Stall BMW 323i 1996 E36 Manual Online

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

119-
6



LUBRICATION
SYSTEM

17
.
Raise
engine
as
much
as
possible
.
Check
carefully
for



22
.
Installation
is
reverse
of
removal
.

obstructions,
wiring
harness
clearance
and
pinched

hoses
or
lines
as
engine
is
raised
.



"
When
installing
oil
pan,
apply
a
b



d
of
non-hardening

sealing
compound
(3-Bond
1209
0
or
equivalent)
to

18
.
Remove
oil
pan
mounting
bolts
and
lower
oil
pan
to



front
and
rear
end
cover
seam
areas
on
block
.

subframe
crossmember
.



"
Position
oil
pump
pickup
tube
and
oil
pan
onto
block

and
install
pickup
tube
using
a
new
gasket
.

"
Be
sure
tab
on
gasket
faces
down
towards
intake
of

NOTE-



pickup
tube
.
If
the
oil
pan
does
not
separate
easily
from
the
engine



"
Tightenforward
oil
pan
screws
first,
then
tighten
rear
.

cylinder
block,
afew
taps
with
arubber
mallet
should



"
Fill
engine
with
oil
as
described
in
020
Maintenance
break
it
free
.
Do
not
pry
the
oil
pan
loose
.



Program
.

"
After
adding
engine
oil,
start
and
run
engine
.
Raise
en-

19
.
Remove
oil
pump
sprocket
mounting
nut
.
See
Fig
.
9
.



gine
speed
to
2,500
rpm
until
oil
pressure
warning

Lift
sprocket
off
together
with
drive
chain
.



lampgoes
out(about
5seconds)
.

Fig
.
9
.
Oil
pump
sprocket
mounting
nut
(left-hand
thread)
on
6-cylin-



OII
pan,
removing
and
installing

derengine(arrow)
.



(6-cylinder
engine,
1993
and
later
modeis)

NOTE-

The
oíl
pump
sprocket
nut
has
left
hand
threads
.

20
.
Unbolt
oil
pump
pickup
tubefrom
oil
pump
.
Unbolt
oil

pump
from
engine
block
.
See
Oil
pump,
removing

and
installing
(6-cylinder
engine)
.

21
.
Remove
oil
pan
from
rear
.

Tightening
Torques

"
Engine
mount
to

suspension
crossmember(M10
nut)
..
42
Nm
(31
ft-Ib)

"
Oil
pan
to
engine
block
(M6
bolt)

8
.8
grade
....
..
.
...
...
.
........
10
Nm
(89
in-lb)

10
.9
grade
.
.
..
.
..
...
.
.
.
.
.
.....
12
Nm
(106
in-lb)

"
Oil
pump
to
engine
block
.
...
...
.
..
22
Nm
(16
ft-Ib)

"
Oil
pump
sprocket
to
oil
pump
shaft

(M1
0x1
left-hand
thread)
...
..
.
.
..
.
25
Nm
(18
ft-Ib)

"
Power
steering
pump
to
bracket

(self-locking
nuts)
.....
.
....
..
.
...
22
Nm
(16
ft-lb)

"
Power
steering
pump
bracket
to
engine

block
or
oil
pan
(self-locking
nuts)
.
..
22
Nm
(16
ft-Ib)

NOTE-

Cars
built
after
9/92
use
a
different
suspension
cross-

member
¡han
earfier
productíon
cars
.
Oil
pan
removal

procedure
on
the
later
cars
requíres
that
the
engine
be

supported
from
aboye
and
the
front
suspension
cross-

member
be
unbolted
and
loweredfrom
the
chassis
.

1
.
Raisecar
and
place
securely
on
jackstands
.

2
.
Remove
splash
shield
fromunder
engine,
if
applicable
.

3
.
Drain
engine
oil
as
descríbed
in
020
Maintenance
Pro-

gram
.

4
.
Remove
alternator
cooling
duct
from
alternator
and
ra-

diator
support
.

5
.
Remove
air
filter
housingcomplete
with
mass
air
flow
sensor
.
See113
Cylinder
HeadRemoval
and
Instal-
lation
.

6
.
Remove
oil
dipstick
guide
tube
mounting
bolt
.
Discon-
nect
oil
separator
hose
frombase
of
guide
tube
and
re-
move
tubefrom
oil
pan
(where
applicable)
.
See
Fig
.
10
.

