1973 DATSUN B110 Service Repair Manual

ENGINE
MECHANICAL

Cylinder
head
recess
diameter

For

standard
insert

Intake

Cylinder
head

recess
diameter

mm
in
For
service
insert

For
standard
insert

Exhaust

For

service
insert

Interference

fit

mm
in
Intake

Exhaust

Replacing
the
valve
seat
insert

I
Old
valve
seat
insert

may
be
removed

by
boring
up

to
such
an
extent
that
the
valve
insert
is

collapsed

The
machine

depth
stop
should
be
set
so
that

boring

cannot
be
made

beyond
the
bottom
face
of
the

insert

recess
in
the

cylinder
head

2
Select
a
suitable

valve
seat
insert

and

verify
the

outside
diameter

3
Machine
the

recess
for
the
valve
seat
insert
on
the

cylinder
head

correctly
along
the
concentric
circle
to

the
valve

guide
center
so
that
the
valve
seat
insert
is

fitted
correctly

4

Heat
the

cylinder
head
to
a

temperature
of
1500
to

2000C
3020
to
3920
F

5
Fit
the
valve

seat
insert

ensuring
that
it
beds
on
the

bottom
face
of
the

recess
completely

6
The

valve
seats

newly
fitted
should
be
cut
or

ground

to
the

specified
dimensions
as
shown
in

Figure
EM
44
37
016

to
37

000
dia
1
4576
to
I
4564
dia

37
516

to
37
500
dia

I
4766

to
1
4754
dia

33
016
to
33

000
dia
1
2996
to
1
2990
dia

33
516

to
33

500
dia
1
3196

to
1
3190

dia

0
064
to

0
096

0
0025

to
0
0038

0

064
to
0
096

0
0025

to
0
0038

I

t

v

Al

r
A2

I
onl

J

J
n
llI

lltl
I
G
llW

6

UNIT
mm

in

Al
37
016
to
37
000
dia
1
4576
to

14570
dia

A2
33
016
to
33
000
dia
1
2996
to
1
2990

dia

0
34
7
to
34
5
dia
1
3659

to
1
3581
dia

O2
28
7

to
28
5

dia

I
1299
to
1
1221

dia

1
1
3

0
0512

2
1

8
0
0709

Fig
EM

41

Valve
seat
insert

EM
13

ENGINE

CAMSHAFT
AND
CAMSHAFT

BEARING

Measuring
camshaft

bearing
clearance

Measure

inner
diameter
of
the
camshaft

bearing
and

outer
diameter
of
the

camshaft

journaL

If
camshaft

bearing
clearance
is
excessive

replace
the

cylinder
block

assembly

Limit
0
15mm
0
0059
in

Standard
o
oi
to
0
07mm

M012
to
0

0627
in

Fig
EM
42

Camshaft
bearing
check

1st

2nd

Oil

clearance

mm
in
3rd

4th

5th

1st

Inner

I
2nd

I

diameter
of

I

I
camshaft

3rd

bearing

mm
in

14th
I

15th
I
Standard

0
037

to
0
060

0
0015

to
0
0024

0
027
to
0

050

0
00

to
0
0020

0
040
to

0
063

0
0016
to
0

0025

0
027
to

0
050

0
0011
to

0
0020

0
037
to

0
060

0

0015
to
0
0024

43
833
to
43

843

i

7257
to
I
7261

43
323

to
43
333

l
7050
to
1
7060

42
836
to

42
846

1

6865
to
1
6868

42
323

to
42
333

1
6663
to

1
6667

41
258
to
41
268

1

6243
to

1
6247
Wear
limit

0
15

0
0059

1

1

1

1
Valve

timing

If

the
camshaft
has

no
apparent
damage
although
some

valve
troubles
have
been
detected

compare
valve

timing

data
with

the
valve

timing
diagram
to
ensure
that

beginning
and

ending
of
stroke
for
all

cylinden
are

complying
with

specified
advance
and
retard

figures

T
D
C

DIRECTION
OF

ROTATION

INTAKE

B
D
C

Fig
EM
43
Valve

timing
