change time BMW M3 1996 E36 Workshop Manual

B
-
1
ROBERT
BENTLEY,
INC
.
I
AUTOMOTIVE
PUBLISHERS

Information
that
makes



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Technical
Contact
Information

We
value
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Technical
comments
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to
us
.
Please
send
your
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.bmw@rb
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time,
updates
may
be
made
tothis
manual
.
A
listing
of
updates
canbe
found
on
the
web
Iat
www
.rb
.com/update
s

Do
not
use
this
manual
unless
you
are
familiar
with
basic
automotive
repair
procedures
and
safe
workshop
practices
.
This
manual
illustrates
the
workshop
procedures
required
for
most
service
work
.
It
is
not
a
substitute
for
fui¡
and
up-to-dateinformation
from
the
vehicie
manufacturer
or
for
proper
training
asan
automotive
technician
.
Note
that
it
is
not
possible
for
us
to
anticipate
al¡
of
the
ways
or
conditions
under
which
vehicles
may
be
serviced
or
to
provide
cautions
as
to
all
of
the
possible
hazards
that
may
result
.

The
vehicie
manufacturer
will
continue
to
issue
service
information
updates
and
parts
retrofits
after
the
editorial
closing
of
this
manual
.
Some
of
those
updates
and
retrofits
will
apply
to
procedures
and
specifications
in
this
manual
.
We
regret
that
we
cannot
supply
updates
to
purchasers
of
this
manual
.

We
haveendeavored
to
ensure
the
accuracy
of
the
information
in
this
manual
.
Please
note,
however,
that
considering
thevast
quantity
and
the
complexity
of
the
service
information
involved,
we
cannot
warrant
the
accuracy
or
completeness
of
the
information
contained
in
this
manual
.

FORTHESE
REASONS,NEITHERTHEPUBLISHER
NORTHE
AUTHOR
MAKES
ANY
WARRANTIES,
EXPRESS
OR
IMPLIED,THATTHE
INFORMATION
IN
THIS
BOOK
IS
FREE
OF
ERRORS
OR
OMISSIONS,
AND
WE
EXPRESSLY
DISCLAIMTHE
IMPLIED
WARRANTIESOF
MERCHANTABILITY
AND
OF
FITNESS
FOR
A
PARTICULAR
PURPOSE,
EVEN
IF
THE
PUBLISHER
OR
AUTHOR
NAVEBEEN
ADVISED
OF
A
PARTICULAR
PURPOSE,
AND
EVEN
IF
A
PARTICULAR
PURPOSE
IS
INDICATED
IN
THE
MANUAL
.
THE
PUBLISHER
AND
AUTHOR
ALSO
DISCLAIM
ALL
LIABILITY
FOR
DIRECT,
INDIRECT,
INCIDENTAL
OR
CONSEQUENTIAL
DAMAGES
THAT
RESULT
FROM
ANYUSE
OF
THE
EXAMPLES,
INSTRUCTIONS
OR
OTHER
INFORMATION
IN
THIS
BOOK
.I
N
NO
EVENTSHALL
OUR
LIABILITY
WHETHER
INTORT,
CONTRACT
OR
OTHERWISE
EXCEEDTHECOST
OFTHIS
MANUAL
.

Your
common
sense
and
good
judgment
are
crucial
to
safe
and
successful
service
work
.
Read
procedures
through
before
starting
them
.
Thinkabout
whether
the
condition
of
your
car,
your
leve¡
of
mechanical
skill,
or
your
leve¡
of
reading
comprehension
might
result
in
or
contribute
in
some
way
to
an
occurrence
which
might
cause
you
injury,
damage
your
car,or
result
in
an
unsafe
repair
.
lf
you
have
doubts
for
these
or
other
reasons
about
your
ability
to
perform
safe
repair
workon
your
car,
have
the
work
done
at
an
authorized
BMW
dealeror
other
qualified
shop
.

Part
numbers
listed
inthis
manual
are
for
identification
purposes
only,
not
for
ordering
.
Always
check
with
your
authorized
BMW
dealer
toverifypart
numbers
and
availability
beforebeginning
service
work
that
may
requíre
new
parts
.

Before
attempting
any
work
on
your
BMW,
read
the
wamings
and
cautions
on
pages
vi¡
and
vi¡¡,
andany
waming
or
caution
that
accompanies
a
procedure
in
the
service
manual
.
Review
the
warnings
and
cautions
on
pages
vi¡
and
viü
each
time
you
prepare
to
workon
your
BMW
.

Special
tools
required
to
perform
certain
service
operations
are
identified
in
the
manual
and
are
recommended
for
use
.
Use
of
tools
other
than
those
recommended
inthis
service
manual
may
be
detrimental
to
the
car's
safe
operation
as
well
as
the
safety
of
the
person
servicing
thecar
.

Copies
of
this
manual
may
be
purchased
from
most
automotiveaccessories
and
parts
dealers
specializing
in
BMW
automobiles,
from
selected
booksellers,
or
directly
from
the
publisher
by
mail
.

The
publisher
encourages
comments
from
the
reader
of
this
manual
.
These
communications
havebeen
and
will
be
carefully
considered
in
the
preparation
of
this
and
other
manuals
.
Please
write
to
Robert
Bentley,
Inc
.,
Publishers
at
the
address
listed
on
the
top
of
this
page
.

This
manual
was
published
byRobert
Bentley,
Inc
.,
Publishers
.
BMW
has
not
reviewed
and
does
not
vouch
forthe
accuracy
of
thetechnical
specifications
and
procedures
described
in
this
manual
.

Libraryof
Congress
Cataloging-in-Publication
Data

BMW
3
SeriesService
ManualM3,
318i,
323i,3251,
328i,
Sedan,
Coupe
and
Convertible
:
1992,
1993,
1994,
1995,
1996,1997,
1998
.
p
.
c
m
.
Includes
index
.
ISBN
0-8376-0326-9
1
.
BMW
3
Series
automobile--Maintenance
and
repair--Handbooks,
manuals,
etc
.
I
.
Robert
Bentley,
inc
.
TL215
.13251356
1999
629
.28'
722--cic21



99-17179
CIP
Bentley
Stock
No
.
B398

Editorial
closing
01/99

0302010099
1098765432

The
paper
used
in
this
publication
is
acidfree
and
meets
the
requirements
of
the
National
Standard
for
Information
Sciences-
Permanence
of
Paper
for
PrintedLibrary
Materials
.
O

©Copyright
1999
Robert
Bentley,
Inc
.

All
rights
reserved
.
All
information
contained
in
this
manual
is
based
onthe
information
available
to
the
publisher
at
the
time
of
editorial
closing
.
The
right
is
reserved
to
make
changes
at
any
time
without
notice
.
No
partof
this
publication
may
be
reproduced,
stored
in
a
retrieval
system,
or
transmitted
in
any
form
orby
any
means,
electronic,
mechanical,
photocopying,
recording,
or
otherwise,
without
the
prior
written
consent
of
thepublisher
.
This
includes
text,
figures,
and
tables
.
All
rights
reserved
underBerne
andPan-American
Copyright
conventions
.
Manufactured
in
the
UnitedStates
of
America

Please
read
these
warnings
and
cautions

before
proceeding
with
maintenance
and
repair
work
.

