
face
of
its

recess

6

Newly
fitted
valve
seat
should
be

cut
or

ground
with
suitable
seat
cutter

or

grinding
stone

7

Apply
smalliunount
of
fine

grind

ing
compound
to
valve

contacting
face

and

put
valve
into

guide
Lap
valve

against
its
seat
ntil

proper
valve
seat

ing
is

obtained

Remove
valve
and
clean
valve
and

valve
seat

VALVE
ROCKER
ARM

1

AND
SHAFT

I

Check
rocker

arm
bore
and
shaft

for
scores
or
scuffs

2
Check
clearance

between
each

rocker
arm
and
shaft

by
measuring

inner
diameter
of

rocker
arm
bore
and

outer
diameter
of
shaft

If
either
clearance
is
not
within

spec
ification

replace
rocker
arm

and
or
shaft

3
Check
valve
end
contact
surface

of
rocker
arm
for
abnormal
wear
or

scuffs

VALVE
LIFTER
AND

PUSH

ROD

I
Check
valve
lifter
for

wear
or

scuffs
Check
bottom
end
of
valve

lifter
to
make
sure
it
has
a

slight

convex

Replace
valve
lifters
that
are

scored
worn
or
have
unsmooth
bot

tom

2
Check
clearance
between
lifter

hole
on

cylinder
block
and
valve
lifter

Replace
valve
lifter
if
clearance

ex

ceeds
wear
limit

3

Check

push
rod
for

bending
and

damage

Check
end
of

push
rod
for

rough

ness
or
excessive
wear

CAMSHAFT
AND

CAMSHAFT
BEARING

CAMSHAFT

BEARING

CLEARANCE

Journal
diameters
should
be
check

ed
with
a
micrometer
and

bearings

with
an
inside
dial

gauge
Measure

ments
should
then
be

compared
to
Engine
Mechanical

determine
whether

bearings
are
worn

If
worn

beyond
0
15

mm
0
0059
in

replace
using
Camshaft

Bearing
Drift

STl6Il0000
In

press
fitting
a
new

bearing
make
certain
that

oil
holes
in

block
and

bearing
are

properly
aligned

EM474

Fig
EM
27

Measuring
Camshaft

Bearing
Inner

Diameter

CAUTION

a

After

replacing
all

bearings
finish

bearing
inner
diameters

by
line
bor

ing

b
I
nstall
welch

plug
into

cylinder

block

applying
sealant

EM475

Fig
EM
28

Replacing
Cam
haft

Bearings

CAMSHAFT
ALIGNMENT

I

Check
camshaft
camshaft

journal

and
earn
surface
for

bending
wear
or

damage
If
fault
is

beyond
limits

replace
affected

parts

2
A

bend
value
is
one

half
of
the

reading
obtained
when
camshaft
is

turned

one
full
revolution
with
a
dial

gauge
applied
to
the
cen
ter

journal

Camshaft
bend

Total
indicator

reading

Less
than

0
10

mm
0

0039
in

EM
7
s

EM476

Fig
EM
29

Checking
Cam

haft
Bend

3

Camshaft
end

play
can
be
check

ed

by
installing
camshaft
camshaft

locating
plate
and
camshaft

sprocket

in

thier

respective
p
sitions

End

play

can
then
be

checked
with
a

dial

guage

or

feeler

gauge
If
end

play
exceeds
the

specified
limit

replace
locating
plate

Max

tolerance
of
camshaft

end

pley

0
10
mm
0

0039
in

EM477

Fig
EM
3D

Checking
Cam

haft
End

Play

VALVE
TIMING

This

diagram
applies
to
all

cyl

inders

If

any
valve
is
found

beyond

specifications
one

possibility
is

that

earn
lobe
is

worJ
1
or

damaged
exces

sively
calling
for

replacement
of
cam

shaft

CYLINDER
BLOCK

I

Visually
check

cylinder
block

for

cracks
or

flaws

2

Measure

top
of

cylinder
block

cylinder
head

mating
face
for

warp

age
If

warpage
exceeds
limits
correct

it

Warpage
of
cylinder
block

surface

Less
than

0
10
mm
0

0039
in

EM303

Fig
EM

31

Checking
Cylinder
Block

Surface

Note
Surface

grinding
6mit

Grinding
limit
of

cylinder
block
is

dependent
upon
cylinder
bead

grinding
of

engjne

Depth
of

cylinder
head

grinding
is

A

Depth
of

cylinder
block

b
1

b
is

U

The
limit
is

A
B
O
imm

0
008
in

The
total
of
A
and
B
should

not
exceed
0
2
mm
0
0079
in

3
With
bore

gauge
measure

cyl

inder
bore
for
out
of
