check engine DATSUN B110 1973 Service Workshop Manual

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

ENGINE
MECHANICAL

Standard
Maximum

Crankshaft
bend

mm
in
0
05

0

0020
0

015

0

0006

Note

When
measuring
bend
use
a
dial

gauge

Bend
value
is

a
half
of
the
reading
obtained
when

the
crankshaft
is
turned
once
with
the
dial

gauge

applied
to

its
center
journal

3

After
regrinding
the
crankshaft
fmish
it
to
the

necessary
size
indicated
in
the
lists

on

pages
EM
25

by

using
an

adequate
undersize
bearing
according
to
the

extent
of

required
repair

4
Install
the
crankshaft
in
the

cylinder
block
and

measure
the
thrust
clearance

Fig
EM
60

Crankshaft
end

pldy
check

Standard
Limit

Crankshaft
free
end

play
rom

in
0
05
to
0
15

0
0020
to
0
0059
0
30

0
D118

5
Check
the

main
drive
shaft

pilot
bearing
at
the
rear

end
of
the
crankshaft
for
wear
and

damage

Replace
it
if

any
defects
are
detected
BUSHING
AND
BEARING

Measuring
main

bearing

clearance

Check
all

bearings
and

bushings
for
seizure
melt
scar

and

burr

Replace
bushings
if

any
defects
are
detected

2

Wipe
off
oil

and
dust

especially
the
rear
of
the

bushing

3

Set
the
main

bearing
on
the

cap
block

Scale

Plastigage

EM141

Fig
EM
61

Plastigage

4
Cut
a

plastigage
to
the

width
of
the

bearing
and

place

it
in

parallel
with
the
crank

pin
getting
clear

of
the
oil

hole

Install
the

cap
on
the
assembly
and

tighten
them

together
with
the

specified
torque

Tightening
torque

5

0
to
6

0

kg
m
36

to
43

ft
lb

Note
Be

sure
not
to
turn

the
crankshaft
when
the

plastigage
is

inserted

5
Remove
the

cap
and
measure
width
of
the

plastigage

at
its
widest

part
with
the
scale

printed
in
the

plastigage

envelope

EM
21

ENGINE

Pig
EM
62

Bearing
clearance
check

Measuring
connecting
rod

bearing
clearance

Measure

connecting
rod

bearing
clearance
in
the

same

manner

Tightening

torque

3
2
to
3

8

kg
m
23

to
28
ft
Ib

Bearing
oil
clearance

Standard
Wear
limit

Main

bearing

clearance

rom
in
0
020

to
0
062

0

0008
to
0
0024
0
1

0
0039

Connecting
rod

bearing

clearance

mm
in
0
020

to
0
050

0
0008
to

0
0020
0
1

0
0039

2
If
clearance
exceeds
the

specified
value

replace

bearing
with
an

undersize

bearing
and

grind
out
the

crankshaft

journal
adequately
Fig
EM
63

Bearing
clearance
check

Fitting
crankshaft
bearings

I
Set

the
bushings
on
the
main

bearing
cap
and
the

cylinder
block

bearing
recess
and

tighten
the

cap
bolts
to

the

specified
torque

Tightening
torque

5
0
to
5
3

kg
m
36
to
38
ft
lb

2
Loosen
the

cap
bolt
on

one
side
and
measure

clearance
between

the

cap
and

cylinder
block
side

n
n

u

ii
Bearing

6
Weight

EM143

Fig
EM
64

Bearing
crush
check

EM
22

Bearing
thickness

mm

in

STD
I
No
1

I
No
2

I

I
I
1
585

to
1
565

No

3

0

0624
to
0
0616

I
No
4

I

No
5

I

NO

11

0
25

I
1

710
to
1

690

undersize
No

3

0
0673
to

0
0665

I
No
4

I

No
5

I

No
1

I

I
No
2

I

0
50

I
1
835

to
1
815

undersize
No
3

0

0722
to
0
0715

No
4

No
5

I

I
No
1

I
No
2

I

0
75

I
11
960
to

1
940

undersize
No
3

0

0772
to
0

0764

I
No
4

I

I
No
5

I
ENGINE

Camshaft

journal

diameter
mm

in

D
783
to
43
796

1
7237

to
1
7242

43
283
to
43
296

1
7041
to
1
7046

42

783
to

42
796

1

6844
to

1
6849

42
283
to
42
296