WARNING-



"
Friction
materials
(such
as
brake
pads
or
shorts
or
clutchdiscs)
contain
asbestos
fibers
or
other
friction
materials
.
Do
notcreate
"
See
also
Cautionson
page
viü



dustby
grinding,
sanding,
orby
cleaning
with
compressed
air
.

"
Some
repairs
may
be
beyond
your
capability
.
If
you
lack
the



Avoid
breathing
dust
.
Breathing
any
friction
material
dust
can
lead

skills,
tools
and
equipment,
or
a
suitable
workplace
for
any
proce-



to
serious
diseases
and
may
result
in
death
.

duredescribed
in
this
manual,
we
suggestyou
leave
such
repairs



"
Batteries
give
off
explosive
hydrogen
gas
during
charging
.
to
an
authorized
BMW
dealer
service
department
or
other
quali-



Keep
sparks,
lighted
matches
and
open
flame
away
from
the
top
fied
shop
.



of
the
battery
If
hydrogen
gas
escaping
from
the
cap
vents
is

"Do
not
re-use
any
fasteners
that
are
worn
or
deformed
in
normal



ignited,
it
will
ignite
gas
trapped
in
the
cells
and
cause
the
battery

use
.
Many
fasteners
are
designed
to
be
used
only
once
and



to
explode
.

become
unreliable
and
may
fail
when
used
a
second
time
.
This



"
Connect
and
disconnect
battery
cables,
jumper
cablesora
bat-
includes,
but
is
not
limited
to,
nuts,
bolts,
washers,
self-locking
nuts
or
bolts,
circlips
and
cotterpins
.
Always
replace
these
fasteners

with
new
parts
.
"Do
not
quick-charge
the
battery
(for
boost
starting)
for
longer
"
Never
work
under
a
lifted
car
unless
it
is
solidly
supportedon



than
one
minute
.
Wait
at
least
one
minute
before
boosting
the
bat-
stands
designed
for
the
purpose
.
Do
not
support
a
car
on
cinder



tery
a
second
time
.
blocks,
hollow
tiles
or
other
props
that
may
crumble
under
contin-

uous
load
.
Never
work
under
acar
that
is
supported
solely
by
a



"Do
not
allow
battery
charging
voltage
to
exceed
16
.5
volts
.
If
the

jack
.
Never
work
under
thecar
while
the
engine
is
running
.



battery
beginsproducing
gas
or
boiling
violently,
reduce
the
charg-
ing
rate
.
Boosting
a
sulfated
battery
at
a
high
charging
rate
can
"
If
you
are
going
to
work
under
acar
on
the
ground,
make
sure



cause
an
explosion
.
that
the
ground
is
level
.
Block
the
wheels
to
keep
the
carfrom
roll-

ing
.
Disconnect
the
battery
negative
(-)
terminal
(ground
strap)to



"
The
air-conditioning
system
is
filled
with
chemical
refrigerant,

prevent
others
from
starting
thecar
while
youare
under
it
.



which
is
hazardous
.
TheA/C
system
should
be
servicedonly
by

trained
technicians
using
approved
refrigerant
recovery/recycling
"
Never
run
the
engine
unless
the
work
area
is
well
ventilated
.



equipment,
trained
in
related
safetyprecautions,
and
familiar
with
Carbon
monoxide
kills
.



regulations
governing
the
discharging
and
disposal
of
automotive

"
Finger
rings,
bracelets
and
other
jewelry
shouldbe
removed
so



chemical
refrigerants
.

tery
charger
only
with
the
ignition
switched
off,
to
prevent
sparks
.

Do
not
disconnect
the
battery
while
the
engine
is
running
.

that
theycannot
cause
electrical
shorts,
get
caught
in
running



"
Do
not
expose
any
partof
the
A/Csystem
to
high
temperatures
machinery,
or
be
crushed
by
heavy
parts
.



suchas
open
flame
.
Excessiveheat
will
increase
system
pressure

"
Tie
long
hair
behind
your
head
.
Do
not
wear
a
necktie,
a
scarf,



and
may
cause
the
system
to
burst
.

loose
clothing,
or
a
necklace
when
you
work
near
machine
tools
or



"
Some
aerosol
tire
inflators
are
highly
flammable
.
Be
extremely
running
engines
.
If
your
hair,
clothing,
or
jewelry
were
to
get
caught



cautious
when
repairing
a
tire
that
may
havebeen
inflated
using
in
the
machinery,
severe
injury
could
result
.



an
aerosol
tire
inflator
.
Keep
sparks,
open
flame
or
other
sources

"
Do
not
attempt
to
work
onyourcar
if
you
do
not
feel
well
.
You



of
ignition
away
from
the
tire
repair
area
.
Inflate
and
deflate
the
tire

increase
the
danger
of
injury
toyourself
and
others
if
you
are
tired,



at
least
four
times
before
breaking
the
bead
from
therim
.
Com-

upset
or
have
takenmedication
or
any
other
substance
that
may



Pletely
remove
the
tire
from
the
rim
beforeattempting
any
repair
.

keep
you
from
being
fully
alert
.

"
Illuminate
your
work
areaadequately
but
safety
.
Use
a
portable

safety
light
for
working
inside
or
under
thecar
.
Make
surethe
bulb

is
enclosedbya
wire
cage
.
The
hot
filament
of
an
accidentally
bro-

ken
bulb
can
ignite
spilled
fuel
or
oil
.

"
Catch
draining
fuel,
oil,
orbrake
fluid
in
suitable
containers
.
Do

not
use
food
or
beverage
containers
that
mightmislead
someone

into
drínking
from
them
.
Store
flammable
fluids
away
from
fire
haz-

ards
.
Wipe
up
spills
at
once,
but
do
not
store
the
oily
rags,
which

can
ignite
and
burn
spontaneously
.

"
Always
observe
good
workshop
practices
.
Wear
goggles
when

youoperate
machine
tools
or
work
with
battery
acid
.
Gloves
or

other
protectioeclothing
should
be
worn
whenever
thejob
requires

working
with
harmful
substances
.

"
Greases,
lubricants
and
other
automotive
chemicals
contain

toxic
substances,
many
of
which
are
absorbed
directly
through
the

skin
.
Read
the
manufacturer's
instructions
and
warnings
carefully
.

Use
hand
andeye
protection
.
Avoid
direct
skin
contact

"
Cars
covered
by
this
manual
are
equipped
with
a
supplemental

restraint
system
(SRS),
that
automatically
deploys
an
airbag(s)
in

theevent
of
a
frontal
ímpact
.
The
airbag(s)
is
inflated
byan
explo-

sive
device
.
Handled
improperly
or
without
adequate
safeguards,

can
be
accidently
activated
and
cause
serious
injury
.

