1994 BMW 318i timing chain tensioner

Fig
.
11
.
BMW
special
tool
no
.
11
2300
installed
through
bellhousin
and
finto
flywheel
(arrow)
tolockcrankshaft
at
TDC
.

Fig
.
12
.
BMW
special
tool
no
.
11
3
240
installed
on
rear
of
camshafts
tohold
them
at
TDC
.
(M44
engine
shown
.
Other
engínes
are

similar
.)

CAUTION-

The
camshafts
must
be
locked
in
the
TDC
position

using
the
special
service
tool,
or
equivalent,
be-

fore
removing
the
timing
chaín
.
The
tool
holds
the
camshafts
parallel
to
each
other
and
perpendicu-
larto
the
valve
covergasket
surface
.

CYLINDER
HEAD
REMOVAL
AND
INSTALLATION



113-5

6011966

28
.
Remove
hydraulic
chain
tensiones
from
right
side
ofcyl-

inder
head
.
See
Fig
.
13
.

Fig
.
13
.
Hydraulic
chain
tensioner
(arrow)
.

NOTE-

It
is
not
necessary
to
remove
the
cam
sprockets
from

the
chainuntessthese
parts
are
being
reptaced
.
tire
tie
each
sprocket
to
the
chain
to
keep
the
sprockets
timed
to
each
other
.
Keeping
the
sprockets
timed
will
símplífy
instaftation
.

uu
11999

Fig
.
14
.
Chainguide
and
guide
adjusting
sleeve
(arrow)
.
Allen-head
retaining
screwhasbeen
removed
.
Use
slotted
screwdriver
to
loosen
adjusting
sleeve
.

29
.
Remove
mounting
bolts
from
left
and
right
camshaft

sprockets
.
Then
remove
camshaft
sprockets
from
cam-



_



Cylinder
head
assembly,
removing

shafts
.
On
M44
engines,
note
orientation
of
sensor



31
.
Remove
crankshaft
locking
tool
(BMW
special
tool
no
.
wheel
.



11
2
300)
.
Usingthe
crankshaft
vibration
damper
bolt,

30
.
Remove
upper
bolt
from
left
chainguide
.
Loosen
chain



turn
engine
opposite
its
normal
direction
of
rotation

guide
adjusting
sleeve
approximately
two
turns
.
See



(counterclockwise
asviewed
from
the
front)
approxi

Fig
.
14
.



mately
45°
.
This
prevents
accidental
contact
between

valves
and
pistons
during
installation
.

CYLINDER
HEAD,
4-CYLINDER

Fig
.
23
.
When
reinstalling
chain
tensioner
on
M44
engine,
old
oil
in
tensioner
piston
mustbe
expelled
bycompressing
piston
in
vise
.
When
compressing
piston,
only
compress
up
to
end
cir-
clip
(arrow)
.

21
.
Turn
engine
overby
hand
in
direction
of
rotation
at
least

two
fui¡
rotations
.
Reinstall
camshaft
and
crankshaft

locking
tools
to
check
engíne
timing
.
Remove
locking

tools
if
no
faults
are
found
.

22
.
Insta¡¡
upper
timingchain
cover
.

"
Install
gaskets
and
instan
cover
using
two
mounting



Tightening
Torque

bolts
.
Using
a
screwdriver,
lever
down
on
front
cover



"
Cylinder
head
cover
until
cover
gasket
surface
is
flush
with
cylinder
head



to
cylinder
head
(M6
screws)
.......
10
Nm
(89
in-lb)

gasket
surface
.
See
Fig
.
24
.
Tighten
two
bolis
.

"
Insta¡¡
and
tighten
remainder
of
bolis
.

23
.
Install
cylinder
head
cover
.

CYLINDER
HEAD
REMOVAL
AND
INSTALLATION



113-
9

0012507

Fig
.
24
.
Install
upper
timing
case
cover
with
two
bolis,
then
press

down
on
cover
so
that
top
surface
is
flush
withcylinder
head
(arrow)
.
Hold
cover
in
position
and
tighten
bolis
.

