1993 BMW 323i motor

Fig
.
9
.



Wiper
shaft
nut
at
cowl
(arrow)
.

Fig
.
10
.
Wiper
assembly
support
bolts
(arrows)
.

0012533
0012535

Fig
.
11
.
Wiper
assembly
electrical
connector
(arrow)
.

0012536

13
.
Push
wiper
arm
shaft
down
into
cowl
area
and
maneu-

ver
wiper
assembly
out
of
cowl
.

WIPERS
AND
WASHERS



611-
5

14
.
Installation
is
reverse
of
removal,noting
the
following
:

"
Install
all
fasteners
finger-tight
first
.

"
Once
installed,
wiper
motor
should
first
be
run
to

parked
position
and
switched
off
.

"
Next,
instaf
wiper
arms
butnotblades
.

"
Close
hood
and
fit
wiper
blades
.

"
Check
all
electrical
harness
fittings
and
sealing
grom-

mets
for
correct
reinstallation
.
Replace
any
wire
ties

cut
off
during
removal
.

Tightening
Torques

"
Wiper
shaft
nut
at
cowl
.............
12
Nm
(9
ft-Ib)

"
Wiper
support
to
wiper
assembly

orto
body
..
..
..
.
...............
10
Nm
(89
in-lb)

"
Wiper
arm
to
wiper
shaft
..........
25
Nm
(18
ft-lb)

Windshieldwiper
assembly,
removing
and

installing
(2-door
modeis)

NOTE-

The
wiper
arms
should
be
in
the
parked
position
before
removing
the
wiper
assembly
.
To
avoid
damaging
the
wiper
arms
and
pivots,
donotmanually
sidde
or
force
the
wiper
arm
across
the
windshield
.

1
.
Disconnect
negative
(-)cablefrom
battery
.

CAUTION-

"
Prior
to
disconnectiog
the
battery,
read
the
bat-
tery
disconnection
cautionsgiven
at
the
front
of
this
manual
on
page
viii
.

"
Use
fendercover
to
protect
windshield
.

2
.
Remove
wiper
arms
as
described
earlier
.

3
.
Place
engine
hood
in
service
position
.
See410
Fend-

ers,
Engine
Hood
.

4
.
Remove
trim
retainers
at
left
and
right
side
and
remove

air
plenum
grill
.
See
Fig
.
12
.

5
.
Remove
screws
retaining
wiring
harness
protective

cover
.
See
Fig
.
13
.

6
.
On
passenger
side
of
air
plenum,push
aside
wiring

harness
and
remove
two
screws
retaining
plenum

housing
.
See
Fig
.
14
.

WINDSHIELD
WIPER
ASSEMBLY

0012531Fig
.
16
.
Engine
control
unit
(ECM)
compartment
cover
screws
(ar-
rows)
.

WIPERS
AND
WASHERS



611-
7

Fig
.
18
.
Wiper
assembly
electrical
plug
(arrow)
.

uu1zbs6

13
.
Cover
inside
edges
of
cowi
panelsheet
metal
with
thick
tape
to
prevent
damaging
it
during
wiper
assembly
re-
moval
.

14
.
Wrap
protective
tape
around
wiper
shaft
on
driver
side
to
prevent
damaging
sheet
metal
during
removal
.

15
.
Push
wiper
arm
shaft
down
into
cowiarea
and
maneu-
ver
wiper
assembly
outof
cowi
.

16
.
Installation
is
reverse
of
removal,
keeping
in
mind
:

"
Install
all
fasteners
finger
tight
first
.

"
Torque
topfasteners
in
sequence
indicated
in
Fig
.
17
.

Then
tighten
wiper
assembly
support
bolts
inside
air

plenum
.
"
Wire
tie
wiper
harness
lo
wiper
assembly
support
in-

side
plenum
.

"
Once
installed
;
wiper
motor
should
first
be
run
to
parked
position
and
switched
off
.

"
Next,
insta¡¡
wiper
arms
butnot
blades
.

"
Close
hood
and
fit
wiper
blades
:

"
Check
all
electrical
harness
fittings
and
sealing
grom-

mets
for
correct
reinstallation
.
Replace
al]
wire
ties
cut

during
removal
.

