2008 Alfa Romeo 166 engine

222
– Before doing any work on the electric
system, disconnect the battery negative
terminal.
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 anti-theft function, etc.) contact
Authorised Alfa Romeo Services whose
qualified personnel, in addition to sug-
gesting the most suitable devices from
Lineaccessori 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 higher capacity is necessary.
In fact, these devices continue to absorb
current with the ignition key off (car
parked, engine off) and may gradually
drain the battery. IMPORTANT A battery kept at below
50% of its capacity is damaged by sul-
phation, the capacity is reduced and start-
ing is difficult, there is also more possibili-
ty of freezing (this can occur at –10°C).
In the event of a prolonged stop, refer to
“Vehicle inactivity”.
USEFUL HINTS TO EXTEND
THE LIFE OF YOUR BATTERY
To avoid quickly draining the battery
and to preserve its operating conditions
over the course of time, carefully follow
the instructions below.
– The terminals must always be tight-
ened.
– As far as possible avoid keeping ser-
vices on for a long time with the engine
stopped (radio, hazard warning lights,
parking lights, etc.).
– When leaving the vehicle parked in a
garage, make sure that the doors, bon-
net, boot and interior lids are properly
shut to prevent lights from staying on.
The fluid contained in the
battery is poisonous and
corrosive. Avoid contact with the
skin or eyes. The battery should be
charged in a ventilated place away
from naked flames or possible
sources of sparks: danger of ex-
plosion and fire.
WARNING
Never attempt to charge
a frozen battery before
thawing it, the danger of explosion
exists. If it has frozen, always
check that the inside elements are
not broken (risk of short circuit)
and that the body is not cracked,
with the risk of acid coming out
which is poisonous and corrosive.
WARNING

223
– If electrical welding is to be carried
out on the body of the vehicle the elec-
tronic control units must be disconnected
or removed if the work involves the pro-
duction of high temperatures.The total absorption of these accessories
(standard and installed later) must be
0.6 mA x Ah (of the battery), as shown
in the table below:
BatteryMaximum permissible loadless absorption
100 Ah 60 mA
You are also reminded that services with
high current absorption activated by the
user, such as bottle warmers, vacuum
cleaners, cellular telephone, mini refriger-
ator, etc. accelerate the battery drainage
process if they are powered with the en-
gine not running.
IMPORTANT It should also be noted
that improper branches on connectors of
the electric wiring for installing additional
equipment is dangerous, particularly if
safety devices are involved.
ELECTRONIC
CONTROL UNITS
With normal use of the vehicle no par-
ticular precautions need to be taken.
If interventions are to be carried out on
the electrical system or emergency start-
ing the following must be heeded:
– Always switch off the engine before
disconnecting the battery from the electri-
cal system.
– If battery charging is necessary dis-
connect it from the electric system.
– When starting in an emergency only
an auxiliary battery must be used and not
a battery charger.
– Check that the polarity is correct and
that the connections between the battery
and the electrical system are sound.
– Before connecting or disconnecting
the terminals of the electronic units en-
sure that the ignition key is not in the
MARposition.
– Do not check for current in the cables
by short-circuiting the ends.
If additional systems are
to be installed on the ve-
hicle the danger of incorrectly tak-
ing branches from the electrical
wires cannot be emphasized too
strongly especially if devices es-
sential to the safety of the vehi-
cle and its occupants are involved
(ignition, injection, ABS ...). The in-
correct installation of radio sys-
tems, electronic theft alarms, ra-
diotelephones etc. can interfere
with the electronic control units and
compromises the warranty cover.
For these interventions we re-com-
mend that you contact Alfa Romeo
Authorized Services.The loadless
absorption of all the accessories in-
stalled in the after market must
not exceed 20 mA (reading with
the vehicle stationary).
WARNING

224
– Insert a new blade passing it through
the curved top of the arm (A) through
the slot.
– Lift the blade to clamp tab (B) of the
coupling spring with the curved top of the
arm.
IMPORTANT The blades may differ
according to the versions. In any case,
follow the instructions provided in the
packs available as spares from Alfa
Romeo Authorized Services.WINDSCREEN WIPER
BLADES
(fig. 17)
Periodically clean the wiper blades and
ensure that they are not damaged. If the
rubber blades are bent of worn in parts
they should be replaced, as follows:
– Press the tab (B) of the blade catch
spring and push the blade towards the
base of the arm (A).
– When the catch spring has been freed
from the curved top of the arm, withdraw
the blade from the arm through the slot. The spark plugs must be
changed at intervals
given in the Pro-
grammed Maintenance Schedule.
Only use spark plugs of the spec-
ified type (see table of “Fuel
Supply and Ignition” in the
“Technical specifications” chap-
ter): if the thermal grade is inad-
equate, or the foreseen life is
not guaranteed inconveniences
may result.
SPARK PLUGS
If the engine is running unevenly have
the spark plugs checked by Alfa Romeo
Authorized Services.
624PGSm
fig. 17