"
The
ignition
system
produces
high
voltages
that
can
be
fatal
.

Avoid
contact
with
exposed
terminals
and
use
extreme
care
when

working
ona
car
with
the
engine
running
or
the
ígnition
switched
on
.

"
Place
jack
stands
only
at
locations
specified
bymanufacturer
.

The
vehicle
lifting
jacksupplied
with
the
vehicle
is
intended
for
tire

changes
only
.
A
heavy
duty
floor
jack
shouldbe
used
to
lift
vehicle

before
installing
jack
stands
.
See
010
Fundamentals
for
theDo-
.

it-Yourself
Owner
.

"
Battery
acid
(electrolyte)
can
cause
severeburns
.
Flush
contact

area
with
water,
seek
medical
attention
.

"
Aerosolcleaners
and
solvents
may
contain
hazardous
ordeadly
vapors
and
are
highly
flammable
.
Use
only
in
a
wellventilated

area
.
Do
not
use
on
hot
surfaces
(engines,
brakes,
etc
.)
.

"
Disconnect
the
battery
negative
(-)
terminal
(Ground
strap)



"
Do
not
remove
coolant
reservoir
or
radiator
cap
with
theengine

whenever
you
work
on
the
fuel
system
orthe
electrical
system
.
Do



hot
.
Danger
of
bums
and
engine
damage
.

not
smoke
or
work
near
heaters
or
other
fire
hazards
.
Keep
an

approved
fire
extinguisher
handy
.



continued
on
next
page
vii

Please
read
these
warnings
and
cautions

before
proceeding
with
maintenance
and
repair
work
.

CAUTION-

"
See
also
Warnings
onpage
vi¡



"
Beforedoing
any
electrical
welding
on
cars
equipped
with
ABS,
disconnect
the
battery
negative
(-)
terminal
(ground
strap)
and
the
"
If
you
lack
the
skills,
tools
and
equipment,
ora
suitable
work-



ABS
control
unit
connector
.
shop
for
any
procedure
described
in
this
manual,
we
suggest
you
leave
such
repairs
to
an
authorized
BMW
dealer
or
other
qualified



"
On
cars
equipped
with
anti-theft
radios,
make
sureyou
know
the
shop
.



correct
radio
activation
code
before
disconnecting
the
battery
or
removing
the
radio
.
lf
the
wrong
code
is
entered
into
the
radio
"
BMW
is
constantly
improving
its
cars
and
sometimes
these



when
power
is
restored,
that
radio
may
lock
up
and
be
renderedchanges,
both
in
parts
and
specifications,
are
made
applicable
to



inoperable,
even
if
the
correct
code
is
thenentered
.
earlier
models
.
Therefore,
part
numbers
listed
in
this
manual
are
for
reference
only
.
Always
check
with
your
authorized
BMW
dealer



"
Always
make
sure
ignition
is
off
before
disconnecting
battery
.
parts
department
for
the
latest
information
.
"
Label
battery
cablesbefore
disconnecting
.
Onsome
models,
"
Before
starting
a
job,
make
certain
that
you
have
all
the
neces-



battery
cablesarenot
color
coded
.
sary
tools
and
parts
on
hand
.
Read
al¡
the
instructions
thoroughly,
do
not
attempt
shortcuts
.
Use
tools
appropriate
to
the
work
and



"
Disconnecting
the
battery
may
erase
fault
code(s)
stored
in
con-

use
only
replacement
parts
meeting
BMW
specifications
.
Make-



trol
module
memory
Using
special
BMW
diagnostíc
equipment,
shift
tools,
parts
and
procedures
will
not
make
good
repairs
.



check
forfault
codes
prior
to
disconnecting
the
battery
cables
.If
the
Check
Engine
light
is
illuminated,
see100
Engine-General
for
"
Use
pneumatic
and
electric
tools
only
to
loosenthreaded
parts



On-Board
Diagnostics
(OBD)
fault
code
information
.
lf
any
other
and
fasteners
.
Never
use
these
tools
to
tighten
fasteners,
espe-



system
faults
have
been
detected
(indicated
by
an
ílluminated
cially
on
light
alloy
parts
.
Always
use
a
torque
wrench
to
tighten



warning
light),
see
an
authorized
BMW
dealer
.
fasteners
to
the
tightening
torque
specification
listed
.
"
If
a
normal
or
rapid
charger
is
used
to
charge
battery,
the
battery
"Be
mindful
of
the
environment
and
ecology
.
Before
you
drain
the



mustbe
disconnected
and
removed
fromthe
vehicle
in
order
to
crankcase,
find
outthe
proper
way
to
dispose
of
the
oil
.
Do
not



avoid
damaging
paint
and
upholstery
pour
oil
onto
the
ground,
down
a
drain,
or
into
a
stream,
pond
orlake
.
Dispose
of
in
accordance
withFederal,
State
and
Local
laws
.



"Do
not
quick-chargethe
battery
(for
boost
starting)
for
longer
than
one
minute
.
Wait
at
least
one
minute
before
boosting
the
bat-
e
If
battery
power
is
lost
or
the
battery
has
been
disconnected,
the



tery
a
second
time
.
powerwindows
must
be
re-initialized
.
Both
one
touch
up/down
and
pinch-protection
will
be
inactive
until
windows
are
re-initial-



"
Connect
and
disconnect
a
battery
charger
only
with
the
battery
ized
.
See
512
Door
Windows
.



charger
switched
off
.

"
The
control
module
for
the
anti-lock
brake
system
(ABS)
cannot
withstand
temperatures
from
a
paint-drying
booth
or
aheat
lamp
in
excess
of
203°F
(95°C)
and
should
not
be
subjected
to
temper-
atures
in
excess
of
185°F
(85°C)
for
more
than
twohours
.

"
Sealed
or
"maintenance
free"
batteries
shouldbeslow-charged
only,
at
anamperage
ratethat
is
approximately
10%
of
the
bat-
tery's
ampere-hour
(Ah)
rating
.

"
Do
not
allow
battery
chargingvoltage
to
exceed
16
.5
volts
.
If
the
battery
begins
producing
gas
or
boiling
violently,
reduce
the
charg-
ing
rate
.
Boosting
a
sulfated
battery
at
a
high
charging
rate
can
cause
an
explosion
.

GENERAL

FUNDAMENTALS
FORTHE
DO-IT
YOURSELF
OWNER



010-1

010
Fundamentals
for
the

Do-lt-Yourself
Owner

GENERAL
.......
.
.
.
......
.
.........
.
.
.010-1



TOOLS
.
.
...
.
............
.
............
010-8

Basic
Tool
Requirements
......
.
.
.
.
.
.
.
.
.
.
010-8
HOW
TO
USE
THIS
MANUAL
.
...
.
...
.
.
.
010-2



JackStands
.
.
.
.
.
.
.
.
.
.......
.
.
.



