1973 DATSUN B110 Service Repair Manual

ENGINE
MECHANICAL

I

I
J

I

v

Fig
EM
13

Engine
on

engine
stand
DISASSEMBLY

1
Mount

engine
assembly
on

engine
stand

I
Remove
the

engine
mounting
bracket
R
H

2
Install
the

engine
attachment

3
Mount
the

engine
on
the

stand

Engine
stand

ST050
10000

Engine
attachment

ST05270000

2
Remove
the
alternator

and

engine
mounting
bracket

L
H
side

3
Remove
the

crankshaft

pulley

4
Remove

the
oil

pump
together
with

the
oil
ftIter

Fig
EM
14

Oil

pump
removal
5
Remove
the

high
tension
cable
with
the

distributor

cap
on

6
Remove
the

spark
plugs

7
Remove
the

distributor

assembly

8
Remove

the
carburetor

9
Remove

the
rocker
cover

10
Remove

the
thermostat
housing

Fig
EM
15

Thermostat

housing
removal

I
L
Remove

the
manifolds

Fig
EM
16

Manifolds
removal

12
Remove

the
water

pump

EM
5

ENGINE

l
JJ

l

Ii

Fig
EM
t7
Water

pump
r
1

13
Remove
the

fuel

pump

14
Remove
the

rocker
shaft

assembly
and

push
rods

Fig
EM
18

Rocker

shaft
assembly
removal

IS
Remove
the

cylinder
head

assembly

Fig
EM
19

Cylinder
head
bolts
removal

sequence
16
Invert
the

engine

17

Remove
the
oil

pan
and
oil
strainer

Fig
EM
20

Oil
stromer
removal

18
Remove
the

timing
chain
cover
and
the
chain

tensioner

19

Remove
the
crankshaft
and
camshaft

sprockets

together
with
the

timing
chain

Fig
EM
21

Timing
chain
cover
removal

20
Rotate
the

engine
a

quarter
turn
and
remove
the

piston
and

connecting
rod

assembly
Take
off
the
con

necting
rod

bearings
at
the
same
time
and

keep
them
in

order

EM
6

ENGINE
MECHANICAL

Fig
EM
22

Piston
and

conMcting
rod

assembly
removal

21
Rotate
the

engine
a

quarter
turn
and
remove
the

flywheeL

22
Remove

the
main

bearing
cap
and

the
rear
oil
seal

Fig
EM
2J

Rear
oil
seal
removal

23
Remove
the

crankshaft

24
Remove

the
baffie

plate
and

the
crank
case
net

Fig
EM
24

Baffle

plate
and
net
removal
25

Remove
the
camshaft
after

taking
ofT
the
camshaft

plate

Fig
EM
25

Camshaft
plate
removal

26
Remove
the

valve
lifter

PISTON
AND

CONNECTING

ROD

1
Remove
the

piston
rings
with
a

ring
remover

2

Press
out
the

piston
pin
with
a

piston
pin
remover

and
an

arbor

press

Piston

pin
press
oland
STl3040000

ST13040000

EM103

Fig
EM

26
Piston

pin
removal

CYLINDER

HEAD

Remove
the

valves

using
a
valve
lifter

Valve
lifter
STl2070000

EM

ENGINE

J

I
r
I

I
J

fj

7
L

j
8

if

d1
I

ilfi
3

c

7

I
t

j

v

1

Ji

Fig
EM
27

Valve
mo
1

2
Be
careful
not
to
lose
valve

spring
seat
oil
seal
valve
collet
and
valve
rocker

spring

O

tj
AAAftIl

C

e
WWII

o

glAWle

Fig
EM
28

Valve

components

INSPECTION
AND
REPAIR

CONTENTS

PREPARATION
FOR
INSPECTION
EM
8

How
to
measure
cylinder
bore

EM
16

CYLlNOER
HEAD
AND

80ring
cylinder
EM
16

VALVES

EM
9

PISTON
PISTON
PIN
AND

Checking
cylinder
head

mating
face
EM
9

PISTON
RING

EM
18

Valve

assembly
EM
9

CONNECTING
ROD

EM
19

Valve

spring
EM
10
CRANKSHAFT
EM

20

Valve
rocker
shaft
and
rockei
arms

EM
lO
BUSHINGS
AND
BEARINGS

EM

21

Valve
lifter

and

push
rud

EM
11

Measuring
main

bearing
clearance

EM
21

Valve

guide
EM
11

Measuring
connecting
rod

bearing
clearance

EM
22

Valve
seat
inserts

EM
12

Fitting
crankshaft
bearings
EM
22

CAMSHAFT
AND

CAMSHAFT
BEARINGS
EM
14

Fitting
camshaft

bushings
EM
23

Measuring
camshaft

bearing
clearance

EM
14

MISCELLANEOUS
COMPONENTS
EM

24

Valve

timing
EM
14
Crankshaft

sprocket
and
camshaft

Checking
camshaft
for

bending
EM
14

sprocket
EM

24

CYLlNOER
BLOCK
EM
15

