engine BMW M3 COUPE 2003 E46 Owner's Guide

114In the engine compartment
HoodTo releasePull the lever located under the left-
hand side of the instrument panel.
Do not attempt to service your
vehicle if you do not have the
required technical background. Failure
to work in an informed, professional
manner when servicing components
and materials constitutes a safety haz-
ard for vehicle occupants and other
road users. If you are not familiar with
the guidelines, please have the opera-
tions performed by your BMW center.<
To openPull the release handle and open the
hood.
It is not possible to drive off using
SMG II when the hood is open.<
To closePull the hood downwards and allow it to
fall from a minimum height of 1 ft/30 cm
so that it audibly engages. Check for
proper locking by pulling on the hood at
the left and right above the headlamps.
To avoid injuries, be sure that the
travel path of the hood is clear
when it is closed, following the same
safety precautions used in all closing
procedures.
If you notice while driving that the hood
is not completely closed, stop immedi-
ately and close it securely.<
handbook.book Page 114 Saturday, July 27, 2002 1:12 PM

116
Engine compartment essentials
handbook.book Page 116 Saturday, July 27, 2002 1:12 PM

117
1Filler neck for headlamp and wind-
shield washer cleaning system118
2Coolant expansion tank120
3Positive terminal connection for
jump-starting – positive terminal139
4Engine oil filler neck119
5Expansion tank for SMG hydraulic
unit, checking and possible refilling
by your BMW center65
6Engine oil dipstick118
7Filler neck for brake fluid121Engine compartment essentials
OverviewControlsMaintenanceRepairsDataIndex
handbook.book Page 117 Saturday, July 27, 2002 1:12 PM

118
Washer fluidsHeadlamp* and windshield
washer systemCapacity approx.
5.6 US quarts/5.3 liters.
Fill with water and – if required – with a
washer antifreeze additive according to
manufacturer's recommendations.
We recommend that you mix the
washer fluid before adding it to
the reservoir.<
Antifreeze agents for the washer
fluid are highly flammable. For this
reason, keep them away from sources
of flame and store them only in their
original containers. Store them inacces-
sible to children. Comply with the
instructions on the containers.<
Engine oilChecking the oil level1. Park the vehicle on a level surface
2. Switch the engine off after it has
reached normal operating tempera-
ture
3. After approx. 5 minutes, pull the dip-
stick out and wipe it off with a clean
lint-free cloth, paper towel, or similar
material
4. Carefully push the dipstick all the
way into the guide tube and pull it
out again
5. The oil level should be between the
two marks on the dipstick.
As with fuel economy, oil consumption
is directly influenced by your driving
style and vehicle operating conditions.
The oil volume between the two marks
on the dipstick corresponds to approx.
1.4 US quarts/1.3 liter.
handbook.book Page 118 Saturday, July 27, 2002 1:12 PM

119
Adding engine oilWhile you should wait until the level has
dropped to just above the lower mark
before adding oil, you should never
allow the oil level to fall below this
mark.
Do not fill beyond the upper mark on
the dipstick. Excess oil will damage the
engine.
Before checking the engine oil level
after topping up, restart the engine and
allow it to run to obtain a correct dis-
play. Then proceed as described under
Checking the oil level.
BMW engines are designed to
operate without oil additives; the
use of additives could lead to damage
in some cases. This also applies to the
manual transmission, the differential,
and the power steering system.<
Recommendation: have the oil changed
by your BMW center only.
Continuous exposure to used oil
has caused cancer in laboratory
testing. For this reason, thoroughly
wash any areas of skin that come into
contact with oil using soap and water.
Always store oils, grease and similar
materials so that they are inaccessible
to children. Comply with warning labels
and information on containers.<
Comply with the applicable envi-
ronmental laws regulating the dis-
posal of used oil.<
Specified engine oilsThe quality of the engine oil is
extremely important for the function
and life of an engine. Based on exten-
sive testing, BMW has approved only
certain grades of engine oil.
Use only oils approved for your vehicle
model.
Ask your BMW center for details
concerning oils that have been
approved. You can also call BMW of
North America toll-free at 1-800-831-
1117 or visit this website:
www.bmwusa.com to obtain this infor-
mation.<
Alternative oil typesIf a High Performance Synthetic Oil
approved by BMW should be unavail-
able, you may use small volumes of
other oils for topping up between oil
changes. The following data must
appear on the packaging:
>Viscosity
preferred: SAE 10W-60
alternative: SAE 5W-40 or
SAE 10W40
>Specifications
preferred: API SJ/CF
alternative: API SJ – also SK, SL, S
etc.Low ambient temperaturesThe oils used by BMW at the factory for
your vehicle model can be used at virtu-
ally any ambient temperature.
Engine oil
OverviewControlsMaintenanceRepairsDataIndex
handbook.book Page 119 Saturday, July 27, 2002 1:12 PM

120
However, if the vehicle is exposed to
temperatures below –47/–206 for
extended periods, please have your
BMW center recommend a suitable oil.
Coolant
Do not add coolant to the cooling
system when the engine is hot. If
you attempt to do so, escaping coolant
can cause burns.
Antifreeze and anti-corrosion agents
are hazardous to health. You should
always store them in their original con-
tainers and in a location inaccessible to
children. Antifreeze and anti-corrosion
agents are inflammable. For this rea-
son, do not spill them on hot engine
parts. They could ignite and cause
burns. Comply with the instructions on
the containers.<
Check the coolant level and add
coolantCheck the coolant level when the
engine is cold, approx. 687/+206.
1. Open the cap for the expansion tank
by turning it slightly counterclock-
wise to allow accumulated pressure
to escape. Then open
2. The coolant level is correct when the
upper end of the red float is at least
even with the upper edge of the filler
neck – refer to the arrow in the illus-
tration. The end of the float may stick
out by a maximum of 3/4 in / 2 cm –
that is, up to the second mark on the
float. Refer also to the schematic dia-
gram next to the filler neck
Engine oil
handbook.book Page 120 Saturday, July 27, 2002 1:12 PM

