transmission BMW 318i 1997 E36 Owner's Manual
[x] Cancel search | Manufacturer: BMW, Model Year: 1997, Model line: 318i, Model: BMW 318i 1997 E36Pages: 759
Page 88 of 759
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
.
Page 99 of 759
NOTE-
The
vibration
damper
center
bolt
is
very
tight
.
A
heavy
duty
holding
device,
such
as
BMW
special
tool
no
.
112
150,
should
be
used
to
hold
the
vibration
damper
hub
V
stationary
while
the
bolt
is
loosened
.
v
11
.
Usingloosened
bolt
at
vibration
damper,
turn
crank-
shaft
to
TDC
and
lock
in
position
by
inserting
BMW
special
tool
no
.
11
2
300
through
transmission
bell-
-
p
housing
.
See
Fig
.
5
.
v
O
NOTE-
I\
0011966a
"
If
necessary,
remove
plugfrom
locating
boye
in
lower
edge
of
bell
housing
.
"
Confirm
that
locatng
tool
has
been
correctlyinstalled
by
trying
to
rotate
the
crankshaft
.
Fig
.
7
.
Lower
timing
chain
cover
mounting
bolts
(arrows)
.
Bolts
A
Fig
.
5
.
BMW
special
tool
no
.
11
2300
installed
through
bellhousing
are
installed
through
hollow
locating
dowels
.
and
finto
flywheel
to
lock
crankshaft
at
TDC
(arrow)
.
CA
UTION-
Thecamshafts
mustbe
locked
in
the
MC
position
using
the
specialservice
tool
before
removing
the
timing
chain
.
The
tool
holds
the
camshafts
parallel
to
each
other
and
perpendicular
to
the
valve
cover
gasket
surface
.
12
.
Lockcamshafts
at
TDC
bymounting
BMW
special
tool
no
.
113
240
over
square
ends
of
camshafts
.
See
Fig
.
6
.
"
Check
that
tool
is
squarely
seated
on
cylinder
head
gasket
surface
.
If
necessary,
rotate
camshafts
slightly
using
an
open-end
wrench
at
hexon
camshafts
.
13
.
Remove
lower
timing
chaincover
mounting
bolts
and
carefully
lift
cover
off
.
Clean
sealing
surfaces
and
gas-
ket
grooves
.
See
Fig
.
7
.
14
.
Remove
hydraulic
chaintensioner
from
right
side
of
cyl-
inder
head
.
See
Fig
.
8
.
CAMSHAFT
TIMING
CHAIN
117-
3
Fig
.
6
.
BMW
special
tool
no
.
11
3240
installed
on
rearof
camshafts
to
position
camshafts
at
TDC
.
(M44
camshafts
shown
.
Other
engines
are
similar
.
Fig
.
8
.
Hydraulic
chain
tensionerplug
(arrow)
.
CAMSHAFT
TIMING
CHAIN,
4-CYLINDER
Page 102 of 759
117-
6
CAMSHAFT
TIMING
CHAIN
15
.
Insta¡¡
upper
timing
chaincover
:
17
.
Remove
crankshaft
locking
tool
from
transmission
bell-
"
Thoroughly
clean
profile
gasketgroove
and
all
sealing
housing
and
camshaft
locking
tool
from
rear
of
cylinder
surfaces
.
head
.
"
Applya
small
bead
ofsilicon
sealer
(3-Bond
1209®
or
equivalent)
to
upper
and
lower
joint
comers
where
18
.
Turn
engine
over
by
hand
in
direction
of
rotation
at
least
chaincover
meets
cylinder
head
.
two
full
rotations
.
Reinstall
camshaft
and
crankshaft
"
Insta¡¡
new
profile
gasket
to
groove
in
lowerchain
cover
.
locking
tools
to
check
engine
timing
.
Repeat
cam
timing
"
Protect
top
of
profile
gasket
using
thin
sheetmetal
procedure
if
tools
do
not
fit
easily
into
position
.
Remove
(BMW
special
tool
no
.
11
2
330
or
equivalent)
.
See
locking
tools
.
Fig
.
15
.
