2000 Citroen C5 lock

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85
TOOLS
[1] Belt tension measuring instrument: 4122-T
[2] Engine flywheel peg: (-).0188.X.
[3]Tension lever: (-).0188.Y.
[4]Belt compression spring: (-).0188.K.
[5]Camshaft pinion peg: (-).0188.M.
[6] Engine flywheel lock: (-).0188.F.
[7]Set of blocking plugs: (-).0188.T.
IMPERATIVE : Respect the safety and cleanliness recommendations
specific to high pressure diesel injection (HDi) engines.
Checking the setting of the valve timing.
- Turn the crankshaft(normal direction of rotation)and line up the black
markings on the chain (b) and (c)with the teeth marked (a) and (d)of the
camshaft drive pinions (40 turns max. of the camshaft).
CHECKING AND SETTING THE VALVE TIMING
Engine : 4HX
B1EP159D

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88
CHECKING AND SETTING THE VALVE TIMING
Engine : 4HX
Setting the valve timing (continued).
Refit
- Retighten the screws (25) by hand.
- Turn the pinion (29)(clockwise)to the bottom of the buttonhole.
- Refit the belt on the crankshaft (28).
- Hold the belt, using tool[4].
- Reposition the timing belt, keeping the belt tight at «a», in the following order :
- Guide roller (27).
- Fuel high pressure pump pinion (30).
- Camshaft pinion (29).
- Water pump pinion (22).
- Tensioner roller (24).
NOTE : If needed, slightly turn the pinion (29)anti-clockwise(not by more
than one tooth).
- Remove the tool [4].
B1EP15CCB1EP15DDB1EP15BD

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Setting the valve timing (continued)
- Position tool [1]on the belt at«b».
- Turn the tensioner roller (24) (anti-clockwise)using tool [2]to attain a tension of :
106 SEEM units.
- Tighten screw (23) of the tensioner roller, tighten to 2.5 m.daN.
- Remove one screw (25) from the pinion (29).
(to check that the screws are not against the end of the buttonhole).
- Tighten the screws(25)to 2 m.daN.
- Remove tools [1]. [2]. [3]and [5].
- Rotate the crankshaft 8 times(normal direction of rotation).
- Fit the tool [3].
- Loosen screws (25).
- Fit tool [5].
- Loosen screw (23)(to free the tensioner roller (24).
- Fit tool[1].
- Turn the tensioner roller(24)(anti-clockwise),using tool[2], to attain a tension of :
51 SEEM units.
- Tighten :
- The screw (23) of the tensioner roller(24)to 2.5 ± 0.2 m.daN.
- The screws(25)to 2 ± 0.2 m.daN.
CHECKING AND SETTING THE VALVE TIMING
Engine : 4HX
B1EP15ED

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104
COOLING SYSTEM SPECIFICATIONS
Engine : RLZ
(1) Venting chamber
(2) Water pump
(3)Heater matrix
(4).Bleed screw, heater matrix
(5)Drain screw, cylinder block
(6) Coolant outlet housing
(7) Bleed screw, coolant outlet housing
(8) Bleed screw, top hose.
(9) Cooling radiator.
(10) Drain screw, cooling radiator
(11)Drain screw, cooling radiator.
Thermostat tightening : 1.7 ± 0.2m.daN
B1GP08JP

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106
COOLING SYSTEM SPECIFICATIONS
Engines : RHY-RHZ
(1) Venting chamber
(2) Heater matrix
(3) Coolant inlet housing
(4)Exhaust gas / coolant heat exchanger
(5)Bleed screw
(6)Cylinder block drain plug
(7) Coolant outlet housing
(8) Additional heating (Option or according to version)
(9) Radiator
(10) Coolant / oil heat exchanger
B1GP08EP

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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
CHECKS : LOW PRESSURE FUEL SUPPLY CIRCUIT
Engines : RHY - RHZ - 4HX (continued)
Checks on pressure : dynamic.
Engine running, at idle (normal functioning):
- Fuel supply pressure shown by the pressure gauge [3] = 2 ± 0.4 Bar.
- Fuel return pressure shown by the pressure gauge [3] = 0.8 ± 0.4 Bar.
Abnormal functioning
Impossible to start the engine :
Fuel supply pressure less than 0.8 Bar:
- Check the low pressure regulator incorporated in the filter(locked open)
- Check the high pressure pump distribution valve (locked shut)Check : diesel injector return flow. (Table below)
Uncouple the diesel injector return pipe.
Fuel supply pressure Fuel return pressure Checks
Between 3.3et 4 Bars 0.8 ± 0.4 BarCheck the condition of the diesel filter
More than 4 Bars
More than 4 BarsLess than 0.8 Bar
More than 0.8 BarCheck the low pressure regulator incorporated in
the filter (locked shut) : replace.
Check the fuel return circuit (pipe pinched or trapped...).
Between 0.8et 1.5 BarLess than 0.8 BarCheck the fuel suppy circuit :
- Booster pump(low pressure), piping.
Check :
Observe :
The flow should be drop by drop
Diesel injector functioning correctly
Excessive fuel return
Diesel injector locked shut.

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INJECTION
CHECKS : EXHAUST GASES RECYCLING CIRCUIT
Engines : RHZ – RHY
EGR valve
- Connect tool [1]on the EGR valve capsule take-off (2).
- Apply a vacuum of approx.0,6 barto activate the EGRvalve.
- In abruptly suppressing the vacuum, the valve should click and lock itself back on its seating.
- Repeat the operation several times.
Butterfly housing
- Remove the air duct between the air/air exchanger and the butterfly housing (5),(1).
- Connect tool[1]on the butterfly housing vacuum capsule (1).
- Apply a vacuum of approx. 0,8 bar, the flap (a)of the butterfly housing(1)should be closed.
B1HP1BWCB1BP2ADC