121
3. If necessary, add coolant. If the cool-
ant is low, slowly add coolant until
the correct level is reached — do not
overfill.
Comply with the applicable envi-
ronmental laws regulating the dis-
posal of antifreeze agents with corro-
sion inhibitor.<
Brake fluid
The brake warning lamp comes
on when the parking brake is
not engaged: brake fluid level
too low, refer to page18.
Brake warning lamp for Cana-
dian models.
Adding brake fluidFor adding brake fluid or for determin-
ing and correcting the cause of brake
fluid loss, consult your BMW center.
Your BMW center is familiar with the
specifications for factory-approved
brake fluids – DOT 4.
Due to loss in brake fluid, pedal travel
can lengthen and braking efficiency
may be reduced. Refer to the informa-
tion on page 108.
Brake fluid is hygroscopic, that is,
it absorbs moisture from the air
over time.
In order to ensure the safety and reli-
ability of the brake system, have the
brake fluid changed every two years by
a BMW center. Refer also to the Service
and Warranty Information Booklet for
US models or in Warranty and Service
Guide Booklet for Canadian models.
Brake fluid is toxic and damages the
vehicle's paint. You should always store
it in its original container and in a loca-
tion inaccessible to children.
Do not spill the brake fluid and do not
fill the brake fluid reservoir beyond the
MAX mark. The brake fluid could ignite
upon contact with hot engine parts and
cause serious burns.<
Comply with the applicable envi-
ronmental laws regulating
the disposal of brake fluid.<
Coolant
OverviewControlsMaintenanceRepairsDataIndex
handbook.book Page 121 Saturday, July 27, 2002 1:12 PM

122Maintenance
The BMW Maintenance SystemThe BMW Maintenance System has
been designed as a reliable means of
providing maximum driving and operat-
ing safety – and as cost-effectively for
you as possible.
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 the resale
value of the vehicle.Service interval displayWhile conventional systems rely on dis-
tance traveled alone to determine when
service is due, the BMW Maintenance
System has for years taken the actual
conditions under which the vehicle
operates into consideration, because
miles can be traveled in many different
ways:
For example, 62,000 miles/100,000 km
short-distance driving are not equal to
the same 62,000 miles/100,000 km of
long-distance travel.
The BMW Maintenance System
includes the Engine Oil Service and
Inspections I and II.
Have a break-in inspection per-
formed at approx. 1,250 miles/
2,000 km regardless of the service
interval indicated on the display.<
Determining the maintenance intervals
according to the actual loads on the
vehicle covers every kind of operating
situation. Minimal-use drivers – who
drive significantly fewer than
6,200 miles/10,000 km annually –
should have the engine oil changed at
least every 2 years regardless of what
the service interval display indicates,
since oil deteriorates over time, irre-
spective of use.
Service and Warranty Information
Booklet for US models/Warranty
and Service Guide Booklet for
Canadian modelsFor additional information on required
maintenance intervals and procedures,
please refer to the Service and War-
ranty Information Booklet for US mod-
els, or the Warranty and Service Guide
Booklet for Canadian models.
As a precaution against corrosion, it is
advisable to have the body checked for
damage from rocks or gravel at the
same time, depending upon operating
conditions.
Have your BMW center perform
maintenance and repair.
Be sure that all maintenance work is
recorded in the Service and Warranty
Information Booklet for US models, or
in the Warranty and Service Guide
Booklet for Canadian models. These
entries are your verification for the reg-
ular maintenance of your vehicle and
are required for the performance of
warranty repairs.<
handbook.book Page 122 Saturday, July 27, 2002 1:12 PM

124Laws and regulations
California Proposition 65 warningCalifornia laws require us to state the
following warning:
Engine exhaust, some of its con-
stituents, and certain vehicle com-
ponents contain or emit chemicals
known to the State of California to
cause cancer and birth defects and
reproductive harm. In addition, certain
fluids contained in vehicles and certain
products of component wear contain or
emit chemicals known to the State of
California to cause cancer and birth
defects and reproductive harm.
Battery posts, terminals and related
accessories contain lead and lead com-
pounds. Wash your hands after
handling.
Used engine oil contains chemicals that
have caused cancer in laboratory ani-
mals. Always protect your skin by
washing thoroughly with soap and
water.<
OBD interface socketThe Onboard Diagnostic (OBD) inter-
face socket is located on the left of the
driver's side at the bottom of the instru-
ment panel and under a cover. The
cover has the letters OBD on it.
The purpose of the OBD system is to
assure proper emission-control system
operation for the vehicle's lifetime by
monitoring emission-related compo-
nents and systems for deterioration and
malfunction.
An illuminated indicator informs
you of the need for service, not
that you need to stop the vehi-
cle. However, the systems should be
checked by your BMW center at the
earliest possible opportunity.
handbook.book Page 124 Saturday, July 27, 2002 1:12 PM

125
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 misfiring for even a short period
of time can seriously damage emission-
control system components, especially
the catalytic converter.
SERVICE ENGINE SOON warn-
ing lamp for Canadian models.
If the fuel filler cap is not on tight
enough, the OBD system can
detect leaking vapor and the indicator
will light up. If the fuel filler cap is then
tightened, the indicator will usually go
out after a short period of time. OverviewControlsMaintenanceRepairsDataIndex
handbook.book Page 125 Saturday, July 27, 2002 1:12 PM