Hand BMW 318i 1995 E36 User Guide

020-
4



MAINTENANCE
PROGRAM

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Maintenance
ítem



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3



c

Engine
compartment
maintenance

Change
oil
and
oil
filter

Check
fluid
levels
(coolant,steering,
brake/clutch,
ATF)

Under
car
maintenance

Check
steeringrack
and
steeringlinkages
for
leaks
andexcess
play
.
Repair
Group
320

Inspect
brake
system
.
Check
brake
calipers,
rotors,
and
brake
pad
thíckness
.
Inspect
for
dam-
aged
hoses
and
lines,
leaks
or
damage
.
Check
hand
brake,adjust
cable
if
necessary
.
Repair
Group
340

Check
and
adjust
tire
pressures,
including
spare

Body
and
interior
maintenance

Check
operation
of
exterior
and
interior
lights,
including
glove
box
light,
engine
compartment
light,
trunk
light,
instrument
panel
lights,
horns,
headlight
flasher
anddimmer
switch
.
Check
headlight
and
driving
light
aiming
.
6
Electrical
System

Check
function/condition
of
seat
belts
.
Repair
Group
720

Check
windshield
washer
fluid
level
and
concentration,
add
as
necessary
.
Check
operation
of
washer
system
.
Check
condition
of
wiper
blades
.
Repair
Group
611

Road
Test

Check
braking
performance,
steering,
heating
and
ventilation,
manual
or
automatic
transmis-
sion,
and
mirrors

Service
Interval
Reset

Reset
service
indicator
using
specialreset
tool
.

MAINTENANCE
TABLES

Table
a
.
Oil
Service

Final
Drive
Gear
Oil

BMW
recommends
using
only
a
specially
formulatedsyn-
thetic
gear
oil
that
is
available
through
an
authorized
BMW
dealer
parts
department
.
For
additional
information
on
this
¡u-
bricant
andany
other
lubricants
that
may
be
compatible,
con-
tact
an
authorized
BMW
dealer
senrice
department
.
See
331
Final
Drive
.

Brake
Fluid

Brake
fluid
absorbs
moisture
easily,
and
moisture
in
the
fluid
affects
brake
performance
and
reliability
.
This
is
why
brake
fluid
should
be
flushed
from
the
system
every
two
years
.
When
re-
placing
or
adding
brake
fluid,
use
only
new
(luid
from
previously
unopened
containers
.
Do
not
use
brake
fluid
that
has
been
bled
from
the
system,
even
ifit
is
brand
new
.
Use
only
DOT
4
brake
fluid
.
See340
Brakes
for
more
information
.

Engine
Coolant
(Anti-freeze)

BMW
recommends
coolant
that
is
a
50/50
mixture
of
distilled
water
and
phosphate/nítrate
freeanti-freeze
containing
ethyl-
ene
glycol
.
Anti-freezeraises
the
boiling
point
and
lowersthe
freezingpoint
of
the
coolant
.
It
alsocontains
additives
that
help
prevent
cooling
system
corrosion
.

Power
Steering
Fluid

The
power
steering
fluid
is
Dexron
II]®
ATF,
or
equivalent
.

The
system
is
permanently
filled
and
does
not
have
a
drain
.
Routinely
adding
ATF
is
not
required
unlessthe
system
is
leak-
i
n
g,

WARNING
-

Be
sure
to
check
the
fluid
specifications
on
the
pow-
er
steering
reservoir
to
confirm
the
fluid
type
in-
stalled
in
the
system
.
In
some
instances,
the
power
steering
system
may
be
filled
with
an
alternative
hy-
draulic
fluid
designated
CHF
7
.1
.

MAINTENANCE
PROGRAM
020-

ENGINE
OIL
SERVICE



Engine
oil
and
fiiter,
changing

Fig
.
3
.



Engine
oil
level
dipsticklocation
on
4-cylinder
engine
(arrow)
.
Dipsfck
is
marked
with
mínimum
and
maximum
level
marks
.

Fig
.
4
.



Oil
filler
cap
(arrow)
.
6-cylinder
engine
shown
.
0012202

Engine
oii,
checking
leve¡



A
complete
oil
change
requires
new
oil
(see
Table
e),
a
new
oil
filter
insert
kit,
and
a
new
drain
plug
sealing
washer
.
The

The
engine
oil
leve]
is
checked
with
a
dipstick
in
the
engine



tools
needed,
a
drain
plug
socket
or
box
wrench
(17
mm
or19

block
.
Check
the
oii
leve¡
with
the
canon
a
level
surface,
after



mm)
and
a
drain
pan
(8-10
US
qt
.
capacity),
are
described
in

the
engine
has
been
stopped
for
atleast
a
few
minutes
.
Check



010
Fundamentals
for
the
Do-It-Yourself
Owner
.

the
leve¡
by
pulling
outthe
dipstick
and
wiping
it
clean
.
Reinsert

it
all
the
way
and
withdraw
it
again
.
The
oil
leve¡
is
correct
if
it
is



NOTE-
between
the
two
marks
near
the
end
of
the
stick
.
See
Fig
.
3
.