.
...
.
.
010-9

Warnings,
Cautions
and
Notes
.........
.
.
.
010-2



Oil
Change
Equipment
.
....
.
......
.
...
.
.
010-9

GETTING
STARTED
.
.......
.
.
.
.
.
......
.010-2



Torque
Wrench
....
.
.
.
....
.
..
.
.
.
.
.
...
.
010-10

Feeler
Gauges
.
...
.
.
.
.......
.
.
.
.
.
.
.
.
.
010-10
Safety



....
.
.....



.....
.
.
.
.
.
...
.
.
.
.
.
.
.
010-2



Digital
Multimeter



.
.
.
.
.
.....
.
.
.
.
.
.
.
.
.
.
.
010-10
Lífting
the
Car
...........
.
.
.
.
.
.
.
.
.
...
.
.
.
010-3



gMW
Special
Tools
...
.
....
..
.....
.
...
.
010-11
Raising
car
safely
...
..
...
.



...
.
.....
.
...
010-3

Working
under
car
safely
...
..
....
.
.....
.
...
010-4



EMERGENCIES
.
.
.
.
.
.
.....
.
.
.
.
.
.
.
...
.
010-11

ADVICE
FOR
THE
BEGINNER
.......
.
.
.
010-4



Changing
a
Tire
.
.
.
.
.
.
....
..
.
.
.
.
.
.
.
.
.
.010-11
Car
Will
Not
Start
....
.
....
.
.
.
........
.010-11
Planning
Ahead
....
.
...........
.
....
.
.
.
010-4



Jump
Starting
Car
..
.
.
.
....
.
...........
010-12
Cleanliness
.
.
.
.
.
.
.
..
....
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
010-4



Overheating



.
.....
.
.
.
.........
.
.
.
...
.
010-12
Non-reusable
Fasteners
...
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
010-5



Low
Oil
Pressure
...
...
.
.
...
.
.
.
..
...
....
010-13
Tightening
Fasteners
.....
.
.
.
...
.
.
.
.
.
.
.
.
.
010-5



Brake
Fluid
Level



.
.
.....
.
.
.
.
.
...
.
.....
010-13
Gaskets
and
Seals
.......
.
.
.
...
.
.....
.
.
.
010-5



Check
Engine
Warning
Light
.
.
.
...
.
.....
010-13
Electrical
Testing
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
...
.
.
.
010-6



pim
Lights
.....
.
..
.
.
.
....
.
.
.
.........
010-13Wire
Repairs



.
.
.
.
.
.
.
.
.
.
...
.
.
.
.
.
.
.
......
010-6



Towíng



.
.
...
.
.
.
.
.
.
.
.
.
.
.
...
.
.
.
.
.
...
.
.010-13

BUYINGPARTS



.
.
.
.....
.
.
.
...
.
.
.
...
.
.
.
010-6



Spare
Parts
Kit
.
.
.
.
.
.
.......
.
.
.
.
.
.....
010-14

Genuine
BMW
Parts
.
.
.
.
.
.
.
.
.
.
.
.
.
.
......
010-6

Non-returnable
Parts
.
.
.
.
.
.
.
.
.
.
.
.
.
.
......
010-7



TABLES

Information
You
Need
to
Know
.
.
.
.
.
.
......
010-7



a
.
General
Bolt
Tightening
Torques

SERVICE
.
.
.
.
.
.
.
.
.
.
.
.
.......
.
..........
010-7

Although
the
BMW
is
a
sophisticated
and
complex
machine,

basic
maintenance
can
be
accomplished
byan
interested
own-

er
with
mechanical
skills
and
the
right
information
.
Most
of
the

preventive
maintenance
that
is
required
in
the
lifetime
of
theav-

erage
BMW
is
weil
within
the
capabilitiesof
the
do-it-yourseifer
.

WARNING
-

Do
not
use
this
manual
unless
you
are
familiar
with

basicautomotive
repair
procedures
and
sale
work-
shop
practices
.
This
manual
illustrates
the
work-
shop
procedures
required
for
most
service
work
;it

is
not
a
substitute
for
full
and
up-to-date
information

from
the
vehicle
manufacturer
or
for
proper
training

asan
automotive
technician
.
Note
that
it
is
not
pos-

sible
for
us
to
anticipate
al¡
of
the
ways
orconditions
underwhich
vehicles
may
be
serviced
or
to
provide

cautions
as
to
all
of
the
possible
hazards
that
may

result
'

in
Nm
(max
.
permissible)
.
..
.
...
............
.
010-5

WARNING
-

Your
common
sense
and
good
judgment
are
crucial
tosale
and
successful
service
work
.
Read
proce-
dures
through
before
starting
them
.
Thinkabout
whether
the
condition
ofyour
car,
your
leve¡
of
me-

chanical
skill,
or
your
leve¡
of
reading
comprehen-
sion
might
result
in
orcontribute
in
some
way
to
an
occurrence
that
might
cause
you
injury
damage
your
car,
or
result
in
an
unsafe
repair
.
lf
you
havedoubts
for
these
or
other
reasonsaboutyour
abilíty
to
perform
sale
repair
work
onyour
car,
have
the

work
done
at
an
authorized
BMW
dealer
or
other
qualified
shop
.

This
section
of
the
manual
is
intended
to
helpthe
beginner

get
started
.
To
begin
with
there
is
a
discussion
on
How
To
Use

This
Manual
.
Tips
on
mechanicas
skills
and
workshop
practic-

es
that
can
help
the
beginner
do
a
faster
and
more
thorough
job

can
be
foundunderGettingStarted
.
The
basic
tools
needed

to
do
most
of
the
procedures
in
this
manual
are
foundunder
Tools
.
The
section
ends
with
a
quick
reference
guide
to
Emer-
gencies,
including
basictroubleshooting
and
information
on
how
to
gauge
the
seriousness
of
a
problem
.

GENERAL

010-10



FUNDAMENTALS
FOR
THE
DO-IT
YOURSELF
OWNER

TOOLS

Torque
Wrench

B021FNG

Fig
.
12
.
Jack
stand
for
safely
supporting
car
to
work
underneath
.

B022FNG

Fig
.
13
.
Oil
change
equipment
includesdrainplug
wrench
(17mm),
8
qt
.
drain
pan,
and
funnel
.

A
torque
wrench
is
used
to
precisely
tighten
threaded
fasten-



Fig
.
15
.
Feeler
gauge
set
.
ers
to
a
predetermined
value
.
Many
of
the
repair
procedures
in
this
manual
include
BMW-specified
torquevalues
in
Newton-
meters
(Nm)
and
the
equivalent
values
in
foot-pounds
(ft-Ib)
.