round
or

taper
If

out
f
round

or

taPer
is
excessive
re

bore

cylinder
walls
with
a

boring

machine
Measurement
should
be

taken

along
bores
for

taper
and
around

bores
for

out
f
round

Out
of
round
X
Y

Taper
A
B

60
2

36

20
0
79

I
100
3
94

Ii

B

E9

I
Unit
mm
in

EM479

Fig
EM
32

Cylinder
Bore
Mea

uring

Positions

EM478

Fig
EM
33

Mecuuring
Cylinder
Bore

Diameter
Engine

Mecha
hical

4

When
wear

taper
or

out
of

round
is

minor
and
within
limits
re

move

ridge
at

topmost

portion
of

cylinder
using
a

ridge
reamer
or
similar

tool

CYLlND
ER
BORING

I

When

any
cylin
der
needs

boring

all
other

cY
linders
must
also

be
bored

at

same
time

2

Determine

piston
oversize

accord

ing
to
amount
of

cylinder
wear

3

The
size

to
which
c

linders
must

be
honed
is

determined

by
adding

piston
to
cylinder

clearance
to
the

largest
piston
diameter
at

piston
skirt

in

thrust
direction

f

EM126

Fig
EM
34

Measuring
Piston
Diameter

E

E

5

g

or

ge

I

PI

H

i

I
lEM480

Fig
EM

35
Piston
Diameter

Measuring

Position

Calculation
of

cylinder
bore
diame

ter
to

be
machined

D

A
B
C
A
0
003
to

0
023

mm
0
0001
to
0

0009
in

Where

D

Cylinder
bore

diaIpeter
to
be

machined

A

Piston
diameter
as
measured

B

Piston
to

cylinder
bore
clear

ance
0
023
to
0
043
mm

0
0009
to
0
0017
in

C
For

honing
allowance
0
02

mm
0
0008
in

EM
8
CAUTION

a
To

prevent
strain
due
to

cutting

heat
bore
the

cylinders
in
the
order

of
2
4
1
3

b
Before

boring

any
cylinder
install

main

bearing

caps
in

place
and

tighten
to
the

specification
so
that

the
crankshaft

bearing
bores
will

not
become
distorted

from
the
bor

ing
operation

4

Do
not
cut
too
much
out
of

cylinder
bore
at
a
time

Cut
0
05
mm

0
0020
in

or
so
in
diameter

at
a

time

5

Measurement
of

cylinder
bore

just
machined

requires
the
utmost
care

since
it
is

expanded
by

cutting
heal

6
As

a
final

step
cylinders
should

be
honed

to
final
size

7

Measure
finished

cylinder
bore

for
out
of

round

or

tapered

part

8

Measure

piston
to

cylinder
clear

ance

This
clearance
can

be
checked
easi

ly
with
a
feeler

gauge
and
a

spring

balance
hooked

on
feeler

gauge
meas

uring
amount
of
force

required
to

pull

out

gauge
from
between

piston
and

cylinder

Feeler

gauge
used

0
04
mm

0
0016

inl

Extracting
force

0
5
to
1

51rg

1
1

to
3
3
b

Note

a

Whenmeasuringcleanmce
slowly

pull
feeler

gauge
straight
upward

b
It
is
recommended
that

piston
and

cylinder
be
warmed
to
20

C

680F

r

EM379

Fig
EM
36

Measuring
Pi

ton
Fit
in

Cylinder

Note
If

cylinder
bore
has
worn

beyond
the
wear
limit
use

cylinder

liner

Undersize

cylinder
liners
are
avail

able
for
service

Interference
fit
of
cylinder
liner
in

cylinder
block
ahould
be
0
08
to

0
09
mm
0
003
I
to
0
0035
in

PISTON
PISTON
PIN

AND
PISTON
RING

I
Remove
carbon
from

piston
and

ring
grooves
with
a

carbon

scraper
and

a

curved
steel
wire

The
wire
will
be

useful
in

cleaning
bottom
land

of

ring

groove
Clean
out
oil
slots
in
bottom

land
of
oil

ring
groove

2

Check
for

damage
scratches
and

wear

Replace
if
fault
is
detected

3
Measure

side
clearance
of

rings
in

ring
grooves
as
each

ring
is
installed

If
side
clearance
exceeds
the

speci

fied
limit

replace

piston
together
with

piston
ring

Max
tolerance
of

side

clearance

0
1

mm
0
0039
in
Engine
Mechanical

u

EM482

Fig
EM
38

Measuring
Ring
Gap

Note

a
When

piston
ring
only
is
to
be

replaced
without

cylinder
bore
be

ing
corrected
measure
the

gap
at

the
bottom

of

cylinder
where
the

wear
is
