DATSUN B110 1973 Service Repair Manual

ENGINE
MECHANICAL

20
Install
the

push
rods

21
Install
the
rocker
shaft

assembly
and

tighten
the

rocker
shaft
bracket
bolts
to
the

specified
torque

Tightening
torque

2
0
to
2
5

kg
m
15

to
18

ft
Ib

Note

Tightening

operation
should
be
made

gradually
in

separating
two
or
three

stages
and

outwardly
from

the
center
bracket

Fig
EM
B
RockeT

shaft
installation

22
Install
the

intake
and
exhaust
manifolds

Tightening
torque

0
9

to
I
4

kg
m
6
5
to
10

ft
lb

Fig
EM
B4

Installation

of
intake
and

exhaust

manifolds

23

Adjust
valve
clearance
with

the

specified
di

mensions
Fig
EM
85
Valve
clearance

adjustment

Intake
at
cold

rom
in
0
35
0
0138

Exhaust

at
cold

rom

in
0
35
0
0138

24
Install
the
rocker
cover
and
carburetor

assembly

25

Install
the

water

pump
and
thermostat

Tightening
torque

0

9
to
I
4

kg
m

6
5
to
10
ft
lb

26
Install
the
crankshaft

pulley

Tighten
the

crank

pulley
bolt
to
the

specified

torque

Tightening

torque

15
to
16

kg
m

109
to
116

ft
lb

Tightening
tOI
q
e
15

JP
16

g
m

10l
to
11
ft
Ib

Fig
EM
B6

CTankshaft
pulky
installation

EM
31

ENGINE

27
Install
the
oil

pump
with
oil
filter

28
Install
the

alternator
fan
and

fan
belt

29
Install
the

fuel

pump

30

Install
the
distributor

assembly

Fig
EM
B7

Timing
maTk

Fig
EM
SS
Distributor
installation

EM
32
Notes
3
Set
the

No
1

piston
to
its

top
dead
center
of

the

compression
stroke

b
Before
installation
return

the
distributor
rotor

approximately
60

degrees
from

its

regular
posi

tion
Insert
the

assembly

meshing
the
distributor

drive

gear
and
driven

gear

After

installation
the
distributor
rotor
should

come

into
contact

with
the
mark
on
the
rotor

cap

fitting
as

shown
in
the

Figure

31

Install
the

spark
plugs
and

connect
the

distributor

to

plug
high
tension

lead
wire

32
Install
the
fuel
hoses

and
tubes

33
Install
the
clutch

cover

assembly

34
Install
the

engine
stingers
and

crankcase
ventilation

hose

35
Dismount

the

engine
from
the

working
stand

Install
the

engine
mountings

ENGINE

MECHANICAL

SERVICE
DATA
AND
SPECIFICATIONS

GENERAL
SPECIFICATION

Cylinder
arrangement
4
in
line

Displacement
cc
cu
in

mm
in
1
171
71
5

73

x
70
2
874

x
2
756

Bore
and
stroke

Valve

arrangemen
t
Over
head
valve

Firing
order
I
3
4
2

Engine
idle

rpm
800
Manual
transmission

650in
D

Automatic
transmission

Compression
ratio
8
5

Oil

pressure
Hot

at
2
000

rpm

kgfcm2
Ibfsq
in
3
0

to
3
5
43
to

50

TIGHTENING
TORQUE

Unit

kg
m

ft
lb

Cylinder
head
bolts

Flywheel
bolts
5
5
to
6
0
40

to
43

3
2
to
3

8
23

to
28

6
5

to
7
5
47
to
54

5
0

to
6

0
36
to

43

4
0

to
4
8

29
to
35

0
4
to
0
6
2

9
to
4
3

l
l
to
I
7
8
0

to
12

0

9

to
I
4
6
5

to
10

15

to
16
108
to
116
Connecting
rod
nuts

Main

bearing
cap
bolts

Camshaft

gear
bolts

Oil

pan
bolts

Oil

pump
bolts

Oil
strainer

bolts

Crank

pulley
bolts

EM
33

ENGINE

SPECIFICATION

a
Valve
mechanism

Valve
clearance
Hot

Intake
mm
in

Exhaust
0
35
0
0138

0
35
0
0138

Valve
clearance
Cold

Intake

Exhaust
mm

in

0
25
0
0098

0
25
0
0098

Valve
head
diameter

mm
in

Intake
35
1
378

29
1
142
Exhaust

Valve
stem
diameter

mm
in

Intake
7

970
to
7
985

0
3138
to
0
3144

7

945
to
7

960
0
3128
to
0
3134

Exhaust

Valve

length
mm
in

Intake

Exhaust
102
35

to
102
65
4
030
to
4

041

102
35

to
102

65
4
030

to
4
041

Valve

spring
assembled

height
111m

kg
in
lb
8
5
0

3346

46
5
1
831

30
2
58
5
1
I99

129

38
7
23
9
1
524
52
7

5
0
Valve
lift

mm
in

Valve

spring
free

length
mm

in

Valve

spring
loaded

length
mm

kg
in
lb

Valve

spring
effective
turns

Valve

guide
length
111m

in
4
100
0

1614

26
4
1

031
1

53
2
087
Valve

spring
wire

diameter
mm

in

V
alve

sp
g