Digital
Multimeter

A
torque
wrench
with
a
range
up
to
about
150
Nm
(185
ft-lb)
has
adequate
capacity
for
most
of
the
repairs
covered
in
this
manual
.
For
recommended
torque
values
of
10
Nm
or
below,the
English
system
equivalent
is
given
in
inch-pounds
(in-lb)
.
These
small
values
may
be
most
easily
reached
using
a
torque
wrench
calibrated
in
inch-pounds
.
To
convert
inch-pounds
to
foot-pounds,
divide
by12
.

Fig
.
14
.
Torque
wrenches
.
Inexpensive
beam-type
(top)
is
adequate
but
must
be
read
visually
.
Ratchet-type
(bottom)
can
be
pre-
set
to
índicate
(click)
when
torquevalue
has
been
reached
.

Feeler
Gauges

B018FNG

Feeler
gauges
are
thin
metal
strips
of
precise
thickness,

used
to
measure
small
clearances
.
They
are
normally
available

as
a
set,
covering
a
range
of
sizes
.
See
Fig
.
15
.

Several
types
of
torque
wrenches
are
available
.
They
al¡
do



Many
of
the
electrical
tests
in
Chis
manual
cal¡
for
the
mea-
the
same
job,
bu¡
óffer
different
convenience
features
at
differ-



surement
of
resistance
(ohms)
or
voltage
values
.
For
safe
and
ent
prices
.
Two
typical
torque
wrenches
are
shown
in
Fig
.
14
.



accurate
tests
of
ignition,
fuel
injection,
and
emission
control
The
most
convenient
ones
have
a
built-in
ratchet,
and
can
be



systems,
the
multi-meter,
shown
in
Fig
.
16,
should
be
digital,
preset
to
indicate
when
a
specific
torque
value
has
been



with
high
(at
least
10,000
ohms)
input
impedance
.
Some
reached
.
Followthe
wrench
manufacturer's
directions
for
use



meters
have
automotive
functions
suchas
dweil
and
pulse
to
achieve
the
greatest
accuracy
.



width
that
are
useful
fortroubleshooting
ignition
and
fuel
injec-
tion
problems
.

CAUTION-

The
DME
system,
central
body
electronics,
and
other
electronic
systems
may
be
damaged
by
the
high
current
draw
of
a
test
fight
with
a
normal
in-
candescent
bulb
.
As
a
general
rule,
usea
high
ím-
pedance
digital
multimeter
or
an
LED
test
fightforall
electrfcal
testfng
.

B020FNG

Fig
.
16
.
Multimeter
or
Digital
Volt/Ohmmeter
(DVOM)
.

BMW
Special
Tools

FUNDAMENTALS
FOR
THE
DO-ITYOURSELF
OWNER
010-11

0012223

Some
of
the
more
challenging
repairs
covered
in
this
manual

cal¡
for
the
use
of
BMW
special
tools
.
This,
however,
does
not

automatically
mean
that
thejob
is
too
complicated
or
out
of

reach
of
thenovice
.

Many
of
the
BMW
special
tools
mentioned
in
this
manual
are
simplythe
best
thing
to
use
to
do
thejob
correctly
.
In
these
cas-

es,
the
tool
is
identified
with
a
BMW
part
number
.
See
your
au-

thorized
BMW
dealer
parts
department
for
information
on
how

to
order
special
tools
.

There
are
some
jobs
for
which
expensive
special
tools
are

essential,
and
not
a
cost-effective
purchase
for
one-time
repair

by
the
do-it-yourself
owner
.
This
manual
includes
such
repairs

for
the
benefit
of
these
with
the
necessary
experience
and
ac-

cess
to
tools
.
For
the
do-it-yourselfer,
the
need
for
special
tools

is
noted
in
the
text,
and
whether
or
not
BMW
dealer
service
is

recommended
.

EMERGENCIES

Changing
a
Tire

Stop
thecar
onas
flat
a
surface
as
possible,
in
a
place
where

you
canbe
easily
seen
by
other
drivers
.
Avoid
stopping
just

over
the
crest
of
a
hill
.
Turnon
the
emergency
flashers,
and
set

out
(lares
or
emergency
markers
well
behindthecar
.
Chock
the

wheel
(wheel
chock
located
in
trunk)
diagonally
opposite
to
the
one
being
changed
.
Passengers
shouldgetout
of
thecar
and

stand
well
away
from
the
road
.
Remove
the
spare
tire
from
the
spare
tire
storage
tray,
as
described
later
.

WARNING
-

If
a
tire
goes
fíat
while
drtving,
pull
well
off
the
road
.
Changing
a
tire
ona
busy
street
or
highway
is
very
dangerous
.
If
necessary,
drive
a
short
distance
on
the
fíat
tire
to
get
to
a
sale
place
.
tt
is
much
better
to
ruin
a
tire
or
rim
than
to
risk
being
hit
.

Take
the
jack
and
tools
from
the
tool
area
beneath
the
trunk

mat
.
Remove
the
spare
tire
from
the
tire
storage
tray
.

Loosen
the
wheel
bolts
while
the
car
is
on
the
ground,
but

leave
them
a
little
snug
.
Placethe
jack
in
the
lifting
point
nearest

the
wheel
beingchanged,
lifting
points
are
shown
in
Fig
.
1
and

Fig
.
2)
.
Use
a
board
to
provide
a
firm
footing
for
the
jack
if
the

ground
is
soft
.
Raise
the
car
only
lar
enough
so
that
the
wheel
is

fully
off
the
ground
and
then
remove
the
wheel
nuts
and
the

wheel
.

Insta¡¡
the
spare
wheel
.
Install
the
wheel
nuts
and
tighten

them
by
hand,
then
lower
the
car
.
With
all
wheelson
the

ground,
fully
tighten
the
nuts
in
a
crisscross
pattern
.
Torque
the

wheel
nuts
when
installing
the
wheel
.
Check
the
inflation
pres-

sure
of
the
spare
tire
.

Tightening
torques

"
Wheel
to
wheel
hub
.....
100
t
10
Nm
(74
t
7
ft-Ib)

Car
Will
Not
Start

If
the
engine
tucos
over
slowly
or
not
at
all,
especially
on
cold

mornings,
the
battery
may
not
be
sufficiently
charged
.
Jump-

starting
the
battery
from
another
car
may
help
.

WARNING
-

On
carswith
manual
transmisston,
push
starting
(or

tow
starting)
acar
ts
not
recommended
by
BMW
.

NOTE-

Be
sure
to
read
the
cautions
underJump
Starting
Car
prior
boosting
a
low
battery
.
Fatlure
to
followthe
cau-

tions
may
result
in
damage
to
the
electronic
compo-
nents
in
the
car
.