minor

b

Oversize

piston
rings
are
available

for
service
0
5
mm
0
020
in
1

0

mm
0
039
in
oversize

5

Measure

piston
pin
hole
in
rela

tion
to
the

outer
diameter
of

pin
If

wear

exceeds
limit

replace
piston
pin

together
with

piston
on
which
it
is

installed

Piston

pin
to

piston
clearance

O
OOS
to
0
012
mm

0

0003
to
0
0005
in

Note

Determine
the

fitting
of

piston

pin
into

piston
pin
hole

to
such
an

extent
that
it
can
be

pressed

smoothly

by
fmger
at
room
tem

perature
This

piston
pin
must
be
a

tight
press
fit
into

connecting
rod

EM481

Fig
EM
37
Me

suring
Piston

Ring

Side
Clearance

4

Measure

ring
gap
with
a
feeler

gauge
placing
ring

squarely
in

cyl

inder

Ring
should
be

placed
to
diameter

at

upper
or
lower

limit
of

ring
travel

If

ring

gap
exceeds
the

specified

limit

replace
ring

Max
tolerance
of

ring

gap

1
0
mm
0
039
in
EM131

Fig
EM
39
Piston
Pin

Fitting

CONNECTING
ROD

1
If
a

connecting
rod
has

any
flaw

on
either
side
of

thrust
face
and

large

end
correct
or

replace
it

Bend
and
torsion

per
100
mm
3

94
in

length

Less
than

0
05
mm
0
0020
in

EM

9
EM133

Fig
EM

40
Checking
Rod

Alignment

2
Check

connecting
rod

for
bend
or

torsion

using
a

connecting
rod

aligner

If
bend

or
torsion

exceeds
limit
cor

rect

or

replace

3
When

replacing
connecting
rod

select
rod

so

weight
difference
be

tween
new
and
old
ones
is
within
5

gr

0
180z

4
Install

connecting
rods
with
bear

iogs
on
to

corresponding
crank

pins

and
measure

thrust
clearance
If
meas

ured

value
exceeds
limit

replace
con

necting
rod

Max
tolerance
of

big
end

play

0
4
mm
0
016
in

l
Big
end

play

l

t

t

EM483

Fig
EM
41
Checking
Big
End

Pwy

CRANKSHAFT

I

Repair
or

replace
as

required
If

faults
are
minor

correct
with

fine

crocus
cloth

2
Check
with
a
micrometer

journals

and
crank

pins
for

taper
and
out
of

round
Measurement
should
be
taken

along

journals
for

taper
and

around

journals
for
out
of

round

If
out
of
round

or

taper
exceeds

the

specified
limit

replace
or

repair

Out
of
ound
X
Y

Less
than
0
03

mm
10
0012
in

Taper
A
B

Less
than
0
03
mm

0
0012
in

Out
of
round
X
Y

Taper
A
B

B

o

r

EM716

Fig
EM
42
Mea6Urement
Point

3
After

regrinding
crankshaft
fmish

it

t
1
t
1e
necessary

s
ize
indicated
in

the

chart
under
Service
Data

and

Specifi

cations

by
using

Ill
adequate
u
dersize

bearing
according
to
the
extent
of

required
repair

4
Crankshaft
can
be
checked
for

bend

by
placing
it

on
V

blocks
and

using
a
dial

gauge
with
its

indicating

finger
resting
on
center

journal

If
bend
exceeds
the

specified
limit

replace
or

repair

Bned
Total

indicator

reading

Less
than
0

10

mm
0

0039
in

EM137

Fig
EM
43

Checking
Crankshaft

Bend

5

Measure

crankshaft
end

play
as

shown
in

Fig
EM
44
If

beyond
the

specified
limit

replace
main

bearing

Max

tolerance
of
end

play

0
3

mm
10
012

in
Engil
e

Mechllpjcal

Crsnk5haf
end

play

EM486

Fig
EM
44

Checking
Crankshaft
End

Play

6
To

replace
crankshaft
rear

pilot

bushing
proceed
as
follows

1
Pull
out

bushing
using
Pilot

Bushing
Puller
KvloI02800

Fig
EM
45

Pulling
Out
Pilot

Bushing

2

Before

installing
a
new

bushing

thoroughly
clean

bushing
hole

3

Insert

pilot

bushing
until
dis

tance
between

flange
end
and

pilot

bushing
is
the

specified

diJ1l
nce
A

Distance
A

Approximetely

2
8
mm
0

110
in

Do
not
oil

bushing

A

Pilot

bushing

EM719

Fig
EM
46

Installing
Pilot

Bushing

Note
When

installing

pilot
bushing

be
careful
not
to

damage
edge
of

EM

l0
pilot
C

snd