"
Attach
new
gaskets
to
cover
with
light
dabs
of
gasket
19
.
Install
cylinder
head
cover
as
described
in
113
Cylin-
sealant,
hold
gaskets
in
placeusing
cover
mounting
der
HeadRemoval
and
Installation
.
screws
.
"
Place
upper
timing
cover
into
position
.
Snug
down
al¡
NOTE-
screws,
without
tightening
.
Carefully
slide
out
sheet
OnM44
engines,
note
oil
supply
O-ring
and
replace
ff
metal
.
necessary
.
"
Temporarily
install
cylinder
head
cover
without
gasket
.
Insta¡¡
and
tighten
at
least
two
cylinder
head
cover
mounting
bolts
to
seat
upper
timing
chaincover
.
"
Tighten
all
upper
timing
cover
screws
.
Tightening
Torque
"
Remove
valve
cover
.
"
Cylinder
head
cover
to
cylinder
head
(M6
screws)
...
..
.
.
10
Nm
(89
ín-Ib)
-
CAMSHAFT
TIMING
CHAINS,
Fig
.
15
.
When
installing
upper
timing
chain
cover,
use
thin
sheetmetal
6-CYLINDER
(arrow)
to
protect
profile
gasket
when
installing
uppercover
.
Tightening
Torque
"
Upper
timing
chaincover
to
engine
block
or
cylinder
head
(M6
screws)
....
.
..
10
Nm
(89
in-lb)
16
.
Install
vibration
damper
while
aligning
woodruff
key
.
Hold
crankshaft
stationary
and
tighten
mounting
bolt
.
Tightening
Torques
I
CAUTION-
"
Pulley
to
vibration
damper
..
.
.
.
....
22
Nm
(17
ft-Ib)
lf
the
camshaftsare
not
properly
timed,
the
1
pis-
tons
can
contact
thevalves
.
"
Vibration
damper
tocrankshaft
M16
stretch
bolt
(always
replace)
.
330
Nm
(244
ft-Ib)
CAMSHAFT
TIMINGCHAINS,
6-CYLINDER
20
.
Installation
of
remaining
parts
is
reverse
of
removal
.
When
installing
thermostat,
make
sure
arrow
or
vent
hole
faces
up
.
Refill
cooling
system
as
described
in
170
Radiator
and
Cooling
System
.
Tighteníng
Torques
"
Coolant
drain
plug
to
cylinder
block
.
..
.
.
.
...
.
..
.....
25
Nm
(18
ft-Ib)
"
Radiator
cooling
fan
to
coolant
pump
.
..
.
...
...
..
.....
40
Nm
(30
ft-Ib)
"
Radiator
drain
screw
to
radiator
....
2
.5
Nm
(22
in-lb)
Camshaft
timing
chainremovalon
6-cylinder
engines
re-
quires
that
you
Rmove
the
engine
oil
pan
by
raising
the
en-
gine
and/or
lowering
the
front
suspension
crossmember
.
Special
BMW
service
tools
are
needed
for
timing
chain
re-
moval
and
installation
procedures
.
The
special
tools
assure
proper
timing
of
the
valvetrain
.
Precise
marks
to
setthe
timing
on
the
camshafts
arenot
provided
for
reassembly
.
Read
the
procedures
through
before
beginning
thejob
.
Page 104 of 759
117-
8
CAMSHAFT
TIMING
CHAIN
Fig
.
18
.
Oil
baffle'
cover
being
removed
.
Fig
.
19
.
Upper
timing
chaincover
mounting
nuts
(arrows)
on
pre-
VANOS
engines
.
16
.
Secure
crankshaft
hub
to
prevent
crankshaft
from
turn-
ing
.
Using
a
socket,
loosen
but
do
not
remove
crank-
shaft
hub
center
bolt
.
CAMSHAFT
TIMINGCHAINS,
6-CYLINDER
Fig
.
20
.
Engine
set
to
approximate
TDC
.
Camshaft
lobes
face
in
and
arrows
on
sprockets
point
up
(arrows)
.
B1
1123a
Fig
.
21
.
O/
T
(0°TDC)
mark
on
vibration
damper
aligned
with
boss
on
timing
chain
cover
(arrow)
.
