Engine valve Citroen C3 2004 1.G Manual Online

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ENGINE
CHECKING AND SETTING THE VALVE TIMING
Engines: RHY RHZ N° RPO 9128 #
Slacken the screw (17)of the tensioner roller (18).
Remove the timing belt
(14).
Checks.
IMPERATIVE: Just before refitting, carry out the checks below.
Check that:
The rollers
(18)and (15)turn freely (without play and without any tight spot).
The coolant pump pulley
(16)turns freely (without play and without any tight spot).
There are no traces of oil leaks from the crankshaft and camshaft seals, etc.
The crankshaft pinion travels freely on the keyway.
Replace defective components if necessary.
Peg the crankshaft pinion
(19)by inserting tool [9]on the LH side of the keyway.
B1EP1A8DB1EP1A9C
XSARA XSARA PICASSO

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ENGINECHECKING AND SETTING THE VALVE TIMING
Engines: RHY RHZ N° RPO 9128 #
Reposition the timimg belt, belt at «a»well tensioned, in the following order:
Fuel high pressure pump pulley
(21).
Guide roller
(15).
Crankshaft pinion
(19).
Coolant pump pinion
(16).
Tensioner roller
(18).
Position tool
[1]on the belt at «a».
Remove tools
[4]and [9].
Turn the tensioner roller
(18)anticlockwise, using tool [2], to attain an overtension of:
98 ± 2 SEEM units.
Tighten screw
(17)of the tensioner roller to 2,5 ± 0,2 m.da N.
Lock the flywheel by means of tool
[6].
Tighten the accessories drive pulley screw
(8)to 7 ± 0,7 m.da N.
Remove tools
[1], [3], [5] and [6].
Rotate the crankshaft eight times in the normal direction of rotation.
Peg:
The crankshaft, using tool
[3].
The camshaft drive pulley, using tool
[5].
B1EP1ABDB1EP1ACC
XSARA XSARA PICASSO

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ENGINE
CHECKING AND SETTING THE VALVE TIMING
Engines: RHY RHZ N° RPO 9128 #
Lock the engine flywheel, using tool [6].
Slacken:
The accessories drive pulley
(8).
The screw (17) of the tensioner roller (18).
Fit the tool [1].
Turn the tensioner roller, using tool [2], to attain a tension of:54 ± 2 SEEM units.
Tighten screw (17)of the tensioner roller (18)to 2,5 ± 0,2 m.daN.
Remove tool [1].
Fit tool [1].
The tension value should be:
54 ±3 SEEM units.ESSENTIAL: If the value is incorrect, recommence the operation.
Remove tools [1], [3], [5]and [6].
Rotate the crankshaft two times in the normal direction of rotation.
Peg:
The crankshaft, using tool
[3].
The camshaft drive pulley.
IMPERATIVE:If the pegging is not possible, recommence the operation.
B1EP1ACC
XSARA XSARA PICASSO

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ENGINECHECKING AND SETTING THE VALVE TIMING
Engines: RHY RHZ N° RPO 9128 #
Remove:
Tools [3]and [5].
Screw (7)and the spacer.
Refit: The lower, intermediate and upper covers
(5).
Screw (7), tighten to 1,5 ± 0,1 m.daN.
Screws (3), (4)and (6).
The bracket (13).
Screws (11), tighten to 6,1 ± 0,5 m.daN.
The nut (12), tighten to 4,5 ± 0,5 m.daN.
Fit the bearing shell (10).
Take away the workshop hoist.
Clip the fuel delivery and return pipes. Remove the tool
[7].
Couple:
The fuel delivery pipe
(12).
The fuel return pipe (1).
Coat the screw (8)with loctite FRENETANCH.
Refit the tool [6]and the screw (8)with the washer (22),
Tighten to 7 ± 0,2 m.daNand angular tighten to A = 60° ± 5°
[6].
Reposition and reclip the cooling hose.
Complete the refitting of components in reverse order to removal.
B1EP1A7CB1BP2R4CB1EP1ADC
XSARA XSARA PICASSO

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ENGINEVALVE CLEARANCE SETTINGS
The valve clearances must be checked with the engine cold
Inlet
Petrol all types(Except16VNFU)
NFU
Petrol 16V all types
1.4 HDi
1.4 HDi 16V
Diesel 2.0 HDi
Diesel all types(Except Diesel 1.4 HDi
1.4 HDi 16V
2.0 HDi)0,20 mm ± 0,05Exhaust
0,40 mm ± 0,05
Hydraulic adjustment 1 mm ± 0,05
1 mm ± 0,05
Rocking
Adjust
1
1
3
3
4
4
2
24
4
2
2
1
1
3
3
Inlet

