2007 Alfa Romeo 166 check engine

202 PROGRAMMED
MAINTENANCE
PRECAUTIONS
Many moving parts, high voltage cables
and parts that reach high temperatures
which may cause serious injury to unquali-
fied persons are located in the engine
compartment.
The following precautions should there-
fore be taken:
– Switch off the engine and wait until
it cools.
– Be particularly cautious when work-
ing near the engine cooling fan as this
may cut in unexpectedly on the basis of
the engine coolant temperature.
– Do not smoke or use naked flame.
– Always keep a fire extinguisher to
hand.
– Do not use the jack supplied with the
car for checking underneath it.Vehicle maintenance
should be entrusted to
an Alfa Romeo Author-
ized Service. For interventions of
routine maintenance and small
repairs you wish to carry out
your-self, make sure you always
have the proper equipment, gen-
uine Alfa Romeo spare parts and
the necessary liquids; do not,
however, carry out these opera-
tions if you have no experience.
The jack with which the
vehicle is fitted must on-
ly be used when changing a wheel.
All other operations where the ve-
hicle must be lifted require the use
of specific procedures and should
be carried out by Alfa Romeo Au-
thorized Services.
WARNING
Ensure that scarves, ties
and loose clothing cannot
get caught by moving parts.
WARNING
DANGER-SERIOUS INJU-
RY. When carrying out
checks or maintenance operations
in the engine compartment, take
special care not to bump the head
on the raised bonnet.
WARNING
Never smoke when
working in the engine
compartment: inflammable gas and
vapours may be present which con-
stitute a fire hazard.
WARNING

204
PROGRAMMED MAINTENANCE SCHEDULE
thousands of kilometres
Check tyre conditions/wear and adjust pressure if required
Check light system operation (headlights, direction indicators, hazard lights, boot lights,
passenger compartment lights, glovebox lights, warning lights, etc.)
Check windscreen wiper/washer operation, adjust nozzles if required
Check windscreen/rear window blade position/wear
Check front disk brake pad conditions and wear and wear indicator operation
Check rear disk brake pad conditions and wear
Sight inspect the conditions of: body external parts, underbody protection, pipes and hoses
(exhaust - fuel - brakes), rubber parts (boots, sleeves, bushes, etc.)
Check cleanness of locks, bonnet and boot and lever cleanness and lubrication
Check condition of timing drive belt
Sight check for conditions of Poly-V accessory drive belt
Check and adjust handbrake lever stroke
Check engine exhaust emissions (petrol versions)
Check exhaust emissions/smoke (diesel versions)
Check antievaporation system (petrol versions)20 40 60 80 100 120 140 160 180
● ●●● ● ● ● ● ●
● ●●● ● ● ● ● ●
● ●●● ● ● ● ● ●
● ●●● ● ● ● ● ●
● ●●● ● ● ● ● ●
●● ● ●
● ●●● ● ● ● ● ●
● ●●● ● ● ● ● ●
●●
●●
●● ● ●
●● ● ●
●● ● ●
●●

205
thousands of kilometres 20 40 60 80 100 120 140 160 180
Change fuel filter (diesel versions)•••••••••
Change air cleaner cartridge (petrol versions)••••
Change air cleaner cartridge (diesel versions)•••••••••
Check and top up, if required, fluid levels (brakes/hydraulic clutch, power steering,
windscreen washer, battery, engine coolant, etc.)•••••••••
Replacement of timing gear drive belt (*) and Poly-V accessory drive belt•
Replacement of spark plugs (petrol versions)•
Check operation of engine control systems (through diagnostics socket)••••
Check manual gearbox and differential oil level (petrol versions)••
Change engine oil and oil filter •••••••••
Change brake fluid (or every 24 months)•••
Check dust/pollen filter•••••••••
(*)Or every 4 years in harsh conditions (cold climates, stop and go city traffic).
Or every 5 years, regardless of the mileage.

206 ANNUAL INSPECTION
PLAN
An annual inspection plan has
been established for cars that cov-
er less than 20,000 km a year
(e.g. 10,000 km). It consists of
the following:
– Checking the condition/wear of tyres,
and adjusting pressure (including the com-
pact spare wheel, where applicable).
– Checking the lighting system (head-
lights, turn indicators, hazard warning
lights, boot light, passenger compart-
ment, warning lights of instrument panel,
etc.).
– Checking the working order of the
windscreen wiper-washer and adjusting
the nozzles.
– Checking the positioning/wear of the
windscreen wipers.
– Checking the condition and wear of
the front brake pad.– Sight inspect the conditions of: en-
gine, gearbox, transmission, pipes and
hoses (exhaust - fuel - brakes), rubber
parts (boots, sleeves, bushes, etc.).
– Check for bonnet and boot lock clean-
ness, lever cleanness and lubrication.
– Check battery charge and fluid level
(electrolyte).
– Visually checking the condition of the
belts and various controls.
– Checking and topping up, if neces-
sary, the level of liquids (coolant, brake
fluid, windscreen washer fluid, battery
etc.).
– Change engine oil and oil filter, if re-
quired.
– Check and replace pollen filter, if re-
quired.
– Check and replace air cleaner, if re-
quired.
ADDITIONAL OPERATIONS
Every 1000 kmor before long jour-
neys check and if necessary top up:
– the engine coolant fluid level
– brake fluid/hydraulic clutch control
fluid level
– power steering fluid level
– windscreen washer and headlamp
washer fluid level
– tyre pressure and conditions.
– check light system operation (head-
lights, direction indicators, hazard lights,
etc.).
– check windscreen wiper/washer op-
eration and windscreen/rear window
blade position/wear.
Every 3000 kmcheck the level of
the engine oil and top up if necessary.
Every 5000 km(only for fuel oil en-
gines): drain the condensation water
from the filter. You are recommended to
use products of the FL Selenia, de-
signed and developed expressly for Alfa
Romeo cars (see the table “Fluids and lu-
bricants” in the Technical specifications”
chapter).