NOTE-

The
guide
tube
is
sealed
in
the
blockusing
an
O-ring
.
Check
that
the
O-ring
comes
out
with
the
tube
.
Use
a
new
O-ring
when
installing
the
tube
.

Fig
.
10
.
Oil
dipstick
guide
tube
being
removed
.
Use
new
O-ring
(ar-
row)
during
installation
.

7
.
M50/S50US
engine
:
Using
a
clean
syringe,
remove
power
steering
fluid
from
fluid
reservoir
.
Disconnect
power
steering
fluid
lines
from
steering
rack
.
See
320
Steering
and
Wheel
Alignment
.

8
.
M52/S52US
engine
:
Unbolt
power
steering
reservoir
from
engíne,
then
tie
to
chassis
with
wire
.

9
.
Insta¡¡
engine
lifting
equipment
atfront
engine
lifting
point
and
raise
engine
approximately
5
mm
('/a
inch)
until
engineweight
is
supported
.
See
Fig
.
11
.

10
.
Workingbeneath
car,
separate
steering
column
shaft
from
steeringrack
at
universal
joint
.

"
Mark
steering
column
shaft
jointto
steering
rack
spin-

dle
.
Point
wheels
straight
ahead
before
disconnecting
shaft
from
rack
.
See
320
Steering
and
Wheel
Align-
ment
.

LUBRICATION
SYSTEM



119

Fig
.
11
.
Engine
lifting
equipment
shown
installed
acrossengíne
.

CA
UTION-

In
order
to
avoid
the
need
for
front-end
realign-
ment,
donot
unbolt
power
steering
rack
from
sus-
pension
crossmember
.

11
.
Support
suspension
crossmember
from
below
using
appropriate
jacking
equipment
.

12
.
Loosen
nuts
at
top
of
left
and
right
side
engine
mounts
.
Remove
nuts
from
bottom
of
left
and
right
side
engine
mounts
.

13
.
At
left
and
right
sides,
unbolt
control
arm
bushíng
carri-
ers
from
body
.
Disconnect
stabilizer
bar
links
fromcon-
trol
arms
.
Refer
to
Fig
.
3
.

14
.
Remove
bolts
from
left
and
right
sides
of
suspension
crossmember
and
lower
front
axle
as
far
as
possible
.

15
.
Remove
fuelline
clamping
brackets
from
oil
pan
.
On
cars
with
automatic
transmission,
remove
ATF
cooler
line
brackets
from
oil
pan
.

16
.
Remove
oil
pan
screws
.
Lower
and
remove
oil
pan
for-
ward
to
remove
.

CA
UTION-

If
the
oil
pan
does
not
separate
easily
from
the
en-
gine
cylinder
block,
a
few
taps
with
a
rubber
mallet
shouldbreak
it
free
.
Do
notpry
the
oil
pan
loose
.

OIL
PAN

119-
8



LUBRICATION
SYSTEM

17
.
Installation
is
reverse
of
removal
.

"
Thoroughly
clean
all
old
gasket
material
from
mating

surtaces
anduse
a
new
gasket
.

"
Applya
small
amount
of
non-hardening
sealer
(3-Bond

1209
0
or
equivalent)
to
oil
pan
gasket
directly
below

joints
for
and
cover
and
front
timing
case
cover
.
See

Fig
.
12
.

"
Tighten
oil
pan
bolts
starting
at
front
first,
working
to-

wardback
(transmission)
end
.

"
Fill
engine
with
oil
as
described
in
020
Maintenance

Program
.

"
After
addingengine
oil,
start
and
run
engine
.
Raiseen-

gine
speed
to
2,500
rpm
until
oíl
pressure
warning

lampgoes
out
(about
5seconds)
.

OIL
PUMP

applied
(arrows)
.
Apply
a
bead
3
mm
wideby
2
mm
high
.

WARNING
-

"
Always
use
new
bolts
when
mounting
the
sub-

frame
to
the
body
.
The
one-time
only
bolts
should
be
replaced
any
timethey
are
removed
.

"
Special
installation
instructions
apply
when
in-
stalling
the
front
suspension
crossmember
to
the
body
.
See
310
Front
Suspension
for
fastener
specifications
and
tightening
torques
.