If
using
a
"fast-lube"
service
facility
for
oil
changes,
make
sure
the
technician
hand-starts
and
torques
the
Add
oil
through
the
filler
cap
on
thetop
of
the
cylinder
head
.



engine
oil
drain
plug
using
hand-tools
.
Power
tools
can
See
Fig
.
4
.
Add
only
the
amount
needed
to
bring
the
oil
leve¡to



strip
the
threads
of
the
plug
and
the
oil
pan
.

the
MAX
mark
on
the
dipstick,
using
an
oil
of
the
correctviscos-
ity
andgrade
.
Too
much
oil
canbe
just
as
harmful
as
too
little
.

ENGINE
OIL
SERVICE

020-
1
0



MAINTENANCE
PROGRAM

1.
Run
engine
for
afewminutes
to
warm
engine
oil
.
Shut



5
.
When
oil
flow
has
diminished
to
an
occasional
drip,
re-

engine
off
.



install
drain
plugwith
a
new
metal
sealing
washerand

torque
plug
.

2
.
With
car
on
level
ground,
place
drain
pan
under
oil
drain

plug
.
See
Fig
.
5
.



Tightening
Torques

"
Engine
oil
drain
plug

M12
bolt
(17mm
wrench)
.
...
.
..
.
25
Nm
(18
ft-Ib)



-

M22
bolt
(19mm
.
wrench)
...
.
...
.
60
Nm
(44
ft-Ib)

Fig
.
5
.



Engine
oil
drain
plug(arrow)
in
oil
pan
.

3
.
Remove
filter
housingcover
.
Remove
filter
cartridge

and
discard
any
O-rings
.
See
Fig
.
6
.

CAUTION-

Pulí
the
loose
plug
away
from
the
hole
quickly
to
avoidbeing
bumed
by
hot
oil
.
It
wíll
runout
quickly
when
the
plug
ís
removed
.
If
possible,
use
gloves
to
protect
your
hands
.

ENGINE
COMPARTMENT
MAINTENANCE

0012460

Fig
.
6
.



Engine
oil
filter
cartridge
.
Note
O-ring
locations
when
removing
cover
and
filter
.

4
.
Using
a
socket
or
box
wrench,
loosen
drain
plug
at
oil

drain
pan
.
By
hand,
remove
plug
and
letoil
drain
into

pan
.

6
.
Lubricate
and
install
new
O-rings
.
Install
a
new
filter

cartridge
and
housingcover
.
Tighten
cover
.
See
Fig
.
7
.

7



«
a~
.~~
fT~

iII~IIIi~
.

Fig
.
7
.



Oil
flter
housing
on
6-cylínder
engine
.
4-cylinder
engine
is

similar
.

Tightening
Torque

"
Engine
oil
filter
cover
to
oil

filter
housing
...................
25
Nm
(18
ft-Ib)

7
.
Refill
crankcase
with
oil
.'Approximate
oil
capacity
is
list-

ed
in
Tablee
.
Use
dipstick
to
check
correct
oil
level
.

8
.
Start
engine
and
check
that
oil
pressure
warning
light

immediately
goes
out
.

9
.
Allow
engine
to
run
for
a
few
minutes
to
círculate
new

oil,
then
check
for
leaks
at
drain
plug
and
oil
filter
.
Stop

engine
and
reclieck
oil
level
.

ENGINE
COMPAR



ENT
MAINTENANCE

The
information
underthis
heading
describes
routine
mainte-

nance-other
than
oil
change-done
in
the
engine
compart-

ment
.
It
is
not
necessary
for
the
car
to
be
raised
and
supported
off
the
ground
.
Information
on
oil
change
is
given
earlier
under

Engine
Oil
Change
.