17
.
Lock
crankshaft
in
TDC
position
by
inserting
BMW
spe-
cial
tool
no
.
11
2
300
through
transmissionbellhousing
and
into
hole
in
flywheelor
drive
plate
.
See
Fig
.
23
.
NOTE-
Confirm
that
the
locking
tool
has
been
correctly
in-
stalled
by
trying
to
rotate
the
crankshaft
.
NOTE-
The
crankshaft
hub
center
bolt
is
tightened
to
a
torque
18
.
Remove
crankshaft
hub
bolt
and
washer
.
Remove
hub
of
410
Nm
(300
ft-ib)
.
A
heavy
duty
holding
device,
from
crankshaft
.
suchas
BMW
special
tool
no
.
112150,
should
be
used
to
hold
the
crankshaft
hub
stationary
while
the
bolt
is
19
.
Remove
cylinder
head
cover
mounting
studs
at
rear
of
loosened
.
Use
a
heavy
duty
314-inch
drive
socket
and
head
.
Lock
camshafts
at
TDC
using
BMW
special
tool
breaker
bar
to
break
the
bolt
free
.
no
.
11
3
240
at
ends
of
camshafts
.
See
Fig
.
24
.
.
Page 109 of 759
Fig
.
34
.
Primary
timíng
chain
tensioner
being
instafed
.
Pistoncutout
mustbe
in
position
shown
to
engage
chain
rail
.
12
.
On
1993
and
later
engines
:
Install
VANOS
control
unit
as
described
later
in
this
repair
group
.
13
.
Unlock
and
release
secondary
chaintensioner
.
NOTE-
On
pre-VANOS
engines,
be
sure
toinstall
the
3mm
drill
bits
on
left
and
right
sides
of
tool
.
14
.
On
1992
engines
:
Tighten
intake
and
exhaust
timing
chain
sprocket
bolts
alternately
in
two
stages,
working
at
intake
side
first
.
Tightening
Torques
"
Secondary
timing
chaira
sprockets
to
camshafts
(M7
Torx
bolts)
Stage
1
....
.
.
.
...
...............
5
Nm
(44
in-lb)
Stage
2
..
.
.
.
.
.
.
................
22
Nm
(17
ft-Ib)
15
.
On
1992
engines
:
Install
upper
timing
chaincover
to
cylinder
head
using
a
new
gasket
.
Apply
a
small
amount
ofliquid
gasket
sealer
(3-Bond
1209
®
orequiv-
alent)
around
coveralignment
dowels
.
16
.
On
1993
and
later
engines
:
Preloadprimary
chain
by
tightening
BMW
special
tool
no
.
11
3
390
(dummy
21
.
Install
cylinder
head
cover
mounting
studs
.
Insta¡¡
oil
chain
tensioner)
to
1
.3
Nm
(11
in-lb)
.
Then
tighten
ex-
baffle
cover
.
Install
cylinder
head
cover
.
haust
camshaft
sprocket
bolts
alternately
in
twostages
.
Tightening
Torques
(1993
and
later
engines)
"
Exhaust
camshaft
sprockets
to
camshafts
(M7
Torx
bolts)
Stage
1
..
...
..
..
................
5
Nm
(44
in-lb)
Stage
2
.....
.
.
...
..............
22
Nm
(17
ft-Ib)
17
.
Remove
flywheel
locking
tool
from
transmission
bell-
housing
.
Remove
camshaft
locking
tool
from
rear
of
cylinder
head
.
CAMSHAFT'TIMING
CHAIN
117-
1
3
18
.
Insta¡¡
crankshaft
hubandwasher
while
aligning
woo-
druff
key
.
Hold
hub
stationary
and
tighten
mounting
bolt
.
Install
vibration
damper
and
pulley,
making
sure
that
lo-
cating
pin
in
hub
engages
hole
in
vibration
damper
.
NOTE-
When
installing
crankshaft
hub
mounting
bolt,
the
stepped
(shouldered)
sideof
the
washer
should
fase
the
hub
.
Tightening
Torques
Crankshaft
hub
to
crankshaft
(stretch
bolt-
always
replace)
........
