1979 DATSUN 210 checking oil
[x] Cancel search: checking oilPage 48 of 548
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
Page 51 of 548
9
Make
SUre
there
is
proper
end
play
at
crankshaft
Crankshaft
end
play
0
05toO
15mm
0
OO20
to
0
0059
in
laJlk
h
end
play
J
EM486
Fig
EM
63
Checking
Crank
luJft
End
Play
10
Install
rear
oil
seal
using
suitable
drift
Fig
EM
64
n
talling
Rear
Oil
Seal
II
Install
rear
plate
12
Install
flywh
el
secwely
and
tighten
bolts
to
specified
torque
dl
Tightening
torque
Flywheel
and
drive
plate
A
14
engine
fixing
bolts
8
0
to
9
0
kg
m
58
to
65
ft
Ib
Drive
plate
A
15
engine
fixing
bolts
8
5
to
9
5
kg
m
61
to
69
ft
b
Fig
EM
65
n
talling
Flywheel
13
Rotate
engine
quarter
turn
and
install
piston
rod
assembly
using
Pis
Engine
Mechanical
ton
Ring
Compressor
EM03470000
EM497
Fig
EM
66
tolling
Platon
Rod
Assem
bly
Note
a
Insert
pistons
in
L
r
nding
cyl
inders
b
Apply
engine
oil
to
sliding
parts
c
Arrange
pistons
so
number
stamped
on
piston
head
faces
to
front
of
engine
d
Before
installing
piston
piston
rings
should
be
positioned
as
shown
in
Fig
EM
67
Second
ring
Oil
ring
lower
rail
EM49B
Fig
EM
67
Positioning
Piston
Ring
Gap
14
Apply
engine
oil
to
bearing
surfaces
dl
Tighte
ning
torque
Connecting
rod
cap
nuts
3
2
to
3
8
kg
m
23
to
27
ft
b
EM499
Fig
EM
68
Tightening
Connecting
Rod
Cap
Note
Am11
connecting
rods
and
connecting
rod
caps
so
cylinder
numben
face
in
same
direction
EM
14
I
S
Make
sure
there
exists
proper
end
play
at
connecting
rod
big
end
See
Fig
EM41
Big
end
play
0
1
to
0
2
mm
0
004
to
0
008
in
16
Insert
crank
sprocket
keys
in
keyways
of
crankshaft
Install
cam
shaft
and
crankshaft
sprockets
tempo
rarily
for
adjustment
of
tooth
height
by
using
adjusting
washers
Height
dif
Less1
h
l11
0
5
mm
0
020
in
Adjusting
washer
thickness
0
5
mm
10
020
in
EM500
Fig
EM
69
Adju
ting
Sprocket
Tooth
Height
17
Install
tinting
chain
and
cam
shaft
sprocket
with
their
markings
properly
aligned
See
Fig
EM
70
Then
set
No
I
piston
at
T
D
C
on
compression
stroke
See
Fig
EM
71
Oil
sprocket
teeth
and
chain
with
engine
oil
Match
mark
Key
groove
EM501
Fig
EM
70
Aligning
Markinga
Note
Make
sure
camshaft
sprocket
dowel
hole
and
crankshaft
sprocket
key
are
in
line
and
both
dowel
hole
and
key
are
located
downward
Page 52 of 548
m
k
camSM9tJ
down
hole
Key
groove
EM767
Fig
EM
11
Setting
No
I
Piston
atT
D
C
18
Tighten
camshaft
sprocket
bolt
ifl
Tightening
torque
Camshaft
sprocket
bolt
4
to
4
8
kg
m
29
to
35
fHbl
EM502
Fig
EM
72
Tightening
Camshaft
Sprocket
Bolt
19
Install
chain
tensioner
and
tight
en
tensioner
attaching
bolts
ifl
Tightening
torque
Tensioner
enaching
bolt
0
6
to
0
8
kg
m
14
3
to
5
8
ft
b
EM503
Fig
EM
73
Installing
Chain
Tensioner
20
Check
projection
L
of
ten
sioner
spindle
If
projection
L
exceeds
the
speci
fied
limit
replace
chain
Engine
Mechanical
Correct
projection