020-
1
2



MAINTENANCE
PROGRAM

6-cylinder
engines
use
a
coil-on-plug
configuration,
and
re-



Battery
cablesshould
be
tight
.
The
terminals,
the
cable
moval
of
thetop
engine
cover
(between
the
camshafts)
and
ig-



clamps,
and
the
battery
case
should
be
freeof
the
white
deposits
nition
cofs
are
necessary
.
See
Fig
.
12
.
Blow
away
any
dust
or



that
indicate
corrosion
and
acid
salts
.
Even
a
thin
¡ayer
of
dust
dirt
around
the
ignition
coils,
and
then
remove
the
coils
.
Blow



containing
conductive
acid
salts
can
cause
battery
discharge
.
away
any
dustor
dirt
around
the
sparkplugs
.
Remove
the
spark

plugs
.



To
remove
battery
corrosion,
begin
by
disconnecting
theca-

bles
.
Disconnect
the
negative
(-)
cable
first
.
Clean
the
terminal

posts
and
the
cable
clamps
with
a
wire
brush
.
Clean
the
main
chassis
ground
terminal
next
to
the
battery
.
Corrosion
can
be
washedaway
with
a
baking
soda
and
water
solution
that
will
neutralize
the
acid
.
Apply
the
solution
carefully,
though,since
ít
will
also
neutralize
the
acid
inside
the
battery
.
Reconnect
the
ca-
ble
clamps,
positive
(+)
cable
first
.
Lightly
coat
the
outside
of
the

terminals,
hold
down
screws,
and
clamps
with
petroleum
jelly,
grease,
or
a
commercial
battery
terminal
corrosion
inhibitor
.

Fig
.
12
.
Ignition
coil
being
removed
from
spark
plug
on
M52
engine
.

NOTE-

If
necessary,
see
120
Ignition
System
for
more
details
on
coil
removal
.

B11004

Lightlylubricate
the
new
spark
plug
threads
with
a
small
amount
of
anti-seize
compound
.
Thread
the
plugs
into
the
cyl-
inder
head
byhand
to
prevent
cross-threading
.

Tightening
Torque

"
Spark
plug
to
cylinder
head
.......
25
Nm
(18
ft-ib)

Idie
Speed

Engine
¡dle
speed
canchange
due
to
a
number
of
factors,
in-
cluding
normal
wear
.
The
idle
speed
is
electronically
adaptive
and
non-adjustable
.
See
130
Fuel
Injection
for
more
information
.

Battery,
checking
and
cleaning

The
battery
is
located
in
the
right
side
of
the
luggage
com-
partment
.
Simple
maintenance
of
the
battery
and
its
terminal
connections
will
ensure
maximum
starting
performance,
espe-
cially
in
winter
when
colder
temperaturesreduce
battery
power
.

ENGINE
COMPARTMENT
MAINTENANCE

WARNING
-

"
Prior
to
disconnecting
the
battery,
read
the
bat-
tery
disconnection
cautions
given
at
the
front
of
this
manualonpage
viii
.

"
Battery
acid
is
extremely
dangerous
.
Take
care
to
keep
it
from
contacting
eyes,
skin,
or
clothing
.
Wear
eye
protection
.
Extinguish
all
smoking
ma-
terials
and
do
not
worknear
any
oyen
flames
.

Battery
electrolyte
should
be
maintained
at
the
correct
level
just
above
the
battery
plates
and
their
separators
.
The
correct
leve¡
is
approximately
5
mm
(
1
/4
in
.)
above
thetop
of
battery
plates
orto
thetop
of
the
indicator
marks
(if
applicable)
.
The
battery
plates
and
the
indicator
marks
can
beseen
once
the
fill-
er
caps
are
removed
.
If
the
electrolyte
level
is
low,
replenish
it
by
adding
distilled
water
only
.

Battery,
repiacing

Batteries
are
rated
by
ampere
hours
(Ah),
the
number
of
hoursa
specific
current
draín
can
be
sustained
before
complete
discharge,
or
by
cold
cranking
amps
(CCA),
the
number
of
amps
available
to
crank
the
engine
in
cold
weather
conditions
.
In
general,
replacement
batteries
should
alwaysbe
rated
equal
or
higherthan
the
original
battery
.

CAUTION-

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

The
battery
is
held
in
place
bya
single
hand
screw
and
píate
.
A
secure
battery
hold-down
is
important
in
order
to
prevent
vi-
brations
and
road
shock
from
damaging
the
battery
.

NOTE-
NOTE-
"
Always
disconnect
the
negative
()
cable
first,
and
Design
characteristics
of
the
convertible
body
cause
vi-



connect
ft
last
While
changing
batteries,
clean
away
brations
in
the
trunk
area
.
Therefore,
E36
convertibles



any
corrosion
in
or
around
the
battery
tray
.
require
a
specialbattery
designed
for
constant
vibra-
tion
.
When
repiacing
the
battery,
be
sure
the
replace-



"
Design
characteristics
of
the
convertible
body
cause
ment
is
designed
specffically
for
the
convertible
.



vibrations
to
oscillate
in
the
trunk
area
.
Therefore,
the
convertible
model
uses
a
specialbattery
designed
for
this
constant
vibration
.

