engine overheat BMW M ROADSTER COUPE 2001 Owners Manual

20n

Indicator and warning lamps

Technology that monitors itself

Many of the systems of your BMW
monitor themselves automatically, both
during engine starts and while you are
driving. Indicator and warning lamps
that are identified by "

l

" are tested for
proper functioning whenever the igni-
tion key is turned. They each light up
once for different periods of time.
If a fault should occur in one of these
systems, the corresponding lamp does
not go out after the engine is started or
it lights up while the vehicle is moving.
You will see how to react to this below.

Red: stop immediately

Battery charge current

l

The battery is no longer being
charged. The alternator drive
belt is defective or there is a malfunc-
tion in the charging circuit of the alter-
nator. Please contact the nearest BMW
center.
If the drive belt is defective, do not
continue driving. The engine could
be damaged due to overheating.
Increased force is required to steer the
vehicle if the drive belt is defective.

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Engine oil pressure

l

Stop the vehicle immediately
and switch off the engine.
Check the engine oil level. Top up as
required. If oil level is correct: please
contact the nearest BMW center.
Do not continue driving, other-
wise, the engine could be
damaged because of inadequate lubri-
cation.

<



Brake hydraulic system

l

The brake fluid level is too low.
Before driving further, be sure to
read the notes on pages 92 and 112.
Brake hydraulic system warning
lamp for Canadian models.
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63n
IndexDataTechnologyRepairsCar careControlsOverview
Coolant temperature gauge Engine oil temperatureBlueThe engine is still cold. Drive at
moderate engine and vehicle speeds.RedWhen you switch on the ignition, the
warning lamp comes on briefly to
confirm that the system is operational.
Comes on while driving: the engine is
overheated. Switch off the engine
immediately and allow it to cool down.36mde752
Between the blue and red zonesNormal operating range. It is not
unusual for the needle to rise as far as
the edge of the red zone in response to
high outside temperatures or severe
operating conditions.
Checking coolant level: page 112.
During normal operation the engine oil
temperature is between 175 7 (80 6)
and 250 7 (120 6). During perfor-
mance-oriented driving, do not exceed
the maximum temperature of 265 7
(130 6).
Up to an oil temperature of 140 7
(60 6) an engine speed of 4,000 rpm
may not be exceeded.
36mus730
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91n
IndexDataTechnologyRepairsCar careControlsOverview
Disc brakesDisc brakes furnish optimum decelera-
tion and braking control and greater
fade resistance under heavy use.
When the vehicle is driven only occa-
sionally, during extended periods when
the vehicle is not used at all, or in oper-
ating conditions where brake applica-
tions are less frequent, there is an
increased tendency for corrosion of the
discs and accumulation of contamina-
tion on the brake pads. This occurs
because the minimal pressure which
must be exerted by the pads to clean
the discs by brake applications is not
reached.
If the brake discs are corroded, they will
tend to respond to braking with a
pulsating effect which even extended
application will fail to cure.
For your own safety: use only
brake pads that BMW has
approved for your specific vehicle
model. BMW cannot evaluate non-
approved brake pads to determine if
they are suited for use, and therefore
cannot ensure the operating safety of
the vehicle in the event of their use.<
Driving notesWhile driving in wet conditions and in
heavy rain, it is advisable to apply light
pressure to the brake pedal every few
miles – watch traffic conditions to
ensure that this maneuver does not
endanger other road users. The heat
generated in this braking process helps
dry the brake pads and discs.
Maximum braking force is obtained
while the wheels continue to rotate,
peaking when the wheels remain on the
verge of locking without actually doing
so. ABS maintains this state automati-
cally. If the ABS fails, you should revert
to the staggered braking technique
described on page 94.
Extended or steep mountain descents
should be driven in the gear in which
only minimal periodic brake application
is required. This avoids excessive strain
on the brakes and possible impairment
of the braking effect.
You can increase the engine's braking
effect by selecting progressively lower
gears, downshifting into first gear, if
necessary. Should engine braking prove inade-
quate, you should still avoid extended,
continuous braking. Instead, decelerate
the vehicle with increased pressure on
the brake pedal (watch for following
traffic!), release the pedal and then
repeat the brake application (staggered
braking). This staggered braking tech-
nique allows the brakes to cool in the
intervals between active braking
phases, preventing overheating and
ensuring that full braking capacity
remains available at all times.
Do not drive the vehicle with the
clutch depressed, with the shift
lever in neutral or with the engine shut
off. The engine provides no braking
control when the transmission is in
neutral and there is no power assist for
braking and steering when the engine is
shut off.
Never allow floor mats, carpets or any
other objects to protrude into the area
around the accelerator, clutch and
brake pedals and obstruct their move-
ment.<
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