diagram

Unit

degree

a
b
e
f
d
c

248
248
14
54
12

56

Checking
camshaft
for

bending

Check
the
camshaft
camshaft

journal
and
cam

surface
for
bend
wear
or

damage

If
defective
condition
exceeds
the
limit

replace
the

defective

part
s

2

Apply
a
dial

gauge
to
the
center

journal
turn
the

camshaft
and
read
the
dial

gauge
Actual

bend
is
a

half
of

the
value
indicated
on
the

dial

gauge

Standard
Bend
limit

Camshaft
bend

mm
in
0
015
0
0006
0
05
0
0020

EM
14

ENGINE
MECHANICAL

Bendin9
limit
0
05mm
0
0020
in

Standard
0
of5mm
0
0006
in

or
less

Fig
EM
44

Camshaft
bend
check

Standard

height
of
cam

mm
in
36
45
to
36
55

I
435
to
I
439

Wear

limit
of
cam

height

mm
in
0
5
0
0197

Allowable
difference
in

diame

ter
maximum
worn
and
mini

mum
worn

parts
of
camshaft

journal
mm
in
0
03

to
0
07

0
0012
to
0
0028

Maximum
tolerance
in

journal
diameter

mm
in
0
1

0
0039

Camshaft
end

play

mm
in
0
02

to
0
08

0

0008
to
0

0031

CYLINDER
BLOCK

Check
the

cylinder
head

visually
for
defects
such
as

cracks
and
flaws

2

Measure
the

top
of
the

cylinder
block
cylinder
head

mating
face
for

warping
If
the

warp
exceeds
the
limit

correct
it

EM
15
Standard
Maximum

tolerance

Surface
flatness
less
than

mm
in
0
05
0
0020
0
1
0
0039

Distortion
limit
0
10mm
0
0039
in

Standard
0
05mm
0

0020

inLor
less

Fig
EM
45

Cylinder
block

surface
check

3
Measure
the

cylinder
bore
for
out
of
round
and
wear

with
a
bore

gauge
If
wear
or
out
of
round
is
excessive

rebore
the

cylinder
walls

by
means
of
a

boring
machine

Wear
limit
0
2mm

0

0079

Fig
EM
46

Measuring
the

cylinder
bore

4
When
wear
or

out
of
round
is
minor
and
within
the

limit
remove
the

step
from
the

topmost
portion
of

the

cylinder
by
the
use

of
a

ridge
reamer
or
other
similar
tooL

ENGINE

How
to

measure

cylinder
bore

A
bore

gauge
is
used

Measure
the

cylinder
bore

at

tup

middle

Jnd

bottom

positions
in
A
and

B

directions
as

illustrated
in

Figure
EM47
and

record
the

measured

values

101o
1
50
1
9691

10013
94

EB

UNIT
mm

in

Fig
EM
47

Cylinder
bore

measuring
positions

Standard

Wear

limit

Cylinder
bore

mm
in
73

0S0
to
73

000

2

8760
to

0
2
0
0078

2

8740

Error
in

cylinder

bore

elliptic

taper
mm
in
less

than

O
OIS
0

0006

Difference
in

cylinder
bore

mm
in
O

OS
0
0020

0
2

0
0079

Boring
cylinder

When

any
of
the

cylinder
needs

boring
all
other

cylinders
must

also
be
bored
at
the
same

time

2
Select
an
oversize

piston
according
to
amount

of

wear
of
the

cylinder

EM
16
Piston

for
senrice

Outside
diameter
H

mm
in

STD
72

967
to
73
017
2

8727
to
2
8747
Piston
size

so

73467
to
73
517
2

8924
to
2

8994

oversize

100

73
967
to
74
017
2

9121
to
2
9140

oversize

ISO

74467
to
74
S17
2

9318
to
2
9337

oversize

3

By
measuring
piston
to
be

installed
at

piston
skirt

side
thrust
face
and

adding
the
mean

of
clearance

specification
the
finish
hone

cylinder
measurement
