2007 Alfa Romeo 156 engine

CAR MAINTENANCE
261
ENGINE COOLANT LEVEL
Top up only with the same
fluid contained in the cool-
ing circuit. PARAFLU UP
(red) cannot be mixed with
PARAFLU 11 (blue) or with other
fluids. Should this take place, do
not start the engine and contact Al-
fa Romeo Authorized Service.
The level of the coolant in the header tank
(reservoir) should be checked with the en-
gine cold and the car on a level surface and
it should be between the MINand MAX
marks on the tank. If the level is low, loosen
the header tank cap (A) and slowly pour
a mixture of the fluid specified in the ”Flu-
ids and lubricants ” table in section “Tech-
nical Specifications”, through the filler neck
until nearing the MAXmark; have this op-
eration carried out at Alfa Romeo Authorised
Services.
The antifreeze mixture contained in the
cooling circuit guarantees protection down
to –35°C.fig. 16 - 2.5 V6 24V version
A0B0160m
fig. 15 - T.SPARK, 2.0 JTS and JTD versions
A0B0161m
Fig. 15: T.SPARK, 2.0 JTS and diesel ver-
sions
Fig. 16: 2.5 V6 24V versionThe cooling system is
pressurised. If necessary,
replace the cap only with
another genuine one, otherwise
system efficiency could be compro-
mised.
Do not remove he cap
when the engine is hot:
danger of burns.
WARNING

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262
WARNINGContact Alfa Romeo Autho-
rized Services for maintenance and repair
operations. If the level of the oil in the reservoir falls
below the specified level, top up only with
one of the products listed in the table
“Fluids and lubricants” in the “Technical
specifications” chapter as follows:
– Start the engine and allow the oil in the
reservoir to settle.
– When the engine is running turn the
steering wheel lock to lock a few minutes.
– Top up to the MAXlevel notch and
then replace the cover.Oil consumption is very
low, if topping up again is
needed shortly afterwards,
have the system checked for pos-
sible leaks by Alfa Romeo Autho-
rized Services.fig. 19 fig. 18
A0B0158m
A0B0158m
POWER STEERING OIL LEVEL Fig. 17: T.SPARK versions
Fig. 18: 2.0 JTS versions
Fig. 19: 2.5 V6 24V and JTD versions
Check that the oil level in the reservoir is
at the MAX level.
This operation must be carried out with the
car on level ground and when the engine
is stationary and cold.
Check that the level reaches the MAXref-
erence notch on the reservoir or coincides
with the upper notch (maximum level) on
the dipstick integral with the reservoir cap.fig. 17
A0B0159m
Power steering fluid is
highly inflammable. Do not
let it come into contact with hot en-
gine parts.
WARNING

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264
WINDSCREEN/HEADLIGHT
WASHER FLUID Fig. 21: T.SPARK, 2.0 JTS and diesel ver-
sions
Fig. 22: 2.5 V6 24V version.
Check the level in the reservoir removing
the cap (A).fig. 21
A0A0156m
fig. 22
A0A0155m
To avoid damaging the
pump motors, do not use
the windscreen washers
when the reservoir is empty.
If necessary top up using a mixture of wa-
ter and TUTELA PROFESSIONAL SC 35
as follows:
– 30% of TUTELA PROFESSIONAL
SC 35and 70% water in summer;
– 50% of TUTELA PROFESSIONAL
SC 35and 50% water in winter;
– in the case of temperatures below
–20°C use TUTELA PROFESSIONAL
SC 35fluid neat.
Do not travel with the
windscreen washer reser-
voir empty: the action of the wind-
screen washer is fundamental for
improving vision.
WARNING
Some commercial additives
for windscreen washers
are inflammable. The engine com-
partment contains hot components
which could set it on fire.
WARNING

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265
DIESEL FILTERDRAINING CONDENSATION
WATER
Water in the supply circuit
can seriously damage the
whole injection system and
cause malfunctions to engine oper-
ation. Should the warning lamp
c
turn on, available for the provid-
ed versions/markets, contact as
soon as possible the Alfa Romeo
Authorised Service for drainage op-
erations.
When the car is habitual-
ly driven in dusty areas,
the cleaner should be
changed at shorter intervals than
those given in the Programmed
Maintenance Schedule.Any attempt to clean the
air cleaner may cause se-
rious engine damage.
AIR FILTERThe air cleaner is connected to the tem-
perature and air flow sensors which send the
electrical signals needed for correct opera-
tion of the injection and ignition system to
the control unit.
It must therefore always be in perfect con-
ditions to ensure correct operation of the en-
gine, low consumption and exhaust emis-
sion levels.
If they are not carried out
correctly and with the due
precautions, the operations
involving cleaner replacement de-
scribed herein may compromise the
safety of the car.
This operation should be carried
out by Alfa Romeo Authorized Ser-
vices.

