engine BMW 323Ci CONVERTIBLE 2000 E46 Service Manual

138n
The BMW Maintenance System has
been designed as a reliable means for
providing maximum driving and operat-
ing safety – and as cost effectively as
possible for you. Once again, with re-
spect to the previous version, mainte-
nance costs were able to be reduced
due to technical innovations.
Please keep in mind that regular main-
tenance is not only necessary for the
safety of your vehicle, but also plays
a significant role in maintaining its
resale value.
Service Interval DisplayAdvanced technology is employed to
calculate the optimal maintenance in-
tervals. These are then indicated in the 46cus018
Service Interval Display. While conven-
tional systems rely on distance traveled
alone to determine when service is due,
the BMW Maintenance System has for
years considered the actual conditions
under which the vehicle operates, be-
cause miles can be traveled in many
different ways:
From a maintenance point of view,
62,000 miles (100,000 km) of short-dis-
tance urban driving are not the same as
62,000 miles (100,000 km) of long-dis-
tance highway driving.
In response to this fact, the BMW Main-
tenance System monitors operating
conditions as the basis for determining
the optimum service intervals for your
individual vehicle. The BMW Mainte-
nance System includes the Engine Oil
Service and Inspections I and II.
Determining maintenance intervals ac-
cording to the actual use of the vehicle
covers every kind of operating situation.
Even those who drive very little – signif-
icantly less than 6,000 miles (10,000 km)
annually – should still have the engine oil
changed at least every 2 years because
engine oil deteriorates over time, re-
gardless of the amount of wear and tear
to which it has been subjected.
Service and Warranty Information
Booklet (US models)/Warranty and
Service Guide (Canadian models)For additional information on mainte-
nance intervals and procedures, please
refer to the Service and Warranty Infor-
mation Booklet (US models) or to the
Warranty and Service Guide (Canadian
models).
As a precaution against rust, it is advis-
able to have the body checked for dam-
age from rocks or gravel at the same
time, depending upon operating condi-
tions.
Have your BMW center perform
maintenance and repair.
Your BMW center is always up-to-date
on the latest maintenance work and re-
pair techniques and equipped with the
required special tools. In addition,
checking parts known from experience
to be subject to wear is a permanent
part of the maintenance specifications.
Be sure that all maintenance work is
confirmed in the Service and Warranty
Information Booklet (US models) or the
Warranty and Service Guide (Canadian
models). These entries will constitute
your proof that the vehicle has received
regular maintenance. They are also
required for warranty claims.<
The BMW Maintenance System

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IndexDataTechnologyRepairsCar careControlsOverview
Vehicle storage
If you intend to store the vehicle
for more than three months, have
the maintenance operations described
on this page performed.<
Preparations for storageHave your BMW center perform the fol-
lowing procedures:
1 Clean and apply a rustproofing agent
or other treatment to the engine,
engine compartment, undercarriage,
axles and major components in ac-
cordance with approved repair pro-
cedures. Washing the vehicle, any in-
terior cleaning and subsequent paint-
and chrome care, and cleaning any
rubber seals for the hood and doors,
should be carried out in compliance
with approved procedures as well
2 Change engine oil and oil filter at op-
erating temperature. As an additional
corrosion protection measure, an an-
ticorrosive agent can be added to the
engine when refueling in accordance
with the manufacturer's instructions
3 Check the coolant level and concen-
tration and top off if necessary
4 Fill the fuel tank completely to pre-
vent the formation of condensation
5 Increase the tire inflation pressure to
51 psi (350 kPa).
Before parking the vehicle1 Dry the parking brake and footbrakes
completely to keep the brake discs
and drums from corroding
2 Park the vehicle in a covered, dry,
and well-ventilated space. Place the
transmission in first gear or set the
selector lever to the "P" position.
Chock the wheels to prevent the ve-
hicle from rolling if necessary. Do not
apply the parking brake
3 Remove the battery, charge it com-
pletely and store it in a cool (but
frost-free) room
4 Remove the hardtop
* and store it
separately. Refer to page 121
5 Close the convertible top.
During storageRecharge the battery every six months.
If it is not recharged, it will not be ser-
viceable. Every time the battery drains,
especially over extended periods, its
service life is reduced.
Removing the vehicle from
storageRecharge the battery if the "Magic
Eye"
* turns black. Refer to page 162.
Then have Inspection I performed by
your BMW center, including a brake
fluid replacement if necessary. Refer to
the Service and Warranty Information
Booklet (US models) or the Warranty
and Service Guide (Canadian models).