CAUTION-

The
gaskets
and
sealing
grommets
at
the
ECM
compartment
cover
(passenger
sideof
bulkhead)
must
be
installed
correctly
to
keep
moisture
out
of
critica¡
electrical
componente
.

Fig
.
17
.
Wiper
assembly
mounting
fasteners
(arrows)
.



Tightening
Torques

"
Wiper
shaft
nut
at
cowi
..
.
.
..
.......
12
Nm
(9
ft-Ib)

11
.
Remove
wiper
assembly
support
.
Refer
to
Fig
.
10
.



"
Wiper
support
to
wiper
assembly

or
to
body
.........
...
..........
10
Nm
(89
in-lb)

12
.
Separate
harness
at
bulkhead
connector
.
See
Fig
.
18
.



-
Wiper
arm
to
wiper
shaft
..........
25
Nm
(18
ft-Ib)

WINDSHIELD
WIPER
ASSEMBLY

611-
8



WIPERS
AND
WASHERS

Windshieldwiper
motor,
removing
and
in-

stalling

1
.
Disconnect
negative
(-)
cable
from
battery
.



8
.
Install
wiper
arm
crank
in
straight
line
with
linkage
.
See

Fig
.
20
.

CA
UTION-

"
Prior
to
disconnectiog
the
battery,
read
the
bat-
tery
disconnection
cautions
given
at
the
front
of
this
manual
on
page
vi¡¡
.

"
Use
tendercover
to
protect
windshield
.

2
.
Remove
wiper
assembly
as
described
earlier
.

3
.
Remove
nut
on
wiper
motor
linkage
crank
and
remove

linkage
crank
from
motor
.
See
Fig
.
19
.

0012539

Fig
.
19
.
Wiper
linkage
crank
nut
(arrow)
and
wiper
motor
mounting
bolts
(A)
.

4
.
Unscrew
three
motor
to
assembly
mounting
bolts
and
remove
motor
.
Refer
to
Fig
.
19
.

5
.
Insta¡¡
new
motor
to
wiper
assembly
.
Do
not
insta¡¡

crank
.

6
.
Connect
motor
to
electrical
harness
.
If
necessary,
re-

connect
battery
temporarily
.

WINDSHIELD
WIPER
ASSEMBLY

7
.
Operate
motor,
then
turn
off
switch
.
Motor
will
stop
in

"park"
position
.

NOTE
-

When
installing
wiper
crank
onto
wiper
motor,
bracecrank
with
a
drift
pin
through
the
hole
on
crank
into
hole
onwiper
assembly
.

Fig
.
20
.
Align
wipercrank
with
linkage,
as
illustrated
.

9
.
Remainder
of
installation
is
reverse
of
removal
.

0012538

Tightening
Torques

"
Wiper
motor
to
wiper
assembly
(use
new
bolts)
.
..
..
10
Nm
(89
in-lb)

"
Wiper
motor
crank
to

wipermotor
(M8
nut)
......
..
.
...
.
27
Nm
(20
ft-Ib)

GENERAL

E36
cars
are
equipped
with
integrated
automatic
heating

and
air
conditioning
systems
.
Many
of
the
procedures
given
in

this
repair
group
require
that
the
A/C
refrigerant
charge
be

evacuated
using
specialized
equipment
.
See
A/C
System
Warningsand
Cautions
later
in
this
repair
group
.

HEATER
AND
CONTROLS

Blower
motor,
removing
and
installing

NOTE-

On
6-cylinder
cars,
the
plastic
top
enginecover
and
fuel
rail
covermustbe
removed
.
The
fuel
injectorhamess
re-
taining
screws
must
be
removed
and
the
harness
set
aside
.
The
engine
control
module
(ECM)
cover
must
be
removed,
the
control
unit
connectors
unplugged
and
the
harness
pulled
out
of
the
way
.
See
130
Fuel
Injection
.

1
.
Disconnect
negative
(-)
cable
from
battery
.

2
.
Open
hood
.
Unclip
engine
bulkhead
plenum
grille
at

base
of
windshíeld
and
remove
grille
.
See
Fig
.
1
.

HEATING
AND
AIR
CONDITIONING



640-1

640
Heating
and
Air
Conditioning

GENERAL
.
...
.
....
.
.
.
.
.
.
.
.
.
.......
.
.
.
640-1



Heater
andA/C
air
distribution
motor,

replacing(rotary-knob)
.
.
...
.
.
.
.......
.
640-10

HEATER
AND
CONTROLS
.
.....
.
.
.
.
.
.
.640-1



Rear
Window
Defogger
.
.
.