410
±
20
Nm
(300
±
15
ft-1b)
"
Vibration
damper
and
pulley
to
crankshaft
hub
(M8)
...
..
.
..
....
22
Nm
(17
ft-Ib)
19
.
Turn
engine
over
by
hand
in
direction
of
rotation
atleast
two
full
rotations
.
Reinstall
camshaft
and
crankshaft
locking
tools
to
check
engine
timing
.
Remove
locking
tools
if
no
faults
are
found
.
20
.
On
1993
and
later
engines
:
Remove
BMW
special
tool11
3
390
(dummy
tensioner)
.
Install
primary
chain
ten-sioner
so
that
cutout
in
tensioner
piston
engages
the
chain
rail
.
See
Fig
.
34
.
Install
and
tighten
access
plugs
in
VANOS
control
unit
.
Tightening
Torques
"
Access
plugs
to
VANOS
control
unit
..........
.
..
50
Nm
(37
ft-Ib)
"
Primary
timing
chain
tensioner
to
tensioner
sleeve
M50/S50US
engine
.......
.
..
..
.
.
50
Nm
(37
ft-Ib)
M52/S52US
engine
..........
..
.
.
40
Nm
(30
ft-Ib)
Tightening
Torque
"
Cylinder
head
cover
to
cylinder
head
............
...
.
.10
Nm
(89
in-lb)
CAMSHAFT
TIMINGCHAINS,
6-CYLINDER
Page 110 of 759
117-
1
4
CAMSHAFT
TIMING
CHAIN
22
.
Installation
of
remaining
parts
is
reverse
of
removal,
When
theengine
is
running,
the
piston
housing
is
supplied
noting
the
following
:
with
pressurized
engine
oil
.
At
idie,
the
solenoid
isin
the
off
"
When
installing
thermostat,
make
sure
arrow
or
vent
position
(de-energized)
and
valve
timing
is
maintained
in
the
hole
faces
up,
if
applicable
.
normal
position
:
When
the
solenoid
is
energized,
the
gear
cup
"
Refill
cooling
systemas
described
in
170
Radiator
piston
moves
forward
to
advance
the
camshaftby
a
maximum
and
Coming
System
.
of
12
.5
.
"
Install
oil
pan
as
described
in
119
Lubrication
Sys-
tem
.
"
Fill
engine
with
oil
and
install
a
new
oil
filter
as
de-
scribed
in
020
Maintenance
Program
.
"
Insta¡¡
ground
wires
at
cylinder
head
cover
mounting
studs
and
at
front
of
cylinder
head
and
thermostat
housing,
where
applicable
.
VANOS
system
operation,
testing
Tightening
Torques
There
are3
special
tools
required
to
check
VANOS
opera-
"
Coolant
drain
plugto
cylinder
block
.
.
25
Nm
(18
ft-Ib)
tion
;
an
electricaltest
lead
(BMW
special
tool
no
.
12
6
410),
an
"
Radiator
cooling
fan
to
coolant
pump
.
40
Nm
(30
ft-Ib)
air
line
fitting
(BMW
special
tool
no
.
11
3
450),
and
a
crank-
"
Radiator
drain
screw
to
radiator
...
.
2
.5
Nm
(22
in-Ib)
shaft
TDC
locking
tool
(BMW
special
tool
no
.
112
300)
.
"
Upper
timing
chaincover
to
cylinder
head
The
test
leal
is
used
to
power
the
solenoid,
simulating
the
M6
nut
...
.....
.............
..
.
10
Nm
(89
in-lb)
ground
signal
from
the
DME
control
unit
.
The
air
line
fitting
M8
bolt
.....
....
.
.
.............
22
Nm
(17
ft-Ib)
takes
the
place
of
the
oil
supply
line
fitting
to
simulate
oil
Ares-
"
VANOS
control
unit
to
cylinder
head
sure
.
The
locking
tool
positions
and
locks
the
crankshaft
at
M6
nut
.........
..
..
.
..........
10
Nm
(89
in-lb)
TDC,
cylinder
no
.
l.
M8
bolt
........
...
.............