225
– Application of enamels with greater
resistance to atmospheric pollutants.
– Adoption of “open” boxed parts to
prevent condensation from triggering cor-
rosion from the inside.
The underbody is treated with the appli-
cation of a special protective material.
If this protective layer requires restora-
tion the exhaust system, lambda probe
and catalytic converter must be left free
of any wax, oil, plastic and/or inflamma-
ble product.
This should therefore be carried out by
Alfa Romeo Authorized Services.SPRAY JETS
Make sure that the windscreen and
headlight washer jets deliver a jet of fluid
which is adequate and correctly directed.
If the spray devices are not working
check that the supply circuit is not
blocked. If necessary unclog the nozzles
using a needle.
BODYWORK
PROTECTION FROM
ATMOSPHERIC AGENTS
Alfa Romeo employs manufacturing
technologies which are designed to pro-
tect the bodywork against chemical corro-
sion caused by various factors, for exam-
ple:
– atmospheric pollution.
– Salty air and humidity (coastal areas,
hot-humid climates).
– Road surfaces covered with salt and
de-icing products during the winter.
To further increase resistance against
corrosion the following procedures have
been adopted:
– painting system and paint products
which render the vehicle particularly resis-
tant to corrosion and abrasion.
– Wide use of sheet metal which is ex-
tremely resistant to corrosion.
– Spraying of the underbody, engine
bay, wheel arches and boxed parts with
suitable products which adhere strongly
to the metal parts and have a high pro-
tection capability.

227
IMPORTANT The vehicle should be
washed with the engine cold and the igni-
tion key turned to STOP. After washing
make sure that the various protections
(e.g. rubber caps and recess covers) have
not been damaged or removed. When drying off take particular care to
cover the less visible parts like the bonnet
and boot lids and around the headlights
where water may stagnate. The vehicle
should not be taken to an enclosed area
immediately but left in the open so that
the residual water can evaporate. Do not
wash the vehicle after it has been left in
the sun or when the bonnet is hot as this
may alter the shine of the paintwork.
Plastic parts must be cleaned in the same
way as the rest of the vehicle. Specific
products need only be used when dirt is
particularly resistant.
IMPORTANT Bird droppings must be
washed off immediately as the acid con-
tained in them is particularly aggressive.
To better protect the paint, occasionally
polish with special products (silicone
wax) which leave a protective layer on
the body.WINDOWS
Use specific products to clean the win-
dows. Clean cloths should be used to
avoid scratching or altering the trans-
parency of the glass.
ENGINE COMPARTMENT
At the end of the winter the engine
compartment should be carefully washed.
Contact a specialised workshop to have
this done.The inside of the rear
windscreen should be
wiped gently with a
cloth in the direction of the fila-
ments to avoid damaging the
heating device.
Detergents cause water
pollution. The car should
therefore be washed in
areas equipped for the collection
and purification of the liquid used
in the washing processes.
For washing the engine
compartment, you are
recommended to use
“FULCRON” available in Alfa
Romeo Lineaccessori. In any
case, only use soda-free deter-
gent solutions preferably alka-
lined with metasilicates.After
washing the engine compartment
it must be accurately rinsed with
a specific operation and dried. In
fact the normal passage of the
body washing tunnel is unable to
rinse the engine compartment
adequately.

231
The following pages give the various specifications of the vehicle.
These pages will probably represent the main reference point in
this booklet for the “experts and enthusiasts”.
This section should be consulted in order to identify the main cha-
racteristics of your vehicle referred to in the previous chapters.IDENTIFICATION DATA...............................................................................page 232
ENGINE CODES-BODY VERSIONS
.....................................................................233
DIMENSIONS
...........................................................................................................234
ENGINE
......................................................................................................................235
SERVICING
................................................................................................................236
ENGINE OIL CONSUMPTION
..............................................................................236
LUGGAGE COMPARTMENT
..................................................................................237
WEIGHTS
...................................................................................................................237
FUEL SUPPLY - IGNITION
....................................................................................238
PERFORMANCE
.......................................................................................................239
FUEL CONSUMPTION
............................................................................................240
CO
2EMISSIONS......................................................................................................241
BRAKES
.....................................................................................................................241
STEERING
..................................................................................................................242
TRANSMISSION
.......................................................................................................242
FLUIDS AND LUBRICANTS
..................................................................................243
RIM AND TYRES
....................................................................................................245
TYRE INFLATION PRESSURE
...............................................................................247
RADIO FREQUENCY REMOTE CONTROL:
MINISTERIAL HOMOLOGATIONS
.....................................................................251
TECHNICAL SPECIFICATIONS

232 IDENTIFICATION DATA
The identification data should be record-
ed. The identification data is carried on la-
bels in the following positions (fig. 1):
1- Identification label
2- Body label
3- Bodywork paint identification label
4- Engine label.
BODY LABEL
The body label carrying the following in-
formation is located in front of the right
front seat concealed by the lid (A-
fig. 2), it is printed with the body identi-
fication (fig. 3) including:
– Type of vehicle
– Manufacturer’s serial number (chassis
number).
ENGINE LABELS
On the rear left-hand side, gearbox side.
BODYWORK PAINT
IDENTIFICATION LABEL
(fig. 4)
This is applied to the inner part of the
luggage compartment and carries the fol-
lowing data:
A- Paint manufacturer
B- Name of colour
C- Colour code
D- Colour code for touching up and re-
spraying.
A0D0105m
fig. 1
3224CAm
fig. 4
353PGSm
fig. 3
352PGSm
fig. 2

233
IDENTIFICATION LABEL
This is located in the left-hand side of
the boot (next to the battery) (fig. 5).
It carries the following identification da-
ta:
A- Space for details of national ho-
mologation
B- Space for punching the consecutive
chassis numberC- Space available for maximum
weights authorised by various national
laws
D- Space for version and any supple-
mentary indications to those specified
E- Space for smoke index (JTD 20V
Multijet versions only)
F- Space for punching manufacturer’s
name.
ENGINE AND BODY VERSION CODES
3.2 V6 24V JTD 20VMultijet
Engine Code 936A000 936B000
Body Code 936AXB00 17936AXG00 22
3225CAm
fig. 5