1993 BMW M3 limited slip

010-
8



FUNDAMENTALSFORTHE
DO-ITYOURSELF
OWNER

TOOLS

Mostmaintenance
can
be
accomplished
with
a
small
selec-
tion
of
the
right
tools
.
Toolsrange
in
quality
from
inexpensive
junk,
which
may
brakk
at
first
use,
tovery
expensive
and
well-
made
tools
for
the
professional
.
The
best
tools
for
most
do-it
yourself
BMW
owners
He
somewhere
in
between
.



O

Many
reputable
tool
manufacturers
offer
good
quality,
mod-
erately
priced
tools
with
a
lifetime
guarantee
.
These
are
your
best
buy
.
They
cost
a
little
more,
but
they
are
good
quality
tools
that
will
dowhat
is
expected
of
them
.
Sears'
Craftsman®
line
is
one
such
source
of
good
quality
tools
.

Some
of
the
repairs
covered
in
this
manual
require
the
use
of
special
tools,
suchas
a
custom
puller
or
specialized
electrical
test
equipment
.
These
special
tools
are
called
out
in
the
text
andcan
be
purchased
through
an
authorized
BMW
dealer
.
As
an
alternative,
some
special
tools
mentioned
may
be
pur-
chased
from
the
following
tool
manufacturers
andlor
distribu-
tors
:

"
Assenmacher
Specialty
Tools
6440
Odell
Place,Boulder,
CO
80301
(303)
530-2424

"
Baum
Tools
Unlimited
.
Inc
.
PO
.
Box
87,
Longboat
Key,
FL
34228
(800)
848-6657

"
Schley
Products
Inc
.
5350
E
.
Hunter
Ave
.,
Anaheim
Hills,
CA
92807
(714)
693-7666

"
Zelenda
Machine
and
Tool
Corp
.
66-02
Austin
Street,
Forest
Hills,
NY
11375
(718)
896-2288

Basic
Tool
Requirements

The
basic
hand
tools
described
below
canbe
used
to
accom-
plish
most
of
thesimple
maintenance
and
repair
tasks
.

Fig
.
8
.



Types
of
wrench
heads
.
From
left,
open-end,
12-point
box-
Screwdrivers
.
The
common
fíat-blade
type
and
the
Phillips



end,6-point
box-end,
fiare
nut
.
type
will
handlealmost
all
screws
used
on
BMWs
.
Two
orthree
different
sizes
of
each
type
will
be
required,
since
a
screwdriver



The
cómbination
wrench
is
the
most
universal
.
It
hasone
of
the
wrong
size
will
damage
the
screw
head
.
See
Fig
.
7
.



open-end
andone
box-end
.
10mm
and
13mm
wrenches
arethe
most
common
sizes
needed
.
A
more
complete
set
of
A
complete
set
of
screwdrivers
should
also
include
Torx@



wrenches
would
inciude
6mm
through
19mm
sizes
.
typescrewdrivers
.

Wrenches
.
Wrenches
come
in
different
styles
for
different
uses
.
Fig
.
8
shows
several
.
The
basic
open-end
wrench
is
the
most
widely
used,
but
grips
on
only
two
sides
.
It
can
spread
apart
and
slip
off
more
easily
.
The
box-end
wrench
has
better
grip,
on
al¡
six
sides
of
a
nut
or
bolt
.

A
12-point
box-end
can
loosen
a
nut
or
bolt
where
there
is
less
room
for
movement,
while
a
6-point
box-end
provides
bet-
ter
grip
.
Forhex
fasteners
on
fluid
lines,
like
brake
lines
and
fuel
lines,
a
fiare-nut
wrench
offers
the
acivantages
of
a
box-end
wrench
with
a
slot
that
ailows
it
to
fit
over
the
line
.

TOOLS

B005FNG

Fig
.
7
.



Common
flat-blade
(top)
and
Phillips
(bottom)
screwdrivers
.
Offset
screwdríver
(right)
is
used
for
screws
with
limited
ac-
cess
.

B002FNG

Sockets
.
Socketsperform
the
same
job
asbox-end
wrench-
es,
but
offer
greater
flexibility
.
They
are
used
with
a
ratchet
han-
dle
for
speed
and
conveniente
and
can
be
combined
with
extensions
and
universal
joints
(swivels)
to
reach
fasteners
more
easily
.
Sockets
come
with
different
size
connections
to
drive
handies
or
extensions,
called
the
drive
size
.
The
most
common
drive
sizes
are
1
/4
in
.,
318
in
.,
and
1
/2
in
.