If
the
engine
is
turning
over
at
normal
speed
with
the
starter

motor,
the
battery
and
starter
are
fine
.
Check
to
make
sure
that

there
is
fuel
in
the
tank
.
Do
not
rely
on
the
fuel
gauge,
it
may
be

faulty
.
Instead,
remove
the
gas
filler
cap
and
rock
thecar
.
If

there
is
gas
in
the
tank,
you
should
hear
a
sloshing
sound
at
the

filler
neck
.
lf
there
is
plenty
offuel
in
the
tank,
see100
Engine-

General
for
in-depth
diagnostics
and
troubleshootingproce-

dures
.

EMERGENCIES

010-12



FUNDAMENTALSFOR
THE
DO-IT
YOURSELF
OWNER

Jump
Starting
Car

Cars
with
discharged
or
dead
batteries
can
be
jump-started
using
the
good
battery
from
another
car
.
When
jump-starting

the
engine,
always
note
the
following
warnings
.

WARNING
-

"
Battery
acid
(electrolyte)
can
cause
severe
burns,
and
will
damage
the
car
and
clothing
.
lf
electrolyte
is
spilled,
wash
the
surface
with
large
quantities
of
water
.
lfit
gets
finto
eyes,
flush
them
with
water
for
severa¡
minutes
and
cal¡
a
doctor
.

"
Batteries
produce
explosive
and
noxious
gas-
ses
.
Keep
sparks
and
flames
away
.
Do
not
smoke
near
batteries
.

"
Do
not
jump-start
the
engine
if
you
suspect
that
the
battery
is
frozen
.
Trapped
gas
may
explode
.
Allow
the
battery
to
thaw
first
.

"
Do
not
quick-charge
the
battery
(for
boost
start-
ing)for
longer
than
one
minute,
and
donot
ex-
ceed
15
volts
at
the
battery
with
the
boosting
cables
attached
.
Wait
at
least
one
minutebefore
boosting
the
battery
a
second
time
.

"
Some
electrical
system
'comfort"
features
may
not
function
correctly
once
battery
power
is
restored
.
For
example,
the
front
window
one-touch-up
func-
tion
may
be
disabled
.
Some
electrical
systems
will
need
to
be
reinitialized
Consult
the
appropriate
re-
pairgroup
formore
specific
information
.

1
.
Place
cars
close
together,
but
do
not
allow
them
to'touch
each
other
.
Turn
off
the
engine
of
thecar
with
the
good
battery
.

2
.
Connect
oneend
of
the
positive
(+)
cable
to
the
positive
(+)
post
of
the
good
battery
.
Remove
the
coverfromthe

positive
(B+)
junction
post
in
the
engine
compartment
of
the
dead
car
and
connect
the
other
end
of
the
posi-
tive
(+)
cable
to
the
junction
post
.
See
Fig
.
17
.

EMERGENCIES

3
.
Connect
one
end
of
the
negative
(-)
cable
to
the
nega-

tive
(-)
battery
post
of
the
good
battery
.
Connect
oppo-

site
end
of
the
negative
cable
(-)
to
the
engine
block
of

thecar
with
the
dead
battery
.

4
.
Start
thecar
with
the
good
battery
and
runthe
engine

at
about2,000
rpm,
then
start
the
car
with
the
dead
bat-
tery
.

5
.
With
the
engine
at
¡dle,
switch
on
the
headlights,
blower

motor
and
rear
window
defogger
to
avoid
damaging
the

cars
electrical
system
.
Carefully
disconnect
the
jumper

cables,
starting
with
the
negative
cable
on
the
engine

block
.
Turn
all
electrical
consumers
off
.

NOTE-

The
engineshould
be
run
for
at
least
an
hour
to
re-
charge
the
battery
.

Overheating

lf
the
temperature
gauge
needle
goes
into
the
red
band
on
the
gauge
face,
the
coolant
temperature
is
too
high
.
Find
a
safe
place
to
stop
and
turn
the
engine
off
.
Open
the
hood
and
allow

the
engine
to
cool
until
the
temperature
gauge
needle
is
at
the

lower
thirdof
the
scale
.
Continuing
to
drive
an
overheated
car

can
cause
extensive
engine
damage
.

WARNING
-

Do
not
remove
the
coolant
reservoir
or
radíator
cap
with
the
engine
hot
.
Undoing
either
couldspray
hot
coolant
and
cause
burns
or
damage
the
engine
.

CAUTION-

Do
not
add
cold
water
or
coolant
to
a
hot
engine
.
Engine
damage
could
result
from
the
sudden
tem-
perature
change
.

NOTE-

If
the
enginecannot
be
safely
tumed
off,
make
sure
the
air
condifioner
isoff
and
turn
the
heater
to
high
.
This
will
helo
cool
the
engine
until
a
salestopping
place
canbe
reached
.

Overheating
may
be
caused
bylow
coolant
leve¡
or
a
dam-aged
engine
drive
belt
.
Visually
check
the
coolant
leve¡
and
en-
gine
belts
as
described
in
020
Maintenance
Program
.
lf
the
coolant
leve¡
is
low,
check
the
filler
cap,hoses,
clamps
and
ra-
diator
for
signs
of
leakage
.
Check
for
leaks
at
the
water
pump
on
the
frontof
theengine
.

lf
no
leaks
are
found,
add
coolant
after
the
engine
has
cooled
.
The
carcan
be
driven,
but
have
the
cooling
system
thoroughly
checked
assoonas
possible
.
lf
replacement
cool
0013245



-



ant
is
not
available,
then
plain
water
canbe
used,
butthe
cool-
antshould
later
be
drained
and
refilled
with
theproper
mixture
Fig
.
17
.
Battery
jump
starting
posts
(arrows)
behind
right
frontstrut



of
anti-freeze
and
water
.
tower
.
Lift
cover
to
access
positive
post
.

020-
8



MAINTENANCE
PROGRAM

FLUID
AND
LUBRICANT
SPECIFICATIONS
The
fluids
and
lubricante
specified
by
BMW
are
listed
in
Ta-

ble
e
.
Shown
below
is
engine
oil
viscosity
(SAE
grade)
vs
.
oper-

ating
temperature
range
for
the
BMW
enginescovered
in
this

manual
.

Engine
Oil
Viscosity
Requirements

vs
.
Temperature

`S
EAVic
P
Q
SAE
swao

YCO

0

N

M42
engine



1
.1
I
(1
.2
US
qt
.)
M44
engine



1
.1
l(1.2
US
qt
.)
M50
engine



1
.1
1(1.2
US
qt
.)
M52
engine



1
.21(1.3
US
qt
.)
S50US
engine



1
.21(1.3
US
qt
.)
S52US
engine



1
.21(1.3
US
qt
.)

°F
80

-

1o-0
-
30
-----20

WARNING
-

The
use
of
fluids
that
do
not
meet
BMWs
specifica-
tions
may
impair
performance
and
refability,
and
may
void
warranty
coverage
.