020-
1
4



MAINTENANCE
PROGRAM

uu11989

Fig
.
14
.
Engine
drive
belt
tensíoner
being
released
on
late
4-cylinder
engine
.
Pry
off
tensioner
cover
and
then
lever
tensioner
in
clockwise
direction
(as
facing
engine)
and
slip
beltoff
pulleys
.



Fig
.
17
.
Engine
drive
belt
routing
for
late
4-cylinder
engine
with
poly-
ribbed
drivebelts
.

CA
UTION-

Use
only
BMW
approved
phosphate-free
anti-
freeze
when
filling
the
cooling
system
.
Use
of
anti-

B11177



freeze
containing
phosphates
!s
considerad
to
be

Fig
.
15
.
Engine
drive
belt
tensioner
being
released
on
6-cylinder
en-



harmful
to
the
cooling
system
.

gine
.
Pry
off
tensioner
cover
and
then
lever
tensioner
in
clock-
wise
direction
(as
facing
engine)
and
slipbelt
off
pulleys
.



A
translucent
expansion
tank,
or
overflow
resenroir,
providesmonitóring
of
coolant
leve¡
.
Because
the
expansion
tank
is
translucent,
thecoolant
level
can
be
checked
visually
without
opening
the
system
.
Always
check
thecoolant
leve¡
with
theen-gine
cold
.
The
coolant
leve¡
should
be
at
the
maximum
mark
on
O



o
'~
I



the
expansion
tank,
as
shown
in
Fig
.
18
.

OO



Hose
connectionhld
b
tiht
s
soueg



an
ddry
.
Coolánt
seepage
indicates
either
that
the
hose
clamp
is
loose,
that
the
pose
is

ENGINE
COMPARTMENT
MAINTENANCE

0012470

Fig
.
16
.
Engine
drive
belt
routing
for
6-cylinder
engine
.
A/C
compres-
sor
drive
belt
not
shown
.

'92

irá
Alternator
belt

Coolant~
0
pp



o0o



Belt
tensioner

Cooling
System
Service

0013000

Cooling
system
maintenance
consists
of
maíntaining
thecoolant
leve¡,
inspecting
hoses
.
Because
the
coolant's
anti-cor-

rosion
and
anti-freeze
additives
gradually
lose
their
effective-
ness,
replacement
of
thecoolant
every
two
years
up
to
1996
models,
and
every
three
years
from
1996
is
recommended
.
Asa
preventive
measure,
replacement
of
the
cooling
system
hos-
es
every
four
years
is
also
recommended
.

damaged,
or
that
the
connection
is
dirty
or
corroded
.
Dried
cool-
ant
has
a
chalky
appearance
.
Hoses
should
be
firm
and
springy
.
Replace
any
hose
that
is
cracked,
that
has
become
soft
and
limp,
or
has
been
contaminated
by
oil
.
See
Fig
.
19
.

Power
steering
fluid,
checking
leve¡

Check
the
power
steering
fluid
level
in
the
fluid
reservoir
.
Park
thecar
on
leve¡
ground
with
the
engine
off
.
The
level
is
cor-
rect
if
it
is
between
the
MIN
and
MAX
marks
on
the
dipstick
.
See
Fig
.
20
.
If
the
leve¡
is
below
the
MIN
mark,
start
the
engine
andadd
fluid
to
the
reservoir
to
bríng
the
leve¡
up
.
Stop
the
engine
and
recheck
the
leve¡
.
Hand-tighten
the
reservoir
cap
.

020-
1
6



MAINTENANCE
PROGRAM

Fuel
filter,
replacing

Oxygen
sensor

(regulating)
\
Catalytic



Oxygen
sensor
convertor
(monitoring)

Fig
.
21
.
Typical
1996
and
later
exhaust
system
showing
oxygen
sensor
locations
.

UNDER-CAR
MAINTENANCE

convertor

On
early
4-cylínder
cars,
the
fuel
filter
is
mounted
under
the
caron
the
left
front
bulkhead
.
On
early
6-cylínder
cars,
the
fuel
filter
is
mounted
to
the
front
left
motor
mount
in
theengine
com-
partment
.
See
Fig
.
22
.