Fig
.
12
.
Joint-mating
areas
at
oil
pan
gasket
where
sealer
should
be

Center
the
steering
spindle
to
the
steering
rack
before
in-

stalling
the
steering
column
shaft
.
See
320
Steering
and

Wheel
Alignment
for
more
specific
procedures
.

Tightening
Torques

"
Control
arm
bushing
carrier

to
body
(M10
bolt)
...............
47
Nm
(35
ft-Ib)

"
Engine
mount
to

suspension
crossmember(M10
nut)
..
42
Nm
(31
ft-Ib)

"
Oil
pan
to
engine
block
(M6
bolt)

8
.8
grade
...........
.......
....
10
Nm
(89
in-lb)

10
.9
grade
...........
..
...
...
.
12
Nm
(106
in-lb)

"
Stabilizer
bar
link

to
control
arm
(M10
nut)
.......
....
42
Nm
(31
Ib-ft)

"
Steering
column
universal
joint

to
steering
rack
spindle
(M8
bolt)
....
19
Nm
(14
ft-Ib)

"
Suspensíon
crossmember

to
body
...
...
.
...
..
.
.
See
310
Front
Suspension

OIL
PUMP

Oil
pump,
removing
and
installing

(4-cylinder
engine)

Oil
pressure
on
M42
and
M44
engines
is
generatedbya

gear-type
pump
mounted
to
the
rear
of
the
front
engine
cover

(timing
chaincase)
.
The
pump
is
gear-driven
off
the
front
of

the
crankshaft
.

NOTE-

Oil
pump
removal
requires
lowering
of
the
front
sus-

pension
and
removal
of
the
oil
pan,
as
well
asremoval
of
the
timing
chain
assembly
.

1
.
Disconnect
negative
(-)
battery
cable
from
battery
.

CAUTION-

Prior
to
disconnectiog
the
battery,
read
the
battery
disconnection
cautions
given
at
the
front
of
this
manual
on
paga
vÍii
.

2
.
Drain
engine
oil
as
described
in
020
Maintenance
Pro-

gram
.

3
.
Withengine
cold,
drain
coolant
.
See
170
Radiator
and

Cooling
System
.

4
.
Remove
top
cover
from
oil
filter
housing
to
allow
engine

oil
to
drain
into
oil
pan
.
Remove
oil
pan
as
described

earlier
.
Reinstall
oil
filter
cover
.

5
.
Remove
alternator
.
Unbolt
power
steering
pump
from

bracket,
then
remove
alternator
mountíng
bracket
.
See

121
Battery,
Starter,
Alternator
.

6
.
Remove
crankshaft
vibration
damper
andhub
.
Then
re-

move
upper
and
lower
timing
chain
covers,
complete

timingchain,
chain
sprockets
and
chain
guides
.
See

117
Camshaft
Tíming
Chain
.

7
.
Unbolt
timing
chain
casefrom
frontof
engine
.
See
Fig
.
13
.



9
.
Installation
is
reverse
of
removal
.

Fig
.
13
.
Timing
chain
case
mounting
bolts
(arrows)
on
M44
engine
.

8
.
Remove
cover
from
oil
pump
on
rear
of
timing
chain

case
.
See
Fig
.
14
.
Inspect
oil
pump
gears
and
oil
pump

cavity
in
timing
chain
case
for
wear
andlor
scoring
.

Fig
.
14
.
Oil
pump
cover
mounting
bolts
(arrows)
on
M44
engine
.

LUBRICATION
SYSTEM



119-
9

"
Replace
al¡
gaskets
and
O-rings
.
"
Install
a
new
rubber
sea¡
(profile
gasket)
between
top
of
timing
chain
case
and
cylinder
head
.

"
Be
sure
to
thoroughly
clean
sealing
surfaces
.
-Use
3-Bond
1209
orequivalent
sealant
on
both
sides

of
sea¡
before
installing
.

10
.
Protect
profile
gasket
using
thin
sheet
metal
(BMW
special
tool
no
.
11
2
330)
when
installing
timing
chain

case
.
See
Fig
.
15
.

"
Applya
thin
coating
of
grease
to
both
sides
of
sheet
metal
tool
and
to
top
surface
of
profile
gasket
.

"
Placesheet
metal
between
gasket
and
cylinder
head

and
carefully
slíde
upper
chain
cover
into
position
.

"
Tighten
al¡
mounting
bolts
and
then
carefully
withdraw

sheet
metal
.
Install
timing
chain
as
described
in
117

Camshaft
Timing
Chain
.