Tablee
.
Fluids
and
Lubricants

0013227

Fluid
Approximate
Specification
capacity

Engine
oil
with
filter
change

M42
engine



5
.01
(5
.3
US
qt
.)
M44
engine



5
.0
I
(5
.3
US
qt
.)
M50
engine



6
.5
I
(6.9
US
qt
.)



API
service
SH
or
M52
engine



6
.51
(6.9
US
qt
.)



si
S50US
engine



6
.51
(6.9
US
qt
.)
S52US
engine



6.0
I
(6.3
US
qt
.)

Manual
transmission
oil

FLUID
AND
LUBRICANT
SPECIFICATIONS

See
230Manual
Transmission
for



NOTE-
fluid
specification

Tablee
.
Fluids
and
Lubricants
(continued)

Fluid
Approximate
Specification
capacity

Automatic
transmission
fluid
(ATF)
(drain
and
fill)
(additional
fluid
required
when
installing
a
drytorque
converter)

A4S
310R



See240
AutomaticTransmission
for
fluid
A4S
270R



specification
information
A5S
310Z

Final
drive
(drain
and
fill)
(Lifetime
fluid
;
no
fluid
change
required)

4-cylinder



1
.1
I
(1.2
US
qt
.)



BMW
SAF-XO
6-cylinder



1.7
l(1
.8
US
qt
.)



synthetic



oil



(ex
.
limited
slip)
BMW
SAF-X1-S
synthetic
oil
(limit-
ed
slip)

Power
steering
fluid

Al¡
modeis



permanentlysealed



Dexron
IIPATFno
drain
plug

rake
fluid

All
modeis



-
~
S
AE
Dot4

Engine
coolant

M42
engine



6
.51(6
.9
US
qt
.)
M44
engine



6
.51(6
.9
US
qt
.)
M50
engine



10
.51
(11
.1
US
qt
.)



50%
BMW
anti-
M52
engine



10
.5
1
(11
.1
US
qt
.)



freezel
50%
water
S50US
engine



10
.75
1(11
.4
qt
.)
S52US
engine



10
.75
I
(11
.4
qt
.)

CA
UTION-

Multi-viscosity
engine
oils
should
not
beused
in
the
manual
transmission
.
Use
of
such
an
oil
could
shorten
the
service
life
of
thetransmission
.

Manual
Transmission
Fluid

The
manual
transmissions
installed
in
the
E36
modeis
are

normallyfilled
with
automatic
transmission
fluid
(ATF),
although

alternative
synthetic
lubricants
may
havebeen
used
from
-
the

factory,
depending
on
transmission
type
and
model
year
.
Con-

sult
230
Manual
Transmission
for
additional
information
on

identifying
the
type
of
fluid
installed
.

Automatic
Transmission
Fluid

The
automatic
transmissions
installed
in
the
E36
modeis
are
normally
filled
with
Dexron
111
automatic
transmission
fluid

(ATF),
although
alternative
fluids
havebeen
installed
from
the

factory,
depending
on
transmission
type
and
model
year
.
Some
transmission
are
filled
with
a
special
BMW
"life-time"
automatic
transmission
fluid,
whích
does
not
requireperiodic
fluid
changes
.
Consult
240
Automatic
Transmission
for
ad-
ditional
fluid
specification
information
.

information



1



The



11-



11
lubrican
type
canbefound
on
ti
¡e
`Yype
plate"
on
the
side
of
the
transmission
.
Consult
an
authorized
BMW
dealer
foralternate
fluid
use
and
the
Continued



most-up-to-date
information
regarding
transmission
op-
erating
fluids
.

Graphic
representation
of
flashing
Check
Engine
light
fault
code
:
1221

-
;
5
Seconds
.
~-



2
.5;-

Fault
code
and
meaning



Corrective
action

Code
1286
:
Knock
control
test
pulse
(DME
3
.3
.1
only)



Check
DME
control
module
inputs/outputs
.
Control
module
may
be
faulty
Repair
Group
130

Code
1000
(light
remains
off)
:



End
of
fault
code
output-all
fault
codes
have
been
displayed
.
No

~
corrective
action
necessary
.
Repeat
test
if
necessary

Code
1444
:



No
more
faults
.
No
corrective
action
necessary
.
This
code
must
be
present
lo
erase
fault
memory

Basic
Requirements



Preventive
Maintenance

The
following
list
contains
basic
checks
that
should
be
made
when
experiencing
driveability
problems
.

1
.
Check
intake
(induction)
system
for
leaks
.
Check
for

cracked,
loose,
or
disconnected
hoses
and
duct
work
.

Check
that
all
hose
clamps
are
tight
.

NOTE-

An
air
leak
allows
unmeasured
airto
enter
the
engine,
offen
resulting
in
an
in
overly
lean
fuel
mixture
and
causing
driveability
problems
which
will
cause
the
Check
Engine
light
to
come
on
.

Table
d
.
OBD
I
Fault
(Blink)
Codes
(continued)

(1992-1995
models
only)

7
-
1
--------------
Check
Engine
light
on

ENGINE-GENERAL
100-
1
1

Check
Engine
light
off

The
condition
of
the
fuel,
ignition
and
emission
controlsys-

tem
components
has
a
directeffect
onengineperformance

and
driveability
.
BMW
specifies
maintenance
of
certain
parts

at
regular
intervals
lo
keep
the
engine
in
proper
tune
.
Extend-
ing
maintenance
intervals
beyond
the
time
or
mileagerecom-
mended
bythe
manufacturer
can
adversely
affect
the
way
the
engine
runs
.
When
troubleshooting
driveability
problems,
a
good
starting
point
is
to
perform
a
major
engine
service,par-

ticularly
if
one
is
overdue
.
For
maintenance
schedules,
major
engine
service
and
other
driveability-related
maintenance

procedures,
see020
Maintenance
Program
.

Basic
Engine
Settings

2
.
Check
that
the
battery
isin
good
condition
.
Check
that

the
cables
are
tight
and
free
of
corrosion
at
both
ends
.



Idle
speed,
idle
mixture
(%CO),
and
ignition
timing
are
not

Check
that
all
related
ground
points
are
firmly
connect-



adjustable
.
The
adaptive
engine
management
system
is
de-

ed
and
in
good
condition
.
Check
al¡
harness
connectors



signed
lo
automatically
compensate
for
changes
in
engine
op-

for
damage
and
corrosion
.



erating
conditions,
although
the
adaptive
range
is
limited
.

Once
these
limits
are
exceeded,
driveability
problems
usually

3
.
Check
for
prwer
and
ground
at
the
Engine
Control



become
noticeable
.

Module
(ECM)
.
Check
the
main
grounds
for
the
ECM
.

See130
Fuel
Injection
.