0013139
Fig
.
22
.
Fuel
filter
location
(arrow)
on
bulkheadunder
left
side
of
vehi-
cle
.
Filter
for
M42
engine
shown
.

On
later
cars,
the
fuel
filter
is
located
beneath
the
centerof
the
car,
approximately
under
the
driver's
seat
.
See
Fig
.
23
.
A
protective
cover
is
installed
overthe
fuel
filter,
which
must
be
re-
moved
to
access
the
filter
.

UNDER-CAR
MAINTENANCE

Exhaust
flap

actuator

(monitoring)

NOTE-

Drain
the
fuel
filter
trom
the
inlet
side
into
a
container
and
inspect
the
drained
fuel
.
Check
for
rust,
moisture
and
contamination
.

WARNING
-
Fuel
will
be
expelled
when
the
filter
is
removed
.
Do
not
smoke
or
worknear
heaters
or'other
fire
haz-ards
.
Keep
a
tire
extinguisher
handy
.

CAUTION-

Clean
thoroughly
around
the
filter
connections
be-
fore
removing
them
.

0012726
Fig
.
23
.
Fuel
filter
location
under
center
of
car
(arrow)
.
Filter
for
M52
engine
shown
.

Catálytic
\
Oxygen
sensor

When
replacing
the
fuel
filter,
disconnect
the
battery
negative
(-)
cable
and
clamp
the
filter
inlet
and
outlet
hoses
to
lessen
fuel
spillage
.
Loosen
thecenter
clamping
bracket
and
the
two
hoseclampson
either
end
of
the
filter
.
Note
the
arrow
or
mark-
ings
indicating
direction
of
flow
on
the
new
filter
.
Install
the
filter
anduse
new
hose
clamps
.

Tires,
checking
inflation
pressure



Brake
pad/rotor
wear,
checking

Correct
tire
pressuresare
important
to
handling
and
stability,



Al¡
E36
cars
are
fitted
withdisc
brakes
at
al¡
four
wheels
.
See
fuel
economy,
and
tire
wear
.
Tire
pressures
change
with
temper-



Fig
.
24
.
Although
thebrakesare
equipped
with
a
brake
pad
ature
.
Pressures
should
be
checked
often
during
seasonal
tem-



warning
system,
the
system
only
monitors
one
wheel
per
axle
.
perature
changes
.
Correct
inflation
pressures
canbe
found
on



It
is
recommended
that
pad
thickness
should
be
checked
the
driver's
door
pillar
and
in
the
owner's
manual
.
Note
that
tire



whenever
the
wheels
are
off
or
brakework
is
beggg
done
.
pressuresshould
be
higher
when
thecar
is
more
heavily
loaded
.

WARNING
-

Do
not
inflate
any
tire
to
a
higher
pressure
than
the
tiress
maximum
ínflation
pressure
listed
on
the
side-
wall
.
Use
cara
when
addlng
air
to
warm
tires
.
Warm
tire
pressures
can
increase
as
much
as4
psi
(0.3
bar)
over
their
cold
pressures
.

Tires,
rotating

BMW
does
not
recommend
tire
rotation
.
Due
to
the
cars
sus-
pension
design,
the
fronttires
begin
to
wear
first
at
the
outer

shoulder
and
the
rear
tires
begin
to
wear
first
at
themiddle
of

the
tread
or
inner
shoulder
.
Rotating
the
tires
may
adversely
af-

fect
roadhandling
and
tire
grip
.

NOTE-

The
main
purpose
of
tire
rotation
isto
promote
even
wear
and
maximum
tire
life
.
Tire
life
may
be
decreased
slightly
if
the
tires
are
not
rotated
.

Wheels,
aligning

Routine
maintenance
of
the
brake
system
includes
maintain-

ing
the
brake
fluid
in
the
reservoir,
checking
brakepads
for

wear,
checking
hand
brake
functíon,
and
inspecting
the
system

for
fluid
leaks
or
other
damage
.

Check
that
brake
hoses
are
correctly
routed
to
avoidchafing

or
kinkíng
.
Inspect
unions
and
brake
calipers
for
signs
of
fluid

leaks
.
Inspect
rigid
fines
for
corrosion,
dents,
or
other
damage
.

Inspect
flexible
hoses
for
cracking
.
Replace
faulty
hoses
or
lines
as
described
in
340Brakes
.

WARNING
-

Incorrect
installation
or
overtightening
hoses,
fines,

and
unions
may
cause
chafing
or
leakage
.
This
can
lead
to
partíal
or
completebrake
system
failure
.

MAINTENANCE
PROGRAM



020-
1
7

B323

Fig
.
24
.
Disc
brake
pad
wear
can
checked
through
opening
in
caliper
.

