NOTE-
Use
a14
mm
or17
mm
alíen
bit
socket
to
remove
the
drain
plug
.
"
If
thecar
is
raised
in
the
air,
it
shouldbe
leve¡
.
Fuel
tank
and
fuel
fines,
inspecting
0012474
Inspect
the
fuel
tank,
fuel
lines,
and
fuel
system
for
damage
or
leaks
.
Check
for
fuel
leaks
in
the
engine
compartment
or
fuel
odors
in
the
passenger
compartment
.
Check
for
faultyfuel
lines
bybending
them
.
If
any
leaks
are
present,
fuel
should
be
expelled
.
Check
for
any
evaporative
emissions
hoses
that
may
have
become
disconnected,
checking
carefully
at
the
charcoal
canister
and
evaporative
emissionspurge
system
.
See130
Fuel
Injection
and
160
Fuel
Tank
and
Fuel
Pump
for
component
locations
and
additional
information
.
WARNING
-
When
checking
for
fuel
leaks,
the
engine
must
be
cold
.
A
hot
exhaust
manifold
or
exhaust
system
could
cause
the
fuel
to
ignite
or
explode
causing
se-
rious
personal
injury
.
Uentilate
the
workarea
and
clean
up
spilled
fuel
immediately
.
Clutch
fluid,
checking
The
hydraulic
clutch
and
the
brake
system
share
the
same
reservoir
and
the
same
brake
fluid
.
Clutch
fluid
leve¡
and
brake
fluid
level
are
checked
at
the
same
time
.
See340
Brakes
for
more
information
.
See210
Clutch
for
information
on
the
clutch
and
the
hydraulic
clutch
operating
system
.
MAINTENANCE
PROGRAM
020-19
Drive
axie
joint
boots,
inspecting
100
Engine-General
The
protective
boots
must
be
closely
inspected
for
cracks
andany
other
damage
that
will
allow
contaminants
to
get
ínto
the
joint
.
If
the
rubber
boots
faf
,
the
water
and
dirt
that
enter
the
joint
will
quickly
damage
¡t
.
Replacement
of
the
drive
axle
joint
boots
and
inspection
of
the
joints
are
described
in
330
Rear
Suspension
.
BODY
AND
INTERIOR
MAINTENANCE
Windshield
Wiper
Biade
Maintenance
Common
problems
with
the
windshield
wipers
include
streaking
or
sheeting,
water
drops
after
wiping,
and
blade
chat-
ter
.
Streaking
is
usually
caused
when
wiper
blades
are
coated
with
road
film
or
car
wash
wax
.
Clean
the
blades
using
soapy
water
.
If
cleaning
theblades
does
not
cure
the
problem
then
they
should
be
replaced
.
BMW
recommends
replacing
the
wip-
er
blades
twice
a
year,
before
and
after
the
cold
season
.
Onold-
er
cars,
check
the
tension
spring
that
holds
the
wiper
to
the
glass
.
Replace
the
wiper
arm
if
the
springs
are
weak
.
Drops
that
remainbehind
after
wipingare
caused
by
oil,
road
film,
or
diesel
exhaust
coating
the
windshield
.
Use
an
alcohol
or
ammonia
solution,
or
a
non-abrasive
cleanser
to
clean
the
windshield
.
Wiper
blade
chatter
may
be
caused
by
dirty
or
worn
blades,
bya
dirty
windshield,
or
by
bentor
twisted
wiper
arms
.
Clean
the
blades
and
windshield
as
described
above
.
Adjust
the
wiper
arm
so
that
there
is
even
pressure
along
the
blade,
and
so
that
the
blade
is
perpendicular
to
the
windshield
atrest
.
Lubricate
the
wiper
linkage
with
a
light
oil
.
The
linkage
is
located
under
the
hood
on
the
drivers
side
.
If
the
problem
persists,
theblades
are
excessively
aged
or
worn
and
should
be
replaced
.
See
611
Wipers
and
Washers
.
Body
and
hinges,
lubricating
The
door
locks
and
lock
cylinders
canbe
lubricated
with
an
oil
that
contains
graphite
.
The
body
and
door
hinges,
the
hood
latch,
and
the
door
check
rods
should
be
lubricated
with
SAE
30
or
SAE
40
engine
oil
.
Lubricate
the
seat
runners
with
multipurpose
grease
.
Do
not
apply
any
oil
to
rubber
parts
.