.
.
.
.
.
.
.
...
.
.
.
640-10
Blower
motor,
removing
and
installing
.
.
.
.
.
.
640-1



Rear
Window
Blower
(convertible
models)
.
.640-10

Blowermotor
resistor
pack,
replacing



.
.
.
.
.
.
640-3



AIR
CONDITIONING
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
640-11
Heater
valve,
replacing
...........
.
.
.
.
.
.
.
640-3

Heater
box,
removing
and
installing
.
.
.
.
.
.
.
.
640-4



A/CSystem
Warnings
and
Cautions
.
.
.
.
.
.
:640-11

Heater
core,
replacing
.....
.
.
:
....
.
.
.
.
.
.
.
640-6



A/C
compressor,
replacing
.
.
::.
:
:
.
.
.
.
.
.
.
.640-12

Heater
core
temperature
sensor,
replacing
.
.
640-7



A/C
Compressor
Clutch
.
.
.
.
.
.
.
:
.
.
.
.
.
.
.
.
.
640-13

Heater
andA/C
Control
Head
.
.
....
.
.....
.
640-7



A/C
condenser,
replacing
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
640-14

Heater
andA/C
control
head,
removing



A/C
receiver/drier,
replacing
.
.
.
.
.
.
.
.
.
.
.
.
.
640-15
and
installing
(rotary-knob)
.
.
....
.
......
640-7



A/C
expansion
valve,

Heater
andA/C
control
head,
removing



removing
and
installing
...
.
.....
.
.
.
.
.
.
.
640-16
and
installing
(digital-display)
.
.....
.
.....
640-8



A/C
evaporator,
removing
and
installing
.
.
..
640-17

Heater
andA/C
control
module,removing



A/C
evaporator
temperature
sensor,

and
installing
(rotary-knob)
.
.
...
.
.
.
.
.
.
.
.
640-8



replacing
.
.
.
.
.
.
..............
.
.
.
.
.
..
640-17

Heater
andA/C
control
module,removing



A/C
microfilter,
replacing
......
.
....
.
.
.
..
640-18

and
installing
(digital-display)
.
...
.
.
.
.
.
...
640-8

Sensor
fan
for
interior
temperature,



TABLES

replacing
.
.
.
....
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
640-9



a
.
Blower
Motor
Test
Values
.........
...
.
.
......
640-3

Heater
andA/C
AirDistribution
Motors
.
.
.
.
.
.
640-9



b
.
Heater
Core
Temperature
Sensor
Test
Values
...
.640-7

c
.
Evaporative
Temperature
Sensor
Test
Values
...
640-17

d
.
A/C
System
Fluid
Capacities
(total)
..
..........
640-18

0012527

Fig
.
1
.
Detach
grille
retaining
clips
(arrows)
and
pull
grille
upward
and
out
of
rubbergasket
.

CAUTION-

Prior
to
disconnectiog
the
battery,
read
the
battery
disconnection
cautionsgiven
at
the
front
of
this
manual
onpage
viii
.

HEATER
AND
CONTROLS

640-2



HEATING
AND
AIR
CONDITIONING

3
.
Remove
wiring
harness
retaining
clip
at
bulkhead
.
Re-

move
screws
retaining
wiring
harness
cover
and
pull

cover
forward
.
See
Fig
.
2
.

0012529

Fig
.
2
.
Ming
harness
cover
screws
at
base
ofwindshield
(arrows)
.

4
.
On
passenger
side,
push
aside
wiring
harness
and
re-

move
two
screws
retaining
plenum
housing
.
See
Fig
.
3
.

Fig
.
3
.



Ríghtside
plenum
retaining
screws
(arrows)
.

VU1L535

5
.
On
driverside,
push
aside
wiring
harness
and
remove

screw
retaining
plenum
.
Pull
plenum
up
and
remove
from
engine
bay
.
See
Fig
.
4
.

6
.
Unclip
blower
motor
housing
cover,
disconnect
control

cable,
and
turn
center
retainer
1
/4
turn
to
remove
cover
.
See
Fig
.
5
.

7
.
Disconnect
electrical
connectors
from
blower
motor
.