L
Less
than
15
mm
0
59
inl
lEM504
Fig
EM
74
Checking
Projection
of
Tf
nsioner
Spindle
21
Correctly
install
oil
thrower
in
front
of
camshaft
sprocket
22
Press
new
oil
seal
in
timing
chain
cover
F
ran
t
cover
oil
seal
should
be
replaced
when
front
cover
is
disassem
bled
23
Install
timing
chain
cover
with
gasket
in
place
Note
When
inatalling
oil
seal
apply
coating
of
engine
oil
to
mating
shaft
to
prevent
scratches
and
fold
ed
lip
Also
apply
coating
of
oil
to
periphery
of
oil
seal
ifl
Tightening
torque
Timing
chain
cover
bolts
0
5
to
0
7
kg
m
3
6
to
5
1
ft
Ib
Z5
1
o
j
I
t
f
4
EM455
Fig
EM
75
Installing
Timing
Chain
Covtr
24
Install
water
pump
with
gasket
in
place
ifl
Tightening
torque
Water
pump
attaching
bolts
0
9
to
1
4
kg
m
16
5
to
10
1
ft
bl
25
Install
crank
pulley
then
con
firm
and
set
No
I
piston
at
T
D
C
on
compression
stroke
EM
15
ifl
Tightening
torque
Crank
pulley
nut
15to
20
kg
m
108
to
145
ft
b
26
Invert
engine
Install
oil
stniiner
and
oil
pan
using
new
gasket
and
oil
seal
Note
Give
coating
of
sealant
to
seam
between
oil
pan
gasket
and
oil
pan
oil
seal
ifl
Tightening
torque
Oil
pan
bolts
0
4
to
0
6
kg
m
12
9
to
4
3
ft
lb
27
Install
gasket
and
cylinder
head
Note
Do
not
apply
sealant
to
any
other
part
of
cylinder
block
and
head
surface
28
Tighten
cylinder
head
bolts
ifl
Tightening
torque
Cylinder
head
bolts
7
0
to
7
5
kg
m
51
to
54
ft
IM
Note
a
One
of
cylinder
head
bolts
is
smal
ler
in
diameter
than
others
and
has
a
hollow
head
It
should
be
install
ed
on
right
side
center
of
cylinder
head
b
Tightening
should
be
made
in
two
or
three
steps
finally
torquing
to
specification
c
Retighten
cylinder
head
bolt
after
engine
has
been
warmed
up
Refer
to
Carburetor
Idle
R
P
M
and
Mixture
Ratio
EF
Section
for
Adjustment
and
Inspection
EM505
Fig
EM
76
Cylinder
Head
Bolt
Tightening
Sequence
Page 75 of 548
OIL
PUMP
The
oil
pump
and
filter
assembly
is
bolted
to
the
right
side
of
the
cylinder
block
and
can
be
removed
with
the
engine
in
pl
c
The
oil
pump
which
is
driven
by
a
gear
on
the
camshaft
has
the
full
flow
element
type
filter
in
stalled
to
the
oil
pump
cover
REMOVAL
I
Place
a
suitable
container
under
oil
pump
2
Remove
three
bolts
attaching
oil
pump
and
filter
assembly
and
with
draw
assembly
3
Separate
oil
filter
from
oil
pump
4
Ciean
off
old
gasket
from
mating
surfaces
i
E
L043
F
EL
2
R
moving
Oil
Pump
Asso
mbly
INSTALLATION
I
Install
oil
filter
to
oil
pump
2
Locate
oil
pump
and
filter
as
sembly
or
cylinder
block
using
a
spacer
and
new
gasket
Secure
with
three
bolts
l
l
Tightening
torque
Oil
pump
securing
bolts
0
9
to
1
4
kg
m
6
5
to
10
1
ft
lbl
3
Check
oil
level
and
add
oil
if
necessary
4
Start
engine
and
check
for
oil
leaks
5
Remove
the
container
Engine
Lubrication
System
DISASSEMBLY
AND
ASSEMBLY
I
Remove
bolt
securing
pump
cover
to
pump
body
Separate
pump
cover
from
pump
body
2