22
Nm
(17
ft-Ib)
"
VANOS
oil
supply
pipe
to
VANOS
control
unit
1
.
Remove
alternator
cooling
air
duct
.
banjo
bolt
.......
..
..
.
..........
32
Nm
(24
ft-Ib)
VANOS
(VARIABLE
VALVE
TIMING)
3
.
Remove
top
plastic
enginecovers
.
Disconnect
ignition
coil
harness
connectors
fromcofs
.
Remove
ignition
1993
and
later
6-cylinder
engines
are
equipped
with
a
vari-
coils
.
able
valve
timing
system
called
VANOS
.
This
system
is
con-
trolled
by
the
engine
management
system
and
dynamically
4
.
Remove
cylinder
head
cover
mounting
bolts
and
re-
adjusts
intake
camshaft
timing
based
on
engine
load,
engine
move
cylinder
head
cover
.
Unclip
andremove
oil
baffle
speed
and
engine
temperature
.
cover
from
above
intake
camshaft
.
See
113
Cylinder
Head
Removal
and
installation
.
The
main
components
of
the
VANOS
system
are
the
control
unit
with
piston
housing
and
integral
spool
valve,
and
the
mod-
ified
intake
camshaft
.
See
Fig
.
35
.
VANOS
(VARIABLE
VA
LVE
TIMING)
Fig
.
35
.
VANOS
control
unit
with
modified
intake
camshaft
.
B11001
WARNING
-
Special
BMW
service
tools
are
required
to
check
and
repair
the
VANOS
System
.
Read
theproce-
dures
through
before
beginning
the
job
.
2
.
Disconnect
crankcase
ventilation
hose
fitting
from
cyl-
inder
head
cover
.
NOTE-
Note
the
arrangement
of
the
cylinder
head
cover
bolt
insulators
and
gaskets
during
removal
.
5
.
Set
engine
to
approximate
TDC
by
rotating
in
normal
operating
direction
until
camshaft
lobes
at
cylinder
no
.
1
are
facing
each
other
.
See
Fig
.
20
.
6
.
Set
engine
to
TDC
by
aligning
"0/T"
mark
(0°TDC)on
front
vibration
damper
withcast
boss
on
lower
timing
chain
cover
.
See
Fig
.
21
.
7
.
Lock
crankshaft
in
position
by
inserting
BMW
special
tool
no
.
11
2
300
through
transmission
bellhousing
and
into
hole
in
flywheelor
driveplate
.
See
Fig
.
36
.
NOTE-
Confirm
that
the
locking
tool
has
been
correctly
in-
stalled
by
trying
to
rotatethe
crankshaft
.
Page 112 of 759
117-
1
6
CAMSHAFT
TIMING
CHAIN
15
.
Remove
crankshaft
locking
tool
.
Remove
special
test
equipment
.
Insta¡¡
oil
supply
line
using
new
seals
and
reconnect
solenoid
connector
.
Remainder
of
installa-
tion
is
reverse
of
removal
.
Tightening
Torque
"
Cylinder
head
cover
to
cylinder
head
.
10
Nm
(89
in-lb)
"
VANOS
oil
supply
line
to
VANOS
control
unit
(banjo
bolt)
..
.........
32
Nm
(24
ft-Ib)
"
VANOS
solenoidlo
VANOS
control
unit
........
.
.
.
..
........
30
Nm
(22
ft-Ib)
VANOS
control
unit,
removing
Special
BMW
service
tools
are
required
lo
remove
and
in-
stall
the
VANOS
control
unit
.
Read
the
procedure
through
be-
forestarting
the
job
.
1
.
Remove
radiator
cooling
fan
shroud
and
cooling
fan
.
See
170
Radiator
and
Cooling
System
.
CAUTION-
Radiator
fan
has
left
hand
threads
.
2
.
Remove
top
plastic
engine
covers
.
Disconnect
ignition
coil
harness
connectors
from
coils
.
Remove
ignition
coils
.
Remove
cylinder
head
cover
.
Unclip
andremove
oil
baffle
cover
from
above
intake
camshaft
.See
113
Cylinder
Head
Removal
and
Installation
.