8
.
Remove
left
upper
section
of
blower
housingby
detach-
ing
spring
clipsat
edge
of
housing
.
See
Fig
.
6
.

HEATER
AND
CONTROLS

Fig
.
4
.



Remove
screw
at
A
and
pull
air
plenumupward
.

0012534

0012636

Fig
.
5
.



Blower
motor
housing
clips
(A)
;
control
cable
(B)
;
and
center
retainer(C)
.

i
[u6,

Fig
.
6
.



Spring
clips
(arrows)
on
driver
sideof
blower
housing
.

9
.
Release
blower
motor
retaining
strap
andremove
blow-
er
motor
and
fans
fromcowl
opening
.

NOTE-

Twist
and
rotate
blowermotor
assembly
to
facilítate
re-
moval
from
opening
.
If
the
blower
motor
is
to
be
rein-stafled,
use
care
not
to
damage
fan
wheels
during
removal
.
ff
the
blower
motor
fs
to
be
replaced,
cut
offfan
wheels
at
center
to
aid
in
removal
.

10
.
Installation
is
reverse
of
removal
.
When
installing
a
re-
placement
blower
motor,
instan
motor
into
cowlarea
before
installing
fan
wheels
.
Blower
motor
test
specifi-

cations
are
listed
in
Table
a
.

NOTE
-

On
replacementblowermotors
from
BMW,
thefan
wheels
come
unattached
to
aid
in
installation
.
Locatearrow
on
blower
motor
and
instan
fan
wheels
atthis
po-
sition
.
Be
sure
color
coolng
matches
.
Retain
fan
wheels
using
the
new
clips
.
See
an
authorized
BMW
parts
de-
partment
for
the
latest
parts
information
.

Table
a
.
Blower
Motor
Test
Values

Testingvoltage



13
VDC

Operating
voltage



9-15
VDC

Max
.
current
consumption
(approx
.)



12
amps

Maximum
speed



3,600-4,000rpm

Axialplay
(max
.
allowable)



1
.0
mm
(0
.04
in
.)

Blower
motor
resistor
pack,
replacing

The
blower
resistor
pack
is
clipped
into
the
upper
left
side
of
theheater
box
.

1
.
Remove
lower
left
dash
trim
panel
.
See513
Interior

Trim
.

2
.
Working
under
left
(driver's)
side
of
dash,
unclip
and

pulí
out
resistor
pack
from
sideof
heater
box
.
Remove

harness
connector
from
resistor
pack
.
See
Fig
.
7
.

3
.
Installation
is
reverse
of
removal
.

Heater
valve,
replacing

The
two-way
heater
valve
is
located
in
the
rear
of
the
engine

compartment
on
the
driver
side
.
The
solenoid
operated
valves

control
the
coolant
flow
through
the
dual-chamber
heater

core
.

1
.
Drain
engine
coolant
.
See
170
Radiator
and
Cooling

System
.

HEATING
AND
AIR
CONDITIONING



640-
3

uuiGO4I

Fig
.
7
.



Blower
fan
resistor
pack
(black
arrow)
and
resistor
pack
re-
ceptacle
(white
arrow)
below
left
sideof
dash
.

WARNING
-

Allow
the
cooling
system
to
cool
before
opening
ordraining
the
cooling
system
.

2
.
Disconnect
hoses
and
harness
connector
at
heater
valve
.
See
Fig
.
8
.

001[ó38b

Fig
.
S
.



Hoses
(A)
and
harnessconnector
(B)
at
heatervalve
.

3
.
Carefully
pull
heater
valve
out
of
rubber
mounting
and

pull
up
and
out
of
engine
compartment
.

4
.
Installation
is
reverse
of
removal
.
Use
new
hose

clamps
.
Inspect
hoses
and
replace
asnecessary
.

HEATER
AND
CONTROLS

640-4



HEATING
AND
AIR
CONDITIONING

Heater
box,
removing
and
installing

The
heater
box,
located
underneath
thecenter
of
the
dash-

board,
houses
theheater
core,
the
A/C
evaporator,
and
asso-

ciated
sensors
and
actuators
.
Removal
of
theheater
box

requires
that
the
A/C
refrigerant
be
discharged
.

CAUTION-

"
Removing
the
heater
box
requires
evacuating
the
AIC
system
.
DO
NOT
attempt
this
procedure
without
proper
tools
and
training
.