Flywheel
EM

25

PREPARATION
FOR
INSPECTION

L

Check
the

cylinder
head
and

cylinder
block
for

traces

of
water
leaks
before

cleaning

2

Clean
all

parts
to
remove
oil
stains
carbon

deposits
fur
and
other

foreign
matters

completely

3
Make

sure
that
all
oil
holes
are
clear
Blow
air
into

them
if

required

4

Secure

proper
assembly
carefully

EM
8

ENGINE
MECHANICAL

CYLINDER
HEAD
AND

VALVES

Checking
cylinder
head

mating
face

Fig
EMc29

Cylinder
head

I

Visually
check
for
cracks
and
flaws

2

Measure
the

surface
of
the

cylinder
head
on
the

cylinder
block
side
for

warping
If
it
exceeds
the
limit

indicated
below

regrind
affected
surface
with

a
surface

grinder

Cylinder
head
surface
flatness

Standard
Maximum

rom
in

mm
in

AI2

Engine
less
than
0
1

O
OS

0
0020
0

0039

t

C

in

00

co

0

00

2

0
Sco

co
0

0

i

Q
coco

a
ilt

BE

mIX

2
00

5

3YI
I

35
0
to
35
2
dia

1

378
to
1
3861

INTAKE
Fig
EM
30

Checking
the

cylinder
head

surface

Valve

a88embly

I

Check
each
of

the
intake
and

exhaust
valve
asc

semblies
for
wom

damaged
or
deformed
valve

caps
and

stems

Correct
or

replace
the
valve
if

required

l

EM110

Fig
EM
31

Chuking
valve
stem
diameter

t

L

coco

CO

co

BE
Ln

oq
q

od

M

2
g

tOo

18co1
O
c

0

DO

o

0

0

co

o
CO

co

J00

45
30

1
I

I

2
9
0
t
29

2
dia

1
142
to
1
l501

EXHAUST

UNIT

mm
in

Fig
EM
32

The
intake
and
exhaust

valves

EM
9

ENGINE

2
The
valve
face

or
valve
stem
end
surface
should
be

refaced

by
using
a

valve

grinder

Notes
a
Deflection
of
seat
surface

against
axis
should

be
0
03
mm
0
0012
in
or
less

b
Correctness
of

right
angle
and
out
of
round

should
be
0
01
mm
0
0004
in

or

I

c

EM111

Fig
EM
33

Valve

grinder

Note
When
the
a1ve
head
has
been
reduced
to
0
5
mm

0
0197
in

or

I
in

thickn
replace
the
al

e

Grinding
allowance

for
the
alve

stem
end
surface

is
0
5

mm
10
0197
in

or

I

Valve

spring

I
Measure
the

free

length
and
the
tension
of

each

spring
If
the
measured
value
exceeds
the

specified
limit

replace
the

spring

Spring

specifications

Free

length
46
5
mm
1

831
in

38
7

rom
at
23
9

kg

1
524
in

at
52
7Ib
Valve
closed

Valve

open
30
2
rom
at
58
5

kg

1
19
in
at
1291b

EM
l0
2

Check
each

spring
for
deformation
with
a

square

Any
springs
with

deflection
of
1
6

mm
0

0630
in
or

more
must
be

replaced

EM113

Fig
EM

34
Valve

spring
test

Valve
rocker
shaft
and
rocker
arm

I

Check
the
valve

rocker
shaft
and
rocker
arm
for

seizure
and
wear
and

repair
or

replace
as

required

Valve
rocker
arm
to
shaft
oil
clearance

0
02
to
0
05

mm
0
0008
to
0
0020
in

2

When
valve

contact
surface
of
the
valve
rocker
arm
is

worn

excessively
in

step
repair
by
means
of
a
valve

grinder
or
replace

Grinding
allowance
for
valve
contact
surface
of
the

valve
rocker
arm
is
0
5
rom
0
0197
in

or
less

t

Fig
EM

3S

val
Tocker

shaft

ENGINE
MECHANICAL

Valve
lifter
and

push
rod

L
Check
the
valve

lifter
for
wear
seizure

and
bevel

edge

contact
and

repair
or

replace
as

required

2
Measure

clearance
between
the
lifter
hole
on
the

cylinder
block
and
valve

lifter
and

replace
the
valve
lifter

when
clearance
exceeds
the
limit

Standard

rom
in
Maximum

rom
in

Valve
lifter

lifter
hole

clearance
0
02
to

0
05

0
0008
to
0
0020
0
15

0
0059

3

Check
the

push
rod
for

bending
and

damage
and

repair
or

replace
as

required

Valve

guide

Measure

clearance
between
the
valve

guide
and
valve

stem
If
clearance
exceeds
the

designated
limit

replace
the

worn

parts
or
both
