2008 Citroen C4 Owner's Manual

118
X
M A I N T E N A N C E
DIESEL ENGINES
They give access for checking the levels of the various fl uids, the replacement of certain items and priming the fuel system.
1. Power steering reservoir.
2. Screen and headlamp wash reservoir.
3. Engine coolant.
4. Brake fl uid reservoir.
5. Battery.
6. Fusebox.
7. Air fi lter*.
8. Engine oil dipstick.
9. Topping up engine oil.
10. Priming pump*.
11. Bleed screw*.
* Depending on engine.

119
X
M A I N T E N A N C E
Air fi lter
Follow the recommendations in the Maintenance Guide.
When working under the bonnet, when the engine is hot (even stopped and the ignition switched off), the cooling fan coul d operate at any time.
Check the engine oil level frequently between routine service visits, as well as prior to long journeys.
Engine coolant
The coolant level should be between the MAX and MINmarks on the header tank.
If the engine is hot, wait 15 minutes.
Quality: See "Maintenance Guide"
Never work on the cooling system if the engine is hot.
12 volt battery
See "Practical advice".
Engine oil
Check the oil level with the vehicle parked on level ground, after the engine has been switched off for at least fi fteen minutes.
Quality: See "Maintenance Guide"
Brake fl uid
The fl uid level must be situated within the MAX and MIN marks visible on the reservoir.
The screenwash fl uid should be replaced periodically as it loses its effectiveness over time.
Quality: See "Maintenance Guide"
If the warning lamp comes on while you are driving, stop immediately and contact the CITROËN network.you are driving, stop immediately stop immediately
Dust fi lter/odour fi lter (active carbon)
See "Maintenance Guide"
Take out the oil dipstick.
The level must be between the MAX and MIN marks on the dipstick
It should never exceed the maximum mark.
Windscreen, rear screen and headlamp washer fl uid
It is recommended that you use products approved by CITROËN.It is recommended that you hat you
Screenwash fl uid reservoir: 3.5 litres.
Screen and headlamp wash reservoir: 6.5 litres.
Specifi cation for the fl uid
To ensure optimum cleaning and to avoid freezing, topping up or fi lling of the reservoir must not be done with just water.
MAX
MIN
LEVELS

120
X
M A I N T E N A N C E
Radiator - coolant
The coolant must only be checked or topped up if the power unit is cold.
Engine hot
As the cooling system is pressurised, wait for at least one hour after switching off the engine before intervening.
To avoid the risk of scalding, slacken the cap two turns to allow the pressure to escape. Once the pressure has fallen, remove the cap and top up the level.
Adding engine oil
Remove the dipstick before topping up. Check the level after fi lling.
It should never exceed the maximum mark.
Screw on the cap before closing the bonnet.
Quality: See "Maintenance Guide".
Topping up the cooling system
The coolant level should be between the MAX and MINmarks on the header tank.
Top up the level. If you have to add more than 1 litre, you should have the cooling system checked by CITROËN.the cooling the cooling
Make sure that the cap is on correctly
Note: The necessity to top up frequently would indicate a malfunction that should be checked at the earliest opportunity.
Note: On vehicles equipped with a particle fi lter, the cooling fan may operate for some ten minutes after the engine has stopped.
LEVELS

121
X
M A I N T E N A N C E
Windscreen and rear screen washer fl uid
For best results as well as for your safety, use only CITROËN approved products which protect at temperatures as low as -25 °C to -30 °C.
It is essential to have suffi cient screen wash fl uid if your vehicle is equipped with Xenon headlamps.
To check the level, place a fi nger on aperture A before removing the cap.
Capacity: 3.5 litres.
Capacity with headlamp washers: 6.5 litres.
Brake fl uid
The synthetic fl uid not only gives protection against corrosion but also ensures correct functioning of the braking system in all environmental conditions, therefore you should only use the synthetic product recommended by the CITROËN only use the synthetic product product
network. (this fl uid must be replaced every two years).
These important requirements are detailed in your vehicle’s Maintenance Guide.
Quality: See "Maintenance Guide".
When working under the bonnet, when the engine is hot (even stopped and the ignition switched off), the cooling fan coul d operate at any time.
Brake fl uid reservoir
Check and top up at regular intervals.
The fl uid level must be situated within the max and min marks visible on the reservoir.
If the warning lamp comes on when driving, stop as quickly as possible and contact a CITROËN dealer.driving, stop as quickly as possible quickly