CAR MAINTENANCE
269
USEFUL HINTS TO EXTEND
THE LIFE OF YOUR BATTERYTo avoid quickly draining the battery and
to preserve its operating conditions over the
course of time, carefully follow the instruc-
tions below:
– The terminals must always be tightened.
– As far as possible, avoid keeping ser-
vices on for a long time with the engine
stopped (radio, hazard lights, parking lights,
etc.).
– When leaving the car parked in a
garage, make sure that the doors, bonnet,
boot and interior lids are properly shut to
prevent lights from staying on.
– Before doing any work on the electric
system, disconnect the battery negative ter-
minal.– If after purchasing the car, you wish to
install electrical accessories which need a
permanent electrical supply (alarm, hands-
free phone, radio-navigator with satellite an-
ti-theft function, etc.) contact Alfa Romeo
Authorized Services whose qualified per-
sonnel, in addition to suggesting the most
suitable devices from Lineaccessori Alfa
Romeo will be able to evaluate the total
electrical absorption, checking whether the
car’s electric system is able to support the
load required or whether a battery with high-
er capacity is necessary. In fact, these de-
vices continue to absorb current with the
ignition key off (car parked, engine off) and
may gradually drain the battery.
REPLACING THE BATTERYIf required, replace the battery with a gen-
uine spare part having the same specifica-
tions. If a battery with different specifica-
tions is fitted, the service intervals given in
the Programmed Maintenance Schedule in
this section will no longer be valid. Refer
to the instructions provided by the battery
manufacturer.

CAR MAINTENANCE
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– Do not check for current in the cables by
short-circuiting the ends.
– If electrical welding is to be carried out
on the body of the car, the electronic con-
trol units must be disconnected or removed
if the work involves the production of high
temperatures.
You are also reminded that services with
high current absorption activated by the user,
such as bottle warmers, vacuum cleaners,
cellular telephone, mini refrigerator, etc. ac-
celerate the battery drainage process if they
are powered with the engine not run-
ningor running at idle speed.
WARNINGIt should also be noted that
improper branches on connectors of the elec-
tric wiring for installing additional equipment
is dangerous, particularly if safety devices
are involved.
ELECTRONIC CONTROL
UNITSWith normal use of the car, no particular
precautions need to be taken.
In the event of work on the electric system
or emergency starting, the instructions giv-
en below must absolutely be adhered to:
– Always switch off the engine before dis-
connecting the battery from the electric sys-
tem.
– If it is necessary to charge the battery,
always disconnect it from the electric sys-
tem.
– When starting in an emergency, only
use an auxiliary battery and not a battery
charger.
– Check that the bias is correct and that
the connections between the battery and
the electric system are in efficient conditions.
– Do not connect or disconnect the ter-
minals of the electronic units while the ig-
nition key is at MAR.
Battery50 Ah60 Ah70 AhMaximum permissible
loadless absorption
30 mA
36 mA
42 mAThe total absorption of these accessories
(standard and installed later) must be less
than 0.6 mA x Ah (of the battery), as
shown in the table below:
Alterations or repairs to
the electric system carried
out incorrectly and without taking
into account the specifications of
the system, may cause operating
faults with the risk of fire.
WARNING

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HEADLIGHT WASHERS(optional for versions/markets
where applicable)
Regularly check that the spray jets are in-
tact and clean fig. 28.
If it is necessary to direct the jet, contact
an Alfa Romeo Authorized Service.
BODYWORKPROTECTION FROM
ATMOSPHERIC AGENTSThe main causes of corrosion are:
– atmospheric pollution
– salty air and humidity (coastal areas, or
hot humid climates)
– seasonal environment conditions.
Not to be underestimated is also the abra-
sive action of wind-borne atmospheric dust
and sand and mud and gravel raised by oth-
er vehicles.
On your Alfa 156, Alfa Romeo has
implemented the best manufacturing tech-
nologies to effectively protect the bodywork
against corrosion.
These include:
– Painting products and systems which
give the car particular resistance to corrosion
and abrasion.
– Use of galvanised (or pretreated) steel
sheets, with high resistance to corrosion.
– Spraying the underbody, engine com-
partment, wheel arches and other parts with
highly protective wax products.
SPRAY JETS Make sure that the windscreen and head-
light (where applicable) washer jets deliv-
er a jet of fluid which is adequate and cor-
rectly directed.
If the spray devices are not working check
that the supply circuit is not blocked. If nec-
essary unblock the nozzles using a needle.
fig. 28
A0B0581m

CAR MAINTENANCE
276
Detergents cause water
pollution. Therefore the en-
gine compartment should
be washed in areas equipped for
collecting and purifying the liquid
used in the washing process.
WARNINGThe vehicle should washed
with the engine cold and the ignition key at
STOP. After washing make sure that the
various protections (e.g. rubber caps and
various covers) have not been damaged or
removed. Do not wash the car after it has been left
in the sun or with the bonnet hot: this may
alter the shine of the paintwork.
Exterior plastic parts must be cleaned in
the same way as the rest of the vehicle.
Where possible, do not park under trees;
the resinous substance many species release
give the paint a dull appearance and in-
crease the possibility of triggering rust
processes.
WARNINGBird droppings must be
washed off immediately and thoroughly as
the acid they contain is particularly ag-
gressive.Windows
Use specific products to clean the windows.
Use clean cloths to avoid scratching or al-
tering the transparency of the glass.
WARNINGThe inside of the rearscreen
should be wiped gently with a cloth in the
direction of the filaments to avoid damag-
ing the heating device. Engine compartment
At the end of the winter the engine com-
partment should be carefully washed, with-
out directing the jet against electronic con-
trol units. Contact a specialised workshop to
have this done.