If
door
weatherstrips
are
sticking,
lubricate
them
with
silicone
spray
or
talcum
powder
.
The
hood
release
cable
should
be
lubricated
as
well
.
The
use
of
winter
lock
de-icer
spraysshould
be
kept
to
an
ab-
solute
minimum,
as
the
alcohol
in
the
de-icer
will
wash
the
grease
out
of
the
lock
assemblies,
and
may
cause
the
locks
to
corrode
internally,
or
become
difficult
to
operate
.
ENGINE-GENERAL
100-1
11
.
Detach
wiring
harness
duct
at
rear
bulkhead
panel
and
pull
complete
duct
forward
and
up
to
allow
access
to
rear
of
cylinder
head
cover
.
12
.
Remove
spark
plugs
and
spark
plugwire
loom
.
"
Remove
plastic
cover
from
top
of
cylinder
head
.
"
Disconnect
spark
plug
wires
fromspark
plugs
and
re-
move
spark
plugs
.
"
Unbolt
spark
plug
cable
harness
and
heat
shield
from
right
side
of
cylinder
head
cover
and
set
aside
.
13
.
Unscrew
andremove
cylinder
head
cover
cap
screws
and
remove
cover
.
See
Fig
.
5
.
CAUTION-
Two
of
the
cover
hold-down
screws
are
under
the
spark
plug
cable
duct
.
NOTE-
Make
note
of
the
arrangement
of
cap
screws,
washers
and
rubber
grommets
holding
the
cylinder
head
cover
in
place
.
Fig
.
5
.
Cylinder
head
cover
mounting
points
(arrows)
.
Fig
.
7
.
M44
fuel
rail
air
connection
(A)
and
fuel
supply
and
return
lines
Intake
manifold,
removing
(B)
.
14
.
On
late
engines,
disconnect
injector
air
shrouding
hose
from
fitting
at
center
of
upper
intake
manifold
.
18
.
Disconnect
fuel
supply
and
return
lines
from
fuel
rail
.
15
.
Remove
upper
section
of
intake
manifold
.
"
Disconnect
ali
cables
harness
connectors
from
throttle
housing
and
intake
manifold
.
"
Disconnect
fuel
tank
vent
hose
fromvent
valve
on
low-
er
sitie
of
manifold
.
"
Remove
manifold
support
brackets
.
See
Fig
.
6
.
"
Remove
upper-to-lower
manifold
fasteners
(1
bolt,
2
nuts)
and
separate
upper
manifold
from
lowermani-
fold
.
Note
locating
dowei
sleeves
on
lower
to
upper
manifold
mounting
studs
.
Remove
dowels
and
set
aside
.
See
Fig
.
8
.
CYLINDER
HEAD
REMOVAL
AND
INSTALLATION
113-3
0012686
Fig
.
6
.
Intake
manifold
support
brackets
and
mountinghardware
.
Manifold
for
M44
engine
shows
.
16
.
Disconnect
oil
dipstick
tube
bracket
from
lower
manifold
section
.
17
.
On
M44
engine,
relieve
fuel
pressure
using
com-
pressed
air
(maximum
3
bar
pressure)
at
schroeder
valve
on
fuel
rail
.
Briefly
apply
air
pressure
to
force
fuel
back
intofuel
tank
.
See
Fig
.
7
.
WARNING
-
"
The
fuel
system
retains
fuel
pressure
when
the
engine
is
off
(up
to
75
psi)
.
Use
care
when
dis-
connecting
fuel
lines
.
Unscrew
the
fuel
tank
cap
to
retease
pressure
in
the
tank
.
Wrap
a
clean
shop
towel
around
the
fitting
when
loosening
.
"
Fuel
is
highly
flammable
.
When
working
around
fuel,
do
not
disconnect
any
wires
that
could
cause
electrical
sparks
.
Do
not
smoke
or
worknear
heaters
or
other
tire
hazards
.
Placea
tire
extin-
guisher
in
the
vicinity
of
the
work
area
.
19
.
Disconnect
coolant
hoses
from
vent
valve
on
lower
intake
manifold
.
Remove
crankcase
vent
valve
from
manifold
.
CYLINDER
HEAD,
4-CYLINDER
7
.
Lightly
lubricate
new
cylinder
head
bolts
.
Loosely
instan
bolts
and
their
washers,
then
thread
them
in
until
they
are
finger
tight
.