The
brake
caliper
should
be
unbolted
from
the
suspension

strut
to
properly
inspect
the
brake
pads
and
the
rotors
.
See
Fig
.

25
.
Brake
caliper
removal
and
installation
procedures
are
given
in
340
Brakes
.
BMW
recommends
checking
the
front
and
rear
alignment

once
a
year
and
whenever
new
tires
are
installed
.
See320

Steering
and
Wheel
Alignment
for
a
more
detailed
discus-

sion
of
alignment
requirements
and
specifications
.

Brake
Pad
Lining
Minimum
Thickness

(Dimension
A)

Brake
system,
inspecting



"
Front
and
reardisc
brake
pads
....
3
.0
mm
(0
.12
in)

Brake
fluid,
replacing

BMW
strictly
recommends
replacing
the
brake
fluid
every
two
years
.
This
will
help
protect
against
corrosion
and
the
ef-

fects
of
moisture
in
the
(luid
.
See340
Brakes
for
brake
fluid

flushing
procedures
.

Parking
brake,
checking

The
parking
brakesystem
is
independent
of
the
main
braking

system
and
may
requireperiodic
adjustment
dependingon
use
.
Adjust
the
parking
brake
if
the
brake
lever
can
be
pulled
up

more
than
8
clicks
.
Check
that
the
cable
moves
freely
.
A
de-

scription
of
the
parking
brake
and
parking
brake
adjustment

can
be
found
in
340Brakes
.

UNDER-CARMAINTENANCE

020-20



MAINTENANCE
PROGRAM

Seat
Belts



Washing
Chassis

Dirt
and
other
abrasive
particles
will
damage
seat
belt
web-



Periodic
washing
of
the
underside
of
the
car,
especially
in

bing
.
If¡t
is
necessary
to
clean
seat
belts,
use
a
mild
soap
solu-



winter,
will
help
prevent
accumulation
of
road
salt
and
rust
.
The

tion
.
Bleach
and
other
strong
cleaning
agents
may
weaken
the



besttime
to
wash
the
underside
is
just
after
the
car
has
been

belt
webbing
and
should
be
avoided
.



driven
in
wet
conditions
.
Spray
the
chassis
with
a
powerful
jet
of

water
.
Commercial
or
self-service
car
washes
may
not
be
best

WARNING-



for
this,
as
they
may
recycle
the
salt-contaminated
water
.

Do
not
clean
the
seat
belt
webbing
using
dry
clean-
ing
or
other
chemicals
.
Allow
wet
belts
to
dry
before
allowing
them
to
retract
.



Speeial
Cleaning

The
condition
of
the
belt
webbing
and
the
function
of
the
re-

tractor
mechanisms
should
be
inspected
.
See720
Seat
Belts
for
seat
belt
inspection
information
.

Exterior
Washing

The
longer
dirt
isleft
on
the
paint,
the
greater
the
risk
of
dam-
aging
the
glossy
finish,
either
by
scratching
or
by
the
chemical
effect
dirt
particles
may
have
on
the
paintedsurface
.

Do
not
wash
the
car
in
direct
sunlight
.
If
the
engine
hood
is

warm,
allow
it
to
cool
.
Beads
of
water
not
only
leavespots
when
dried
rapidly
by
the
sun
or
heat
from
the
engine,
but
also
can
act
as
small
magnifyingglasses
and
burn
spots
into
the
finish
.
Wash
thecar
with
a
mixture
of
lukewarmwater
and
a
car
wash
product
.
Rinse
using
plenty
of
clear
water
.
Wipe
the
body
dry
witha
soft
cloth
towel
or
chamois
to
prevent
water-spotting
.

Waxing

For
a
long-lasting,protective,
and
glossy
finish,
apply
a
hard
wax
after
thecar
has
been
washed
and
dried
.
Use
carnauba
or
synthetic
based
products
.
Waxing
is
not
needed
after
every
washing
.
You
can
tell
when
waxing
is
required
by
looking
at
the
finísh
when
it
is
wet
.
If
the
water
coats
the
paint
in
smooth
sheets
instead
of
forming
beads
that
rol¡
off,
a
new
coat
of
wax
is
needed
.
Wax
shouldnot
be
applied
to
black
trim
pieces,
rub-
ber,or
other
plastic
parts
.

Polishing

Use
paintpolish
only
if
the
finish
assumes
a
dull
lock
after
long
service
.
Polish
can
beused
to
remove
tar
spots
and
tar-
nish,
but
afterwards
a
coat
of
wax
should
be
applied
to
protect
the
clean
finish
.
Do
not
use
abrasive
polish
or
cleaners
on
alu-
minum
trimor
accessories
.