Sockets
come
in
6-point
and
12-point
styles
.
For
use
with
a
ratchet,
the
6-point
offers
a
better
grip
on
tight
nuts
and
bolts
.
6mm
to
19mm
sockets
arethe
most
needed
sizes
.
Below
is
a
list
oftypical
bolt
diameters
and
the
corresponding
wrench
siz-
es
.

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
.

020-
1
8



MAINTENANCE
PROGRAM

Fig
.
25
.
Inspect
brake
pads
with
the
caliper
removed
.
Minimum
brake
pad
thickness
shown
by
dimension
(A)
.

NOTE-

The
parking
brake
may
lose
some
of
its
effectiveness
if
it
is
not
used
frequently
.
This
is
due
to
corrosion
build-
up
on
the
parking
brake
drum
.
To
remove
corrosion,
ap-
plythe
parking
brake
just
until
it
begins
togrip,
then
pulí
the
lever
up
one
more
stop
(click)
.
Drive
thecar
approx-
imately
400
meters
(1,300
ft
.)
and
release
the
brake
.
To
recheck
the
adjustment
of
the
parking
brake
see340
Brakes
.

UNDER-CAR
MAINTENANCE

0011920

Manual
transmission
fluid,

checking
and
filling

The
manual
transmission
fluid
leve¡
should
be
checked
at

specified
intervals
.
Check
and
fill
the
transmission
with
the
car

ona
leve¡
surface
.
Transmission
(luid
leve¡
checking
and
re-

placement
procedures
are
covered
in
230
Manual
Transmis-

sion
.

Automatic
Transmission
Service

The
automatic
transmission
is
not
equipped
with
a
dipstíck
.

Therefore,
checking
the
ATF
level
is
an
ínvolved
procedure,

which
includes
measuring
and
maintaining
a
specified
ATF

temperature
during
the
checking
procedure
.

For
more
complete
ATF
service,
including
checking
ATF
lev-

e¡
and
ATF
filter
replacement
procedures,
see
240
Automatic
Transmission
.

Front
suspension
and
steering
linkages,

inspecting

Inspection
of
the
front
suspension'and
steering
includes
a
check
of
all
moving
parts
for
wear
and
excessive
play
.
Also
in-

spect
the
rubber
seals
and
boots
for
cracks
or
tears
that
could

allow
the
entry
of
dirt,
water,
and
other
contaminants
.
See
310

Front
Suspension
.

Exhaust
system,
inspecting



Rear
suspension,
inspecting
Exhaust
system
life
varies
widely
according
to
driving
habits



Final
drive
and
rear
drive
axle
service
consists
of
checking

and
environmental
conditions
.
If
short-distance
driving
pre-



and
changing
the
gear
oil,
inspecting
for
leaks,
and
checking
dominates,
the
moisture
and
condensation
in
the
system
will



the
rear
drive
axle
rubber
boots
for
damage
.
not
fully
dryout
.
This
will
lead
to
early
corrosion
damage
and
more
frequent
replacement
.
The
areas
where
leaks
are
most
likely
to
occur
are
around
the
driveshaft
and
drive
axle
mounting
flanges
.
For
more
infor

Scheduled
maintenance
of
the
exhaust
system
is
limitedlo



mation
on
ídentifying
oil
leaks
and
their
causes,
see330
Rear
inspection
.
Check
for
restrictions
due
to
dents
or
kinks
.
Check



Suspension
.
for
weakness
or
perforation
due
to
rust
.
Check
lo
see
that
all
the
hangers
are
in
place
and
properly
supporting
the
system
and
that
the
system
does
not
strike
the
body
.
Alignment
of
the
sys-



Final
drive
oil
leve¡,
checking

temand
the
location
of
the
hangers
aredescribed
in
180
Ex-
haust
System
.



Check
the
lubricant
leve¡
with
thecar
level
.
Remove
the
oil
filler
plug
.
The
leve¡
is
correct
when
the
fluidjust
reaches
the

edge
of
the
filler
hole
.
Install
and
tighten
the
oil
filler
plug
when
Manual
Transmission
Service



the
oil
level
is
correct
.
See
Fig
.
26
.