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Technical modificationsAny BMW center will be glad to inform
you of the advisability, legal require-
ments and factory recommendations
regarding technical modifications on
your vehicle. For this purpose, the
BMW center will require the Vehicle
Identification Number and, in some
cases, the engine number as well.
Light-Emitting Diodes (LEDs)Light-emitting diodes installed behind
translucent lenses serve as the light
source for many of the controls and dis-
plays in your vehicle. These LEDs re-
semble conventional lasers and are
classified by law as "Class 1 light-emit-
ting diodes".
Do not remove the protective lens
and avoid staring directly at the
unfiltered beam for extended periods
(several hours). To do so could result in
inflammation of the iris.<

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IndexDataTechnologyRepairsCar careControlsOverview
OBD interface socket The interface socket for the onboard
diagnostics is located on the driver's
side at the left-hand bottom of the
dashboard and under a cover. The
cover has the letters "OBD" on it.
The purpose of the OBD system is to
ensure proper emission control system
operation for the life of the vehicle by
monitoring emission-related compo-
nents and systems for deterioration and
malfunction.460us250
An illuminated indicator informs
you of the need for service, not
that you need to stop the vehicle.
Your system should be checked by your
BMW center at the earliest possible
opportunity.
If the indicator blinks or flashes, this
indicates a high level of engine misfire.
Reduce speed and contact your near-
est BMW center immediately. Severe
engine misfire over only a short period
of time can seriously damage emission
control components, especially the
catalytic converter.
Warning lamp: "Service Engine
Soon" for Canadian models
When the fuel filler cap is not pro-
perly tightened, the OBD system
can detect the vapor leak and the indi-
cator will light up. If the fuel filler cap is
then tightened, the indicator will usually
go out after a short period of time.<

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IndexDataTechnologyRepairsCar careControlsOverview
Lamps and bulbsThe illustration shows the left-hand side
of the engine compartment.1 Low beams H7 bulb, 55 watts2 High beamsH7 bulb, 55 watts
The H7 bulb is pressurized. There-
fore, wear safety glasses and pro-
tective gloves. Failure to comply with
this precaution could lead to injury if
the bulb is accidentally damaged during
replacement.<
1 Turn the bulb holder to the left and
remove it
2 Remove and replace the bulb.460de130
When cleaning the headlamps,
please observe the following:
Do not clean by wiping with a dry cloth
(scratches). Never use abrasives or
strong solvents to clean the covers.
Remove dirt and contamination (such
as insects) by soaking with BMW Car
Shampoo and then rinsing with plenty
of water. Always use a deicer spray to
remove accumulated ice and snow –
never use a scraper.<
Xenon lamps
*
The service life of these bulbs is very
long and the probability of a failure is
very low, provided that they are not
switched on and off an unusual number
of times. If one of these bulbs should
nevertheless fail, it is possible to con-
tinue driving with great caution using
the fog lamps, provided traffic laws in
your area do not prohibit this.
Because of the extremely high
voltages involved, any work on the
lighting system should be performed
only by technicians with the appropriate
qualifications. Failure to comply with
this creates a risk of fatal injury.<

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Lamps and bulbsThe illustration shows the left-hand side
of the engine compartment.Parking lamps5 watt bulb
1 Turn the bulb holder to the left (arrow)
and remove it
2 Remove and replace the bulb.460de171
Front turn signal indicator 21 watt bulb
1 Using a screwdriver, release the inner
hook by going through the upper
opening
2 Remove the lamp by pulling it toward
the front
3 Applying light pressure, turn the bulb
to the left. Remove and exchange the
bulb462de261
4 Insert the 2 pins on the lamp into the
guides on the vehicle
5 Push the lamp in. Carefully apply
pressure until you hear it engage.462de262

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IndexDataTechnologyRepairsCar careControlsOverview
Changing a wheel
Safety measures in the event of a
flat tire or wheel change:
Stop the vehicle as far as possible from
passing traffic. Park on a firm, flat sur-
face. Switch on the hazard flashers.
Turn the steering wheel to the straight-
ahead position, remove the key and en-
gage the steering lock. Shift into 1st or
reverse (selector lever in "Park" with au-
tomatic transmission) and engage the
parking brake.
Have all passengers leave the vehicle
and remain well away from your immedi-
ate working area (behind a guardrail, for
instance).
If a warning triangle
* or portable hazard
warning lamp is available, set it up on
the roadside at an appropriate distance
from the rear of the vehicle. Comply with
all safety guidelines and regulations.
Change the wheel only on a level, firm
surface that is not slippery. Avoid jack-
ing the vehicle on a soft or slippery sup-
port surface (snow, ice, loose gravel,
etc.), as it could slide sideways.
Position the jack on a firm support sur-
face.
Do not place wooden blocks or similar
objects under the jack, otherwise, the
jack might not be able to reach its full
support capacity because of the limited
height.
Do not lie under the vehicle or start the
engine when the vehicle is supported by
the jack. Failure to comply with this cre-
ates a risk of fatal injury.<
Your BMW has a space-saver spare
tire for temporary use to ensure your
mobility.
To remove the space-saver spare
tire, lift the floor panel in the lug-
gage compartment completely out
(refer to page 41).<
What you will needIn order to avoid rattling noises later,
note the position of the tools when you
remove them and return them to their
original position when you are through
using them.
>Jack (1)
Raise the floor panel in the luggage
compartment (refer to page 41) and
unscrew the red wing nut (arrow).
When you have completed your work,
screw the jack all the way back down.
Fold the handle back and insert it into
its holder
>Wedge (2)
The wedge, or wheel chock, is lo-
cated behind the jack on the luggage
compartment's rear wall. Loosen the
wing nut to remove it46cde038