coil
diameter

inm
L

Valve

guide
height
from

head

surface
111m

in
18
0
709

Valve

guide
inner
diameter

mm
in

Intake
8
015

to
8
000
0
3156
to
0
3150

Exhaust
8
015
to
8
000
0
3156
to
0

3150

EM
34

ENGINE
MECHANICAL

Valve

guide
outer
diameter
mm
in

Intake
12
044

to
12
033

0
4737
to
0
4733

Exhaust
12
044
to
12

033

0
4737
to
0
4733

Valve

guide
to
stem
clearance
mm
in

Exhaust
O
oJ5

to
0

045
0
0006
to

0
0018

0
040
to
0
070
0
0016
to
0

0028
Intake

Valve
seat
width

Intake

Exhaust
mm
in

1
3
0
0512

1
8
0

0709

Valve
sea

tangle
Intake
450

Exhaust
450

Valve
seat
interference

fit
mm
in

Intake
0
064
to

0
096
0

0025
to
0
0038

Exhaust
0
064
to

0
096
0

0025
to
0
0038

Valve

guide
interference
fit
rom
in

Intake

Exhaust
0
022

to
0
044
0

0009
to
0
0017

0
022

to
0

044
0

0009
to
0
0017

b

Camshaft
and

timing
chain

Camshaft
lobe
lift
mm

in

mm
in
0

02
to
0
08
0
0008
to

0
0031

Camshaft
end

play

5
65
0
222

Camshaft

journal
diameter
mm
in

1st
43
783

to
43

796

I
7237
to
I
7242

2nd
43
283

to
43

296

1
7041
to
1
7046

3rd
42
783
to
42
796

1

6844
to
1
6849

4th
42
283

to
42
296

1

6647
to
1
6652

5th
41

208
to
41
221

1
6224
to
1
6229

Camshaft
bend
mm
in
0
015
0
0006

Camshaft

bearing
inner

diameter
mm
in

1st
43
843
to
43
833

I
7261
to
1
7257

EM
35

2nd

lrd

4th

5th

c

Rocker
arm

lever
ratio

d

Connecting
rod

Center
distance

Bearing
thickness

Big
end
end

play

Connecting
rod

bearing

clearance

Connecting
rod
bend

e
Crankshaft
and
main

bearing

Journal
diameter

Journal

taper
and
out
of
round

Crankshaft
end

play
mm
in

mm
in

mm
in

mm
in

mm
in

mm
in

mm
in

mm
in

Maximum
service
limit
of

crankshaft

mm
in
end

play

Crank

pin
diameter

mm
in

Main

bearing
thickness
Crank

pin
taper
and
out
of
round

mm
in

mm
in

Main

bearing
clearance
mm
in

Maximum
seIVice
limit
of
main

bearing
clearance

mm
in

Crankshaft
bend

f
Piston
mm
in
ENGINE
43
333

to
43
323

l
7060
to
I
7050

42
846
to
42
836

1
6868
to
1
6865

42
333
to
42
323

1

6667
to
1

6663

41

268
to
41
258

1

6247
to
1
6243

142

12147
to

121
53

4

7812
to
4
7788

1

500
to
1

508
0

0591
to
0

0594

0
2

to
0
3
0

0079
to

0
0012

less
than
0
4

0
016

0
020

to
0
050
0
0008
to
0
0020

0
05
to

0
10
0

0020
to
0
0039

49

951
to
49

964

1

9666
to
1
9671

less
than
0
03
0

0012

0
05

to
0
15
0

0020
to
0

0059

0
3
0
0118

44

974
to
44

961

1
2706
1
177012

less
than
0
03
0

0012

1

835
to
1
827
0

0722
to
0
0719

0
020
to
0
062
0
0008
to
0
0024

0

15
0

0059

0
Gl5
to
0
05
0

0006
to
0
0020

EM
36

ENGINE
MECHANICAL

Piston
diameter

standard
mm
in

Oversize

50
mm
in

Oversize
100
mm
in

Oversize
150

mm
in

Ellipse
difference
mm
in

Ring
groove
width

Top

2nd

Oil
mm
in

Piston

to
bore
clearance
mm
in

g
Piston

pin

Pin
diameter
mm
in

Pin

length
mm
in

Piston

pin
to

piston
clearance
mm

in

Interference
fit
of

piston
pin
to

connecting

rod

bushing
mm
in

h
Piston

ring

Ring
height

Top

2nd

Oil
mm
in

Side
clearance
mm
in

Top

2nd

Oil

Ring
gap
mm

in

Top

2nd

Oil

EM
37
72
967
to
73

017

2
8727
to
2

8747

73
467
to

73
517

2
8924

to
2
8944

73
967
to
74
017

2

9121
to
2
9140

74
467
to
74
517

2
9318
to
2

9337

0
01
to

0
03
0
0004
to
0

0012

2
0
0

0787

2

0
0
0787

4
0
0
1575

0
023
to
0
043

0
0009
to
0
0017

17
447
to
17
452
0
6869
to
0

6871

0
6869
to
0
6871

65
23

to
65
48
2
5681
to
2
5779

0
006

to
0

008
0

0002
to
0
0003

at
200e

680
F

0

017
to
0
034

0
0007
to
0
0013

2
0
0
0787

2
0
0
0787

4
0
0
1575

0
04
to

0
07
0
0016
to
0
0027

0
04
to

0
07
0
0016
to
0

0027

0
04
to
0

08
0

0016
to
0

0031

0
2

to
0
35

0
0079
to
0

0138

0
2

to
0
35

0
0079
to
0

0138

0
3

to
0
90
0

0118
to
0

0354

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