NOTE-
Check
that
all
washers
for
the
cylinder
head
bolts
are
in
place
before
installing
the
bolts
.
8
.
Tighten
cylinder
head
bolts
in
correct
sequence
.
See
Fig
.
17
.
UU125U2
Fig
.
17
.
Cylinder
head
bolt
tightening
sequence
for
4-cylinder
en-
gines
.
Note
oil
supply
tube
seal
(arrow)
on
M44
engine
.
WARNING
-
The
bolts
should
be
tightennd
in
three
stages
as
líst-
ed
below
.
The
final
stages
require
the
use
of
a
spe-
cial
tool
(BMW
tool
No
.
11
2
110)
ora
suitable
protractor
to
tighten
the
bolts
to
a
specified
torqueangle
.
See
Fig
.
18
.
Tightening
Torques
"
Cylinder
head
to
engine
block
(Torx
El2
M10
bolts)
Stage
1
.
.
.....
.
.
.............
30
Nm
(22
ft-Ib)
Stage
2
.
...
...
.
.
...................
..
.
+90°
Stage
3
.....
...
.
..
...................
..
+90°
9
.
Carefully
rotate
crankshaft
in
direction
of
engine
rota-
tion
and
lock
it
at
TDC
by
inserting
BMW
special
tool
no
.
11
2
300
through
transmission
bellhousing
.
See
Fig
.
19
.
CYLINDER
HEAD
REMOVAL
AND
INSTALLATION
113-
7
Fig
.
18
.
Protractor
and
pointer
being
used
to
tighten
bolts
to
specified
torqueangle
(6-cylinder
engine
shown)
.
Fig
.
19
.
BMW
special
tool
11
2
300
inserted
through
bellhousing
hole
and
finto
flywheel
(arrow)
to
lockcrankshaft
at
TDC
.
10
.
Turn
left
chainguide
adjusting
sleeve
in
until
it
just
con-
tacts
the
cylinder
head
(See
Fig
.
14
.)
.
Insert
chain
guide
retaining
screw
and
tighten
.
CAUTION-
11
.
Placechain
sprockets
with
chains
oncamshaftsso
that
Be
sure
timing
chain
does
not
bind
oncrank
gear
when
turning
crankshaft
.
arrowson
sprockets
point
up
and
elongated
holes
in
sprocketsare
centered
to
tapped
holes
in
camshafts
.
See
Fig
.
20
.
CYLINDER
HEAD,
4-CYLINDER
113-8
CYLINDER
HEAD
REMOVAL
AND
INSTALLATION
IW?
-
L
'/~f
W
~
4r
"
-
"
;,s
1
12
.
On
M44
engine
:
Place
sensor
wheel
on
intake
cam-
shaft
sprocket
so
that
arrowon
sensor
wheel
points
up
.
13
.
Instan
and
hand-tighten
sprocket
mounting
bolts
.
CAUTION-
Different
hydraulic
chaintensioners
were
used
during
manufacture,
depending
onengine
type
.
See
Fig
.
21
.
Note
that
the
late
style
tensioner
can
be
retrofitted
to
the
earlier
engine,
so
be
sure
to
identify
the
version
of
tensioner
installed
as
insta-lation
instructions
vary
between
the
two
.
14
.
On
M42
engine
:
Disassemble
chain
tensioner
by
strik-
ing
outer
sleeve
against
a
solid
object
.
This
will
release
snap
ring
and
tensioner
will
separate
.
See
Fig
.
22
.
M42
Engine
up
and
camshaft
threaded
holes
centered
in
siotted
holes
.
CYLINDER
HEAD,
4-CYLINDER
0013024a
Outer
sl
eve
Detent
ring
Spri
g
Fig
.
22
.
Disassembled
chain
tensioner
for
M42
engine
.
15
.
On
M42
engine
:
Clamp
tensioner
piston
in
vice
(soft
jaws)
.
Slowly
compress
piston,
making
sure
detent
ring
fits
into
taper
of
outer
sleeve
.
If
necessary,
press
ends
of
detent
ring
together
.
Slowly
continuepressing
ten-
sioner
together
until
snap
ring
audibly
clicksinto
outer
sleeve
.
Measure
overall
lengthof
tensioner
to
confirm
correct
assembly
:
68
.5
mm
(2.7
in
.)
.
NOTE-
i
Snap
ring
/0
.13024
The
late-style
tensioner
on
the
M44
engíne
canbe
ret-
rofitted
to
the
M42
engine
.