NOTE-
Make
note
of
the
mounting
bolt
insulator
arrangement
during
removal
of
the
cylinder
head
cover
.
3
.
Set
engine
lo
TDC
by
rotating
engine
in
normal
operat-
ing
direction
until
camshaft
lobes
at
cylinder
no
.
1
are
facing
each
other
and
"0/T"
mark
(0°TDC)
on
vibration
damper
lines
up
with
cast
boss
on
lower
timing
chain
cover
.
See
Fig
.
38
.
4
.
Lock
crankshaft
at
TDC
by
inserting
BMW
special
tool
no
.
11
2
300
through
transmission
bellhousing
and
finto
flywheel
or
drive
plate
.
Refer
to
Fig
.
36
given
earlier
.
NOTE-
Confirm
that
the
locking
tool
has
been
correctly
in-
stalled
by
trying
to
rotatethe
crankshaft
.
5
.
Remove
three
cylinder
head
cover
mounting
studs
from
rear
of
head
.
Lockcamshafts
at
TDC
bymounting
BMW
special
tool
no
.
11
3
240
at
ends
of
camshafts
.
Check
that
tool
is
squarely
seated
on
cylinder
head
gasket
surface
.
If
necessary,
rotate
camshafts
slightly
using
a24
mm
wrench
.
Refer
to
Fig
.
24
given
earlier
.
VANOS
(VARIABLE
VALVE
TIMING)
Fig
.
38
.
Camshafts
positioned
at
TDC-Cyl
.
No
.
1
cam
lobes
face
in
Note
0/T
mark
(0°TDC)
on
vibration
damper
alígned
with
boss
on
front
cover
.
CA
UTION-
Thecamshafts
mustbe
locked
in
the
TDC
position
using
the
specialservice
tool
or
an
equivalent
be-
fore
removing
the
timing
chain
.
Thearrows
on
the
sprockets
should
not
be
used
to
accurately
set
the
engine
to
TDC
The
special
tool
holds
the
cam-
shafts
parallel
to
each
other
and
perpendicular
to
the
valve
cover
gasket
surface
.
6
.
Disconnect
harness
connector
and
oil
line
fitting
from
bottom
of
VANOS
control
unit
.
NOTE-
Wrap
the
VANOS
oilfine
fitting
with
a
shop
rag
to
ab-
sorb
leaking
oil
.
7
.
Remove
two
access
plugs
from
VANOS
control
unit
in
frontof
exhaustcamshaft
sprocket
.
Loosen
4exhaustcamshaft
sprocket
mounting
bolts
but
do
not
remove
(Torx
El
0
socket)
.
NOTE-
Removal
of
the
access
plugs
allows
the
lower
exhaust
camshaft
sprocket
mounting
bolts
to
be
accessed
.
8
.
Depress
secondary
timing
chain
tensioner
and
lock
it
in
down
position
by
inserting
a
stiff
wire
into
rear
of
ten-
sioner
.
See
Fig
.
27
.
9
.
Remove
VANOS
control
unít
mounting
nuts
and
boltat
front
of
cylinder
head
.
Page 114 of 759
117-
1
8
CAMSHAFT
TIMING
CHAIN
CAUTION-
It
is
crítical
that
the
exhaustcamshaft
sprocket
be
turned
only
the
mínimum
amount
necessary
to
engage
the
gear
cup
.
If
this
procedure
is
done
ín-
correctly,
the
VANOS
system
may
not
function
throughout
íts
full
range
.
NOTE-
As
the
control
unit
isinstalled,
the
secondary
sprockets
will
rotate
in
the
counterclockwise
direction
.
It
may
be
necessary
to
guide
sprockets
counterclockwise
as
the
control
unit
is
installed
.
8
.
On
cars
built
from3/95
:
Use
a
spanner
tool
(See
Fig
.
39
.),
turn
exhaust
sprocket
counterclockwise
(as
víewed
from
front
of
engine)
only
enough
to
mesh
gear
cup
splines
with
camshaftgear
.
Slowly
push
VANOS
control
unit
towards
camshaft
until
it
is
fully
seated,guiding
chains
in
counterclockwise
direction
.