not
to

imat

1

1
1

BEARING

MEASURING
MAIN

BEARING
CLEARANCE

I

Thoroughly
clean
all

bearings

Check
for
scratches
melt
score
or

wear

Replace
bearings
if
fault
is

detected

2
Crankshaft

journals
and

bearings

should
be
clean
and
free
from
dust

and

dirt
before
oil
Clearance
is
meaSured

Plastigage

EM
141

Fig
EM
47

Plastigage

3
Set

main

b
e1lfing
on

cap
block

4
Cut
a

plastigage
to
width
of
bear

ing
and

place
it

in

parallel
with
crank

pin
clear
of
oil
hole
Install

cap
on

assembly
and

tighten
them

together
to

specified

torque

fj
Tightening
torque

Main

bearing
cop
bolt

5
0
to
6
0

kg
m

36

to
43
fHb

Note

Do
not
turn
crankshaft
while

plastigage
is

being
inserted

5

Remove

cap
and

compare
width

of

plastigage
at
widest

part
with
scale

printed
in

plastigage
envelope

EM142

Fig
EM
48

Measuring
Bearing

Clearance

6
If
clearance
exceeds
the

specified

value

replase
bearing
with
an
under

size

bearing
and

grind
crankshaft

journal
adequately

Max
tolerance
of
main

bearing
clearance

0
10

mm
0
0039
in

MEASURING

CONNECTING

ROD
BEARING

CLEARANCE

I
Measure

connecting
rod

bearing

clearance
in
same
manner
as
above

tfl
Tightening
torque

Connecting
rod

cap
nuts

3
2
to
3
8

kg
m

23
to
27
fHb

2
If

clearance
exceeds
the

specified

value

replace
bearing

with
an
under

size

bearing
and

grind
the
crankshaft

journal
adequately

Max
tolerance
of

connecting

rod

bearing
clearance

0
10

mm
0
0039
in

Note
Since

bearings
are

precision

insert

type
it
is
not

necessary
to

file

bearing
caps
or
to

grindbeari

surfaces
with
an

emery
cloth
to

correct

bearing
clearance

MISCELLANEOUS

COMPONENTS

CRANKSHAFT
SPROCKET

AND

CAMSHAFT
SPROCKET

I

Check
tooth
surface
for
flaws
or

wear

Replace
sprocket
if
fault
is
Engine
Mechanical

found

2

Install
camshaft

sprocket
in

posi

tion

and
check
for
runout

If
runout
exceeds
the

specified

limit

replace
camshaft

sprocket

Runout

Total
indicator

reading

Less
than
0

1
mm
0
004

in

EM309

Fig
EM
49

Checking
Cam

haft

Sprocket
Runout

CHAIN
AND

CHAIN

TENSIONER

I

Check
chain
for

stepped
wear

scratches
or
other

problems
on

roller

links

Replace
if

necessary

2
Check
chain
tensioner
for
wear

breakage
or

any
other
fault
which

would

interfere
with

proper
chain

function

Replace
if

necessary

FLYWHEEL

I

Check

ring
gear
If
worn
or
dam

aged
excessively
replace

2

Clutch

contacting
face
of

fly

wheel

should
be
smooth
If

worn

damaged
or

roughened
beyond
limits

repair
or

replace

3
Before

disassembling
and
after

re

assembling
check

flywheel
run
out

with
a

dial

gauge
This
check
is

made

by
rotating
flywheel
with
dial

gauge

finger
resting
on
the
farthest

point

from
center
of

flywheel
If
it

exceeds

the

specified
limit

replace
it

EM
II
Runout

Total
indicator

reading

Less

then

0
15
mm
0
0059
in

Fig
EM
50
Checking
Flywheel
Runout

Note
Removal
and
installation
of

ring

gear
requires
use
of

hydraulic

press
It
is

also
necessary
to
heat

ring

gear
to
180
to
2000C
356

to

3920F
thus
facilitating
removal

and
installation
Do
not
heat

ring

gear
to
more
than
3000C
5nOF

To
do
so
could
result
in

impaired

hardness
of

ring

gear

CRANKSHAFT

FRONT
AND

REAR
OIL

SEAL

First
check
front
and
rear
oil

seals

for
worn
or
folded
over

sealing
lip
or

oil

leakage
If

necessary
replace
with
a

new
seal
When

installing
a
new
seal

pay
attention

to

mounting
direction

Note
It
is

good
practice
to

renew
oil

seal
whenever

engine
is
overhauled

Front

u
Front

Rear

EM487

Fig
EM

51
Cranhhaft
Oil
Seal