"
Clean
old
gasket
glue
from
sealing
surfaces
.
Usea

small
amount
of
3-Bond
®
1209
adhesive
or
equivalent

at
corners
of
half-moon
cut-outs
at
back
of
cylinder

head
.
See
Fig
.
25
.

NOTE-

OnM44
engines,
reptace
sea¡
for
oil
supply
tube
.
See
Fig
.
17
.)

Fig
.
25
.
Rear
of
cylinder
head
cover
showing
area
where
sealant
(ar-
rows)
should
be
applied
.
Inset
shows
cylinder
head
cover
mounting
bolt
and
insulator
assembly
:
M6
screw
(1),
rubber
damper
(2),
washer
(3)
.

24
.
Installation
of
remaining
parts
is
reverseofremoval,

noting
the
following
:

"
Make
sure
al¡
sealing
surfaces
are
clean
and
free
of
old

gasket
material
.
Install
new
intake
manifold
gasket
.

"
On
M44
engine
:
Replace
seals
above
and
below

crankcase
ventvalve
.

"
When
installing
lower
intake
manifold,
make
sure
hol-

low
locating
bushings
are
on
two
lower
studs
.

"
Reinstall
harness
connectors
for
oil
pressure
switch

and
coolant
temperature
sensor
before
installing
in-

take
manifold
.
Tighten
manifold
nuts
in
stages
.

"
Refill
cooling
system
as
described
in
170
Radiator

and
Cooling
System
.

"
Change
engine
oil
and
filter
as
described
in
020
Main-

tenance
Program
.

"
If
necessary,
adjust
accelerator
cable
.

"
Run
engine
at
approx
.
3,500
rpm
for
about
20
seconds

to
allow
hydraulic
chain
tensioner
to
fill
with
oil
.

"
Reconnect
battery
last
.

CYLINDER
HEAD,-CYLINDER

Fig
.
33
.
Crankshaft
is
positioned
at
TDC
when
notch
oh
front
timing
chain
cover
is
alignedwith
0/T
mark
on
víbration
damper
.

CYLINDER
HEAD
REMOVAL
AND
INSTALLATION



113-
1
3

Fig
.
35
.
Camshaft
locking
tool
(BMW
special
tool
no
.
11
3
240)
in-
stalled
on
rear
of
camshafts
.
(M44
engine
shown
.
Other
en-
gines
are
similar
.)

CAUTION-

The
camshafts
must
be
locked
in
the
TDC
position
using
the
special
service
tool
before
removing
the
timing
chain
.
Thearrowson
the
sprockets
should
not
be
used
to
accurately
set
the
engine
to
TDC
.
The
tool
holds
the
camshafts
parallel
to
each
oth-
er
and
perpendicular
to
the
cylinder
head
covergasket
surface
.

27
.
Depress
secondary
timing
chain
tensioner
and
lock
t

down
by
inserting
BMW
special
tool
no
.
113
292
.
Alter-

natively,
a
stiff
piece
of
wire
can
be
used
.
See
Fig
.,36
.

Fig
.
34
.
Crankshaft
locking
tool
(BMW
special
tool
11
2
300)
inserted



Fig
.
36
.
Press
secondary
tensioner
down
fully
and
insert
wire
through
through
bellhousinghole
and
finto
flywheel
(arrow)
.



holes
(arrow)
to
lock
.
Timingchain
tensioner
varies
depend-
ing
on
engine
(M52
engine
tensioner
shown)
.

26
.
Lockcamshafts
at
TDC
.