BODYAND
INTERIOR
MAINTENANCE

Cylinder
Head
and
Valvetrain

The
aluminum
cylinder
head
uses
chain-driven
double

overhead
camshafts
and
four
valves
per
cylinder
.
See
Fig
.
1
.
Tha
rvfinriar
hand
nmnlnve
n
ernceflnier
rineinn
fnr
nronter

Tar
spots
canbe
removed
with
a
bugand
tar
remover
.
Never

use
gasoline,
kerosene,
nail
polish
remover,
or
other
unsuitable

solvents
.
Insect
spots
also
respond
to
tar
remover
.
A
bit
of
bak-

ing
soda
dissolved
in
the
wash
water
will
facilitate
their
removal
.
This
method
can
also
beused
to
remove
spotting
from
tree
sap
.

Interior
Care

Dirt
spots
can
usually
be
removed
with
lukewarm
soapy
wa-
ter
or
a
dry
foam
cleaner
.
Use
spot
remover
for
grease
and
o¡I

spots
.
Do
not
pour
the
(quid
directly
on
the
carpetor
fabric,
but
dampen
a
clean
cloth
and
rub
carefully,starting
at
the
edge
of
the
spot
and
working
inward
.
Do
not
use
gasoline,
naptha,
or

other
flammable
substances
.

Leather
Upholstery
and
Trim

Leather
upholstery
and
trim
should
be
periodically
cleaned
using
a
slightly
damp
cotton
or
wool
cloth
.
The
idea
is
to
get
rid
of
the
dirtin
the
creases
and
pores
that
can
cause
brittleness
and
premature
aging
.
On
heavily
soiled
areas,
usea
mild
deter-
gent
(such
as
Woolite®)
or
other
specially
formulated
leather
r

cleaners
.
Use
two
tablespoons
to
one
quart
of
cold
water
.
Dry

the
trim
and
upholstery
completely
using
a
soft
cloth
.
Regular
use
of
agood
quality
leather
conditioner
will
reduce
drying
and
crackingof
the
leather
.

1
.
Camshafts
2
.
Rocker
arms
3
.
Hydraulic
valve
adjusters
(HVA)
4
.
Valve
and
conical
valve
spring

If
a
battery
cableconnection
hasno
visible
faults,
but
is
still
suspect,
measure
the
voltage
drop
across
the
connection
.
A
large
drop
indicates
excessive
resistance,
meaning
the
con-
nection
is
corroded,
dirty,
or
damaged
.
Clean
or
repair
the
connection
and
retest
.

NOTE-

For
instructions
on
conducting
a
voltage
drop
test,
and
other
general
electrical
troubleshooting
information,
see600
Electrical
System-General
.

Wiring
and
Harness
Connections

The
electronic
fuel
injection
and
ignition
systems
operate
at

low
voltage
and
current
values,
making
them
sensitive
to

small
increases
in
resistance
.
The
electrical
system
is
routine-

ly
subjected
to
corrosion,
vibration
and
wear,
so
faults
or
cor-

rosion
in
the
wiring
harness
and
connectors
are
common
causes
of
driveability
problems
.

Visually
inspect
all
wiring,
connectors,
switches
and
fuses
in
the
system
.
Loose
or
damaged
connectors
can
cause
inter-

mittent
problems,
especially
the
smallterminals
in
the
ECM

connectors
.
Disconnect
the
wiring
harness
connectors
to

check
for
corrosion
;
and
use
electrical
cleaning
spray
to
re-

move
contaminants
.
Often,
simply
disconnecting
and
recon-

necting
a
dirty
connector
several
times
will
clean
the
terminals
and
help
to
reestablish
good
electrical
contact
.

If
a
wiring
harnessconnectorhasno
visible
faults,
but
is
still

suspect,
measure
the
voltage
drop
across
the
connector
.
A

large
drop
indicates
excessive
resistance,
meaning
the
con-

nector
is
corroded,
dirty
or
damaged
.
Clean
or
repair
the
con-

nector
and
retest
.

Ground
Connections

For
any
electrical
circuit
to
work,
it
must
make
acomplete

path,
beginning
at
the
positive
(+)
battery
terminal
and
ending

at
the
negative
(-)
terminal
.
The
negative
(-)
battery
cable
is

attached
to
the
car's
chassis
.
Therefore,
any
wireor
metal

part
attached
to
the
chassis
provides
a
good
ground
path
back

to
the
negative
(-)
battery
terminal
.