Slide
out
outer
rotor
from
pump
body
3
Remove
oil
pressure
regulator
plug
washer
shim
spring
and
valve
4
Assemble
oil
pump
in
reverse
order
of
disassembly
Note
a
When
placing
oil
pump
in
a
vice
use
extreme
care
not
to
distort
pump
body
and
cover
in
the
jaws
b
Do
not
pull
out
drive
shaft
pin
securing
drive
shaft
and
inner
rotor
Shaft
is
press
fitted
to
rotor
with
the
pin
caulked
EL044
Fig
EL
3
Oil
Pump
l
l
Tightening
torque
Oil
pump
cove
bolt
0
39
to
0
5
2
kltm
2
8
to
3
8
ti
Ib
Regulator
valve
plug
4
0
to
5
0
kltm
29
to
36
ft
bl
INSPECTION
Wash
all
parts
in
cleaning
solvent
and
dry
wiih
compressed
air
I
hispect
pump
body
and
cover
for
cracks
or
excessive
wear
2
Inspect
pump
rotors
for
excessive
wear
3
Check
inner
rotor
shaft
for
looseness
in
pump
body
4
Inspect
regulator
valve
for
wear
or
scoring
5
Check
regulator
spring
to
see
that
it
is
not
worn
on
its
side
or
collapsed
6
Using
a
feeler
gauge
check
tip
clearance
00
and
outer
rotor
to
body
clearance
CD
shown
in
Fig
EL
4
EL059
1
Outer
rotor
to
body
clearance
2
Tip
clearance
3
Gap
between
rotor
and
stnight
edge
4
Gap
between
body
and
straight
edge
ig
EL
4
Checking
Rotor
Clea
nce
7
Place
a
straight
edge
across
the
face
of
pU
mp
and
depress
it
slightly
as
shown
in
Fig
EL
4
Check
gap
@
between
body
and
straight
edge
or
gap
@
between
rotor
and
straight
edge
Gap
0
03
to
0
06
mm
0
0012
to
0
0024
in
Rotor
side
clearance
rotor
to
bot
tom
cover
clearance
with
gasket
should
satisfy
the
specifications
Standard
Wear
limit
Rotor
side
clearance
mm
in
0
04
to
0
08
rotor
to
bottom
cover
0
0016
to
0
031
0
20
0
0079
Rotor
tip
clearance
V
mm
in
Less
than
0
20
0
0079
0
12
0
0047
Outer
rotor
to
body
mm
in
0
15
to
0
21
0
50
0
0197
clearance
CD
0
0059
to
0
083
EL3
Page 82 of 548
Cooling
System
TEM
COUPLlNG
Non
Califomia
model
equipped
with
air
conditioning
Tem
coupling
is
a
type
of
fan
coupling
which
is
provided
with
a
temperature
control
system
The
conventional
coupling
always
slips
the
fan
at
a
high
speed
under
a
constant
ratio
regardless
of
the
engine
cooling
requirement
The
slipping
ratio
of
the
Tem
coupling
however
is
properly
changed
with
the
cooling
requirement
ON
denotes
that
cooling
is
required
and
the
fan
operates
up
to
about
2
900rpm
When
high
cooling
is
not
required
during
cold
season
with
the
engine
warmed
up
etc
the
oper
ation
is
placed
under
OFF
condition
and
the
fan
slips
at
about
2
050
rpm
The
coiled
bimetal
thermostat
installed
on
the
front
center
portion
of
the
Tem
coupling
detects
temperature
of
air
passing
through
the
radiator
The
air
temperature
is
directly
relative
to
the
engine
coolant
tempera
ture
and
the
inside
slide
valve
is
opened
or
closed
as
required
and
thus
the
ON
OFF
control
is
performed
When
the
air
temperature
rises
the
bimetal
is
expanded
and
the
valve
is
opened
silicone
oil
is
forwarded
to
the
groove
that
transmits