"
Remove
three
cylinder
head
cover
mounting
studs



28
.
Remove
mounting
nuts
from
front
of
intake
camshaft

from
across
rear
of
head,
if
applicable
.



sprocket
.
Remove
camshaft
sprocket,
thrust
washer(s),

"
Mount
BMW
special
tool
no
.
11
3
240
over
square



and
where
applicable,
spring
plate
.

ends
of
camshafts
.
Check
that
tool
is
squarely
seated

on
cylinder
head
gasket
surface
.
If
necessary,
rotate



NOTE-

camshafts
slightly
using
a
24
mm
wrench
at
hexon



Where
applicable,
make
note
of
thrust
washer
positions
.

camshaft(s)
.
See
Fig
.
35
.



The
thicker
(0
.4
mm)
washer
is
mounted
outermost
.

CYLINDER
HEAD,6-CYLINDER

113-14



CYLINDER
HEAD
REMOVAL
AND
INSTALLATION
29
.
Remove
mounting
nuts
from
front
of
exhaustcamshaft

sprocket
.
Remove
secondary
sprockets
together
with

timing
chain
from
front
of
camshafts
.

CAUTION-

The
crankshaft
must
not
be
allowed
to
rotate
once
the
camshaft
timing
chain
is
removed
.
The
pistons
can
contact
thevalves
.

NOTE-

Do
not
remove
the
sprockets
from
the
chain
unless
these
parts
are
being
replaced
.
Wire
tie
each
sprocket
to
the
chain
to
keep
the
sprockets
timed
to
each
other
.

30
.
Unbolt
secondary
timing
chain
tensioner
from
top
of

cylinder
head
.

31
.
Remove
primary
timing
chaintensioner
from
side
of

cylinder
head
.
See
Fig
.
37
.

Fig
.
37
.
Primary
timing
chain
tensioner
(arrow)
.

WARNING
-

Remove
tensioner
slowly-¡t
ís
under
spring
pres-
sure
.

32
.
Remove
timing
chainguíde
(Tono
E8
socket)
.
See
Fig
.
38
.

33
.
Lift
primary
chain
sprocket
off
exhaust
camshaft
.
Re-
move
sprocket
from
chain
.
Suspend
chainusing
stiff
wire
.

Cylinder
head
assembly,
removing

34
.
Remove
two
mounting
bolts
holding
cylinder
head
to
lower
timing
chaincover
(Torx
E8
socket)
.
See
Fig
.
39
.

CYLINDER
HEAD,
6-CYLINDER

Fig
.
38
.
Timing
chain
guide
mounting
bolts
(arrows)
.
M50
engine
shown
.

Fig
.
39
.
Cylinder
head-to-timing
chain
covermounting
boits(arrows)
.
(Bolt
A
also
retains
secondary
chain
tensioner
.)

35
.
Using
BMMI
special
tool
no
.
11
2
250
or
an
equivalent

tool,
loosen
cylinder
head
bolts
in
several
stages
.
See
Fig
.
40
.
Discard
head
boits
.

CAUTION-

Torx-type
cylinder
head
bolts
should
not
be
re-
used
.
Theyare
stretch-type
bolts
and
must
atwaysbe
replaced
whenever
loosened
.

Fig
.
44
.
Secondary
chain
sprockets
and
chain
being
installed
.
Attachsprockets
with
arrows
pointing
upand
elongated
holes
cen-
tered
.

CYLINDER
HEAD
REMOVAL
AND
INSTALLATION



113-17

Spring
17
plate
0012543

Fig
.
45
.
VANOS
spring
plate
and
thrust
washerson
later
engines
.

14
.
Insta¡¡
BMW
special
tool
no
.
11
3
390
into
primary
tim-
ing
chain
tensioner
sleeve
.
Thread
tool
in
finger
tight
until
siack
is
removed
from
chain
.

NOTE-

BMW
special
tool
no
.
11
3
390
is
a
dummy
primary
chain
tensioner
and
simulatesthe
function
of
the
ten-
sioner
.

15
.
Insta¡¡
VANOS
unit
as
described
in
117
Camshaft
Tim-

ing
Chain
.

CAUTION-

Special
ínstallation
instructions
apply
when
mounting
the
VANOS
unit
to
the
cylinder
head
.
Be
sure
to
follow
the
procedurefound
in
117
Cam-
shaft
Timing
Chain
.

