2000 Citroen C5 ESP

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100
EXHAUST SPECIFICATIONS
Engine : 4HX
Tightening torques (m.daN)
(2) Collars 2.5 ± 0.3
Repair
Respect the precautions to be taken when
operating on a vehicle.
The flexible pipe must not come into contact
with corrosive products.
Do not distort the flexible pipe by more than20°
angular (X), 20mm axial, 25 mmshear (Y)
(flexible pipe not fitted).
Do not distort the flexible pipe by more than 3°
angular (X),0 mmaxial, 3 mmshear
(Y)(flexible pipe in place).
WARNING :Non-respect for these precautions
will result in a reduction in the lifetime of the
flexible pipe. It is thus essential to disconnect or
remove the exhaust line in any operation neces-
sitating the lifting of the power unit.
Engine Front pipe (1) Pre-catalyser (3) Particle filter (4) Rear silencer (5)
4HX Flexible PSA K 186 PSA F 002 PSA 4158

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108
CHECKING THE OIL PRESSURE
Engine type
Temperature (°C)
Pressure (Bars)
Rpm
Engine type
Temperature (°C)
Pressure (Bars)
Rpm6FZ RFN RLZ XFX
90°C
1.5 5 1.5 5 1.5 5 7 8
1000 3000 1000 3000 1000 3000 900 3000
Diesel engines 1.8i 16V
2.0 HDi 2.2 HDi2.0i 16V2.0 HPi3.0i V6 Petrol engines
Tools
Tool kit 4103-T
RHY RHZ 4HX
90°
242 424
1000 2000 1000 2000 1000 2000
ESSENTIAL : Respect the safety and cleanliness recommendations.

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109
To be read together with the Petrol and Diesel correspondence tables
OIL FILTERS
PURFLUXLS 304
LS 880
SpecificationsDia. (mm)Height (mm)
LS 880 LS 3047689
6FZ RFN RLZ XFX RHY RHZ 4HX
XX X X XX
X

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110
FILLING AND BLEEDING THE COOLING CIRCUIT
TOOLS
[1] Filling cylinder: 4520-T
[2]Adaptor for filling cylinder: 4222-T.
ESSENTIAL : Respect the safety and cleanliness recommendations.
- The draining and refilling operations can be carried out by means of a WINN’S coolant replacement
apparatus or similar; it is essential to follow the instructions when using this apparatus.
Filling and bleeding
- Fit the cylinder adaptor [2] 4222-Tand the filling cylinder [1] 4520 -T.
- Use the coolant to ensure protection between - 15°Cand - 37°C.
- Slowly fill the system.
NOTE :Keep the cylinder filled up (visible level).
- Close each bleed screw as soon as the coolant flows without air bubbles.
- Start the engine : Engine speed 1500 rpm.
- Maintain this speed until the third cooling cycle (cooling fans have cut in and cut out).
- Stop the engine and allow it to cool down.
- Remove the filling cylinder [1] 4520-T and the adaptor [2] 4222-T.
- Top up the system to the maximum mark, with the engine cold.
- Refit the filler cap.
E5AP1GNCB1GP00AC

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INJECTION
SAFETY REQUIREMENTS : HDi DIRECT INJECTION SYSTEM
Engines : RHY - RHZ - 4HX
SAFETY REQUIREMENTS
Preamble.
All interventions on the injection system must be carried out to conform with the following requirements and regulations :
- Competent health authorities.
- Accident prevention.
- Environmental protection.
WARNING :Repairs must be carried out by specialised personnel informed of the safety requirements and of the precautions to be taken.
Safety requirements.
IMPERATIVE : Take into account the very high pressures in the high pressure fuel circuit (1350 bars), and respect
the requirements below :
- No smoking in proximity to the high pressure circuit when work is being carried out.
- Avoid working close to flame or sparks.
Engine running :
- Do not work on the high pressure fuel circuit.
- Always stay clear of the trajectory of any possible jet of fuel, which could cause serious injuries.
- Do not place your hand close to any leak in the high pressure fuel circuit.
After the engine has stopped, wait 30 secondsbefore any intervention.
NOTE :This waiting time is necessary in order to allow the high pressure fuel circuit to return to atmospheric pressure.

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INJECTION
SAFETY REQUIREMENTS : HDi DIRECT INJECTION SYSTEM
Engines : RHY - RHZ - 4HX
CLEANLINESS REQUIREMENTS.
Preliminary operations
IMPERATIVE : The technician should wear clean overalls.
Before working on the injection system, it may be necessary to clean the apertures of the following sensitive components :
(refer to corresponding procedures).
- Fuel filter.
- High pressure fuel pump.
- Third piston deactivator.
- High pressure regulator.
- High pressure sensor.
- High pressure fuel injection common rail.
- High pressure fuel pipes
- Diesel injector carriers.
IMPERATIVE : After dismantling, immediately block the apertures of the sensitive components with plugs, to avoid the entry of impurities.
Work area.
- The work area must be clean and free of clutter.
- Components being worked on must be protected from dust contamination.

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INJECTION
AIR SUPPLY CIRCUIT SPECIFICATION
Engine : 4HX
ESSENTIAL : Respect the safety and cleanliness
recommendations.
Tool.
[1] Manual vacuum pump: FACOMM DA 16.
Checks.
ESSENTIAL : Respect the safety and cleanliness
recommendations that are specific to high pressure
diesel injection (HDi) engines.
B1HP1ARP

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INJECTION
CHECKS : EXHAUST GASES RECYCLING CIRCUIT
Engines : RHZ - RHY
(1) Butterfly housing(3) Electrovalve (black connector)
(2) EGR valve(tube with blue marking)(4) Electrovalve(blue connector)
TOOL
[1] Manual vacuum pump : FACOM DA 16.
ESSENTIAL : Respect the safety and cleanliness requirements specific to
high pressure diesel injection (HDi) engines.
EGR electrovalve
- Check, not under load, between the electrovalve(4)and the EGR valve (2).
- Connect the tool[1] between the electrovalve (3)and the butterfly housing (1).
- Compare readings with the values in the table below.
Butterfly housing electrovalve.
- Check, not under load, between the electrovalve (3)and the butterfly housing (1).
- Connect the tool[1]between the electrovalve(3) and the butterfly housing(1).
- Compare readings with the values in the table below.
Engine speed (rpm) Vacuum value (bar)
7800.5 Bar
25000 Bar
B1HP1BVD