Manual
transmissionservice
consists
of
inspectingfor
leaks



The
final
drive
should
be
filled
with
a
special
BMW
lubricant
and
checking
and
changing
the
fluid
.



available
through
an
authorized
BMW
dealer
.
In
addition,
the
lubricant
type
varies
depending
onwhether
or
nota
limited-slip
Evidence
of
transmissionleaks
is
fkely
to
beseenaround
the



differential
is
fitted
.
driveshaft
mounting
flange
and
at
the
bottom
of
the
bellhousing
.
For
more
information
on
identifying
oil
leaks
and
their
causes,
see230ManualTransmissionand210
Clutch
.



Tightening
Torque

"
Finaldrive
filler
plug
to
final
drive
housing
..................
70
Nm
(52
ft-Ib)

GENERAL
......
.
.
.
.
.
.
.
.....
.
.
.
.
.
.
.
.
.
.
331-1



Final
Drive
Oil
Seals



.
.
...
.
.
.
.......
.
.
.
.
.
331-1

Finaldrive
flange
oil
sea¡,
replacing
....
.
.
.
..
331-2

FINAL
DRIVE
SERVICE
.
.....
.
.
.
.
.
.
.
.
.
.
331-1



Finaldrive
inputshaft
oil
seal,
replacing
.
.
.
.
.
331-3

Final
drive
oí¡,
draining
and
filling
.
.
.
.
.
.
.
.
.
.
331-1



Finaldrive
unit,
removíng
and
installing
.
.
.
.
.
.
331-3

GENERAL

This
repa¡r
group
covers
repair
operations
that
do
not
re-

quire
complicated
disassembly
of
the
final
drive
.
Internal
re-

pairs
and
final
drive
disassembly
are
not
covered
in
this

manual
.

FINAL
DRIVE
SERVICE

Al¡
final
drive
work
requires
some
method
of
raising
thecar

and
supporting
it
securely
while
the
work
is
performed
.
Jack

stands
and
a
floor
jack
can
easily
be
used,
but
use
extreme

caution
when
working
beneath
the
car
.
See010
Fundamen-

tais
for
the
Do-It-Yourself
Owner
.

NOTE-

Removal
of
final
drive
carrier
is
covered
in
330
Rear
Suspension
.

Final
drive
oil,
draining
and
filling

1
.
Drive
car
to
warm
final
drive
fluid
.

2
.
Raise
car
and
support
safely
.

WARNING
-

Make
sure
that
thecar
is
firmly
supported
on
jack
standsdesigned
for
the
purpose
.
Place
the
jack
standsbeneatha
structural
chassis
point
.
Do
not
place
jack
stands
under
suspension
parts
.

5
.
Fill
final
drive
with
appropriate
type
and
quantity
of
lu-

bricant
.
Insta¡¡
and
tighten
fill
plug
.

331
Final
Drive

0

Fig
.
1
.



Final
drivedrain
plug
(A)
and
fill
plug
(B)
.

D

NOTE-

The
final
drive
fluid
level
is
correct
when
the
fluid
begins
to
spill
from
the
fill
plug
.

Final
Drive
Oil
Seals

FINAL
DRIVE



331-1

0013113

Final
DriveDrain
and
Fill

"
Oil
specifications

w/o
limited
slip



.
.......
BMW
SAF-XO
Synthetic
Oil

with
limited
slip
.
......
BMW
SAF-XIS
Synthetic
Oil

"
Final
drive
oil
capacity

4-cylinder
.
.
.
...
................
1
.1
liters
(1
.2
qt)

6-cylinder
.
.
.
...
................
1
.7liters(1.8
qt)

3
.
Place
a
drain
pail
below
final
drive
andremove
drain

and
fill
plugfrom
final
drive
.
See
Fig
.
1
.



Low
oil
level
caused
by
faulty
oil
seals
may
be
the
cause
of

noisy
final
drive
operation
or
limited-slip
chatter
.
The
drive

NOTE-



flange
(side)
and
inputshaft
(front)
oil
seals
can
be
replaced

"
Use
a14
mm
alíen
bit
socket
to
remove
the
drain
plug
.



while
the
final
drive
is
installed
.

Alternatively,
cut
approximately
30
mm
(1
.2
in)
from

an
alíen
key
and
usea
box
end
wrenchon
the
key



NOTE-
stub
.
Do
not
mistake
leaking
CV
joints
for
flangeseal
leaks
.

4
.
Install
and
tighten
drain
plug
.



It
may
be
helpful
to
degrease
the
final
drive
to
pinpoint
the
source
of
the
leak
prior
to
replacing
seals
.

FINAL
DRIVE
SERVICE