16
.
Slowlyuniock
and
release
secondary
chain
tensioner
.

17
.
Preloadprimary
chain
by
tightening
BMW
special
tool

no
.
11
3390
(dummy
chain
tensioner)
to
1.3
Nm
(11
in-

lb)
.
Then
tighten
exhaust
secondary
camshaft
sprocket

mounting
bolts
in
two
stages
.

Tightening
Torque

"
Secondary
timing
chain
sprocket
to
exhaust
camshaft

(Torx
bolts)

Stage
1
.
.............
..
..
.
...



5
Nm
(44
in-lb)

Stage
2
..............
..
..
.



,
.
..
22
Nm
(17
ft-1b)

18
.
Remove
flywheel
locking
tool
from
transmission
bell-

housing
.
Remove
camshaft
locking
tool
from
rear
of

cylinder
head
.

19
.
Turn
engine
over
by
hand
at
least
two
fui¡
crankshaft
ro-

tations
.
Reinstall
camshaft
locking
tool
and
flywheel

locking
toolto
make
sure
al¡
adjustments
are
still
cor-
rect
.
lf
settings
are
correct,
remove
locking
tools
.

20
.
Remove
BMW
special
tool
11
3390
(dummy
chain
ten-

sioner)
from
side
of
cylinder
head
.

CAUTION-

Mountintake
camshaft
sprocket
so
thatcollar
side



21
.
Insta¡¡
primary
chain
tensioner
so
that
cutout
in
tension-

of
the
sprocket
faces
camshaft
.



er
piston
engages
chain
rail
.
See
Fig
.
46
.
Using'new

seals,
install
and
tighten
access
plugs
in
VANOS
con

13
.
Install
and
tighten
exhaust
camshaft
sprocket
mounting



trol
unit
.

boits
finger
tight
only
.
Tighten
intake
camshaft
sprocket

mounting
nuts
to
specified
torque
.
Tightening
Torques

"
Access
plugs

Tightening
Torque



to
VANOS
control
unit
.
..
.
.
........
50
Nm
(37
ft-Ib)

"
Intake
camshaft
sprocket



"
Primary
camshaft
timing
chain
tensioner

mounting
nuts
(M6)
..............
10
Nm
(89
in-lb)



to
tensioner
sleeve
..
...
.
.
........
50
Nm
(37
ft-Ib)

CYLINDER
HEAD,
6-CYLINDER

Camshaft
installation
waíting
times

"
Ator
above
68°F
(20°C)
............
.
..
10
minutes

"
50-68°F
(10-20°C)
................
..
.
30
minutes

"
32-50°F
(0-10°C)
.
.......
.
.........
..
.
75minutes
"
Reinstall
timing
chain
sprockets
and
tensioner
as
spe-

cifically
described
in
117
Camshaft
Timing
Chain
.



i

"
Wait
at
least
10minutes
before
cranking
engine
over

with
starter
motor
for
the
fi+



1
1/
/~~
.0
time
.

Tightening
Torques

"
Camshaft
bearing
caps

to
cylinder
head
(M7)
.............
15
Nm
(11
ft-Ib)

"
Cylinder
head
cover

to
cylinder
head
(M6)
.............
10
Nm
(89
in-lb)

"
Primary
timing
chain
tensioner
plug

to
cylinder
head
..
..
..
...........
40
Nm
(30
ft-Ib)

(see
117
Camshaft
Timing
Chain)

"
Spark
plugs
(M12)
..
.
.............
23
Nm
(17
ft-Ib

"
Timing
chain
cover
(upper)

to
cylinder
head
..
.
.
...
..........
10
Nm
(89
in-lb)

"
Timing
chainsprockets
to
camshaft

M6
........
.
...
.
..
.