Fig
.
15
.
Use
thin
sheetmetal
(arrow)
toprotect
profile
gasket
during
installation
of
timing
chain
case
.
Carefully
withdraw
sheetmetal
after
tightening
fasteners
.

Tightening
Torques

"
Timing
chain
case
to
engine
block

M6
..
.
...
...
.
..
.............
.
.10
Nm
(7
.5
ft-Ib)

M8
........
.
..
..
..............
22
Nm
(16
ft-Ib)

"
Thermostathousing
to
upper

timing
chain
cover(M6)
............
10
Nm
(89
in-lb)

"
OH
filter
cover

to
oil
filter
housing
(M8)
.
.
.........
25
Nm
(18
ft-lb)

"
Oil
pump
cover
to
timing
chain
case
(M6)
...
..
.......
10
Nm
(89
in-lb)

"
Oil
pan
to
engine
block
(M6
bolt)

8
.8
grade
.........
.
.
..
.........
10
Nm
(89
in-lb)

10
.9
grade
............
.
.......
12
Nm
(106
in-lb)

"
Alternator
to
alternator
bracket
.....
43
Nm
(32
ft-Ib)

OIL
PUMP

119-
1
0



LUBRICATION
SYSTEM

Oil
pump,
removing
and
installing

(6-cylinder
engine)

Oil
pressure
on
the
6-cylinder
engines
is
generated
by
a
gear-type
pump
bolted
to
the
bottom
of
the
engine
block
.
The
oil
pump
is
chain
driven
off
the
front
of
the
crankshaft
.

NOTE-

Oil
pump
removal
requires
raising
the
engine
(cars
built
up
to
9-92)
or
lowering
the
front
suspension
crossmem-
ber
(cars
built
from
9-92)
to
remove
the
oil
pan
.

1.
Drain
oil
as
described
in
020
Maintenance
Program
.

2
.
Remove
oil
pan
as
described
earlier
.

3
.
Remove
oil
pump
sprocket
mounting
nut
(left-hand
thread)
.
See
Fig
.
16
.
Lift
sprocket
off
together
with
drive
chain
.

Fig
.
16
.
Oil
pump
sprocket
mounting
nut
(left-hand
thread)
on
6-cylin-
der
engine
(arrow)
.

4
.
Remove
mounting
bolts
from
oil
pump
and
oil
pump
pickup
tube
.
Withdraw
pump
.

NOTE-

Note
any
spacers
between
pump
and
engine
block
.
See
Fig
.
17
.

"
Note
position
of
locating
dowels
.

OIL
PUMP

811186

0011952

Fig
.
17
.
Oil
pump
mounting
points
(1)
and
pickup
tube
mountíng
points
(2)
.

5
.
Remove
coverfrom
oil
pump
and
check
for
wear
or
scoring
.
Spin
oil
pump
shaft
and
check
that
gears
turn
smoothly
.
Replace
pump
if
gears
spinwith
difficulty
or
any
wear
is
present
.

6
.
Installation
is
reverse
of
removal,
noting
the
following
:

"
Align
sprocket
splines
to
oil
pump
shaft
splines
before

tightening
sprocket
nut
.

Tightening
Torques

"
Oil
pump
to
engine
block
(M8)
......
22
Nm
(16
ft-Ib)

"
Oil
pan
to
engine
block
(M6
bolt)

8
.8
grade
..
...
.
...
...
.
.........
10
Nm
(89
in-lb)

10
.9
grade
.
...
.
..
....
.
........
12
Nm
(106
in-lb)

"
Oil
pump
sprocket
to
oil
pump
shaft
(M1
0x1
left-hand
thread)
..........
25
Nm
(18
ft-Ib)

120-
4



IGNITION
SYSTEM

2
.
Check
for
battery
voltage
o
cofs
.
If
voltage
is
not



Table
b
.
Ignition
Coil
Resistance

present,
check
wire
between
terminal
15
and
ignition



(M42
Engine)
switch
.
See
Electrical
Wiring
Diagrams
.

"
On
M42
engine,
connect
digital
multimeter
between
ter-

minal
15(+)
in
each
harness
connector
and
ground
.
See

Fig
.
4
.

"
On
M44
engine,
connect
voltmeter
between
terminal
2

(15+)
in
connector
and
ground
.
Turn
ignition
on
and

check
for
voltage
.
See
Fig
.
5
.