torque
and
the
system
is
placed
under
ON
con
dition
When
the
valve
closes
silicone
oil
is
not
supplied
to
the
groove
oil
in
the
groove
is
accumulated
on
the
Tem
coupling
periphery
due
to
the
centrifu
1
Bi
metal
thermostat
2
Slide
valve
3
Reserve
chamber
fOl
OFF
4
Bearing
5
Coupling
part
labyrinth
6
Driven
part
C0130
Fig
CO
5
Tem
coupling
gal
force
and
led
into
the
reserve
chamber
Now
oil
is
eliminated
from
the
groove
and
the
system
is
placed
under
OFF
condition
With
this
system
when
fan
cooling
is
not
required
the
output
loss
IS
miniinized
and
noise
can
be
far
reduced
Q
i
tionalCOUPling
WATER
PUMP
SPEED
Q
ON
OFF
Tem
coupling
WATER
PUMP
SPEED
C0029
Fig
CO
6
Characteristic
of
Tern
coupling
I
SPECTION
Check
Tem
coupling
for
oil
leakage
or
bend
of
bimetaL
If
the
above
symptoms
are
found
replace
it
with
a
new
one
as
an
assembly
CO
4
THERMOSTAT
REMOVAL
AND
INSTALLATION
I
Drain
cool
nt
partiaUy
2
Disconnect
upper
radiator
hose
at
water
outlet
3
Disconnect
air
hose
for
air
injec
tion
systein
at
check
valve
Fxcept
FU
models
4
Loosen
belt
for
air
injechon
system
by
loosening
idler
pulley
se
curing
nut
and
adjusting
bolt
Except
FU
models
CD
@
ID
I
2
3
C0053
Idler
pulley
Nut
Water
outlet
Fig
CO
7
Disconnecting
Air
Hose
and
Loosening
Belt
Except
FU
models
5
Loosen
bolts
and
remove
idler
pulley
bracket
Except
FU
models
6
Disconnect
air
induction
pipe
FU
models
7
Remove
bolts
and
remove
water
outlet
gasket
and
thermostat
from
thermostat
housing
I
Thermostat
2
Air
check
valve
Except
FU
models
3
Water
outlet
Fig
CO
Removing
Thennostat
8
After
checking
thermostat
rein
stall
with
a
new
housing
gasket
in
place
9
Reinstall
water
outlet
Page 125 of 548
Emission
Control
System
CRANKCASE
EMISSION
CONTROL
SYSTEM
DESCRIPTION
This
system
returns
blow
by
gas
to
both
the
intake
manifold
and
carbure
tor
aitdeaner
The
positive
crankcase
ventilation
P
C
v
valve
is
provided
to
conduct
crankcase
blow
by
gas
to
the
intake
manifold
During
partial
throttle
operation
of
the
engine
the
intake
manifold
sucks
the
blow
by
gas
through
the
P
C
V
valve
Normally
the
capacity
of
the
valve
is
sufficient
to
handle
any
blow
by
and
a
small
amount
of
ventilating
air
L
J
J
o
I
Fresh
air
Blow
by
gas
The
ventilating
air
is
then
drawn
from
the
dust
side
of
the
carburetor
air
cleaner
through
the
tube
connect
ing
carburetor
air
cle
er
to
rocker
cover
into
the
crankcase
Under
full
throttle
condition
the
manifold
vacuum
is
insufficient
to
draw
the
blow
by
flow
through
the
valve
and
its
flow
goes
through
the
tube
connection
in
the
reverse
direc
tion
On
cars
with
an
excessively
high
blow
by
some
of
the
flow
will
go
through
the
tube
connection
to
car
buretor
air
cleaner
under
all
condi
tions
r
IiI
e
1
LJ
1
Seal
type
oil
level
gauge
2
DafOe
plate
3
Flame
arrester
4
Filter
5
P
C
V
valve
6
Steel
net
1
Baffle
plate
EC871
Fig
EC
5
Crankcase