can

be
determined

EM126

Fig
EM
48

Measuring
the

piston
diameter

ENGINE
MECHANICAL

5

M

co

El

co

I

ED

I

UNIT
mm

in

Fig
EM
49

Measuring
points

Outer
diameter
of

piston
skirt
measured
value

A

Piston
eylinder
clearance

B
0
023

to
0
043

mm
0

0009
to
0
0017
in

Boring
allowance
C
0
02

rom
0
0008
in

Cylinder
bore
to
be

machined

A
B
C
A

om
to
0
02
mm

0
0004
to
0

0008
in

4

Machine
the

cylinder
bore
to

the
determined
inner

diameter

Note
To

prevent
strain
due
to

cutting
heat

bore
in

order

of

2
4
3

or
cylinders
3
4
2

5
Do
not
intend
to
bore
in
one
time
but

cut
0
05
rom

0
0020
in

or
so
at

a
time

6
When

measuring
cylinder
bore

immediately
after

boring
note
that
the

cylinder
block
is

expanded
due
to

cutting
heat

7

Finish
the

treated

cylinder
bore
to
the

final
size

by

means
of

honing

8
Measure
the
finished

cylinder
bore
for
a

elliptic
or

tapered
part

9
Measure

clearance
between
the

piston
and

cylinder

This
clearance
can
be
checked

easily
by
using
a

feeler

gauge
and
a

spring
scale

EM
17
Feeler

gauge

0
03mm
0
0012
in

Pull
force

o
5to

5kg

11
to3
3
lb

i

Fig
EM
50

Piston
to

cylinder
clearance
check

Standard

clearance

rom
in
0
023

to
0
043

0
0009
to
0
0017

0

03
0
0012
Feeler

gauge
mm
in

Extracting
force

kg
Ib
0
5
to
1
5

1
1

to
3
3

Note
If
the

cylinder
bore
is
worn

beyond
the
wear
limit

use
the

cylinder
liner

Undersize

cylinder
liners

are
available
for
service

Interference
fit
of

cylinder
liner

Cylinder
block

0
8
to
0
9
mm
0

0315
to
0
0354
in

Cylinder
liner
for

service

400

undersize
Outside
diameter

mm
in

77
05
to

77
00

3

0330

to

3
0310

77
55

to
77
50

3

0530

to

3
0510

78
05

to
78
00

3
0730
to

3

0710
72
5

to
72
6

2

854

to
2
858
Inner
diameter

mm
in

72
5
to
72
6

2
854
to
2
858

450

undersize
72

5
to

72
6

2
854
to
2

858

500

undersize

ENGINE

PISTON
PISTON
PIN
AND

PISTON
RING

Check
for

seizure
scratch
and
wear

Replace
as

required

o

10

e

O

I
l

Fig
EM
51
Piston
and

connecting
rod

assembly

2
Measure
side
clearance
of
each

piston
ring
and

ring

groove
with

the

piston
ring
installed

on
the

piston

Clearance
of
a

new

piston
and

piston
ring
should
be

as

follows

EM129

Fig
EM
52
Side
clearance
measurement

EM
18
Side
clearance

Standard
Wear

limit

mm
in

mm
in

Top
ring
0
04
to
0
Q7

02
0
0079

0
00
5

to
0
0027

2nd

ring
0
04
to
0

07

0
0015
to
0
027
0
2
0
0079

Oil

ring
0
04

to
0
08

0

0015
to

0
0031

I
0
2
0

0079

Ring
gap

Standard
Wear
limit

mm
in

mm
in

Top
ring
0
2

to
0
35

1
0
0
0394

0
0079
to

0
0138

2nd

ring
0
2

to
0
35

1
0
0
0394

0
0079
to

0
0138

Oil

ring
0
3
to
0
9

1
0
0
0394

0
01
8

to
0
0354

3

Place
the

ring
at
the
bottom
of
the

ring
traveled

part

of
cylinder
bore
in
which
it
will
be
used

Square

ring
in
bore

by
pushing
it
into

position
with
the

head

piston
Measure

gap
between
ends
of

ring
with

feeler

gauge