CA
UTION-
Ensure
that
the
first
available
tooth
engages
.
9
.
Install
and
tightencontrol
unit
nuts
and
bolt
.
10
.
Connect
harness
connector
to
VANOS
solenoid
.
Using
new
seals,
insta¡¡
oil
line
fitting
.
Tightening
Torques
"
VANOS
control
unitto
cylinder
head
M6
nut
.....
..
..
.
.
.............
10
Nm
(89
in-lb)
M8
bolt
.....
.
.
.
.
..
.............
22
Nm
(17
ft-Ib)
"
VANOS
oil
supply
line
to
control
unit
.
32
Nm
(24
ft-Ib)
11
.
Slowlyunlock
and
release
secondary
chain
tensioner
.
12
.
Preloadprimary
chain
by
tightening
BMW
special
tool
no
.
112
240
(dummy
chain
tensioner)
to
1
.3
Nm
(11
in-
lb)
.
Then
tighten
exhaust
camshaft
sprocket
mounting
bolts
alternately
in
two
stages
.
Tightening
Torque
"
Secondarytiming
chain
sprockets
to
camshafts
(Tora
boits)
Stage
1
..
...............
...
.
.
...
5
Nm
(44
in-lb)
Stage
2
..
...............
...
.
.
..
22
Nm
(17
ft-Ib)
VANOS
(VARIABLE
VALVE
TIMING)
13
.
Remove
flywheel
locking
tool
from
transmission
bell-
housing
.
Remove
camshaft
locking
tool
from
rear
of
cylinder
head
.
14
.
Turn
engine
over
by
hand
at
least
two
fui¡
crankshaft
ro-
tations
.
Reinstall
camshaft
locking
tool
and
flywheel
locking
toolto
make
sure
all
adjustments
are
correct
.
If
settings
are
correct,
remove
locking
tools
.
15
.
Remove
BMW
special
tool
112
420
(dummy
chain
ten-
sioner)
from
side
of
cylinder
head
.
Install
primary
chain
tensioner
so
that
cutout
in
tensioner
piston
engages
chain
rail
.
See
Fig
.
34
.
Using
new
seals,
install
and
tighten
access
plugs
in
VANOS
control
unit
.
Tightening
Torque
"
Access
plugs
to
VANOS
control
unit
.
..
.
.....
.
..
...
50
Nm
(37
ft-lb)
"
Primary
timing
chain
tensioner
plug
to
tensioner
sleeve
M50/S50USengine
.
.
..
.
.
...
.
...
..
50
Nm
(37
ft-Ib)
M52/S52US
engine
...
..
...
...
...
40
Nm
(30
ft-Ib)
16
.
Install
oil
baffle
cover
above
intake
camshaft
.
Install
three
cylinder
head
covermounting
studs
to
rear
of
head
.
Instali
cylinder
head
cover
.
Tightening
Torque
"
Cylinder
head
cover
to
cylinder
head
(M6
screws)
......
10
Nm
(89
in-Ib)
17
.
Installationof
remaining
parts
is
reverse
of
removal
.
NOTE-
Be
sure
to
install
the
ground
wíres
at
the
cylinder
head
cover
mounting
studs
and
at
the
front
of
the
cylinder
head,
if
applicable
.
Page 117 of 759
NOTE
-
The
guide
tube
is
sealed
in
the
pan
with
an
O-ring
.
Check
that
theO-ring
comes
out
with
the
tube
.
Use
a
new
O-ring
when
installing
the
tube
.
Fig
.
2
.
Oil
dipstick
guide
tube
mounting
nut
(arrow)
on
M44
engine
.
Use
new
O-ring
at
base
of
tube
during
installatidn
.
6
.
Install
engine
lifting
equipment
at
front
engine
lifting
point
and
raise
engine
approximately
5
mm
(
1
/4
inch)
until
engineweight
is
supported
.
7
.
Workingbeneath
car,
separate
steering
column
shaft
from
steeringrack
at
universal
joint
.
"
Point
wheels
straight
ahead
before
disconnecting
shaft
from
rack
.
Mark
steering
column
shaft
joint
to
steering
rackspíndle
.
See
320
Steering
and
Wheel
Align-
ment
.