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BatteryRemoval and installation
Do not disconnect the battery when
the engine is running. If you do so,
the ensuing voltage surge will damage
the vehicle's onboard electronics.
Do not make any modifications in the
wires to the positive terminal. If you do
so, the protective function of the safety
battery terminal is no longer ensured.
Repair and disposal must be performed
by trained technicians only.<
When removing the battery, disconnect
the cable on the negative terminal first,
then the cable on the positive terminal.
Loosen the center adjusting screw on
the battery retaining strap (use the
screwdriver included with the onboard
tool kit) and disconnect the strap.
When installing a battery, connect the
positive terminal first, then connect the
negative terminal.
When installing a battery, be sure
that it is mounted properly and that
the retaining bracket is installed with the
center adjustment screw, otherwise, the
battery will not be adequately secured
in case of an accident.<
Charging the battery Charge the battery in the vehicle only
when the engine is not running.
Before performing any work on
the electrical system, be sure to
unclamp the cable from the battery's
negative terminal. Failure to do so can
result in short-circuits, a fire or per-
sonal injury.<
If you plan to park the vehicle for longer
than 4 weeks, disconnect the battery
from the vehicle's electrical system by
disconnecting the cable at the negative
terminal. Then recharge the battery with
an appropriate battery charger.
If you intend to store the vehicle for
longer than 12 weeks, remove the bat-
tery, charge it and store it in a cool and
dust-free room where there is no dan-
ger of freezing. During storage, have
the battery recharged every 3 months.
Also, recharge the battery before it is
reinstalled. If this is not done, the bat-
tery will not be serviceable. Every time
the battery is drained, especially over
extended periods, its service life is
reduced.
Return used batteries to a recy-
cling point or your BMW center.
Maintain the battery in an upright posi-
tion for transport and storage. Secure
the battery to prevent it from tilting
during transport.<
Storage periods during which
the battery is disconnected are
not taken into consideration by the
Service Interval Display for changing
the brake fluid.
For this reason, be sure that the brake
fluid is changed every two years, re-
gardless of the information displayed.
Read and comply with the information
on page 136 covering this subject.<

168n
Do not use spray starter fluids to start
the engine.
If the battery is drained, the engine can
be started using two jumper cables and
another vehicle's battery. Use only
jumper cables with fully insulated
handles on the terminal clamps.
Do not touch the parts conducting
electrical current while the engine
is running. Failure to comply with this
creates a risk of fatal injury.<
Carefully comply with the following in-
structions to avoid personal injury or
damage to one or both vehicles:
1 Be sure that the battery on the sup-
port vehicle is also rated at 12 volts,
and that the capacities of the two
batteries (Ah) are roughly comparable
(printed on casing)
2 Leave the drained battery connected
to the vehicle's electrical system
3 Make sure that there is no contact
between the bodywork of the two
vehicles – short circuit risk!
4 Start by connecting the jumper cable
from the positive terminal of the sup-
port vehicle to the positive terminal
connector located in your BMW's
engine compartment. The cover of
the auxiliary terminal for jump-start-
ing is identified by a "+" sign. Refer to
the illustration. Remove by pulling the
tab (arrow 1)
5 Then connect the negative terminals.
Attach the cable to either the support
vehicle's negative battery terminal (–),
or to a suitable ground on its engine
or bodywork. Then connect the other
end of the cable to a ground on the
engine or on the bodywork of the ve-
hicle that is to be started. There is a
special nut provided for this on the
BMW (arrow 2)
Follow the same sequence for
connecting the jumper cables
when helping other vehicles. If you do
not, there is the risk of injury if sparks
are generated at the battery.<462de253
6 Start the support vehicle's engine
and let it run
7 Start the engine on the vehicle need-
ing the jump-start, and allow it to run
as usual. If the first start attempt is
not successful, wait a few minutes
before another attempt in order to
allow the drained battery to recharge
8 Before disconnecting the jumper
cables from your BMW, turn on the
rear window defroster and set the
blower to the highest speed; allow the
engine to run approx. 10 seconds.
This will prevent a voltage surge from
the voltage regulator to the electrical
accessories
9 Then disconnect the jumper cables in
reverse sequence.
Depending on the reason for the mal-
function, recharge the battery.
Jump-starting

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For vehicles with automatic transmis-
sion
*, Adaptive Transmission Control
(ATC) makes the optimum gear selec-
tion based on a number of factors. In
this process, it considers your individ-
ual driving style as well as current
driving conditions.
ATC recognizes your personal driving
style from the positions and movements
of the accelerator pedal, deceleration
when braking, and lateral acceleration
through curves. ATC makes the appro-
priate selection based on various shift
characteristics, which range from com-
fort- to performance-oriented.
46cus020
In order to include driving conditions in
its calculations, ATC registers curves
and both uphill and downhill gradients.
For example, if you maintain speed
through a curve, the transmission does
not shift up.
On uphill gradients, it shifts up only
when the engine speed increases in
order to make more efficient use of
power reserves. On downhill gradients,
ATC shifts down when the speed of the
vehicle increases and the driver must
apply the brakes.
ATC
*