1
6647
to
1
6652

41
208

to
41
221

1

6224
to
1
6229

43

533
to
43
546

11
7139
to
1
7144

43
023
to
43
036

1
6983
to
1
6943

42

523
to
42
536

1
6741
to
1
6746

42
023
to
42

036

1
6544
to
1
6550

40
958
to

40
971

1
6t25
to
1

6
30

43
283
to
43
296

1
7041
to
1
7046

42

773
to
42
786

1
6840
to
1
6845

42

273
to
42
286

11
6643
to
1
6648

41
773
to
41
786

1

6446
to
1
6451

40
708
to
40
721

1

6027
to
1
6023

43

033

to
43
046

1
6942
to

1
6947

42
523

to
42

536

1
674t
to

1
6746

42
023
to
42

036

1

6554
to
1
6550

41
523
to
41
536

1
6348
to
1

6353

40
458
to
40
471

1
5928
to
1
5933

EM
24
MISCELLANEOUS
COMPONENTS

Crankshaft

sprocket
and
camshaft

sprocket

I

Check
tooth
surfaces
for

flaws
and
wears

Replace
defective

sprocket

2

Install
the
camshaft

sprocket
in

position
and

check

for
run
out

If
it
exceeds
0
1
mm

0
0039
in

replace
the

camshaft

sprocket

Check
the

camshaft

thrust
deviation
If
it
is

deviated

replace
the

camshaft

locating
plate

f

EMl48

Fig
EM
66

Camshaft
sprocket
run
out
check

Clearance

limit
0
Imm

0

0039
in

SJ
l

ldar
Q
0
02

to
0

08mm

0

0008
to
0

0031
in

Fig
EM
67
Check

locating
plate
thrust
clearance

ENGINE
MECHANICAL

Standard

mm
in

Camshaft

sprocket

run
out

Thrust
deviation
O
OIS

0
0006

Locating
plate

thrust
clearance
0
02
to

0
08

0
0008
to
0
003
Wear
limit

mm
in

less
than

0

0

0039

O

OS

0

0020

0
1

0

0039

3

Check
the

chain
for

damage
excessive

wear
and

stretch
at

its
roller

links

Replace
chain
if

defective
Flyw
heel

I

Check
the

clutch
disc
contact

surface
of
the

flywheel

for

damage
and

wear

Repair
or

replace
if

necessary

2

Measure
deviation
of
the

clutch
disc
contact
surface

with
a
dial

gauge

If
it

exceeds
0
2

mm
0
0079
in

replace
it

3

Check

tooth
surfaces
of
the

ring
gear
for

flaw
and

wear

Replace
if

necessary

Note

Replace
the

ring
gear
at

about
180
to

2000C
356

to
3920

Fl

ENGINE
ASSEMBLY

PRECAUTION

CYLINDER
HEAD

PRECAUTION
CONTENTS

EM
25

EM

25

Use

thoroughly
cleaned

parts
Particularly
make

sure

that
oil

holes
are
clear

of

foreign
matter

2

When

installing
sliding
parts
such
as

bearings
be

sure

to

apply
engine
oil

to
them

3

Use
new

packings
and
oil
seals

4

Keep
tools

and
work
benches
clean

S

Keep
the

necessary
parts
and
tools
near
at
hand

6
Be
sure
to

follow

specified
tightening
torque
and

orders

CYLINDER
HEAD

Assembly
of
valve
and
valve

spring

Set
the
valve

spring
seat
in

position
and
fit
the
valve

guide
with
the

oil

lip
seal

Assemble
the

parts
in
order
valve

spring
spring

retainer

valve
collet
and

valve
rocker

guide
PISTON
AND
CONNECTING
ROO

ASSEMBLING
ENGINE
EM
25

EM
26

I
I

11

00
I
I

I

t

I
J

ftr

J

J

1

l

J

r

N

1

n
r

VI

I

I

C

I

L

I

Fig
EM
68
Valve
installation

Note
Make

sure
that
the
valve
face
is
clear
from

foreign

matters

PISTON
AND

CONNECTING

ROD

Assemble

piston
piston
pin
and

connecting
rod

assorted

according
to

cylinder
number

for

every
cylinder

EM
25

ENGINE
MECHANICAL

3

Apply
engine
oil

to
the
main

bearing
surfaces
on

both
sides
of
the

cylinder
block
and

cap

Install
the
crankshaft

4
Install
the
main

bearing
cap
and

tighten
the

bolts

with

specified
torque

Tightening

torque

5
0

to
6

0

kg
m
36

to
43

ft
lb