3
.
Turn
ignition
off
.

0
4a15

Fig
.
4
.



Ignition
coil
harness
connector
terminal
identification
for
M42

engine
.

Fig
.
5
.



Ignition
coil
harness
connector
terminal
identification
for
M44
engine
.

CAUTION-

The
wiring
to
the
coil(via
the
ignition
switch
15+)
is
not
fuse
protected
.
Use
care
when
testing
thiscircuit
.

4
.
Use
a
digital
multimeter
totest
coil
primary
resistance
.

"
On
M42
engine,
use
Table
b
asa
guide
to
check
coil

resistance
.
Make
checks
at
each
harness
connector
.

"
On
M44
engine,
use
Table,c
as
a
guide
to
check
coil
primary
resistance
.

5
.
Inspect
coil
housing
for
hairline
cracks
or
leaking
cast-
ing
material
.
See
Fig
.
7
.
A
leaky
ignition
coil
may
indi-



11502

cate
a
faulty
ECM
(engine
control
module)
.
Check
the
ECM
before
installing
a
new
coil
.



Fig
.
6
.



Ignition
coil
harnessconnector
terminal
identification
for
6-
cylinder
engine
.

IGNITION
SYSTEM
SERVICE

11502

Terminals
Resistance
(refer
to
Fig
.
4
.)

Coil
primary



1
(-)
and
15
(+)



10
.4-0
.8
ohms

Coil
secondary



N
.A
.



N
.A
.

Table
c
.
Ignition
Coil
Resistance

(M44
Engine)

Terminais
Resistance
(referto
Fig
.
5
.)

Coil
#1
primary



1
(-)
and
2
(+)



0
.4-0
.8
ohms

Coil
#2
primary



6
(-)
and2
(+)



0
.4-0
.8
ohms

Coil
#3
primary



7
(-)
and
2
(+)



0
.4-0
.8
ohms

Coil
#4
primary



5
(-)
and2
(+)



0
.4-0
.8
ohms

Coil
secondary



N
.A
.



N
.A
.

NOTE-

If
a
single
coilís
faulty
on
M44
engines,
the
complete
coil
pack
will
have
to
be
replaced
.

Ignition
coil,
testing
and
replacing

(6-cylinder
engine)

CAUTION-

Use
a
digital
multimeter
for
the
following
tests
.

1.
Remove
plastic
enginecovers
from
top
of
engine
by

prying
off
nut
covers
and
removingcover
mounting

nuts
.
See
113
Cylinder
HeadRemoval
and
Installa-

tion
.

2
.
Disconnect
harnessconnectorfromcof
.
Connect
mul-
timeter
between
terminal
15
(+)
in
connector
and

ground
.
See
Fig
.
6
.

3
.
Turn
ignition
on
and
check
for
batteryvoltage
.

"
If
batteryvoltage
is
not
present,
check
wire
between

terminal
15
and
ignition
switch
.
See
Electrical
Wiring

Diagrams
.

"mozo

CAUTION
-

The
wiring
to
termina¡
15
(+)
of
the
coil(vía
the
ig-

nition
switch)
is
not
fuse
protected
.
Use
care
when
testíng
thiscircuit
.

4
.
Turn
ignition
off
.

5
.
Use
a
multimeter
to
test
coil
primary
resistanceat
coil

terminals
.
See
Table
d
.

Table
d
.
Ignition
Coil
Resistance

(6-cylinder
Engine)

Terminals
Resistance

(referto
Fig
.
4
.)

Coil
primary



1
1
(-)
and
15
(+)



X
0
.4-0
.8
ohms

Coil
secondary



l
N
.A
.



N
.A
.

6
.
Remove
coil
and
inspect
coil
housing
for
hairline
cracks

or
leaking
casting
material
.
See
Fig
.
7
.
A
leaky
ignition

coil
may
indícate
a
faulty
engine
control
module
(ECM)
.

Check
ECM
before
installing
a
new
coil
.

811004

Fig
.
7
.



Ignition
coil
being
removed
on
6-cylinder
engine
(M52
engine

shown)
.

CA
UTION-

"
Note
location
of
coil
ground
straps
before
coilre-

moval
;
reinstallin
the
same
location
.