Tightening
Torque
"Chain
tensioner
plug
to
cylinder
head
.....
.-~
..........
40
Nm
(30
ft-Ib)
16
.
On
M44
engíne
:
Clamp
tensioner
píston
in
vice
(soft
jaws)
and
squeeze
oil
from
it
.
Slowly
compress
piston
only
up
to
end
circlip
.
Repeat
procedure
twice
to
ensure
all
oil
is
expelled
.
See
Fig
.
23
.
17
.
Instan
hydraulic
chain
tensioner
to
cylinder
head
.
Use
a
new
sealing
washer
on
tensioner
when
installing
.
18
.
On
M42
engine
:
Unlock
chain
tensioner
by
pressing
chain
rail
against
tensioner
until
it
expands
out
.
19
.
Check
that
chain
is
free
of
slack
.
Tighten
sprocket
mounting
bolts
.
Fig
.
21
.
Two
versions
of
hydraulic
chain
tensioners
.
Original
chainten-
sioner
on
M42
engine
(top)
can
be
disassembled
.
Chain
ten
sioner
on
M44
engine
(bottom)
cannotbe
disassembled
.
Tightening
Torque
Note
differences
in
outer
sleeve
.
Also,
the
M42
tensioner
de-
"
Chain
sprocket
to
camshaft
flange
.
..
10
Nm
(89
in-lb)
tent
ring
groove
(arrow)
is
visible
when
tensioner
is
extended
.
20
.
Remove
crankshaft
locking
tool
from
bellhousing
and
camshaft
locking
tool
from
rear
of
cylinder
head
.
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
NOTE-
Cylinder
head,
installing
(6-cylinder
engine)
CAUTION-
If
the
camshafts
were
removed
and
installed
while
the
cylinder
head
was
off,
a
minimum
waiting
time
is
required
after
ínstalling
the
camshafts
.
When
the
camshaftsareremoved,
the
hydraullc
lifters
can
expand
.
This
expansion
can
cause
increased
valve
lift
when
the
camshafts
are
bolted
down,
re-
sulting
in
open
valves
.
Cylinder
head
installation
waiting
times
"
68°F
(20°C)
and
higher
.
.
.
..
..........
10
minutes
"
50-68°F
(10-20°C)
........
..
.........
30
minutes
"
32-50°F
(0-10
°C)
.........
...
........
75
minutes
CYLINDER
HEAD
REMOVAL
AND
INSTALLATION
113-
1
5
1
.
Clean
cylinder
head
and
gasket
surfaces
of
cylinder
block
and
al¡
timing
chain
covers
.
"
Remove
all
foreign
matter
and
any
¡¡quid
from
bolt
holes,
then
clean
with
a
thread
chaser
.
CA
UTION-
Do
not
use
ametal
scraper
or
wire
brush
to
clean
the
aluminum
cylinder
head
or
pistons
.
If
neces-
sary,
use
a
hard
wooden
or
plastic
scraper
.
Also
available
are
abrasive
discs
to
be
used
in
conjunc-
tion
with
an
electric
drill
.
Be
sure
to
use
the
correct
disc
for
the
typeof
metal
being
cleaned
.
2
.
Check
gasket
surface
of
cylinder
head
and
cylinder
block
for
warpage
using
a
straight
edge
.
NOTE-
Fig
.
40
.
Cylinder
head
bolt
loosening
sequence
.
If
the
cylinder
head
has
been
machined,a
special
0
.3
mm
thickergasketshould
be
installed
.
The
thickergas-
ket
is
available
from
an
authorized
BMW
dealer
.
BMW
special
tool
no
.
112250
is
a
thin-walled
Torx
E12
socket
wíth
anextended
reach
.
The
cylinder
head
bolts
3
.
Place
new
cylinder
head
gasket
on
cylinder
block
.
are
recessed
finto
the
head
below
the
camshaft
towers
Check
that
two
locating
dowels
are
correctly
positioned
wíth
liffle
working
space
.
in
block
and
arenot
damaged
.
36
.
Remove
crankshaft
locking
tool
(BMW
special
tool
no
.
NOTE-
11
2
300)
.
Using
the
crankshaft
vibration
damper
bolt,
The
word
"OBEN",
printed
on
the
gasket,
should
face
turn
engine
opposite
its
normal
direction
of
rotation
up
.Thecylinderheadgasketwillfitcorrectlyinonlyone
(counterclockwise
asviewed
from
the
front)
approxi-
orientation
.
mately
45°
.