..........
10
Nm
(7.5
ft-Ib)

M7



............
.
..
..
...........
15
Nm
(11
ft
.lb)

(see
117
Camshaft
Timing
Chain)

Camshafts,
removing
and
installing

(M44
engine)

Special
BMW
service
tools
should
always
be
used
to
remove

and
install
the
camshafts
.
Removal
and
installation
of
the
cam-

shafts
without
the
special
tools
can
result
in
camshaft
and
val-

vetrain
damage
.

1.
Disconnect
negative
(-)
battery
cable
.

CAUTION-

Prior
to
disconnecting
the
battery,
read
the
battery
disconnection
cautions
given
at
the
front
of
this

manual
on
page
vi¡¡
.

CYLINDER
HEAD
AND
VALVETRAIN



116-
3

2
.
Remove
spark
plugs
.
See
1201gnition
System
.

3
.
Rotateengine
until
a
pair
of
camshaft
lobes
are
point-
ing
up
.
Using
BMW
special
tool
115
130,
depresseach
valve
and
valve
spring
enough
to
remove
rocker
arms
.

Rotate
engine
for
the
next
pair
of
rocker
arms
.
See
Fig
.

3
.

cover
.

Fig
.
3
.



BMW
special
tool
no
.
11
5130
(arrow)
being
used
to
depress
valve
stem
to
remove
rocker
arm
.

WARNING
-

Removed
rocker
arms
must
be
reinstalled
in
the
same
locations
.

4
.
Remove
primary
timing
chain
tensioner
from
right
side

of
cylinder
head
.

The
camshafts
can
be
removed
with
the
cylinder
head



5
.
Remove
upper
timing
chaincover
.

mounted
onthe
engine
.
The
first
step
is
to
remove
the
cylinder

head
cover
.
See
113
Cylinder
HeadRemoval
and
Installa-



NOTE-

tion
.



lt
is
not
necessary
to
remove
the
lower
timing
chain

6
.
Remove
timing
chain
sprockets
with
timing
chains
from

front
of
camshafts
.
See
117
Camshaft
Timing
Chain
.

Remove
upper
timing
chain
guide
from
cylinder
head
.

WARNING-



7
.
Remove
camshaft
bearing
caes
and
remove
cam
The
process
of
evenly
loosening
the
camshaft
bear-



shafts
.
ing
cap
nuts
is
NOT
an
acceptable
method
of
re-

moving
the
camshafts
.
Be
sure
to
read
the



CAUTION-
procedure
through
before
starting
the
job
.
Camshaft
bearing
capsmust
be
reinstalled
intheir

original
locations
.

CYLINDER
HEAD,
DISASSEMBLYAND
ASSEMBLY

116-
4



CYLINDER
HEAD
AND
VALVETRAIN

NOTE-

"
The
camshaft
bearing
caps
are
coded
with
a
letter
anda
number
.
Forexample,
'541"is
the
exhaustcam-
shaft
bearing
cap
at
the
front
of
the
engine,
and
`El"
is
the
intake
camshaft
bearing
cap
at
the
front
of
the
engine
.

"
Camshafts
are
stamped
with
a
code
letter-'E"
for
the
intakeside
and
A"
for
the
exhaust
side
.

"
"E"
isfor
Einla3,
(German
for
intake)
and
A"
is
for
Auspuff,
(Germen
for
exhaust)
.

"
The
front
of
the
engine
is
at
the
front
of
the
car
.

8
.
Camshaft
installation
is
reverse
of
removal,
noting
the

following
:

"
Prior
to
installation,
check
all
components
for
wear
as

described
below
underCylinder
Head
and
Val-

vetrain
Reconditioning
.
"
Lubricate
camshafts
prior
to
installation
.
"
Reinstall
timing
chain
sprockets
and
tensioner
and
set
valve
timing
before
reinstalling
rocker
arms,as
spe-

cifically
described
in
117
Camshaft
Timing
Chain
.

"
Be
sure
corresponding
camshaft
lobe
is
pointing
up

before
installing
rocker
arms
.
Note
that
each
rocker
arm
angles
away
from
corresponding
spark
plug
hole
.
See
Fig
.
4
.