CAUTION
-
In
order
to
avoíd
the
need
for
front-end
realign-
ment,
do
notunbolt
power
steering
rack
from
sus-
pension
crossmember
.
8
.
Supportsuspension
crossmember
(subframe)
from
be-
low
usingappropriate
jacking
equipment
.
9
.
At
left
and
right
sides,
unbolt
control
arm
bushing
carri-
ers
from
body
.
Disconnect
stabilizer
bar
links
fromcon-
trol
arms
.
See
Fig
.
3
.
LUBRICATION
SYSTEM
119-
3
0011960
Fig
.
3
.
Stabilizer
bar
link
nut
(A)
and
control
arm
bushing
carrier
bolts
(B)
.
Right
side
shows
.
10
.
Remove
bolts
from
left
and
right
sides
of
suspension
crossmember
.
RemoveM10
nuts
from
bottom
of
left
and
right
engine
mounts
.
Lower
crossmember
as
far
as
possible
.
See
Fig
.
4
.
uu1ibb4
Fig
.
4
.
Suspension
crossmember
bolts
(A)
and
lower
engine
mount-
ing
nut
(B)
.
Right
side
shows
.
11
.
Remove
clamping
brackets
holding
fuel
lines
to
oil
pan
.
12
.
On
cars
with
automatic
transmission,
remove
ATF
cool-
er
line
brackets
from
oil
pan
.
13
.
Remove
engine
drive
belt
from
power
steering
pump
.
See020
Maintenance
Program
.
14
.
Unbolt
power
steering
pumpbracket
andremove
bracket
with
pump
.
Hang
pump
from
chassis
using
wire
.
OIL
PAN
Page 119 of 759
8
.
Remove
air
plenum
from
rear
of
engine
compartment
.
See
640
Heating
and
Air
Conditioning
.
9
.
Release
drive
belt
tension
and
remove
alternator
drive
belt
.
Remove
A/C
compressor
drive
belt
.
See
Fig
.
6
.
B11143
Fig
.
6
.
To
remove
poly-ribbed
drive
belt,
pry
cover
from
front
of
ten-
sioner
.
Then
using
8
mm
hex
key,
turntensioner
clockwise
(arrow)
torelease
tension
and
slip
belt
off
pulleys
.
10
.
Unbolt
power
steering
reservoir
and
pull
reservoir
off
engine
mount
bracket
.
11
.
Without
disconnecting
fluid
lines,
remove
power
steer-
ing
bracket
(with
pump)
from
oil
panand
engine
block
.
See
Fig
.
7
.
Disconnect
fluid
lines
from
bracket
on
en-
gine
mount
.
Hang
pump
from
chassis
using
wire
.
12
.
Without
disconnecting
refrigerant
lines,
remove
A/C
compressor
from
engine
block
.
Hang
compressor
from
chassis
using
wire
.
See
640
Heating
and
Air
Condi-
tioning
.
13
.
Remove
oil
dipstick
guide
tube
mounting
bolt
and
re-
move
tube
.
See
Fig
.
8
.
NOTE-
The
guide
tube
is
sealed
in
the
oil
pan
with
an
O-ring
.
Check
that
the
O-ring
comes
out
with
the
tube
.
Use
anew
O-ring
when
installing
the
tube
.
14
.
On
cars
with
automatic
transmission,
remove
brackets
holding
ATF
cooler
linesto
oil
pan
and
cylinder
block
.
LUBRICATION
SYSTEM
119-
5
Fig
.
7
.
Power
steering
pump
mounting
bolts
(arrows)
.
Fig
.
8
.
Oil
dipstick
guide
tube
being
removed
.
Usea
new
O-ring
(arrow)
during
installation
.
15
.
Insta¡¡
engine
lifting
equipment
at
front
engine
lifting
point
and
raise
engine
just
until
its
weight
is
supported
.
16
.
Remove
nuts
at
bottom
of
left
and
right
engine
mounts
.
Remove
ground
wire
from
right
engine
mount
.
1-oosen
nuts
at
top
of
left
and
right
engine
mounts
(do
not
re-
move)
.
OIL
PAN