"
When
replacing
ignition
coils,
ensure
that
the
re-

placement
coil(s)
are
from
the
same
manufactur-

er
containing
the
same
partlcode
numbers
.
If

individual
coils
with
the
correct
specifications
are
not
available,
all
coils
should
be
replaced
.

IGNITION
SYSTEM



120-
5

Crankshaft
Position/rpm
Sensor

If
the
engine
control
module
(ECM)
does
not
receive
a

crankshaft
position
signal
during
cranking,
the
engine
will
not

start
.

On
1992-1995(pre-OBD
II)
cars,
the
crankshaft
posi-
tion/rpm
sensor
is
mounted
on
the
front
engine
cover
and

reads
the
toothed
vibration
dampener
wheel
.
See
Fig
.
8
.

Fig
.
8
.



Crankshaft
position/rpm
sensor
mounted
at
front
of
engine
on
1992-1995
cars
.
(arrow)
.

On
1996
and
latee
cars
(OBD
II
compliant),
the
crankshaft
position/rpm
sensor
is
mounted
in
the
left
rear
side
of
the
cyl-

inderblock
.
The
sensor
reads
a
toothed
wheel
mounted
to
the

end
of
the
crankshaft
.
See
Fig
.
9
.

Fig
.
9
.



Crankshaft
position/rpm
sensor
toothed
wheel
mounted
to

rear
of
crankshaft
OBD
II
compliant
cars
.
The
sensor
is

mounted
in
the
left
rear
side
of
the
cylinder
block
.

IGNITION
SYSTEM
SERVICE

120-
6



IGNITION
SYSTEM

Crankshaft
position/rpm
sensor,

testing
and
replacing
(front
mounted)

1
.
Disconnect
sensor
harness
connector
.

2
.
Using
a
digital
multimeter,
check
resistance
between
terminals
1
and
2
in
connector
.
See
Fig
.
10
.

n1
n2n3

Fig
.
10
.
Crankshaft
position/rpm
sensorconnector
.

Crankshaft
positionlrpm
sensor
specifications

"
Coil
resistance
(approx
.)
terminais
1
and
2
....
.
..
...
....
1280
±
10%
ohms

"
Air
gap
(sensor
distance
from
toothed
wheel)
..
.
.
........
.1
.0
±
0
.3
mm
(0
.04
±
0
.01
in
.)

3
.
If
the
resistance
is
not
correct,
the
sensor
is
faulty
and
should
be
replaced
.

NOTE
-

When
installing
the
new
sensor,
be
sure
thewiring
Is
rerouted
in
the
same
orientation
.
Secure
the
sensor
us-
ing
new
wire
ties
.

Tightening
Torque

"
Crankshaft
position/rpm
sensor
to
mounting
bracket
.........
.
.
5
t
1
Nm
(62
t
9
in-lb)

Crankshaft
position/rpm
sensor,



4
.
Installation
is
reverse
of
removal
.
Use
a
new
O-ring
replacing
(rear
mounted)



when
installing
sensor
.
Be
sure
wiring
is
rerouted
in
same
orientation
.
1
.
Disconnect
sensor
harness
connector
.

6502AGN56

2
.
Locatesensor
on
rear
left
sideof
cylinder
block
.
Re-
move
sensormounting
bolt
and
remove
sensorfrom
cylinder
block
.

IGNITION
SYSTEM
SERVICE

3
.
Installation
is
reverse
of
removal
.
Use
a
new
O-ring

when
installing
sensor
.
Be
sure
wiring
is
rerouted
in
same
orientation
.
Secure
sensor
using
new
wire
ties
.

NOTE-

It
may
be
easier
to
remove
the
sensor
working
from
the
underside
of
the
vehicle
.

Camshaft
Position
(CMP)
Sensor

The
camshaft
position
(CMP)
sensor
is
usedby
the
engine
management
system
for
sequential
fuel
injection
and
knock
control
.

Camshaft
position
(CMP)
sensor,

replacing
(4-cylinder
engine)

1
.
Remove
CMP
sensorfromtop
timing
cover,
just
above
coolantthermostat
housing
.
See
Fig
.
11
.

Fig
.
11
.
Camshaft
position
sensor
mounting
bolt
(arrow)
.
M42
engine
shown
.

2
.
On
M42
engines
to
9/93
:
Disconnect
CMP
harness
plug
just
above
oil
filter
housing
.