"
Wait
at
least
10
minutes
for
hydraulic
cam
followers
to
fully
compress
before
cranking
engine
over
with
start-

er
for
the
first
time
.

Tightening
Torques

"
Camshaft
bearing
caps

to
cylinder
head
(M7)
.............
15
Nm
(11
ft-Ib)

"
Cylinder
head
cover

to
cylinder
head
(M6)
.............
10
Nm
(89
in-lb)

"
Primary
timing
chain
tensioner
plug

to
cylinder
head
.
................
40
Nm
(30
ft-lb)
(sea
117
Camshaft
Timing
Chain)

"
Spark
plugs
(M12)
.............
...
23
Nm
(17
ft-lb

Timing
chaincover
(upper)
to
cylinder
head
M6
.....
.
.
...
................
.
10
Nm
(7
.5
ft-Ib)
M7
....
..
.
.
........
.
.....
.
...
.
15
Nm
(11
ft-Ib)

"
Timing
chain
sprockets
to
camshaft

M6
....
.
.
..
..............
.
..
..
10
Nm
(7
.5
ft-Ib)
M7
....
....
..............
.
..
..
.15
Nm
(11
ft
.lb)
(sea
117
Camshaft
Timing
Chain)

Camshafts,
removing
and
installing

(6-cylinder
engine)

Camshafts
on
6-cylinder
engines
can
be
removed
with
the
cylinder
head
mounted
on
the
engine
.
The
first
step
is
to
re-
move
the
cylinder
head
cover
.
See
113
Cylinder
Head
Re-
moval
and
Installation
.

CYLINDER
HEAD,
DISASSEMBLYAND
ASSEMBLY

Fig
.
4
.



Correct
installation
position
ofrocker
arms
(arrows)
on
M44
engine
.

Special
BMW
service
tools
should
always
be
used
to
re-

move
and
instan
the
camshafts
.
Removal
of
camshafts
with-

outthe
special
tools
can
result
in
personal
injury
and/or
cylinder
head
damage
.

WARNING
-

The
processof
evenly
loosening
the
camshaft
bear-
ing
cap
nuts
is
NOT
en
acceptable
method
of
re-
moving
the
camshafts
.
Special
tools
shouldalways
be
used
lo
remove
the
camshafts
.
Be
sure
to
read
the
procedure
through
before
starting
ajob
.

1
.
Disconnect
negative
(-)
battery
cable
.

CAUTION-

Prior
to
disconnectiog
the
battery,
read
the
battery
disconnection
cautions
given
at
the
front
of
this
manual
onpaga
viii
.

516
2
.
Setengine
to
TDC
and
lock
into
position
by
installing
BMW
special
tool
11
2
300
through
transmission
bell-
housing
and
into
hole
in
flywheel
or
drive
platea
See
Fig
.
5
.

NOTE-

Arrows
on
camshaft
sprockets
shouldbe
pointing
up
.
Sea
117
Camshaft
Timing
Chain
.

3
.
Remove
VANOS
control
unit
from
cylinder
head
.
Re-
move
timing
chainsprockets
from
camshafts
.
See117

Camshaft
Timing
Chain
.

4
.
Remove
sparkplugs
and
insta¡¡
BMW
special
tool
11
3
260/11
3
270
to
cylinder
head
.
Tighten
tool
retaining
bolts
in
spark
plug
holes
.
Do
not
ovar-tighten
bolts
.
See
Fig
.
6
.

116-
6



CYLINDER
HEAD
AND
VALVETRAIN

9
.
Camshaft
installation
is
reverse
of
removal,noting
the

following
:

"
Prior
to
installation,
check
al¡
components
for
wear
as
described
below
under
Cylinder
Head
and
Val-

vetrain
Reconditioning
.

"
Crankshaft
must
be
at
least
45°
away
from
MC
before

installing
camshafts
to
cylinder
head
.

