1997 BMW 328i crankshaft pulley

117-2



CAMSHAFT
TIMING
CHAIN

CAMSHAFT
TIMING
CHAIN,

4-CYLINDER

Special
BMW
service
tools
are
needed
for
timing
chain
re-
moval
and
installation
procedures
.
The
special
tools
assure

proper
timing
of
the
valvetrain
.
Precíse
marks
to
setthe
timing

on
the
camshafts
are
not
provided
for
reassembly
.
Read
the

procedures
through
before
beginning
the
job
.

CAUTION-

lf
the
camshaftsare
not
properly
timed,
the
pis-
tons
can
contact
thevalves
.

Camshaft
timing
chain,
removing

(4-cylinder
engines)
U0119-

Fig
.
3
.



Upper
timing
chain
covermounting
bolts(arrows)
.
Thermo-
1
.
Disconnect
negative
(-)cablefrom
battery
.



stat
housing
shown
removed
.
Cylinder
ídentification
sensor
(A)
also
shown
.

CAUTION-

Prior
to
disconnecting
the
battery,
read
the
battery
disconnection
cautions
given
at
the
front
of
this
manual
on
page
viii
.

2
.
Drain
engine
coolant
.
Drain
engine
block
byremoving
block
drain
.
Remove
radiator
cooling
fan
shroud
and
cooling
fan
.
See
170
Radiator
and
Cooling
System
..

WARNING
-

Allow
the
engine
to
cool
before
openingor
draining
the
cooling
system
.

CA
UTION-

On
cars
with
viscous-type
fan
clutch,
fan
has
left
hand
threads
.

NOTE-

The
block
drain
plug
is
located
on
the
exhaust
sideof
the
engine,
below
cylinder
no
.
4
.

3
.
Remove
cylinder
head
cover
.
See
113
Cylinder
HeadRemoval
and
Installation
.

NOTE-

Make
note
of
the
arrangement
of
the
rubber
insulators
when
removing
the
cylinder
head
cover
mounting
belts
.

4
.
Loosen
sparkplugs
.
See
120
Ignition
System
.

5
.
Disconnect
coolant
hoses
from
thermostat
housingon
front
of
cylinder
head
.
Unbolt
thermostat
housing
from
cylinder
head
.

6
.
Remove
cylinder
identification
sensor
from
upper
tim-
ing
chain
cover
.
Remove
upper
timing
chain
cover
.
See
Fig
.
3
.

CAMSHAFT
TIMING
CHAIN,
4-CYLINDER

7
.
Set
engine
to
approximate
TDC
by
rotating
in
normal
operating
direction
until
camshaft
lobes
at
cylinder
no
.

1
are
facing
up
and
toward
each
other
.
See
Fig
.
4
.

0011998
Fig
.
4
.



Engine
set
to
approximate
TDC
.
Cylinder
no
.
1
camshaft
lobes
face
in
and
sprocket
arrows
point
up
(arrows)
.

8
.
Remove
air
conditioning
drive
belt
.
Loosenand
push
aside
air
conditioning
compressor
.
Remove
air
condi-
tioning
compressor
mounting
bracket
.
See
640
Heat-
ing
and
Air
Conditioning
.

9
.
Remove
engine
drive
belts
and
coolant
pump
pulley
.
See
020
Maintenance
Program
.

10
.
Secure
crankshaft
vibration
damper
to
prevent
crank-
shaft
from
turning
.
Using
a
socket,
loosen
vibration
damper
hub
center
bolt
.

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
.

Fig
.
22
.
Vibration
damper
with
drive
belt
pulley
being
removed
.
Notehub
locating
dowel
(arrow)
.

Fig
.
23
.
BMW
special
tool
no
.
11
2
300
installed
through
bellhousing
and
into
flywheel
.

20
.
Remove
primary
chain
tensioner
plug
and
primary

chain
tensioner
.
See
Fig
.
25
.

CAMSHAFT
TIMING
CHAIN



117-
9

Fig
.
24
.
BMW
special
tool
no
.
113
240
installed
on
rear
of
camshafts
to
position
camshafts
at
TDC
.
(M44
camshafts
shown
.
Other
engines
are
similar
.)

Fig
.
25
.
Primary
chain
tensioner
plug
(arrow)
.