"
Any
person
who
services
a
motor
vehicle
air
con-

ditioner
must,
by
law,
be
properly
trained
and
cer-
tified,
and
use
approved
refrigerant
recycling
equipment
.
Technicians
must
complete
an
EPA-
approved
recycling
course
to
be
certified
UU12639

Fig
.
10
.
Heater
core
mounting
nuts
at
left
sideof
bulkhead
(arrow)
.

1
.
Drain
engine
coolant
.
See
170
Radiator
and
Cooling



wiper
assembly
shown
removed
for
clarity
.

System
.

2
.
Remove
complete
dashboard
.
See513
Interior
Trim
.

3
.
Remove
blower
motoras
described
earlier
.

4
.
Remove
nut
retaining
water
hose
flange
to
rear
bulk-
head
.
I'ush
flange
to
one
side
.
See
Fig
.
9
.

Fig
.
9
.



Nut
retaining
coolant
hose
flangeat
bulkhead
(arrow)
.

NOTE-

Clear
any
remaining
coolant
from
the
heater
core
by
blowing
compressed
air
finto
the
coolant
feed
hose
.

HEATER
AND
CONTROLS

0012638b

6
.
Cut
wire
tie
holding
wire
harness
to
heater
box
and
dis-

connect
cable
harness
connector
from
heater
box
.
See

Fig
.
11
.

0012647

Fig
.
11
.
Harness
connectors
(A)
and
cable
tie
(B)
at
heaterbox,
under
driver
side
dash
.

7
.
Followingmanufacturer's
instructions,
connect
ap-

proved
refrigerant
recovery/recycling/recharging
unitto

A/C
system
and
discharge
system
.

8
.
Unbolt
A/C
refrigerantlines
flange
from
engine
bay
bulkhead
.
See
Fig
.
12
.

9
.
On
models
with
rotary-knob
A/C
control
head
:
Discon-
5
.
Remove
nuts
from
heater
box
retaining
bracket
on
en-



nect
wiring
harness
connectors
to
A/C
control
module
gine
bulkhead
left
side
.
See
Fig
.
10
.
Repeat
procedure



in
center
console
and
remove
module
.
See
Fig
.
13
.
for
right
side
nuts
.

Sensor

fan

Fig
.
25
.
Digital
display
A/C
control
head
components
.

2
.
Unscrew
left
and
right
screws
retaining
control
head
to
control
module
.
Press
retaining
clips
and
release
front
plate
from
control
head
.
Remove
A/C
control
module
from
control
head
housing
.

Sensor
fan
for
interior
temperature,

repiacing

A
small
electricfan,installed
in
the
A/C
control
head,
draws
cabin
air
past
the
climate
control
temperature
sensor
.

1.
Remove
A/C
control
head
as
described
earlier
.

2
.
Rotary-knob
control
head
:
Disconnect
electrical
con-
nector
from
top
of
control
head
housing
.
Pry
open
plas-

tic
housing
and
remove
sensor
fan
.
See
Fig
.
26
.

0013181

Fig
.
26
.
Sensor
fan
(A)
and
harness
(B)
in
back
of
A/C
control
head
(rotary-knob
control
head
shown)
.

3
.
Digital
display
models
:
Disconnect
electrical
harness

connector
from
control
head
housing
.
Remove
screws

holding
sensor
fan
to
bottom
of
control
moduleand
re-
move
.
Refer
to
Fig
.
25
.

4
.
Installation
is
reverse
of
removal
.

HEATING
AND
AIR
CONDITIONING



640-
9

Heater
and
A/C
Air
Distribution
Motors

The
recirculation,
fresh
air
and
othervent-duct
flaps
are
controlled
electrically
via
a
series
of
air
distribution
actuating
motors
.
Cars
with
the
rotary-knob
control
head
use
three
elec-
tromechanical
motors,
each
held
in
place
via
a
small
plastic
clip
.
See
Fig
.
27
.

Rightside
of
heater
box
l

Fig
.
27
.
Location
of
early
production
air
distribution
motors
(arrows)
.

Later
systems
(with
the
digital
display
control
head)
use
five
distribution
motors,
four
of
which
are
digítally
controlled
.
See
Fig
.
28
.

HEATER
AND
CONTROLS