"
Lubricate
camshafts
prior
to
installation
.
"
Insta¡¡
camshafts
into
cylinder
head
with
lobes
for
cyl-
inder
no
.
1
pointing
up
and
towards
each
other
.
See
Fig
.
8
.

"
After
installing
camshaft(s),
observe
specified
waiting

time
for
hydraulic
cam
followers
to
fully
compress
be-

fore
bringing
crankshaft
back
to
TDC
.

Fig
.
8
.



Camshaft
correctly
positioned
for
reassembly
so
thatcylinder
no
.
1
lobes
(arrows)
face
each
other
.

Tightening
Torques

"
Camshaft
bearing
caps
to
cylinder
head
(M7)
.
..
...
..
.
....
15
Nm
(11
ft-Ib)
"
Cylinder
head
cover
to
cylinder
head
(M6)
..
.
..........
10
Nm
(89
in-lb)

"
Primary
timing
chaintensioner
to
cylinder
head-see
117
Camshaft
Timing
Chain
"
Spark
plugs
(M12)
.............
.
.
23
Nm
(17
ft-Ib)

"
Timing
chain
sprocket
to
camshaft
flange
(M6)-see
117
Camshaft
Timing
Chain

CYLINDER
HEAD,
DISASSEMBLYAND
ASSEMBLY

Valves,
removing
and
installing

1
.
Remove
cylinder
head
as
described
in
113
Cylinder

HeadRemoval
and
Installation
.
Remove
exhaust

manifold(s)
.

2
.
Remove
camshafts
using
special
tools
as
descríbed

earlier
.

3
.
On
M42
and
al¡
6-cylinder
engines
:
Remove
camshaft

carriers
by
pulling
them
straight
up
off
mounting
studs
.

CAUTION-

"
Do
not
let
the
hydraulic
cam
followers
fa¡¡
out
as
the
camshaft
carrier
is
removed
.
Special
suction
cupsare
available
from
BMW
to
hold
the
hydrau-
lic
cam
followers
in
place
during
carrier
removal
.
Camshaft
installation
waiting
times

"
at
or
above
68°F
(20
0
C)
....
..
.
..
......
10
minutes

"
50-68°F
(10-20°C)
...
.
..
....
.
..
......
30
minutes

"
32-50°F
(0-10°C)
....
.
..
....
.
..
......
75
minutes
4
.
On
M44
engines
:
Remove
all
hydraulic
valve
adjusters
.
See
Hydraulicvalve
adjusters,
checking
and
re-
"
Reinstall
timing
chainsprockets
and
tensioner
as
spe-



placing
(M44
engine),
later
in
this
section
.
cifically
described
in
117
Camshaft
Timing
Chain
.
"
Waít
at
least
10
minutes
before
cranking
engine
over



CAUTION-
withstarter
motor
for
the
first
time
.



Hydraulic
valve
adjusters
should
be
stored
in
an
upright
position
.
lf
necessary,
use
amagnetic
tool
to
aid
in
removal
of
the
adjusters
.

"
Hydraulic
cam
followers
shouldbe
stored
in
an
upright
position
.

5
.
Remove
valves
using
a
valve
spring
compressor
.

NOTE-

"
The
M44
cylinder
head
has
recessed
valve
stems
.
This
requires
the
use
of
a
special
valve
spring
com-
pressor
tool
.

"
Label
each
valve
assembly
as
it
is
removed
so
it
can
be
installed
in
its
original
position
.

6
.
Remove
and
discard
valve
stem
oil
seals
from
valve
guides
.
See
Valve
stem
oil
seals
later
in
this
section
.

7
.
Valve
installation
is
reverse
of
removal
.

"
Reinstall
exhaust
manifold(s)
with
new
gaskets
.
Use
Molycote
HSC'
5
or
equivalent
anti-seize
thread
com-
pound
on
fasteners
.

Tightening
Torque

"
Exhaust
manifold
to
cylinder
head
M7
............
..
...
....
.
...
..
20
Nm
(15
ft-Ib)