valve
and
valve

guide
In

this
case
it
is

essential
to
determine
if

such
a
clearance
has
been
caused

by
a
worn
or
bent
valve

stem
or

by
a

worn
valve

guide

EXHAUST
8

3
to
8
5
dill

03266
to

T

3

10
11S11

I

FITTING
SIDE
iD

o

0

co

0

o

c

o
LOt

0
0

0

a

9

ll
l
INTAKE

1S
5

o
O
726

5312
0771
iO

0

N

0

00

E

2

UNIT
mm

in

Fig
EM

J6
Standard
valve

guide
In
valve
Ex
valve

Stem
to

guide

clearance

rom
in
0
Dl
5

to
0

045

0
0006
to

0

0018
0

040
to
0

070

0

0016
to

0

0028

Maximum

tolerance

of

above
clearance

rom
in
o
I

0

0039
0
1
0
0039

Determining
clearance

When

measuring
clearance
between
the

valve
stem
and

the
valve

guide
accurately
aids

of
a

micrometer
and

telescopic
hole

gauge
are

required
By
using
these

gauges
measure
diameter
of
the
valve
stem
in

three

places
top
center
and
bottom
Insert
the

telescopic

h
le

gauge
into

the
valve

guide
bore
and

measure
at

the
center
Subtract

highest
reading
of
valve
stem

diameter

from
valve

guide
bore
to

obtain
valve
to
valve

guide
clearance
As

a

simple
method

push
the
valve

into

the
valve

guide
and

move
to
the

left
and

right
At

which

points
if
the

tip
deflects
about
0
2

mm
0

0079

ir

or

more
it
will
be
known
that
clearance
between

the
stem
and

guide
exceeds
the
maximum

limit
of

0
1

mm
0

0039
in

Note
The
valve
should
move
in

parallel
with
the
rocker

arm

Generally
a

large
amoul
t
of
wear
occurs
in

this
direction
l

Replacement
of
valve

guide

When
a
defective
valve

guide
is
found

replace
it
in

accordance
with
the

following
instructions

I
Remove

the
defective

guide
by
means
of
a

press
and

drift

pin
under

a
2
ton

pressure
This
work

may
be

carried
out
at
normal

room

temperature
however
the

work
can
be
carried
out

more

effectively
at

higher

temperature

2
Ream

cylinder
head
side

guide
hole
at
nonnal
room

temperature

EM
l1

ENGINE

12
000
to
12
011
dia
0
4720
to

0
4724

I

t
r
1

1
1

ftlM

e

f
i1i

e

e

I

Standard

alve
guide

hole
diameter

UNIT
mm

in

Fig
EM

Valve

guide
hole

Fig
EM
38

Removing
and

refitting
valve

guide

Guide

hole
For
standard

inner
valve

guide
12

011
to
12

000
dia

0
4724

to
0

4720
dia

12

211
to
12
200dia

0
4804

to
0
4800
dia
diameter

rom
in
F
or
service

valve

guide

3

Press
new

valve

guide
into
the
valve

carefully
so
that

it
will

fit

smoothly
after

heating
the

cylinder
head
to

ISOo
to
2000C
3020

to
3920F

The
valve

guide
of
0
2
mm
0
0079
in
oversize

diameter

is
available
for
service

Interference
fit
of
valve

guide
to

guide
hole

mm
in
0
022
to
0
044

0
0009
to

0
0017
4
Ream

the
bore
with

the
valve

guide
pressed
in

using

a
valve

guide
reamer

Special
tool
STl1080000

Reaming
bore
8

000
to
8
015
mm

0
3
ISO

to
0
3160
in

5

Correct
the
valve
seat

surface
with
the
new
valve

guide
as
the
axis

Valve

seat
insert

Check
the
valve
seat
inserts
for

any
evidence

of

pitting

at
valve
contact
surface
and
reseat
or

replace
valve
seat

insert

if
the
valve
seat
insert
is
worn

excessively

The
valve

seat
insert

of
O
S
mrr
0

0197
in
oversize

is

available
for
service

Fig
EM
39

Valve
seat
correction

INTAKE

D

N

o

o

i
i

o
2Q
Qi
tQJ

g
1
181

u
xO
00391

t
4

I

J
1

11
33
5d

a

o
I

11
3191

37

080
to

37
096
dill

1
459
to
1
460
M

N

M

N

o

0

0

ON

o

0

j
EXHAUST

E

r
33
080
to

33
096
dia
N

Ol

1
302
to
1
303
c
i

1

2

I
N

0

r26
dia

11
023

0

0
8

to
1
0C

10
0315
to
0
03941

UNIT
mm

in
Cl

Q

u

o

Fig
EM
40

Standard
valve
seat
insert

EM
12