Emis
ion
Control
Sy
tem
EC
6
INSPECTION
p
C
V
VALVE
AND
FILTER
With
ei
gine
runnirig
at
idle
remove
the
ventilator
hose
from
P
C
V
valve
if
the
valve
is
working
a
hissing
noise
wiD
be
heard
as
air
passes
through
the
valve
and
a
strong
vacuum
should
be
felt
irnniediately
when
a
fmger
is
placed
over
valve
inlet
EC139A
Fig
EC
6
Checking
PC
V
Vo
ve
VENTILATION
HOSE
I
Check
hoses
and
hose
connec
tions
for
ieaks
2
oisconn
ct
all
hoses
and
clean
with
compressed
air
If
any
hose
cannot
be
free
of
obstructions
replace
Ensure
that
flame
arrester
is
surly
inserted
in
hose
between
air
cleaner
and
rocker
rover
ET277
Fig
EC
7
Checking
Ventilation
Hose
Page 128 of 548
Remove
snap
ring
CD
and
lock
bolt
@
and
the
following
parts
can
be
detached
from
heat
control
valve
shaft
Key
ID
Counterweight
@
Thermostat
spring
@
Coil
spring
@
Note
As
previously
descnbed
heat
control
valve
j
is
welded
to
valve
shaft
@
at
exhaust
manifold
and
cannot
be
disassembled
To
install
reverse
the
removal
procedure
INSPECTION
1
With
engine
stopped
visually
check
the
quick
heat
manifold
system
for
the
following
items
I
Check
heat
control
valve
for
malfunction
due
to
break
of
key
that
locates
counterweight
to
valve
shaft
2
Rotate
heat
control
valve
shaft
with
fingers
and
check
for
binding
between
shaft
and
bushing
in
closing
and
opening
operation
of
heat
control
valve
If
any
binding
is
felt
in
rotating
operation
move
valve
shaft
in
the
rotation
direction
several
times
If
this
operation
does
not
correct
binding
condition
it
is
due
to
seizure
between
shaft
and
bushing
and
exhaust
mani
fold
should
be
replaced
as
an
assem
bly
Emission
Control
System
Counterweight
Heat
control
valve
Stopper
pin
EC249
Fig
EC
IO
Checking
Heat
Control
Valve
Movement
2
Run
engine
and
visually
check
counterweight
to
see
if
it
operates
properly
I
When
engine
speed
is
increased
discharge
pressure
of
exhaust
gases
causes
counterweight
to
move
down
ward
clockwise
2
For
some
time
after
starting
engine
in
cold
weather
counterweight
turns
counterclockwise
until
it
comes
into
contact
with
stopper
pin
installed
to
exhaust
manifold
EC
9
Counterweight
gradually
moves
down
clockwise
as
engine
warms
up
and
ambient
temperature
goes
higher
around
exhaust
manifold
If
it
does
not
move
at
all
check
and
replace
thermostat
spring
AIR
INJECTION
SYSTEM
A
I
S
DESCRIPTION
The
Air
Injection
System
A
I
S
is
adopted
on
U
S
A
models
except
FU
models
and
injects
compressed
air
secondary
air
coming
from
the
air
pump
into
the
exhaust
port
of
the
cylinder
head
to
reduce
hydrocarbons
He
and
carbon
monoxide
CO
in
exhaust
gas
through
recombustion
There
are
two
types
of
Air
Injection
System
Fresh
outside
air
is
drawn
by
the
air
pump
through
the
air
pump
air
cleaner
Compressed
air
is
injected
into
the
exhaust
manifold
through
the
check
valve
The
A
B
valve
supplies
air
from
the
