spark plugs Alfa Romeo 166 2006 Owner handbook (in English)

148ECONOMY AND
ENVIRONMENT-
FRIENDLY DRIVING
How you use and how you drive your
vehicle directly influence fuel consump-
tion and environmental impact.
By following a few simple guidelines
and without incising on the “liveliness”
of the vehicle, it is possible to avoid dam-
aging the environment and often, at the
same time, to limit fuel consumption.
The following helpful suggestions will al-
low you to save in running costs and re-
duce harmful emissions.
GENERAL CONSIDERATIONS
Vehicle maintenance
The conditions of the vehicle are an im-
portant factor which affects fuel consump-
tion as well as driving tranquillity and the
life of the car itself. For this reason, care
should be given to maintenance, having
the checks and adjustments given in the
scheduled maintenance programme car-
ried out (see ... spark plugs, idle speed,
air/fuel oil filter, timing).
Tyres
Check the tyre pressure at least every 4
weeks: if the pressure is too low, consump-
tion increases as resistance to rolling is
higher. It should also be underlined that in
these conditions, tyre wear increases re-
sulting in poor handling and lower safety. Drive at a moderate
speed when snow chains
have been fitted to the
wheels. Avoid potholes, steps and
pavements, and do not drive for
long stretches on snow-free roads,
otherwise you risk damaging the
tyres, suspension and steering.
Snow chains can be fit-
ted only on wheels with
6.5J x 16” rims and
215/55 R16 tyres or 7.5J x 17”
rims and 225/45 R17 tyres.
(*) Pour versions/marchè lorsqu’il
est prèvu pneus 205/55 R16.

151
Use an auxiliary battery to start the ve-
hicle in an emergency.
If the engine is not “running smoothly”
when the vehicle is travelling, reduce the
request for performance to a minimum
and contact Alfa Romeo Authorized Ser-
vices as soon as possible.
When the fuel reserve warning light
comes on fill up as soon as possible. A
low fuel level may cause an irregular sup-
ply to the engine with inevitable increase
of the exhaust gas temperature.
When travelling downhill for long
stretches slightly rev the engine every
now and again. This action will extend
the life of the catalyzer.
Never run the engine, even as a test,
with one or more spark plugs disconnect-
ed.
During normal operation
the catalytic converter
reaches high temperatures. Do not
therefore park the vehicle over in-
flammable materials (grass, dry
leaves, pine needles etc.): fire haz-
ard. Do not install other heat
shields and do not remove the ex-
isting ones on the catalyst and on
the exhaust pipe.
Do not spray anything on the cat-
alyst, lambda sensor and exhaust
pipe.
WARNING
The failure to follow
these rules may cause a
fire hazard.
WARNING

201
The best way to preserve the performance and safety characteris-
tics of your vehicle is to have it periodically inspected and main-
tained.
It may often be necessary to perform the maintenance op-
erations marked with the symbol illustrated previously in order to
avoid invalidation of the warranty cover.
The following pages contain the Programmed Maintenance Sched-
ule and describe the most common checks and inspections which
are fundamental to a correct maintenance schedule.
These operations should be carried out at the intervals indicated in
the Programmed Maintenance Schedule.PROGRAMMED MAINTENANCE..............................................................page 202
PROGRAMMED MAINTENANCE SCHEDULE
....................................................204
ANNUAL INSPECTION PLAN
..............................................................................206
CHECKING LEVELS
................................................................................................209
AIR CLEANER
...........................................................................................................218
DIESEL FILTER
.........................................................................................................219
DUST/POLLEN FILTER
...........................................................................................219
BATTERY
....................................................................................................................219
ELECTRONIC CONTROL UNITS
............................................................................223
SPARK PLUGS
..........................................................................................................224
WINDSCREEN WIPER BLADES
............................................................................224
SPRAY JETS
..............................................................................................................225
BODYWORK
.............................................................................................................225
INTERIOR FITTINGS
...............................................................................................228
CAR MAINTENANCE

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.

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

238
FUEL SUPPLY AND IGNITION
3.2 V6 24V JTD 20VMultijet
Supply MPI Bosch Direct injection
Motronic ME7 with variable
electronic geometry
injection turbosupercharger
and ignition and intercooler
with knock electronic
selective control diesel control
Common Rail type
second generation
Spark plugs NGK RPFR6B –
Replace every 100,000 km –
Firing order 1-4-2-5-3-6 –
Injection order – 1-2-4-5-3
(*) There are two different spark plugs, one of each type, per cylinder.
Alterations or repairs to the supply system not carried out correctly or without taking account of the
technical specifications of the system, may cause abnormal functioning with the risk of fire.
WARNING

265
Radio ........................................122
Radio-frequency remote control ........251
Radio transmitters and cellular
telephones ..............................156
Rain sensor ....................................61
Rear fog guards ..............................94
Rear roof lamps ............................101
Rear seat ........................................35
Rearscreen heating ..........................86
Refuelling......................................236
Relay (replacement) ......................186
Reversing lights..............................178
RPM counter....................................71
Safeguarding the emission
control devices ..........................150
Safeguarding the environment ........129
Safety belts ....................................40
Ski compartment ............................35
Snow chains..................................147Spark plugs ..................................224
Starting device ............................26-27
Stationary vehicle ..........................138
Steering........................................242
Steering column stalks ......................57
Steering lock ..................................27
Steering wheel (adjustment lever) ......36
STR system (Sport Throttle Response) 63
Sun visors ....................................100
Sunroof ........................................103
Supply/ignition ............................238
Technical specifications..........231
Telephone (provision) ....................102
Third stop light (bulb change) ..........180
Top speeds ....................................239
Tow hook ..............................153-154
Towing the car or another vehicle......196
Towing trailers ..............................152
Transmission ................................242Travelling ......................................137
Tyres
- Correct reading ........................248
- Inflation pressure ......................247
- Winter tyres ............................147
Useful accessories ........................156
VDC (system)..............................117
VDC and ASR systems ....................117
Vehicle inactivity ............................155
Vehicle lifting ................................197
Warning lights ..............................73
Weights ........................................237
Wheel rims....................................245
Windscreen wiper ............................61
Wing mirrors ..................................37