CAUTION-

"
Check
thattool
is
squarely
seated
on
cytinder
head
gasket
surface
.
If
necessary,
rotate
cam-
shafts
slightly
using
a
24
mm
wrench

"
On
pre-VANOS
engines
(engines
built
up
to
8-
92),
the
camshaft
locking
tool
may
not
fit
correct-
ly
when
the
crankshaft
is
set
to
TDC
.
Do
notas-
sume
the
valve
train
is
out
oftime
.
On
some
engines,
valve
overlap
may
havebeen
reduced

as
a
dealer
service
campaign
to
correct
for
an

uneven
idle
.
Check
thetiming
by
placing
a
3mm
drill
bit
under
the
left
and
right
outside
edges
while
pressíng
down
on
thecenter
of
the
tool
(tool
center
bolts
loosened)
.
If
the
tool
now
fits,

the
campaign
has
beendone
on
the
engine
.

CAMSHAFT
TIMING
CHAINS,
6-CYLINDER

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

610-12



ELECTRICAL
COMPONENT
LOCATIONS

Table
a
.
E36
Component
Locations

Component



Model
Year



Location



Refer
to

Combination
(Stalk)
Switch



1993-1998



Left
sidesteering
column
(turn
signals/high-low
bean
switch)

Convertible
Top
ActuatingSwitch



1994-1998



Center
console

Convertible
Top
Control
Module



1994-1998



In
lower
left
C-pillar
behind
trim
panel

Convertible
TopEnd
Position
Switch



1994-1998



In
convertible
top
linkage

Convertible
Top
Motor



1994-1998



In
left
sideof
trunk
behind
trim
panel

Convertible
Top
Position



1994-1998



In
convertible
top
linkage
Microswitch
Convertible
Top
Storage
Lid
Lock



1994-1998



In
convertible
top
compartment
left
side
Motor

Convertible
Top
Storage
Lid



1994-1998



Inright
side
convertible
top
storage
lid
latch
Microswitch

Convertible
Top
Storage
Lid
Motor



1994-1998



In
left
side
of
trunk
behind
trim
panel

Coolant
Leve¡
Sensor
(if
applicable)



1992-1998



Bolted
on
radiator,
left
side

Coolant
Temperature
Sensor



1992-1998



Left
front
of
engine/cylinder
head



Fig
.
19
.
Fig
.
20
.

Cooling
Fan
Dual
Switch



1992-1998



Right
side
radiator



Fig
.
18
.

Cooling
Fan
Motor



1992-1998



Behind
front
grill

Crankshaft
Position/RPM
Sensor



1992-1995



At
front
crankshaft
pulley

Crankshaft
Position/RPM
Sensor



1996-1998



Left
rearof
crankcase

Crash
Sensor,
Airbag



1992-1993



On
right/left
frontstrut
tower

Crash
Control
Module



1992



Auxiliary
relay
panel

Crash
Control
Module



1993-1998



Driver's
side
footwell

Crash
Sensor,
Right/Left
Side



1997-1998



Right/left
door
sill
behind
front
seat
Impact
Airbag

Cruise
Control
Actuator



1992-1998



Left
front
of
engine
compartment



Fig
.
7
.

Cruise
Control
Module



1992-1998



Behind
glove
compartment



Fig
.
8
.
Fig
.
9
.

Data
Link
Connector



1992-1998



Right
sideof
engine



Fig
.
7
.

Digital
Motor
Electronics
(DME)



1992-1998



Right
rear
engine
compartment,
behind
bulkhead
panel



Fig
.
7
.
Control
Module

DoorLock
Heater



1993-1994



Left
front
doorhandle
DoorHandle
Switch



1994-1998



left
front
door

Drive-away
Protection
(EWS
II)



1/1995
-
1998



Behind
glove
compartment



Fig
.
8
.
Module



Fig
.
9
.

Dual
Coolant
Temperature
Sensor



1997-1998



Below
intake
manifold



Fig
.
19
.

COMPONENT
LOCATIONS

Fig
.
20
.

Electronic
Immobilizer
Control



(
1/1995-1998
~
Behind
glove
compartment



Fig
.
8
.
Module
(EWS
II)



Fig
.
9
.

Continued