122
X
M A I N T E N A N C E
Protection cover
HDi 135 and 140 engines
Remove the protection cover by fi rst unclipping point 1, then 3 and4. Detach point 2 by pulling towards you, then lift.
To reposition the protection cover, attach point 2 fi rst. Lower the cover, keeping it centred. Clip points 1 and4, pushing vertically and slightly rearwards. Clip point 3 pushing down vertically.
HDi engines are of a highly technical nature.
All maintenance and repairs require specifi c qualifi cations which only your CITROËN Dealer can guarantee.All maintenance and repairs require specifi c qualifi cations All maintenance and repairs require specifi c qualifi cations
Bleeding of water from the diesel fuel fi lter
To be bled on a regular basis (at every oil change).
To evacuate the water, slacken the bleed screw or the water in diesel fuel sensor, which is located at the base of the fi lter, until water ceases to fl ow out.
Then retighten the bleed screw or the water in diesel fuel sensor.
DIESEL INJECTION EQUIPMENTWear of brake discs, brake pads and brake drums
The rate of wear of the brake pads depends on the use of your vehicle (urban use, frequent stops), and on your style of driving or the type of journey.
For information on checking the discs and drums for wear, contact a CITROËN dealer.
After washing the vehicle, brake progressively to dry out the brake linings.

122
X
M A I N T E N A N C E
Protection cover
HDi 135 and 140 engines
Remove the protection cover by fi rst unclipping point 1, then 3 and4. Detach point 2 by pulling towards you, then lift.
To reposition the protection cover, attach point 2 fi rst. Lower the cover, keeping it centred. Clip points 1 and4, pushing vertically and slightly rearwards. Clip point 3 pushing down vertically.
HDi engines are of a highly technical nature.
All maintenance and repairs require specifi c qualifi cations which only your CITROËN Dealer can guarantee.All maintenance and repairs require specifi c qualifi cations All maintenance and repairs require specifi c qualifi cations
Bleeding of water from the diesel fuel fi lter
To be bled on a regular basis (at every oil change).
To evacuate the water, slacken the bleed screw or the water in diesel fuel sensor, which is located at the base of the fi lter, until water ceases to fl ow out.
Then retighten the bleed screw or the water in diesel fuel sensor.
DIESEL INJECTION EQUIPMENTWear of brake discs, brake pads and brake drums
The rate of wear of the brake pads depends on the use of your vehicle (urban use, frequent stops), and on your style of driving or the type of journey.
For information on checking the discs and drums for wear, contact a CITROËN dealer.
After washing the vehicle, brake progressively to dry out the brake linings.

123
X
M A I N T E N A N C E
HDi 135 and 140 engines
Detach the protection cover to access the priming pump.
HDi engines are of a highly technical nature.
All maintenance and repairs require specifi c qualifi cations which only your CITROËN require specifi c qualifi cations require specifi c qualifi cations
Dealer can guarantee.
HDi 90 and 110 engines
Detach the protection cover to access the priming pump.
In the event of running out of fuel:
- After fi lling (5 litres minimum), op-erate the manual priming pump until some resistance is felt.
- Operate the starter motor while depressing the accelerator pedal slightly until the engine starts.
If the engine fails to start at the fi rst attempt, wait 15 seconds before try-ing again.
If the engine fails to start after sev-eral attempts, repeat the procedure from the beginning.
When the engine is idling, acceler-ate slightly to complete the bleeding of the circuit.
PRIMING THE DIESEL FUEL SYSTEM

124
XI
P R A C T I C A L A D V I C E
If you have put in fuel that
is wrong for your vehicle,
it is essential to have the
tank drained before you
start the engine.
For petrol engines with catalytic
converter, use of unleaded fuel is
obligatory
The fi ller neck has a narrower orifi ce
to admit only petrol fi ller nozzles.
When you are fi lling your fuel
tank, do not persist after the third
cutoff; this could cause your ve-
hicle to malfunction.UNLEADED PETROL
DIESEL FUEL
Petrol engines are designed to run on RON 95 fuel.
However, for better vehicle perfor-mance (petrol engines), we recom-mend RON 98.
A label on the inside of the fuel fi ll-er fl ap indicates the approved fuel quality type.
FUELBioFlex
Your vehicle has been designed to
operate
equally on unleaded pet-
rol (95 or 98) or on bioethanol (in
Europe this is a mixture of 85 %
ethanol and 15 % unleaded petrol,
known as E85).
A label inside the fuel fi ller fl ap indi-
cates the fuels authorised:
In winter conditions, starting from cold may seem diffi cult. During periods of very cold weather we recommend the use of 95 or 98 unleaded petrol in preference to B85 so as to ensure optimum starting per-formance.
Other than the question of the two authorised fuels, your vehicle is used in the same way as a traditional petrol vehicle.