3
.
On
M42
from9/93
and
all
M44
engines
:
Remove
upper
intake
manifold
as
described
in
113
Cylinder
Head
Re-
moval
and
Installation
.
Then
unplug
CMP
sensor
har-
ness
connector
below
manifold
.

Camshaft
position
(CMP)
sensor,

replacing
(6-cylinder
engine)

1
.
Remove
plastic
cover
from
above
fuel
injectors
.

2
.
Disconnect
harness
connector
from
VANOS
solenoid

and
unscrew
solenoid
from
VANOS
control
unit
.
Re-



"
Clean
contactsurface
on
engine
block
before
fnstall

move
oil
supply
line
from
VANOS
control
unit
.
See
117



ing
knock
sensors
.

Camshaft
Timing
Chain
.

3
.
Remove
camshaft
position
(CMP)
sensor
from
left
frontof

cylinder
head,
next
to
top
of
oil
filter
housing
.



"
Knock
sensor
to
cylinder
block
....
20
Nm
(15
ft
.
lbs
.)

4
.
Disconnect
CMP
sensor
harnessfrom
under
intake

manifold
.

5
.
Installation
is
reverse
of
removal
.
Use
a
new
O-ring

when
installing
sensor
.
Be
sure
wiring
is
rerouted
in

same
orientation
.

Tightening
Torques

"
CMP
sensor
to
cylinder
head
....
.
.
..
5
Nm
(3
.5
ft-Ib)

"
VANOS
oil
supply
pipe
to

VANOS
control
unit
...........
.
..
32
Nm
(24
ft-Ib)

"
VANOS
solenoid
to
VANOS

control
unit
...
.
.................
30
Nm
(22
ft-Ib)

Knock
sensors,
replacing

Knock
sensors
are
usedon
engines
with
Bosch
DME
M1
.7,

Bosch
DME
M3
.3
.1,
Bosch
DME
M5
.2,
and
Siemens
MS
41
.1

engine
management
systems
.
The
knocksensors
are
bolted
to
the
left
sideof
the
cylinder
block
and
monitor
the
combus-

tion
chamber
for
engine-damaging
knock
.
If
engine
knock
is

detected,
the
ignition
point
is
retarded
accordingly
via
the
en-

gine
control
module
.

CA
UTION-

"
Label
knock
sensorharness
connectors
before

disconnecting
them
.
The
connectors
must
not
be

interchanged
.
Engine
damage
may
result
if
the
sensors
are
monitoring
the
wrong
cytinders
.

"
Note
the
installed
angle
of
the
knock
sensoron
the

block
before
removing
it
.
Reinstall
the
sensor
in

the
same
position
.
Be
sure
to
usea
torque
wrench

when
tightening
the
sensormounting
bola

NOTE
-

"
On
M52
engines,
a
single
harness
connects
the
twosensors
to
the
main
harness
connector
.
The
shorter
cable
lead
fs
for
the
knock
sensor
for
cytinders
4,
5,
and
6
.

Tightening
Torque

IGNITION
SYSTEM



120-
7

0012730

Fig
.
12
.
Knock
sensor
mounting
bolt
on
front
left
side
of
cylinder

block
.

NOTE-

Knock
sensor
function
Is
monitoredby
the
On-Board
Diagnostic
system
.
If
a
knock
sensor
is
detected
to
be
faulty,
an
appropriatediagnostic
trouble
code
(DTC)
may
be
stored
in
memory
.
See
100
Engine-General
for
information
on
retrieving
DTCs
.

On
6-cylinder
engines,
the
knock
sensors
are
accessible
af-
ter
removing
the
intake
manifold
.
On
4-cylinder
engines,
the

upper
section
of
the
intake
manifold
should
be
removed
to
ac-

cess
the
sensors
.
See
Fig
.
12
.
NOTE-

Intakemanifold
removal
and
installation
procedures
are



"
Cylinder
no
.
1is
at
the
front
of
the
engine
.

covered
in
113
Cylinder
HeadRemoval
and
Installation
.

Ignition
Firing
Order

Ignition
Firing
Order

"
4-cylinder
engines
.....
..
...
.
..........
.1-3-4-2

"
6-cylinder
engines
...........
..
.
.
..
..
1-5-3-6-2-4

IGNITION
SYSTEM
SCHEMATICS

Fig
.
13
through
Fig
.
17
show
ignition
system
schematics

usedon
the
enginescoveredby
this
manual
.

IGNITION
SYSTEM
SCHEMATICS