carburetor
air
cleaner
to
the
intake
manifold
so
as
to
prevent
after
fire
during
deceleration
The
amount
of
injected
air
is
con
trolled
by
C
A
C
valve
California
models
or
air
relief
valve
Non
California
models
Page 144 of 548
INSPECTION
Entire
system
I
Make
a
thorough
vjsual
check
of
E
G
R
control
system
If
necessary
wipe
away
oil
to
facilitate
inspection
If
any
hoses
are
cracked
or
broken
replace
2
With
engine
stopped
inspect
E
G
R
control
valve
for
any
indication
of
binding
or
sticking
by
moving
dia
phragm
of
control
valve
upwards
with
a
finger
3
With
engine
running
inspect
E
G
R
control
valve
and
thermal
vacu
um
valve
for
normal
operation
1
When
engine
coolant
tempera
tun
is
low
Make
sure
that
E
G
R
control
valve
does
not
operate
when
engine
speed
is
increased
from
idling
to
3
000
to
3
500
rpm
Place
a
finger
on
the
diaphragm
of
E
G
R
control
valve
to
check
for
valve
operation
EC773
Fig
EC
73
Checking
E
G
R
Control
2
When
engine
coolant
tempera
tureishigh
Emission
Control
System
Make
sure
that
E
G
R
control
valve
operates
when
engine
speed
is
in
creased
from
idling
to
3
000
to
3
500
rpm
Place
fingers
on
the
diaphragm
of
E
G
R
control
valve
to
check
for
valve
operation
If
E
G
R
control
valve
does
not
operate
check
as
follows
Disconnect
one
end
E
G
R
control
valve
side
of
vacuum
hose
connect
ing
ihermal
vacuum
valve
to
E
G
R
control
valve
Increase
engine
speed
from
idling
to
3
000
to
3
500
rpm
Make
sure
that
thermal
vacuum
valve
is
open
2
port
type
or
closed
3
port
type
and
that
car
buretor
vacuum
is
present
at
the
end
E
G
R
control
valve
side
of
vacuum
hose
If
vacuum
is
weak
or
not
present
at
all
replace
thermal
vacuum
valve
If
vacuum
is
present
check
E
G
R
control
valve
or
B
P
T
valve
If
any
difficulty
is
encountered
in
judging
the
condition
of
any
com
ponent
during
above
inspection
check
the
questionable
component
in
dependently
as
follows
U
S
A
models
Ie
EC160A
Canada
models
ET429
Fig
EC
74
Checking
Vacuum
of
E
G
R
Control
Valve
EC
25
E
G
R
control
valve
Dismount
E
G
R
control
valve
from
engine
I
Apply
vacuum
to
E
G
R
control
valve
referring
to
the
following
figure
If
the
valve
moves
to
full
position
it
is
normal
E
G
R
control
valve
will
remain
open
for
more
than
30
seconds
after
vacuum
has
cut
off
5t
orr
rl
1
1
Fig
EC
75
EC129A
Checking
E
G
R
Control
Valve
2
Visually
check
E
G
R
control
wive
for
damage
wrinkle
or
deforma
tion
3
Clean
the
seating
surface
of
E
G
R
control
valve
with
a
brush
and
compressed
air
and
remove
foreign
matter
from
around
the
valve
and
port
Fig
EC
76
Cleoning
E
G
R
Control
Valve
Thermal
vacuum
valve
3
port
type
Remove
thermal
vacuum
valve
from
engine
Inhale
air
from
port
ofE
G
R
system
and
check
to
be
sure
that
thermal
vacuum
valve
opens
or
closes
in
response
to
its
temperature
Thermal
vacuum
valve
dosing
temperature
Above
50
to
630
C
122
to
1450
F