This
prevents
accidental
contact
between
valves
and
pistons
during
installation
.
4
.
With
camshafts
locked
in
TDC
positionwith
BMW
spe-
cial
tools
as
described
earlier,
set
cylinder
head
in
po
NOTE-
sition,
guiding
primary
chain
through
cylinder
head
Guide
cam
chain
to
keep
it
from
jamming
when
turning
opening
.
the
crankshaft
.
CA
UTION-
"
The
camshafts
must
be
locked
in
the
MC
posi-
tion
at
the
rear
of
the
cylinder
head
with
BMW
special
tool
no
.
113240
before
installing
the
cyl-
inder
head
.
"
Make
sure
the
crankshaft,
which
had
been
rotat-
ed
approximately
45°
opposite
thedirection
of
engine
rotation,is
still
in
that
position
before
low-
ering
the
cylinder
head
into
position
.
5
.
Lightly
lubricate
new
cylinder
head
bolts
.
Loosely
instan
bolts
and
their
washers,
then
thread
them
in
until
they
are
finger
tight
.
Install
cylinder
head-to-lower
timing
chaincover
boitsfinger
tight
.
CAUTION-
Tonc-type
cylinder
head
bolts
should
not
be
re-
used
.
They
are
stretch-typebolts
and
must
always
be
replaced
whenever
loosened
.
CYLINDER
HEAD,
6-CYLINDER
113-16
CYLINDER
HEAD
REMOVAL
AND
INSTALLATION
NOTE-
Check
that
all
washers
for
the
cylinder
head
bolts
are
in
place
before
installlng
the
bolts
.
Some
of
the
washers
may
be
staked
to
the
cylinder
head
.
6
.
Tighten
cylinder
head
bolts
in
correct
sequence
.
See
Fig
.
41
.
Fig
.
41
.
Cylinder
head
bolt
tightening
sequence
for
M50
engine
.
Fig
.
42
.
Protractor
and
pointer
being
used
to
tighten
bolts
to
specified
torque
angle
.
WARNING
-
The
bolts
should
be
tightened
in
three
stages
as
list-
ed
below
.
The
final
stages
require
the
use
of
aspe-
cial
tool
(BMW
tool
No
.
11
2
110)
ora
suitable
protractor
to
tighten
the
bolts
to
a
specified
torque
angle
.
See
Fig
.
42
.
CYLINDER
HEAD,
6-CYLINDER
7
.
Install
and
tighten
cylinder
head-to-lower
timing
chain
cover
bolts
.
Tightening
Torques
"
Cylinder
head
to
engine
block(Torx
El
2
Ml
0
bolts)
Stage
1
.........
..
.
.
.
...
.
...
..
30
Nm
(22
ft-Ib)
Stage
2
.........
..
..
....
.
...
..........
+90°
Stage
3
...
.
.....
..
.
.
.
...
.
...
..........
.+90°
"
Cylinder
head
lo
lower
timing
chaincover
.......
..
..
..
...
.
....
10
Nm
(89
in-lb)
8
.
Carefully
rotate
crankshaft
in
direction
of
engine
rota-tion
and
lock
it
at
TDC
by
inserting
BMW
special
tool
no
.
11
2
300
through
transmission
bellhousing
.
Guide
primary
timing
chain
to
keep
it
from
jamming
on
crank
gear
.
9
.
Mount
primary
chain
sprocketto
primary
chain
so
that
arrowon
sprocket
faces
up
.
Mount
sprocket
to
exhaust
camshaftso
tapped
holes
in
camshaft
are
on
left
most
side
of
elongated
holes
in
sprocket
.
See
Fig
.
43
.
Fig
.
43
.
Primary
chain
sprocket
correctly
afgned
to
exhaust
cam-
shaft
.
Camshaft
holes
should
be
on
left
most
sideof
sprocket
holes
.
10
.
Install
timing
chain
guide
and
secondary
chain
tension-er
.
Tighten
mounting
bolts
.
11
.
Install
asan
assembly,
secondary
chain
sprockets
and
chain
so
that
arrow(s)
on
sprockt(s)
are
pointing
up
.
Centermounting
holes
in
sprockets
tobolt
holes
in
camshafts
.
See
Fig
.
44
.
12
.
Install
thrust
washers
and
spring
plate
(if
applicable)
to
sprockets
.
See
Fig
.
45
.