NOTE-

If
the
DME
adaptive
limits
are
exceeded,
the
Check
En-
4
.
Check
the
fuses
.
Check
for
sufficient
fuel
in
the
tank
.
If



gine
light
will
come
on,
indicating
an
emission
related
the
engine
ranout
of
fuel,
it
will
take
a
little
time
to
re-



fault
.
See
130
Fuel
Injection,
store
fuel
pressure
.
See
160
Fuel
Tank
and
Fuel

Pump
.
Oxygen
Sensors

5
.
Check
for
spark
at
the
spark
plugs
.
If
the
tachometer

needle
bounces
while
the
engine
is
crankedby
the



A
high
oxygen
level
in
the
engine
exhaust
indicates
a
lean

starter
then
the
ignition
system
is
probably
working
cor-



air-fuel
mixture
and
a
low
oxygen
level
indicates
a
rich
mix

rectly
.
See
120
Ignition
System
.



ture
.
The
oxygen
sensor,
shown
in
Fig
.
10,
measures
the
oxy-

gen
content
in
the
exhaust
gasand
generates
a
variable

6
.
Check
for
any
faults
through
the
On-Board
Diagnostics



voltage
signal
.
Using
that
feedback
signal
asan
input,
the

system
.
See
On-Board
Diagnostics
(OBD)
.



DME
control
module
fine
tunes
the
air-fuel
mixture
.

DRIVEABILITY
TROUBLESHOOTING

FUEL
INJECTION



130-
3

Fuel
metering
.
The
ECM
meters
fuel
bychanging
the



The
engine
management
system
compensates
automatical-
opening
time
(pulsewidth)
of
the
fuel
injectors
.
To
ensure
that



ly
for
changes
in
the
engine
due
to
age,
minor
wear
or
small
injector
pulsewídth
is
the
only
factor
that
determines
fuel
me-



problems,
such
as
a
disconnected
vacuum
hose
.
Asa
result,
tering,fuel
pressure
is
maintained
bya
fuel
pressure
regula-



idle
speed
and
mixture
do
not
need
lo
be
adjustedas
partof
tor
.
The
injectors
are
mounted
lo
a
common
fuel
supply
called



routine
maintenance
.
the
fuel
rail
.

The
ECM
monitors
engine
speed
to
determine
the
duration



NOTE-

ofinjector
openings
.
Other
signals
to
the
ECM
help
determine



Poordriveabilitymaybe
encountered
when
the
batteryis

injector
pulse
time
for
different
operating
conditions
.
A
tem-



disconnected
and
reconnected
.
when
the
battery
is
dis-
connected,
the
adaptive
memory
is
lost
The
system
will
perature
sensor
signals
engine
temperature
for
mixture
adap-



readaptafterabout
ten
minutes
of
drfving
.
tion
.
A
throttle
position
sensor
signals
throttle
position
.
The
exhaust
oxygen
sensor(s)
signal
information
about
combus-
tion
efficiency
for
control
of
the
air-fuel
mixture
.
1992
to
1995



DISA
(Dual
Resonance
Intake
System)
engines
are
equipped
with
a
single
sensor
.
1996
and
later
(OBD
II)
engines
are
equipped
with
an
oxygen
sensor
before



TheE36
4-cylinder
engine
is
equipped
with
a
dual
intake
andone
after
each
catalytic
converter
.
Forexample,the
M52



runner
system,
termed
DISA
.
DISA
offers
the
advantages
of
engine
is
equipped
withfour
oxygen
sensors
.



both
short
and
long
intake
pipes
.
Long
intake
runners
are
most
useful
at
low
to
medium
engine
rpm
for
producing
good
Idle
speed
control
.
ldle
speed
is
electronically
controlled



torque
characteristics
.
Short
intake
runners
produce
hígherviathe
idle
speed
control
valve,
which
maintains
idle
speed
by



horsepower
at
hígher
engine
speeds
.
bypassing
varying
amounts
of
air
around
theclosed
throttle
valve
.
Idle
speed
is
not
adjustable
.



NOTE-

Knock
(detonation)
control
.
Knock
sensors
monitor
and



The
term
DISA
comes
from
the
German
words
Differen-

control
ignition
knock
through
the
ECM
.
The
knock
sensors



zierte
Sauganlage,
and
can
roughlybe
translated
as
"dif-
fering
intake
manifold
configuration
."
See
100
Engine-
function
like
microphones
and
are
able
to
convert
mechanical



General
foradditional
information
on
DISA
operation
.
vibration
(knock)
into
electrical
signals
.
The
ECM
is
pro-

grammed
to
react
to
frequencies
that
are
characteristic
of
en-



Manifold
construction
:
The
intake
manifold
is
a
two-piece
gine
knock
and
adapt
the
ignition
timing
point
accordingly
.



metal
construction,
with
a
pair
of
runners
in
thetop
section
See120
Ignition
System
for
further
details
.



and
four
runners
in
the
lower
section
.
A
butterfly
valve
is
in-
stalled
in
the
lower
section,
enabling
the
DISA
solenoid
toiso-

NOTE-



late
one
pair
of
runners
from
the
other
pair
.
See
Fig
.
2
.

The
1992
M50
engine
is
not
equipped
with
knock
sen-



Operation
.
With
the
DISA
butterfly
valve
closed,
the
pipes
sors
.
All
other
engines
are
equipped
with
two
knock



in
thetop
half
of
the
manifold
act
together
with
the
ram
air
sensors
.



pipes
in
the
lower
halfto
producea
single,
long
air
intake
pipe
for
each
cylinder
.
See
Fig
.
3
.
The
column
of
aír
oscíllating
in

Basic
Engine
Settings



this
combined
pipe
significantly
increases
engine
torque
in
the

medium
rpm
range
.

Idle
speed,
idle
mixture
(%CO),
and
ignition
timing
arenot

adjustable
.
The
adaptive
engine
management
system
is
de-

signed
to
automatically
compensate
for
changes
in
engine
op-

eratingconditions,
although
the
adaptive
range
is
limited
.
Once

these
limits
are
exceeded,
driveability
problems
usually
be-

come
noticeable
.

Above
approximately
4,800
rpm,
the
butterfly
valve
between
the
intake
air
pipes
for
the
two
cylinder
groups
is
opened
.
The
shorter
pipes
in
the
lower
manifold
section
now
become
the

main
suppliers
of
ram
air
to
the
cylinders,yielding
greater
pow-

er
at
the
upper
end
of
the
engine
rpm
range
.
See
Fig
.
4
.

Control
components
.
The
DISA
butterfly
valve
is
actuated

NOTE-



electro-pneumatically
via
the
engine
control
module
(ECM)
.

lf
the
system
adaptive
limits
are
exceeded,
the
Check



The
valve
begins
to
open
as
engine
speed
rises
aboye
4,840

Engine
light
will
most
likely
come
on,
indicating
an



rpmand
closes
below
4,760
rpm
.
The
action
of
the
valve
is
de-
emissions-
related
fault
For
Check
Engine
light
diag-



liberately
delayed
to
prevent
it
from
opening
and
closing
repeat-
nostics,
see100
Engine-General
.



edly
within
a
short
time
.

GENERAL