Gap
should
be

as
listed
above

Fig
EM
53

Ring
gap
measurement

ENGINE
MECHANICAL

Note
8
When
the

piston
ring
only
is
to
be

replaced

without
the

cylinder
bore

being
corrected
measure

gap
at
the
bottom
of
the

cylinder
where
the
wear
is

minor

b
Oversize
piston
rings
are
available
for
service

50
100
150
oversize

4

Measure
the

piston
pin
hole
in
relation
to
the
outer

diameter
of
the

pin
If
wear
exceeds
the
limit

replace

such

piston
pin
together
with
the

piston
on
which
it
is

installed

Piston

pin
diameter

mm
in
17447
to
17452

0
6869
to
0
6871

65
23
to
65
48

2
5681
to
5
779
Piston

pin
length

mm
in

Piston

pin
hole
dia

meter
mm
in
17460
to
17453

0

6874
to
0
6871

5

Fitting
of

piston
pin

Determine

the

fitting
of

the

piston
pin
into

the

piston

pin
hole
to

such
an
extent
that
it
can

be

rmger
pressed
at

room

temperature
This

piston
pin
must
be

tight
press

fitted
into

the

connecting
rod

EM131

Fig
EM
54

Piston

pin
fitting

EM
19
g

1

EM132

Fig
EM
55

Measuring
piston
pin
diameter

Piston

pin
to

piston

clearance

mm
in
0

006
to
0

008

0
0002

to
0
0003

Interference
fit
of

piston

pin
to

connecting
rod

mm
in
0
020
0
0008

CONNECTING
ROD

If
a

connecting
rod
shows

any
scratch
or
score
mark

or
is

pitted
on

both
sides
of
the
thrust
face
and
the

large

end

correct
or

replace
it

EM133

Fig
EM
56

Connecting
rod

aligner

2
Check

for
bend
or
torsion

using
a

connecting
rod

aligner
If

bend
or
torsion

exceeds
the
limit
correct
or

replace
the

connecting
rod

ENGINE

Standard

IMaXimum

Connecting
rod
bend

or
torsion

per
100
mm

or
3
94
in

length

mm
in
o
os

0
0020

0
07

0
0028
0
1

0

0039
bend

torsion

3

When

replacing
the

connecting
rod
select

the
rod

so

that

weight
difference
between
new
and
old

rods
is

within

S

gr
0

18
oz
in

unit

weight

4
Install

connecting
rods

with

bearings
on
to
the

corresponding
crank

pins
and
measure
the
thrust
clear

ance
If

the
measured

value
exceeds
the
limit

replace
such

connecting
rod

Stan
dard
Maximum

Big
end

play

mm
in
0
2

to
0
3

0

0079
to
0
Ql18
0
4
0

0IS7

l
8ig
end

plav

A

t

f

L

Fig
EM
57

Big
end

play
check

CRANKSHAFT

Check
the
crankshaft

journal
and

crank

pin
for
scars

biased
wear

and

cracks

Repair
or

replace
as

required

EM
20
27
00
to
27
05
1
063
to
1
065

19

1Ot01940

r
19
10t019
40

fO
752
to
0
764

Ii
10
75Z
to
0
764

I

c
1

r

1tf
1

I

J
X
I

34
97
to

35
03

t

11
377
to
1
379

49
951

to
49

964
dia

11
9666

to
1

96711

ALL
MAIN
BEARING

JOURNALS

Fig
EM
58

Crankshaft

Standard

Taper
out
of
round

of
crank

journal
and

crank

pin
mm

in
0
01

0

0004
44
961
to
44
974
die

11
7701
to
1

7706

ALL
CRANK
PINS

UNIT
ffim

in

Maximum

0
03

0
0012

2

Check
the

crankshaft
for
bend
If
the

bend
exceeds

the
limit

replace
the

crankshaft

Bending
limit

0
05mm
0
0020
in

Standaia
0
015mm
0

0006
in
or
less

Fig
EM
59

Crankshaft
bend
check