Notes
a

Arrange
the

parts
so
that
the
arrow

mark
on

the

bearing
cap
is
faced
toward
the
front
of
the

engine

b
Prior
to

tightening
the

bearing
cap
bolts

place

the

bearing
cap
at
a

proper
position
by

shifting

the
crankshaft
in
the

axial
direction

c

Tighten
the

bearing
cap
bolts

gradually
in

separating
two
to

three

stages
and

outwardly
from

the
center
beari

ng

d
After

securing
the

bearing
cap
bolts
ascertain

that
the
crankshaft

can
be

easily
rotated

5
Make
sure

that
the
crankshaft
end

play
is

correct

Crankshaft
end

play

0
05

to
0
15

rom
0
0020
to

0
0059

in

Fig
EM
73

Crankshaft
end

play
check

EM
27
Fig
EM
73
t

Applying
adhesive

6
Install
the
rear
oil
seal

7
Install
the

flywheel
securely

using
the

lock
washers

and

tighten
the
bolts
with

specified

torque

Tightening
torque

6
5
to
7
5

kg
m
47

to
54

ft
lb

Iii

Fig
EM
74

Flywheel
installation

8
Rotate
the

engine
a

quarter
turn
and
install
the

piston
rod

assembly

ENGINE

Fig
EM
75
Piston
and

connecting
rod

assembly
installation

Notes
8

I
nsert

the

pistons
in
the

corresponding
cyl

inders

b

Apply
engine
oil
to

parts
as

requried

c

Arrange
pistons
so

that
the
F
mark
on
the

piston
is
faced
to

the
front
of
the

engine

d
Install

piston
rings
at
180
to
each
other

avoiding
to
fit
them
in
the
thrust
and

piston

pin

axial
directions

Fig
EM
76

Connecting
rod

cap
installation

Note

Arrange
connecting
rods
and

connecting
rod

caps

so
that
the

cylinder
numbers
are
faced

toward
the

same
direction

EM
28
q

Install

the

connecting
rod

cap

Tightening

torque

32
to
3
8

kg
m
23
I

to
7
S
ft
lb

10
Make

sure
that
end

play
of
the

connecting
rod

large

end
is

correct

Big
end

play

j

I

Fig
EM
77

Big
end

play
check

Big
end
end

play
0
2

to
0
3

0

0079
to
0
0118

11
Install
the
camshaft
and

crankshaft

sprockets

temporarily
for

adjustment
of
the
tooth

height
by

using

adjusting
washers

Height
difference

mm
in
less
than
O
S

0
0197

Adjusting
washer

thickness
mm

in
O
IS
0
006

Fig
EM
78

Adjusting
sprocket
tooth

height

ENGINE
MECHANICAL

o

Match
mark

Key
groove

Fig
EM
78
1

Setting
chain

12

Install
the
timing
chain
and

camshaft

sprocket

Camshaft

sprocket

tightening
torque

4

0
to
4
8

kg
m
29

to
35
ft
lb

Fig
EM

78
2
Chain
tensioner
installation

Fig
EM
7B
Cam

sprocket
gear
installation

Notes
a
Make

sure
that
the

camshaft

sprocket
dowel

hole
and
crankshaft

sprocket
key
are
in
line
and

both
the
dowel
hole
and

key
are
located
down

ward
b
Set
the

timing
chain

making
its

mating
marks

meet
with
those
of
crankshaft
sprocket
and

camshaft

sprocket
at
the

right
hand
side

13
Install
the

timing
chain
tensioner
and

tighten
the

tensioner
bolts
to
a

torque
of
0
6
to
0
8

kg
m
4
3

to
5

8

ft
lb

Check
the
tensioner

spindle
projection

Wear
limit

Spindle
projection

mm
in
15
0

591

Fig
EM
79

Checking
the
tension

spindle
projection

14
Install
the
crankshaft
oil

thrower

15

Install
the

new
oil
seal
to
the
front
cover
The

front
cover
oil
seal
should
be

replaced
when
the
front

cover
is

disassembled

16

Install
the

front
cover

applying
the

sealing
agent
to

both
surfaces
of
the

gasket

Tightening
torque

0
5
to
0
7

kg
m
3
6
to
5
1

ft
lb

EM
29

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