207
IMPORTANT - Engine oil
Change the engine oil more frequently
than stated in the Scheduled Mainte-
nance Programme if the car is used pre-
vailingly in one of the following particular-
ly harsh conditions:
– trailer or caravan towing
– dusty roads
– short, repeated journeys (less than 7-
8 km) with an outside temperature of be-
low freezing point.
– engine idling frequently or driving
long distances at low speed (e.g. taxi or
door-to-door deliveries) or in the case of
prolonged inactivity.
IMPORTANT - Air cleaner
Using the car on dusty roads, change
the air cleaner more frequently than stat-
ed in the Scheduled Maintenance Pro-
gramme.
For any doubts about the intervals be-
tween engine oil and air cleaner changes
in relation to how the car is used, contact
Authorised Alfa Romeo Services.IMPORTANT - Fuel oil filter
The variety of the degree of purity of
the fuel oil in commerce may make it
necessary to change the fuel oil filter
more frequently than stated in the Sched-
uled Maintenance Programme. If the en-
gine is “sobbing” it is a sign that the fil-
ter needs changing.
IMPORTANT - Pollen filter
If the car is used frequently in dusty or
heavily polluted environments, you are
recommended to change the activated
carbon filtering element more frequently;
in particular, it should be changed if a
lower flow of air admitted to the passen-
ger compartment is noted.IMPORTANT - Batteries
You are recommended to have the bat-
tery charge conditions checked, prefer-
ably at the onset of winter, to avoid the
possibility of freezing the electrolyte.
This check should be carried out more
frequently if the car is used prevailingly
for short journeys, or if it is fitted with
services that absorb high amounts of cur-
rent permanently with the ignition key
off, especially if installed in the after mar-
ket.
In the case of use of the car in hot cli-
mates or particularly harsh conditions, it
is wise to check the level of the battery
fluid (electrolyte) at more frequent inter-
vals than stated in the Scheduled Mainte-
nance Programme.
IMPORTANT - Remote control
If when pressing the remote control but-
ton of the key, the operating led on the
key flashes briefly only once, the battery
need replacing with other of the same
type.

209
3.2 V6 24V version
fig. 1
k
1)engine oil
π
2)brake and
clutch fluid
+
3)windscreen
washer fluid
n
4)engine coolant
fluid
∂
5)power steering
fluid
A0D0099m
CHECKING LEVELS

211
PROTECTIVE SHIELD UNDER
ENGINE
The car is fitted with a protective shield
under the engine.
IMPORTANTWhen changing the en-
gine oil and filter, checking and changing
the gearbox and differential oil, this pro-
tection should be removed. This operation
should be carried out by Alfa Romeo Au-
thorized Services.
CHECKING ENGINE OIL LEVEL
Fig. 3:3.2 V6 24V version
Fig. 4:JTD 20V Multijet version
The engine oil level should be checked
when the vehicle is standing on a level
surface a few minutes (about 5) after the
engine has been switched off.
Remove the dipstick (A), clean it, then
re-insert it completely, remove it once again
and check that the level is between the
MIN and MAX marks on the dipstick.The interval between the MIN and MAX
marks corresponds to approximately 1
litre of oil.
Max. engine oil consumption is usually
400 grams every 1000 km.
When the car is new, the engine needs
to run in, therefore the engine oil con-
sumption can only be considered sta-
bilised after the first 5000-6000 km.
fig. 3 - 3.2 V6 24V version
424PGSm
fig. 4 - JTD 20V Multijet version
A0D0113m

212
fig. 6 - JTD 20V Multijet version
A0D0114m
The oil consumption depends on driving
style and the conditions under which the
car is used.
fig. 5 - 3.2 V6 24V versionTOPPING UP ENGINE OIL
Fig. 5:3.2 V6 24V version
Fig. 6:JTD 20V Multijet version
When the level falls to the MIN mark,
cap (B) should be removed and the sys-
tem topped up to the MAX mark through
the filler neck.
Do not exceed the MAX mark when top-
ping up with engine oil.IMPORTANT After topping up the en-
gine oil, before checking the level, run the
engine a few seconds and wait for a few
minutes (approx. 5) after stopping it.
To avoid burns particular
care should be taken
when working inside the engine
compartment when the engine is
warm.
WARNING
556PGSm