2005 Citroen C4 c4 picasso

Downloaded from www.Manualslib.com manuals search engine 269
ENGINE
CHECKING AND SETTING THE VALVE TIMING
Engines: RHY - RHZ
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 SEEMunits.
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 SEEMunits.
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
Angl.-t2-page240-282-2005 9/01/06 10:16 Page 269

Downloaded from www.Manualslib.com manuals search engine 270
ENGINECHECKING AND SETTING THE VALVE TIMING
Engines: RHY - RHZ
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.daN
and angular tighten to A= 60°±5°.
Refit the torque reaction rod on the lower engine support.
Remove the tool [6].
Reposition and reclip the cooling hose.
Complete the refitting of components in reverse order to removal.
B1EP1A7CB1BP2R4CB1EP1ADC
XSARA - XSARA PICASSO
Angl.-t2-page240-282-2005 9/01/06 10:16 Page 270

Downloaded from www.Manualslib.com manuals search engine 281
ENGINE
CHECKING THE OIL PRESSURE
To be read with the Petrol and Diesel correspondence tables
XSARA PICASSO
Engine type NFV 6FZ RFN 9HZ 9HY RHY
Temperature (°C) 90°C 80°C 90°C
Pressure (bars) 3,3 1,5 1,3 2
Rpm 1000
Pressure (bars) 3
Rpm 2000
Pressure (bars) 5
Rpm 3000
Pressure (bars) 4 6,3 3,5 4
Rpm 4000 4000
Tools (Toolkit 4103-T)
2279-T.Bis X X X X X X
4103-T X X X X X X
7001-T X
4202-T X X X
1503-J X X
NOTE: The oil pressure should be checked with the engine hot, after the oil level has been checked.
XSARA PICASSO
Angl.-t2-page240-282-2005 9/01/06 10:16 Page 281

Downloaded from www.Manualslib.com manuals search engine 285
INJECTION
CHECKS: LOW PRESSURE FUEL SUPPLY CIRCUIT
Tools.
[1] Ø 10 mm low pressure connector: 4215-T
[2] Pressure gauge for testing boost pressure: 4073-T.A Toolkit 4073-T
IMPERATIVE: Respect the safety and cleanliness specific to high pressure diesel injection
engines.
Remove the air filter duct.
Link tool [1]in series, downstream of the injectors, between the fuel high pressure pump and the
fuel filter at «a»and «b».
WARNING: Any checking of pressure downstream of the fuel filter is prohibited.
Switch on the ignition.
ESSENTIAL: Check that the tool [2] is clean.
Check the negative pressure according to the table below:
Vacuum Observations
10 ± 05 cmhgEngine driven by the starter motor
20 ± 20 cmhgEngine running under full load
60 ± 05 cmhgSupply circuit obstructed
(full tank strainer, piping, fuel filter
B1BP2PHC
Engines: 9HZ - 9HY
XSARA PICASSO
Angl.-t2-page283-305-2005 9/01/06 10:18 Page 285

Downloaded from www.Manualslib.com manuals search engine 288
INJECTION
CHECKS: LOW PRESSURE FUEL SUPPLY CIRCUIT
Tools.
[1] Ø 10 mm low pressure connector: 4215-T
[2] Ø 8 mmlow pressure connector: 4218-T
[3]Pressure gauge for testing boost pressure: 4073-T Kit 4073-T
Connect the tool [1]between the booster pump and the fuel filter
(white mark at "a" on the fuel
supply pipe).
Connect the tool [2]downstream of the diesel injectors, between the high pressure fuel pump and
the fuel filter
(green mark at "b" on the fuel return pipe).
WARNING: Any check of pressure downstream of the fuel filter is PROHIBITED.
Checks on pressure: static.
- Switch on ignition.
For 3 seconds
(normal functioning):
- Fuel supply pressure shown by the pressure gauge [3] = 1.8 ± 0.4 bar.
- Fuel return pressure shown by the pressure gauge [3] = 0.5 ± 0.4 bar.
B1BP1TWD
Engines: RHY - RHZ
XSARA PICASSO
Angl.-t2-page283-305-2005 9/01/06 10:18 Page 288

Downloaded from www.Manualslib.com manuals search engine 289
INJECTION
CHECKS: LOW PRESSURE FUEL SUPPLY CIRCUIT
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
Fuel supply pressure Fuel return pressure Checks
Between 3and 3.5bar0.7 ± 0.2 bar Check the condition of the diesel filter
More than 3.5bar Less than 0.7barCheck the low pressure regulator incorporated
in the filter
(locked shut): replace.
More than 3.5bar More than 0.7barCheck the fuel return circuit
(pipe pinched or trapped…)
Between 0.8and 1.5bar Less than 0.7barCheck the fuel supply circuit:
- Booster pump (low pressure), piping
Impossible to start the engine:Check: diesel injector return flow
(table below).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).Uncouple the diesel injector return pipe.
Check: Observe:
The flow should be drop by drop Diesel injector functioning correctly
Excessive fuel return Diesel injector locked shutEngines: RHY - RHZ (continued)
XSARA PICASSO
Angl.-t2-page283-305-2005 9/01/06 10:18 Page 289

Downloaded from www.Manualslib.com manuals search engine 292
INJECTION
CHECKS: TURBO PRESSURE
IMPERATIVE: Respect the safety and cleanliness requirements.
Preparation.
IMPERATIVE: Respect the following test conditions:
- Engine at operating temperature.
- Vehicle in running order.
- Engine under full load.
Connect the diagnostic tool to the vehicle's diagnostic socket, carry out parameter measures.
Mode of operation.
Start the engine.
Engage first gear, start the vehicle.
Engage the gears up to third gear.
Decelerate to an engine speed of 1000 rpm.
Check the pressure: 0,6 ± 0,05 bar
(1500 rpm).
Accelerate freely (change from fourth gear to third gear).Check the pressure: 0,9 ± 0,05 bar (between 2500and 3500rpm).
Engines: 9HZ - 9HY
XSARA PICASSO
Angl.-t2-page283-305-2005 9/01/06 10:18 Page 292

Downloaded from www.Manualslib.com manuals search engine 294
INJECTION
CHECKS: TURBO PRESSURE
Tools.
[1]Pressure gauge for checking boost pressure: 4073-T.A Kit 4073-T
[2]Sleeve for checking boost pressure: 4185-T
Checks.
IMPERATIVE: respect the following checking requirements: Engine at running temperature.
Vehicle running at full load.
Preparation.
Remove the collar (3)and the sleeve.
Insert the tool [2]between the pipe (1)and the duct (2).
Position tool [1]in the vehicle.
Connect the pressure gauge [1]to the tool [2] with its tube «a»long enough for the gauge to be
positioned inside the vehicle.
Procedure.
Start the engine.
Engage first gearand start the engine.
Engage the gears up to third gear.
Decelerate to 2000 rpm.
Gradually accelerate.
Check the pressure: 0.95 ± 0.05 bar.
Remove the tools, refit the collars (3) and the sleeve.
B1BP1ZXD
Engine: RHY
XSARA PICASSO
Angl.-t2-page283-305-2005 9/01/06 10:18 Page 294