Adjust Rocking
Valves fully
openAdjust
1
3423 4
4
2
2
1
1
3
Fully open (Exhaust)
POSSIBLE PROCEDURES
For engines with 4 cylinders in a line (1342 )
Engines without hydraulic
adjustment: the clearance (J)should be checked opposite the
cam.
B1DP13QC
0,15 mm ± 0,08
0,30 mm ±0,08

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INJECTION
CHECKING AND SETTING THE DELPHI MECHANICAL INJECTION PUMP
Engine: WJY (continued)
Peg:
The camshaft hub, using tool [2].
The injection pump hub, using tool [3].
Impossible to peg the camshaft.Reset the valve timing (See page 245).
Possible to peg the camshaft, but not the injection pump.Carry out the following operations:
Loosen the screws of the injection pump hub.
Turn the injection pump hub.
Insert the peg
[3]into the setting hole.
Tighten the screws of the injection pump hub.Tighten to 2,3 ±0,2 m.daN.
ESSENTIAL:If setting the diesel injection pump proves impossible, reset the valve
timing.(See page 251)
Remove:
The tools [1], [2]and [3].
The screw (6)and the washer.
Reassemble the components.
B1EP12WDB1BP1S9C
XSARA

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INJECTION
XSARA PICASSO CHECKS: LOW PRESSURE FUEL SUPPLY CIRCUIT
Engines: RHY RHZ (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] = 0.7 ± 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 3and 3.5 Bar 0,7 ± 0,2 BarCheck the condition of the diesel filter
More than
3.5 Bar
More than 3.5 Bar
Less than 0.7 Bar
More than 0.7 Bar
Check the low pressure regulator incorporated in
the filter (locked shut): replace.
Check the fuel return circuit
(pipe pinched or trapped…)
Between 0.8 and 1.5 BarLess than 0.7 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
CHECKING THE AIR SUPPLY CIRCUIT
Engines: RHY RHZ
XSARA PICASSO
Tools.
[1]Manual vacuum pump : FACOM DA 16
IMPERATIVE: Respect the safety and cleanliness requirements.
Vacuum pump.
Connect the tool [1]on the vacuum pump (1).
Start the engine.
Pressure should be
0.8 barat 780 rpm.Boost pressure regulator electrovalve. Connect the tool [1]between the electrovalve (2)and the valve (3)of the boost pressure
regulator.
Compare readings with the values in the table below.
Pressure regulator valve. Connect the tool [1]on the valve (3).
Appy a pressure of 0.5 barto activate the rod "a":
Rod "a"should be moved 12 mm.
Engine speed (rpm) Pressure (Bar)
780 0,6
4000 0,25
B1HP12FD

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INJECTION
CHECKS: EXHAUST GASES RECYCLING CIRCUIT
Engines: 8HX 8HW
Engines: 8HV 8HY
Tools.
[1]
Manual pressurevacuum pump: FACOM DA 16
IMPERATIVE: Respect the safety and cleanliness specific to high pressure diesel
injection (HDi) engines.
EGR v
alve.Connect tool [1]on the capsule takeoff (2).
Apply a vacuum of approx.0,6 barseveral times to activate the rod «a».
In abruptly suppressing the vacuum, the valve should click and lock itself back on its seating.
Regulation electrovalve (EGR).(Engine:8HX8HW).Check to be performed between the electrovalve (1)and the EGR valve (2).
Link the tool [1]in series, between the electrovalve (1)and the capsule (2).
Compare the values noted with those in the table below.
Regulation electrovalve (EGR).(Engine:8HV8HY).Check to be performed between the electrovalve (2)and the EGR valve (1).
Link the tool [1] in series, between the electrovalve (2)and the capsule (1).
Compare the values noted with those in the table below.
Engine speed (rpm) Vacuum value
780 0,5
2500 0
B1HP15GD
B1HP1K6D
C2 C3

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INJECTION
CHECKS: EXHAUST GASES RECYCLING CIRCUIT
Engines: 9HZ 9HY
B1HP1UPC
B1HP1UQC
XSARA PICASSO
Exhaust gas recycling (EGR) valve.
(1)
Exhaust gas recycling (EGR) electrovalve
NOTE:The engine ECU pilots the EGR valve.
Perform the check with the aid of a diagnostic tool.
Carry out the following operations with the diagnostic tool:
«INJECTION» menu.
Actuator tests.
EGE electrovalve.
Check that you can hear the click from the EGR regulation electrovalve.
Double butterfly housing (vehicle with particle filter).
(2)
Double butterfly housing.
Perform the check with the aid of a diagnostic tool.
Carry out the following operations with the diagnostic tool:
«INJECTION» menu.
Actuator tests.
Butterfly.
EGR exchanger butterfly.
Check that you can hear the click from the double butterfly housing.