Poorground
connections
are
amajor
source
of
driveabílity

problems
.
If
any
of
themainground
connections
for
the
igni-
tion
system
or
the
fuelinjection
system
are
faulty,
the
in-

creased
resistance
in
that
circuit
will
cause
problems
.

Visually
inspect
al¡
ground
wires
and
connections
for

breaks,
looseness
or
corrosion
.
Be
careful
because
wires

sometimes
break
internally
or
in
areas
not
easily
visible
.
The

main
grounds
for
the
DME
system
are
shown
in
Fig
.
11,Fig
.

12,
and
Fig
.
13
.
Also
check
the
main
fuel
pump
ground
in
the
center
console,
below
the
emergency
brake
handle
.

If
a
ground
connection
has
no
visiblefaults,
but
is
still
suspect,

measure
the
voltage
drop
acrossthe
connection
.
A
large
drop

indicates
high
resistance,
meaning
the
connection
is
corroded,

dirty
or
damaged
.
Clean
or
repair
the
connection
and
retest
.

ENGINE-GENERAL
100-
1
3

UU,~uyi

Fig
.
11
.
Mainground
(arrow)
for
engine
management
system
.
Grounds
are
in
right
rear
of
engine
compartment
.

Fig
.
12
.
Mainground
for
ignition
coils
on
MS
41
.1
engine
manage-
ment
system
(arrow)
.

DRIVEABILITY
TROLIBLESHOOTING

110
Engine
Removal
and
Installation

GENERAL
.
.
.
.
.......
.
.
.
..........
.
...
110-1



Engine,
removing
and
installing
(4-cylinder
engines)
.
..
.....
..
...........
110-1

ENGINE
REMOVAL
AND
INSTALLATION
110-1



Engine,
removing
and
installing
(6-cylinder
engines)
..
...
...
..
.....
..
....
110-4

GENERAL

Some
special
tools
are
required
for
removal
and
installation
of
the
engine
.
Be
sure
to
have
the
necessary
equipment
on
hand
before
starting
thejob
.

CAUTION-

"
Engine
removal
requires
disconnecting
the
bat-
tery
.
This
may
erase
any
system
fault
code(s)
that
havebeen
stored
in
control
unit
memories
.
Check
forfault
codes
prior
to
disconnecting
the
battery
cables
.

"
If
the
Check
Engine
lightis
illuminated
with
the
engine
running,
see
100
Engine-General
for
On-Board
Diagnostics
(08D)
fault
code
infor-
mation
.
"
If
any
other
system
faults
have
been
detected,
as
indicated
by
an
illuminated
ANTI
LOCK,
SRS
or
AST
warning
light,
see
the
appropriate
repair
group
inthis
manual
or
an
authorized
BMW
dealer
for
more
information
on
fault
codes
.

ENGINE
REMOVALAND
INSTALLATION

Engine,
removing
and
installing

(4-cylinder
engines)

Cover
al¡
painted
surfaces
before
beginning
theremoval

procedure
.
Asan
aid
to
installation,
label
al¡
components,

wires,
and
hoses
before
removing
them
.
Do
not
reuse
gas-

kets,
O-rings
or
seals
during
reassembly
.

WARNING
-

Due
to
risk
of
personal
injury,
be
sure
the
engine
is

cold
before
beginning
the
removalprocedure
.

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

compartment
.



0011969

CAUTION-

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

ENGINE
REMOVAL
AND
INSTALLATION



110-1

2
.
Remove
transmission
from
car
.
See230
Manual
Transmission
or
240
Automatic
Transmission
.

3
.
Remove
enginehood
or
place
hood
in
service
positíon
.
See
410
Fenders,
Engine
Hood
.

NOTE-

tt
is
notnecessary
to
remove
the
engine
hood,
but
it
is
helpful
and
will
make
engine
removal
and
installation
easier
.

4
.
Remove
splash
guard
under
engine,
if
applicable
.

5
.
Unbolt
ignition
coil
assembly
from
bracket
on
strut
tow-er
.
Disconnect
wiring
to
ignition
cofs,
then
place
coil
assembly
on
engine
.

6
.
Disconnect
al¡
cables
and
harness
connectors
at
throt-
tle
housing
.

7
.
Unbolt
andremove
complete
air
cleaner
housing
with

mass
air
flow
sensor,
disconnecting
and
labeling
con-

nectors,
ducting
and
hoses
asnecessary
.
See
Fig
.
1
.

Fig
.
1
.



Intake
air
duct
hose
clamp
(A),
mass
air
flow
sensor
connec-
tor
(B),
and
air
cleanerto
air
flow
sensor
clips
(C)
on
M44
en-
gine
.

ENGINE
REMOVAL
AND
INSTALLATION